Make improvements

- Introduce portable sched_getcpu() api - Support GCC's __target_clones__ feature - Make fma() go faster on x86 in default mode - Remove some asan checks from core libraries - WinMain() now ensures $HOME and $USER are defined
2025-03-02 23:18:44 +00:00 · 2024-02-01 03:39:46 -08:00 · 2024-02-01 03:39:46 -08:00 · 2ab9e9f7fd
commit 2ab9e9f7fd
parent d5225a693b
192 changed files with 2809 additions and 932 deletions
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@ -48,7 +48,7 @@
 				"notpossible=",
 				"thatispacked=",
 				"dontthrow=",
-				"nocallback=",
+				"dontcallback=",
 				"relegated=",
 				"hidden=",
 				"textstartup=",
--- a/8
+++ b/8
@ -101,7 +101,6 @@ XARGS ?= xargs -P4 -rs8000
 DOT ?= dot
 CLANG = clang
 TMPDIR = o/tmp
-
 AR = build/bootstrap/ar.com
 CP = build/bootstrap/cp.com
 RM = build/bootstrap/rm.com -f
@ -134,10 +133,10 @@ endif

 ifneq ($(findstring aarch64,$(MODE)),)
 ARCH = aarch64
-HOSTS ?= pi studio freebsdarm
+HOSTS ?= pi pi5 studio freebsdarm
 else
 ARCH = x86_64
-HOSTS ?= freebsd rhel7 xnu win10 openbsd netbsd
+HOSTS ?= freebsd rhel7 xnu win10 openbsd netbsd meatball nightmare
 endif

 ZIPOBJ_FLAGS += -a$(ARCH)
@ -209,7 +208,7 @@ endif
 	libc/stdbool.h				\
 	libc/disclaimer.inc			\
 	rwc:/dev/shm				\
-	rx:cosmocc				\
+	rx:.cosmocc				\
 	rx:build/bootstrap			\
 	r:build/portcosmo.h			\
 	/proc/stat				\
@ -481,6 +480,7 @@ COSMOPOLITAN_OBJECTS =			\
 	LIBC_STR			\
 	LIBC_SYSV			\
 	LIBC_INTRIN			\
+	LIBC_NT_BCRYPTPRIMITIVES	\
 	LIBC_NT_KERNEL32		\
 	LIBC_NEXGEN32E

--- a/ape/ape-m1.c
+++ b/ape/ape-m1.c
@ -39,7 +39,7 @@
 /* maximum path size that cosmo can take */
 #define PATHSIZE       (PATH_MAX < 1024 ? PATH_MAX : 1024)
 #define SYSLIB_MAGIC   ('s' | 'l' << 8 | 'i' << 16 | 'b' << 24)
-#define SYSLIB_VERSION 8
+#define SYSLIB_VERSION 9 /* sync with libc/runtime/syslib.internal.h */

 struct Syslib {
  int magic;
@ -96,11 +96,16 @@ struct Syslib {
  long (*sem_trywait)(int *);
  long (*getrlimit)(int, struct rlimit *);
  long (*setrlimit)(int, const struct rlimit *);
-  // v6 (2023-11-03)
+  /* v6 (2023-11-03) */
  void *(*dlopen)(const char *, int);
  void *(*dlsym)(void *, const char *);
  int (*dlclose)(void *);
  char *(*dlerror)(void);
+  /* MANDATORY (cosmo runtime won't load if version < 8)
+     ---------------------------------------------------
+     OPTIONAL (cosmo lib should check __syslib->version) */
+  /* v9 (2024-01-31) */
+  int (*pthread_cpu_number_np)(size_t *);
 };

 #define ELFCLASS32                  1
@ -660,9 +665,9 @@ __attribute__((__noreturn__)) static void Spawn(const char *exe, int fd,
      size = (p[i].p_vaddr & (pagesz - 1)) + p[i].p_filesz;
      if (prot1 & PROT_EXEC) {
 #ifdef SIP_DISABLED
-        // if sip is disabled then we can load the executable segments
-        // off the binary into memory without needing to copy anything
-        // which provides considerably better performance for building
+        /* if sip is disabled then we can load the executable segments
+           off the binary into memory without needing to copy anything
+           which provides considerably better performance for building */
        rc = sys_mmap(addr, size, prot1, flags, fd, p[i].p_offset & -pagesz);
        if (rc < 0) {
          if (rc == -EPERM) {
@ -674,12 +679,12 @@ __attribute__((__noreturn__)) static void Spawn(const char *exe, int fd,
          }
        }
 #else
-        // the issue is that if sip is enabled then, attempting to map
-        // it with exec permission will cause xnu to phone home a hash
-        // of the entire file to apple intelligence as a one time cost
-        // which is literally minutes for executables holding big data
-        // since there's no public apple api for detecting sip we read
-        // as the default strategy which is slow but it works for both
+        /* the issue is that if sip is enabled then, attempting to map
+           it with exec permission will cause xnu to phone home a hash
+           of the entire file to apple intelligence as a one time cost
+           which is literally minutes for executables holding big data
+           since there's no public apple api for detecting sip we read
+           as the default strategy which is slow but it works for both */
        rc = sys_mmap(addr, size, (prot1 = PROT_READ | PROT_WRITE),
                      MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS, -1, 0);
        if (rc < 0) Pexit(exe, rc, "prog mmap anon");
@ -812,12 +817,10 @@ static const char *TryElf(struct ApeLoader *M, union ElfEhdrBuf *ebuf,
    }
  }

-  /*
-   * merge adjacent loads that are contiguous with equal protection,
-   * which prevents our program header overlap check from needlessly
-   * failing later on; it also shaves away a microsecond of latency,
-   * since every program header requires invoking at least 1 syscall
-   */
+  /* merge adjacent loads that are contiguous with equal protection,
+     which prevents our program header overlap check from needlessly
+     failing later on; it also shaves away a microsecond of latency,
+     since every program header requires invoking at least 1 syscall */
  for (i = 0; i + 1 < e->e_phnum;) {
    if (p[i].p_type == PT_LOAD && p[i + 1].p_type == PT_LOAD &&
        ((p[i].p_flags & (PF_R | PF_W | PF_X)) ==
@ -944,6 +947,7 @@ int main(int argc, char **argv, char **envp) {
  M->lib.dlsym = dlsym;
  M->lib.dlclose = dlclose;
  M->lib.dlerror = dlerror;
+  M->lib.pthread_cpu_number_np = pthread_cpu_number_np;

  /* getenv("_") is close enough to at_execfn */
  execfn = 0;
--- a/ape/ape.lds
+++ b/ape/ape.lds
@ -282,12 +282,9 @@ SECTIONS {
    KEEP(*(SORT_BY_NAME(.init.*)))
    KEEP(*(.init))
    KEEP(*(.initepilogue))
-    KEEP(*(.pltprologue))
    *(.plt)
-    KEEP(*(.pltepilogue))
-    KEEP(*(.pltgotprologue))
    *(.plt.got)
-    KEEP(*(.pltgotepilogue))
+    *(.iplt)
    *(.text.startup .text.startup.*)
    *(.text.exit .text.exit.*)
    *(.text.unlikely .text.*_unlikely .text.unlikely.*)
@ -323,7 +320,7 @@ SECTIONS {

 /*BEGIN: Read Only Data */

-  .rodata . : {
+  .rodata ALIGN(CONSTANT(COMMONPAGESIZE)) : {
    KEEP(*(.rodata.pytab.0));
    KEEP(*(.rodata.pytab.1));
    KEEP(*(.rodata.pytab.2));
@ -398,13 +395,12 @@ SECTIONS {
    KEEP(*(SORT_BY_NAME(.sort.data.*)))
    . += . > 0 ? CODE_GRANULE : 0;

-    KEEP(*(.gotprologue))
+    . = ALIGN(. != 0 ? __SIZEOF_POINTER__ : 0);
+    __got_start = .;
    *(.got)
-    KEEP(*(.gotepilogue))
+    __got_end = .;

-    KEEP(*(.gotpltprologue))
    *(.got.plt)
-    KEEP(*(.gotpltepilogue))

    . = ALIGN(. != 0 ? __SIZEOF_POINTER__ : 0);
    __init_array_start = .;
@ -430,6 +426,8 @@ SECTIONS {
    KEEP(*(SORT_BY_NAME(.piro.data.sort.*)))
    KEEP(*(.piro.pad.data))
    KEEP(*(.dataepilogue))
+    *(.igot.plt)
+
    . = ALIGN(. != 0 ? CONSTANT(COMMONPAGESIZE) : 0);
 /*END: NT FORK COPYING */
    _edata = .;
@ -528,6 +526,7 @@ SECTIONS {
 #endif
    *(__patchable_function_entries)
    *(__mcount_loc)
+    *(.rela.dyn)
    *(.discard)
    *(.yoink)
  }
--- a/ape/loader.c
+++ b/ape/loader.c
@ -166,13 +166,6 @@
   (unsigned long)(255 & (S)[1]) << 010 | \
   (unsigned long)(255 & (S)[0]) << 000)

-#define DEBUG(VAR)                          \
-  {                                         \
-    char ibuf[19] = {0};                    \
-    Utox(ibuf, VAR);                        \
-    Print(os, 2, ibuf, " " #VAR, "\n", 0l); \
-  }
-
 struct ElfEhdr {
  unsigned char e_ident[16];
  unsigned short e_type;
@ -340,23 +333,6 @@ static char *GetEnv(char **p, const char *s) {
  return 0;
 }

-static char *Utox(char p[19], unsigned long x) {
-  int i;
-  if (x) {
-    *p++ = '0';
-    *p++ = 'x';
-    i = (__builtin_clzl(x) ^ (sizeof(long) * 8 - 1)) + 1;
-    i = (i + 3) & -4;
-    do {
-      *p++ = "0123456789abcdef"[(x >> (i -= 4)) & 15];
-    } while (i);
-  } else {
-    *p++ = '0';
-  }
-  *p = 0;
-  return p;
-}
-
 static char *Utoa(char p[20], unsigned long x) {
  char t;
  unsigned long i, a, b;
@ -534,6 +510,53 @@ static long Print(int os, int fd, const char *s, ...) {
  return Write(fd, b, n, os);
 }

+static long Printf(int os, int fd, const char *fmt, ...) {
+  int i;
+  char c;
+  int k = 0;
+  unsigned u;
+  char b[512];
+  const char *s;
+  unsigned long d;
+  __builtin_va_list va;
+  __builtin_va_start(va, fmt);
+  for (;;) {
+    switch ((c = *fmt++)) {
+      case '\0':
+        __builtin_va_end(va);
+        return Write(fd, b, k, os);
+      case '%':
+        switch ((c = *fmt++)) {
+          case 's':
+            for (s = __builtin_va_arg(va, const char *); s && *s; ++s) {
+              if (k < 512) b[k++] = *s;
+            }
+            break;
+          case 'd':
+            d = __builtin_va_arg(va, unsigned long);
+            for (i = 16; i--;) {
+              u = (d >> (i * 4)) & 15;
+              if (u < 10) {
+                c = '0' + u;
+              } else {
+                u -= 10;
+                c = 'a' + u;
+              }
+              if (k < 512) b[k++] = c;
+            }
+            break;
+          default:
+            if (k < 512) b[k++] = c;
+            break;
+        }
+        break;
+      default:
+        if (k < 512) b[k++] = c;
+        break;
+    }
+  }
+}
+
 static void Perror(int os, const char *thing, long rc, const char *reason) {
  char ibuf[21];
  ibuf[0] = 0;
@ -901,7 +924,7 @@ EXTERN_C __attribute__((__noreturn__)) void ApeLoader(long di, long *sp,
  long *auxv, *ap, *endp, *sp2;
  char *p, *pe, *exe, *prog, **argv, **envp;

-  (void)Utox;
+  (void)Printf;

  /* detect freebsd */
  if (SupportsXnu() && dl == XNU) {
--- a/ape/sections.internal.h
+++ b/ape/sections.internal.h
@ -18,10 +18,12 @@ extern unsigned char _tbss_end[] __attribute__((__weak__));
 extern unsigned char _tls_align[] __attribute__((__weak__));
 extern unsigned char __test_start[] __attribute__((__weak__));
 extern unsigned char __ro[] __attribute__((__weak__));
-extern uint8_t __data_start[] __attribute__((__weak__));
-extern uint8_t __data_end[] __attribute__((__weak__));
-extern uint8_t __bss_start[] __attribute__((__weak__));
-extern uint8_t __bss_end[] __attribute__((__weak__));
+extern unsigned char __data_start[] __attribute__((__weak__));
+extern unsigned char __data_end[] __attribute__((__weak__));
+extern unsigned char __bss_start[] __attribute__((__weak__));
+extern unsigned char __bss_end[] __attribute__((__weak__));
+extern unsigned long __got_start[] __attribute__((__weak__));
+extern unsigned long __got_end[] __attribute__((__weak__));
 extern unsigned char ape_phdrs[] __attribute__((__weak__));

 COSMOPOLITAN_C_END_
--- a/build/bootstrap/ape.aarch64
+++ b/build/bootstrap/ape.aarch64
--- a/build/bootstrap/compile.com
+++ b/build/bootstrap/compile.com
--- a/build/bootstrap/fixupobj.com
+++ b/build/bootstrap/fixupobj.com
--- a/build/bootstrap/gcc-only-flags.txt
+++ b/build/bootstrap/gcc-only-flags.txt
@ -0,0 +1,58 @@
+--nocompress-debug-sections
+--noexecstack
+-Wa,--nocompress-debug-sections
+-Wa,--noexecstack
+-Wa,-msse2avx
+-Werror=maybe-uninitialized
+-Wno-literal-suffix
+-Wno-unused-but-set-variable
+-Wunsafe-loop-optimizations
+-fbranch-target-load-optimize
+-fcx-limited-range
+-fdelete-dead-exceptions
+-femit-struct-debug-baseonly
+-ffp-int-builtin-inexact
+-finline-functions-called-once
+-fipa-pta
+-fivopts
+-flimit-function-alignment
+-fmerge-constants
+-fmodulo-sched
+-fmodulo-sched-allow-regmoves
+-fno-align-jumps
+-fno-align-labels
+-fno-align-loops
+-fno-code-hoisting
+-fno-cx-limited-range
+-fno-fp-int-builtin-inexact
+-fno-gnu-unique
+-fno-inline-functions-called-once
+-fno-instrument-functions
+-fno-schedule-insns2
+-fno-whole-program
+-fopt-info-vec
+-fopt-info-vec-missed
+-freg-struct-return
+-freschedule-modulo-scheduled-loops
+-frounding-math
+-fsched2-use-superblocks
+-fschedule-insns
+-fschedule-insns2
+-fshrink-wrap
+-fshrink-wrap-separate
+-fsignaling-nans
+-fstack-clash-protection
+-ftracer
+-ftrapv
+-ftree-loop-im
+-ftree-loop-vectorize
+-funsafe-loop-optimizations
+-fversion-loops-for-strides
+-fwhole-program
+-gdescribe-dies
+-gstabs
+-mcall-ms2sysv-xlogues
+-mdispatch-scheduler
+-mfpmath=sse+387
+-mmitigate-rop
+-mno-fentry
--- a/build/bootstrap/package.com
+++ b/build/bootstrap/package.com
--- a/build/definitions.mk
+++ b/build/definitions.mk
@ -54,7 +54,7 @@
 #

 ifeq ($(LANDLOCKMAKE_VERSION),)
-TMPSAFE = $(join $(TMPDIR),$(subst /,_,$@)).tmp
+TMPSAFE = $(join $(TMPDIR)/,$(subst /,_,$@)).tmp
 else
 TMPSAFE = $(TMPDIR)/
 endif
@ -93,9 +93,9 @@ DEFAULT_CCFLAGS +=							\
 	-frecord-gcc-switches

 DEFAULT_COPTS ?=							\
-	-fno-math-errno							\
 	-fno-ident							\
 	-fno-common							\
+	-fno-math-errno							\
 	-fno-gnu-unique							\
 	-fstrict-aliasing						\
 	-fstrict-overflow						\
@ -138,6 +138,7 @@ MATHEMATICAL =								\
 DEFAULT_CPPFLAGS +=							\
 	-D_COSMO_SOURCE							\
 	-DMODE='"$(MODE)"'						\
+	-Wno-unknown-pragmas						\
 	-nostdinc							\
 	-iquote.							\
 	-isystem libc/isystem
--- a/build/htags
+++ b/build/htags
@ -55,7 +55,7 @@ set -- --regex-c='/_Atomic(\([^)]*\))/\1/b' "$@"
 set -- --regex-c='/^\(\(hidden\|extern\|const\) \)*[_[:alpha:]][_[:alnum:]]*[ *][ *]*\([_[:alpha:]][_[:alnum:]]*[ *][ *]*\)*\([_[:alpha:]][_$[:alnum:]]*\)/\4/b' "$@"

 # ctags doesn't understand function prototypes, e.g.
-#   bool isheap(void *p) dontthrow nocallback;
+#   bool isheap(void *p) dontthrow dontcallback;
 set -- --regex-c='/^[_[:alpha:]][_[:alnum:]]*[ *][ *]*\([_[:alpha:]][_[:alnum:]]*[ *][ *]*\)*\([_[:alpha:]][_$[:alnum:]]*\)(.*/\2/b' "$@"

 # ctags doesn't understand function pointers, e.g.
--- a/build/online.mk
+++ b/build/online.mk
@ -23,7 +23,8 @@
 #   - tool/build/runitd.c

 .PRECIOUS: o/$(MODE)/%.com.ok
-o/$(MODE)/%.com.ok: private .PLEDGE = stdio rpath wpath cpath proc fattr inet
+o/$(MODE)/%.com.ok: private .PLEDGE = stdio rpath wpath cpath proc fattr inet dns
+o/$(MODE)/%.com.ok: private .UNVEIL += r:/etc/resolv.conf
 o/$(MODE)/%.com.ok:				\
 		o/$(MODE)/tool/build/runit.com	\
 		o/$(MODE)/tool/build/runitd.com	\
--- a/build/rules.mk
+++ b/build/rules.mk
@ -39,6 +39,7 @@ o/$(MODE)/%.h: %.c

 o/$(MODE)/%.o: %.cc
 	@$(COMPILE) -AOBJECTIFY.cxx $(OBJECTIFY.cxx) $(OUTPUT_OPTION) $<
+	@$(COMPILE) -AFIXUPOBJ -wT$@ $(FIXUPOBJ) $@

 o/$(MODE)/%.o: %.cpp
 	@$(COMPILE) -AOBJECTIFY.cxx $(OBJECTIFY.cxx) $(OUTPUT_OPTION) $<
--- a/examples/BUILD.mk
+++ b/examples/BUILD.mk
@ -85,6 +85,7 @@ EXAMPLES_DIRECTDEPS =								\
 	THIRD_PARTY_MUSL							\
 	THIRD_PARTY_NSYNC							\
 	THIRD_PARTY_NSYNC_MEM							\
+	THIRD_PARTY_OPENMP							\
 	THIRD_PARTY_SED								\
 	THIRD_PARTY_STB								\
 	THIRD_PARTY_TR								\
@ -153,6 +154,7 @@ o/$(MODE)/examples/picol.com.dbg:				\
 	@$(APELINK)

 o/$(MODE)/usr/share/dict/words.zip.o: private ZIPOBJ_FLAGS += -C2
+o/$(MODE)/examples/wut.o: private COPTS += -fopenmp

 $(EXAMPLES_OBJS): examples/BUILD.mk

--- a/examples/system.c
+++ b/examples/system.c
@ -7,6 +7,7 @@
 │   • http://creativecommons.org/publicdomain/zero/1.0/            │
 ╚─────────────────────────────────────────────────────────────────*/
 #endif
+#include "libc/calls/calls.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"

--- a/examples/unbourne.c
+++ b/examples/unbourne.c
@ -2569,8 +2569,7 @@ static int shlex() {
      case 'y':
      case 'z':
        p = buf;
-        while (buf++, is_in_name(*buf))
-          ;
+        while (buf++, is_in_name(*buf));
        yylval.name = stalloc(buf - p + 1);
        *(char *)mempcpy(yylval.name, p, buf - p) = 0;
        value = ARITH_VAR;
@ -2994,7 +2993,7 @@ static const char *updatepwd(const char *dir) {
  lim = (char *)stackblock() + 1;
  if (*dir != '/') {
    if (new[-1] != '/') USTPUTC('/', new);
-    if (new > lim &&*lim == '/') lim++;
+    if (new > lim && *lim == '/') lim++;
  } else {
    USTPUTC('/', new);
    cdcomppath++;
@ -6565,6 +6564,10 @@ struct job *makejob(union node *node, int nprocs) {
  return jp;
 }

+#if defined(__GNUC__) && __GNUC__ >= 12
+#pragma GCC diagnostic ignored "-Wuse-after-free"
+#endif
+
 static struct job *growjobtab(void) {
  unsigned len;
  long offset;
@ -7446,8 +7449,7 @@ static int ulimitcmd(int argc, char **argv) {
        what = optc;
    }
  }
-  for (l = limits; l->option != what; l++)
-    ;
+  for (l = limits; l->option != what; l++);
  set = *argptr ? 1 : 0;
  if (set) {
    char *p = *argptr;
@ -7660,8 +7662,7 @@ static void setparam(char **argv) {
  char **newparam;
  char **ap;
  int nparam;
-  for (nparam = 0; argv[nparam]; nparam++)
-    ;
+  for (nparam = 0; argv[nparam]; nparam++);
  ap = newparam = ckmalloc((nparam + 1) * sizeof *ap);
  while (*argv) {
    *ap++ = savestr(*argv++);
@ -7701,8 +7702,7 @@ static int shiftcmd(int argc, char **argv) {
    if (shellparam.malloc) ckfree(*ap1);
  }
  ap2 = shellparam.p;
-  while ((*ap2++ = *ap1++) != NULL)
-    ;
+  while ((*ap2++ = *ap1++) != NULL);
  shellparam.optind = 1;
  shellparam.optoff = -1;
  INTON;
@ -8308,8 +8308,7 @@ static void parsefname(void) {
    if (heredoclist == NULL)
      heredoclist = here;
    else {
-      for (p = heredoclist; p->next; p = p->next)
-        ;
+      for (p = heredoclist; p->next; p = p->next);
      p->next = here;
    }
  } else if (n->type == NTOFD || n->type == NFROMFD) {
@ -8432,8 +8431,7 @@ static int xxreadtoken(void) {
      case '\t':
        continue;
      case '#':
-        while ((c = pgetc()) != '\n' && c != PEOF)
-          ;
+        while ((c = pgetc()) != '\n' && c != PEOF);
        pungetc();
        continue;
      case '\n':
@ -8553,7 +8551,7 @@ static int readtoken1(int firstc, char const *syntax, char *eofmark,
  quotef = 0;
  bqlist = NULL;
  STARTSTACKSTR(out);
-loop : {                   /* for each line, until end of word */
+loop: {                    /* for each line, until end of word */
  CHECKEND();              /* set c to PEOF if at end of here document */
  for (;;) {               /* until end of line or end of word */
    CHECKSTRSPACE(4, out); /* permit 4 calls to USTPUTC */
@ -8701,7 +8699,7 @@ endword:
   * is called, c is set to the first character of the next input line.  If
   * we are at the end of the here document, this routine sets the c to PEOF.
   */
-checkend : {
+checkend: {
  if (realeofmark(eofmark)) {
    int markloc;
    char *p;
@ -8742,7 +8740,7 @@ checkend : {
   * specifying the fd to be redirected.  The variable "c" contains the
   * first character of the redirection operator.
   */
-parseredir : {
+parseredir: {
  char fd = *out;
  union node *np;
  np = (union node *)stalloc(sizeof(struct nfile));
@ -8798,7 +8796,7 @@ parseredir : {
   * Parse a substitution.  At this point, we have read the dollar sign
   * and nothing else.
   */
-parsesub : {
+parsesub: {
  int subtype;
  int typeloc;
  char *p;
@ -8910,7 +8908,7 @@ parsesub : {
   * list of commands (passed by reference), and savelen is the number of
   * characters on the top of the stack which must be preserved.
   */
-parsebackq : {
+parsebackq: {
  struct nodelist **nlpp;
  union node *n;
  char *str;
@ -9002,7 +9000,7 @@ parsebackq : {
 /*
 * Parse an arithmetic expansion (indicate start of one and set state)
 */
-parsearith : {
+parsearith: {
  synstack_push(&synstack, synstack->prev ?: alloca(sizeof(*synstack)),
                ARISYNTAX);
  synstack->dblquote = 1;
--- a/libc/calls/BUILD.mk
+++ b/libc/calls/BUILD.mk
@ -41,6 +41,7 @@ LIBC_CALLS_A_DIRECTDEPS =				\
 	LIBC_INTRIN					\
 	LIBC_NEXGEN32E					\
 	LIBC_NT_ADVAPI32				\
+	LIBC_NT_BCRYPTPRIMITIVES			\
 	LIBC_NT_IPHLPAPI				\
 	LIBC_NT_KERNEL32				\
 	LIBC_NT_NTDLL					\
@ -132,7 +133,8 @@ endif
 o/$(MODE)/libc/calls/pledge-linux.o: private		\
 		CFLAGS +=				\
 			-Os				\
-			-fPIC
+			-fPIC				\
+			-ffreestanding

 # these assembly files are safe to build on aarch64
 o/$(MODE)/libc/calls/getcontext.o: libc/calls/getcontext.S
--- a/libc/calls/calls.h
+++ b/libc/calls/calls.h
@ -247,6 +247,8 @@ ssize_t tinyprint(int, const char *, ...) libcesque nullterminated();
 void shm_path_np(const char *, char[hasatleast 78]) libcesque;
 #endif /* _COSMO_SOURCE */

+int system(const char *) libcesque;
+
 int __wifstopped(int) libcesque pureconst;
 int __wifcontinued(int) libcesque pureconst;
 int __wifsignaled(int) libcesque pureconst;
--- a/libc/calls/clock_gettime-nt.c
+++ b/libc/calls/clock_gettime-nt.c
@ -21,12 +21,17 @@
 #include "libc/dce.h"
 #include "libc/errno.h"
 #include "libc/fmt/wintime.internal.h"
+#include "libc/nt/accounting.h"
+#include "libc/nt/runtime.h"
 #include "libc/nt/synchronization.h"
+#include "libc/nt/thread.h"

-#define _CLOCK_REALTIME        0
-#define _CLOCK_MONOTONIC       1
-#define _CLOCK_REALTIME_COARSE 2
-#define _CLOCK_BOOTTIME        3
+#define _CLOCK_REALTIME           0
+#define _CLOCK_MONOTONIC          1
+#define _CLOCK_REALTIME_COARSE    2
+#define _CLOCK_BOOTTIME           3
+#define _CLOCK_PROCESS_CPUTIME_ID 4
+#define _CLOCK_THREAD_CPUTIME_ID  5

 static struct {
  uint64_t base;
@ -35,7 +40,7 @@ static struct {

 textwindows int sys_clock_gettime_nt(int clock, struct timespec *ts) {
  uint64_t t;
-  struct NtFileTime ft;
+  struct NtFileTime ft, ftExit, ftUser, ftKernel, ftCreation;
  switch (clock) {
    case _CLOCK_REALTIME:
      if (ts) {
@ -61,6 +66,22 @@ textwindows int sys_clock_gettime_nt(int clock, struct timespec *ts) {
        *ts = timespec_frommillis(GetTickCount64());
      }
      return 0;
+    case _CLOCK_PROCESS_CPUTIME_ID:
+      if (ts) {
+        GetProcessTimes(GetCurrentProcess(), &ftCreation, &ftExit, &ftKernel,
+                        &ftUser);
+        *ts = WindowsDurationToTimeSpec(ReadFileTime(ftUser) +
+                                        ReadFileTime(ftKernel));
+      }
+      return 0;
+    case _CLOCK_THREAD_CPUTIME_ID:
+      if (ts) {
+        GetThreadTimes(GetCurrentThread(), &ftCreation, &ftExit, &ftKernel,
+                       &ftUser);
+        *ts = WindowsDurationToTimeSpec(ReadFileTime(ftUser) +
+                                        ReadFileTime(ftKernel));
+      }
+      return 0;
    default:
      return -EINVAL;
  }
--- a/libc/calls/clock_gettime.c
+++ b/libc/calls/clock_gettime.c
@ -61,24 +61,13 @@ static int __clock_gettime_init(int clockid, struct timespec *ts) {
 /**
 * Returns nanosecond time.
 *
- * @param clock can be one of:
- *    - `CLOCK_REALTIME`: universally supported
- *    - `CLOCK_REALTIME_FAST`: ditto but faster on freebsd
- *    - `CLOCK_REALTIME_PRECISE`: ditto but better on freebsd
- *    - `CLOCK_REALTIME_COARSE`: : like `CLOCK_REALTIME_FAST` w/ Linux 2.6.32+
- *    - `CLOCK_MONOTONIC`: universally supported (except on XNU/NT w/o INVTSC)
- *    - `CLOCK_MONOTONIC_FAST`: ditto but faster on freebsd
- *    - `CLOCK_MONOTONIC_PRECISE`: ditto but better on freebsd
- *    - `CLOCK_MONOTONIC_COARSE`: : like `CLOCK_MONOTONIC_FAST` w/ Linux 2.6.32+
- *    - `CLOCK_MONOTONIC_RAW`: is actually monotonic but needs Linux 2.6.28+
- *    - `CLOCK_PROCESS_CPUTIME_ID`: linux and bsd (NetBSD permits OR'd PID)
- *    - `CLOCK_THREAD_CPUTIME_ID`: linux and bsd (NetBSD permits OR'd TID)
- *    - `CLOCK_MONOTONIC_COARSE`: linux, freebsd
- *    - `CLOCK_PROF`: linux and netbsd
- *    - `CLOCK_BOOTTIME`: linux and openbsd
- *    - `CLOCK_REALTIME_ALARM`: linux-only
- *    - `CLOCK_BOOTTIME_ALARM`: linux-only
- *    - `CLOCK_TAI`: linux-only
+ * @param clock supports the following values across OSes:
+ *    - `CLOCK_REALTIME`
+ *    - `CLOCK_MONOTONIC`
+ *    - `CLOCK_REALTIME_COARSE`
+ *    - `CLOCK_MONOTONIC_COARSE`
+ *    - `CLOCK_THREAD_CPUTIME_ID`
+ *    - `CLOCK_PROCESS_CPUTIME_ID`
 * @param ts is where the result is stored (or null to do clock check)
 * @return 0 on success, or -1 w/ errno
 * @raise EFAULT if `ts` points to invalid memory
--- a/libc/calls/close.c
+++ b/libc/calls/close.c
@ -93,7 +93,7 @@ static int close_impl(int fd) {
 */
 int close(int fd) {
  int rc;
-  if (__isfdkind(fd, kFdZip)) {   // XXX IsWindows()?
+  if (__isfdkind(fd, kFdZip)) {  // XXX IsWindows()?
    BLOCK_SIGNALS;
    __fds_lock();
    rc = close_impl(fd);
--- a/libc/calls/getrandom.c
+++ b/libc/calls/getrandom.c
@ -103,7 +103,7 @@ static ssize_t GetDevUrandom(char *p, size_t n) {
 ssize_t __getrandom(void *p, size_t n, unsigned f) {
  ssize_t rc;
  if (IsWindows()) {
-    rc = RtlGenRandom(p, n) ? n : __winerr();
+    rc = ProcessPrng(p, n) ? n : __winerr();
  } else if (have_getrandom) {
    if (IsXnu() || IsOpenbsd()) {
      rc = GetRandomBsd(p, n, GetRandomEntropy);
@ -131,7 +131,7 @@ ssize_t __getrandom(void *p, size_t n, unsigned f) {
 *
 * This random number seed generator obtains information from:
 *
- * - RtlGenRandom() on Windows
+ * - ProcessPrng() on Windows
 * - getentropy() on XNU and OpenBSD
 * - getrandom() on Linux, FreeBSD, and NetBSD
 * - sysctl(KERN_ARND) on older versions of FreeBSD and NetBSD
--- a/libc/calls/metalfile.c
+++ b/libc/calls/metalfile.c
@ -75,7 +75,9 @@ textstartup void InitializeMetalFile(void) {
    memcpy(copied_base, (void *)(BANE + IMAGE_BASE_PHYSICAL), size);
    __ape_com_base = copied_base;
    __ape_com_size = size;
-    KINFOF("%s @ %p,+%#zx", APE_COM_NAME, copied_base, size);
+    // TODO(tkchia): LIBC_CALLS doesn't depend on LIBC_VGA so references
+    //               to its functions need to be weak
+    // KINFOF("%s @ %p,+%#zx", APE_COM_NAME, copied_base, size);
  }
 }

--- a/libc/calls/rdrand.c
+++ b/libc/calls/rdrand.c
@ -52,7 +52,7 @@ static dontinline uint64_t rdrand_failover(void) {
 *
 * If RDRAND isn't available (we check CPUID and we also disable it
 * automatically for microarchitectures where it's slow or buggy) then
- * we try getrandom(), RtlGenRandom(), or sysctl(KERN_ARND). If those
+ * we try getrandom(), ProcessPrng(), or sysctl(KERN_ARND). If those
 * aren't available then we try /dev/urandom and if that fails, we try
 * getauxval(AT_RANDOM), and if not we finally use RDTSC and getpid().
 *
--- a/libc/calls/read-nt.c
+++ b/libc/calls/read-nt.c
@ -157,6 +157,8 @@ static textwindows struct Keystroke *NewKeystroke(void) {
  struct Keystroke *k = KEYSTROKE_CONTAINER(e);
  dll_remove(&__keystroke.free, &k->elem);
  --__keystroke.freekeys;
+  // TODO(jart): What's wrong with GCC 12.3?
+  asm("" : "+r"(k));
  k->buflen = 0;
  return k;
 }
--- a/libc/calls/sched_getcpu.c
+++ b/libc/calls/sched_getcpu.c
@ -19,15 +19,19 @@
 #include "libc/calls/calls.h"
 #include "libc/calls/struct/cpuset.h"
 #include "libc/dce.h"
+#include "libc/errno.h"
 #include "libc/nexgen32e/rdtscp.h"
 #include "libc/nexgen32e/x86feature.h"
 #include "libc/nt/struct/processornumber.h"
 #include "libc/nt/synchronization.h"
+#include "libc/runtime/syslib.internal.h"
+#include "libc/sysv/errfuns.h"

 int sys_getcpu(unsigned *opt_cpu, unsigned *opt_node, void *tcache);

 /**
 * Returns ID of CPU on which thread is currently scheduled.
+ * @return cpu number on success, or -1 w/ errno
 */
 int sched_getcpu(void) {
  if (X86_HAVE(RDTSCP)) {
@ -38,6 +42,19 @@ int sched_getcpu(void) {
    struct NtProcessorNumber pn;
    GetCurrentProcessorNumberEx(&pn);
    return 64 * pn.Group + pn.Number;
+  } else if (IsXnuSilicon()) {
+    if (__syslib->__version >= 9) {
+      size_t cpu;
+      errno_t err = __syslib->__pthread_cpu_number_np(&cpu);
+      if (!err) {
+        return cpu;
+      } else {
+        errno = err;
+        return -1;
+      }
+    } else {
+      return enosys();
+    }
  } else {
    unsigned cpu = 0;
    int rc = sys_getcpu(&cpu, 0, 0);
--- a/libc/calls/sig.c
+++ b/libc/calls/sig.c
@ -441,8 +441,7 @@ textwindows void __sig_generate(int sig, int sic) {
    // to unblock our sig once the wait operation is completed; when
    // that's the case we can cancel the thread's i/o to deliver sig
    if (atomic_load_explicit(&pt->pt_blocker, memory_order_acquire) &&
-        !(atomic_load_explicit(&pt->pt_blkmask, memory_order_relaxed) &
-          (1ull << (sig - 1)))) {
+        !(pt->pt_blkmask & (1ull << (sig - 1)))) {
      _pthread_ref(pt);
      mark = pt;
      break;
--- a/libc/calls/syscall_support-nt.internal.h
+++ b/libc/calls/syscall_support-nt.internal.h
@ -18,7 +18,7 @@ int sys_fcntl_nt_setfl(int, unsigned);
 int sys_pause_nt(void);
 int64_t __fix_enotdir(int64_t, char16_t *);
 int64_t __fix_enotdir3(int64_t, char16_t *, char16_t *);
-int64_t __winerr(void) nocallback privileged;
+int64_t __winerr(void) dontcallback privileged;
 int64_t ntreturn(uint32_t);
 void *GetProcAddressModule(const char *, const char *);
 void WinMainForked(void);
--- a/libc/calls/ucontext.h
+++ b/libc/calls/ucontext.h
@ -130,7 +130,7 @@ typedef struct ucontext ucontext_t;
 int getcontext(ucontext_t *) dontthrow;
 int setcontext(const ucontext_t *) dontthrow;
 int swapcontext(ucontext_t *, const ucontext_t *) dontthrow returnstwice;
-void makecontext(ucontext_t *, void (*)(), int, ...) dontthrow nocallback;
+void makecontext(ucontext_t *, void *, int, ...) dontthrow dontcallback;
 void __sig_restore(const ucontext_t *) wontreturn;

 COSMOPOLITAN_C_END_
--- a/libc/calls/uname.c
+++ b/libc/calls/uname.c
@ -82,15 +82,27 @@ static textwindows void GetNtName(char *name, int kind) {
 }

 static inline textwindows int GetNtMajorVersion(void) {
+#ifdef __x86_64__
  return NtGetPeb()->OSMajorVersion;
+#else
+  return 0;
+#endif
 }

 static inline textwindows int GetNtMinorVersion(void) {
+#ifdef __x86_64__
  return NtGetPeb()->OSMinorVersion;
+#else
+  return 0;
+#endif
 }

 static inline textwindows int GetNtBuildNumber(void) {
+#ifdef __x86_64__
  return NtGetPeb()->OSBuildNumber;
+#else
+  return 0;
+#endif
 }

 static textwindows void GetNtVersion(char *p) {
--- a/libc/cosmo.h
+++ b/libc/cosmo.h
@ -4,6 +4,7 @@ COSMOPOLITAN_C_START_

 errno_t cosmo_once(_Atomic(uint32_t) *, void (*)(void));
 int systemvpe(const char *, char *const[], char *const[]) libcesque;
+char *GetProgramExecutableName(void);

 COSMOPOLITAN_C_END_
 #endif /* COSMOPOLITAN_LIBC_COSMO_H_ */
--- a/libc/integral/c.inc
+++ b/libc/integral/c.inc
@ -159,7 +159,7 @@ typedef struct {
 #include "libc/integral/lp64arg.inc"
 #endif

-#define libcesque   dontthrow nocallback
+#define libcesque   dontthrow dontcallback
 #define memcpyesque libcesque
 #define strlenesque libcesque nosideeffect paramsnonnull()
 #define vallocesque \
@ -364,14 +364,14 @@ typedef struct {
 #endif
 #endif

-#ifndef nocallback
+#ifndef dontcallback
 #if !defined(__STRICT_ANSI__) &&  \
    (__has_attribute(__leaf__) || \
     (!defined(__llvm__) &&       \
      (__GNUC__ + 0) * 100 + (__GNUC_MINOR__ + 0) >= 406))
-#define nocallback __attribute__((__leaf__))
+#define dontcallback __attribute__((__leaf__))
 #else
-#define nocallback
+#define dontcallback
 #endif
 #endif

@ -645,11 +645,23 @@ void abort(void) wontreturn;
 #define initarray _Section(".init_array")
 #endif

-#pragma GCC diagnostic ignored "-Wformat"                /* todo: patch gcc */
+#ifndef __llvm__
+#pragma GCC diagnostic ignored "-Wformat=0" /* todo: patch gcc */
+#pragma GCC diagnostic ignored "-Wbuiltin-declaration-mismatch"
+#pragma GCC diagnostic warning "-Wunknown-pragmas"
+#else
+#pragma GCC diagnostic ignored "-Wformat"
+#pragma GCC diagnostic ignored "-Wconstant-logical-operand" /* what */
+#pragma GCC diagnostic ignored "-Wunknown-warning-option"
+#pragma GCC diagnostic ignored "-Wunknown-pragmas"
+#pragma GCC diagnostic ignored "-Wstring-plus-int"       /* features 4 losers */
+#pragma GCC diagnostic ignored "-Wkeyword-compat"        /* c++ upgrade */
+#pragma GCC diagnostic ignored "-Wuser-defined-literals" /* reserved for me */
+#endif
+
 #pragma GCC diagnostic ignored "-Wformat-extra-args"     /* todo: patch gcc */
 #pragma GCC diagnostic ignored "-Wunused-function"       /* contradicts dce */
 #pragma GCC diagnostic ignored "-Wunused-const-variable" /* sooo ridiculous */
-#pragma GCC diagnostic ignored "-Wbuiltin-declaration-mismatch"
 #ifndef __cplusplus
 #pragma GCC diagnostic ignored "-Wold-style-definition" /* orwellian bullsh */
 #endif
@ -745,5 +757,18 @@ void abort(void) wontreturn;
 #define __funline static inline
 #endif

+#if defined(__x86_64__) && (defined(__GNUC__) || defined(__llvm__)) && \
+    !defined(__chibicc__) && 0 /* TODO: enable with toolchain upgrade */
+#define __target_clones(x) __attribute__((__target_clones__(x ",default")))
+#else
+#define __target_clones(x)
+#endif
+
+#if !defined(TINY) && !defined(__AVX__) && 0
+#define __vex __target_clones("avx")
+#else
+#define __vex
+#endif
+
 #define MACHINE_CODE_ANALYSIS_BEGIN_
 #define MACHINE_CODE_ANALYSIS_END_
--- a/libc/intrin/BUILD.mk
+++ b/libc/intrin/BUILD.mk
@ -86,6 +86,11 @@ o/$(MODE)/libc/intrin/memmove.o: private		\
 		CFLAGS +=				\
 			-fpie

+o/$(MODE)/libc/intrin/x86.o: private			\
+		CFLAGS +=				\
+			-ffreestanding			\
+			-fno-jump-tables
+
 # these assembly files are safe to build on aarch64
 o/$(MODE)/libc/intrin/aarch64/%.o: libc/intrin/aarch64/%.S
 	@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
--- a/libc/runtime/fesetround.c
+++ b/libc/runtime/fesetround.c
--- a/libc/intrin/kprintf.greg.c
+++ b/libc/intrin/kprintf.greg.c
@ -24,7 +24,6 @@
 #include "libc/fmt/magnumstrs.internal.h"
 #include "libc/intrin/asmflag.h"
 #include "libc/intrin/atomic.h"
-#include "libc/serialize.h"
 #include "libc/intrin/getenv.internal.h"
 #include "libc/intrin/likely.h"
 #include "libc/intrin/nomultics.internal.h"
@ -46,6 +45,7 @@
 #include "libc/runtime/memtrack.internal.h"
 #include "libc/runtime/runtime.h"
 #include "libc/runtime/symbols.internal.h"
+#include "libc/serialize.h"
 #include "libc/stdckdint.h"
 #include "libc/str/str.h"
 #include "libc/str/tab.internal.h"
--- a/libc/intrin/memchr.c
+++ b/libc/intrin/memchr.c
@ -67,10 +67,9 @@ static inline const unsigned char *memchr_sse(const unsigned char *s,
 * @return is pointer to first instance of c or NULL if not found
 * @asyncsignalsafe
 */
-void *memchr(const void *s, int c, size_t n) {
+__vex void *memchr(const void *s, int c, size_t n) {
 #if defined(__x86_64__) && !defined(__chibicc__)
  const void *r;
-  if (IsAsan()) __asan_verify(s, n);
  r = memchr_sse(s, c, n);
  return (void *)r;
 #else
--- a/libc/intrin/memmove.c
+++ b/libc/intrin/memmove.c
@ -86,7 +86,7 @@ typedef long long xmm_a __attribute__((__vector_size__(16), __aligned__(16)));
 * @return dst
 * @asyncsignalsafe
 */
-void *memmove(void *dst, const void *src, size_t n) {
+__vex void *memmove(void *dst, const void *src, size_t n) {
  char *d;
  size_t i;
  const char *s;
--- a/libc/intrin/memrchr.c
+++ b/libc/intrin/memrchr.c
@ -67,7 +67,7 @@ static inline const unsigned char *memrchr_sse(const unsigned char *s,
 * @return is pointer to first instance of c or NULL if not found
 * @asyncsignalsafe
 */
-void *memrchr(const void *s, int c, size_t n) {
+__vex void *memrchr(const void *s, int c, size_t n) {
 #if defined(__x86_64__) && !defined(__chibicc__)
  const void *r;
  r = memrchr_sse(s, c, n);
--- a/libc/intrin/mman.greg.c
+++ b/libc/intrin/mman.greg.c
@ -44,14 +44,16 @@
 #include "libc/runtime/runtime.h"
 #ifdef __x86_64__

-#define INVERT(x) (BANE + PHYSICAL(x))
-#define NOPAGE    ((uint64_t)-1)
+#define INVERT(x) (BANE + PHYSICAL((uintptr_t)(x)))
+#define NOPAGE    ((uint64_t) - 1)

-#define ABS64(x)                                     \
-  ({                                                 \
-    int64_t vAddr;                                   \
-    __asm__("movabs\t%1,%0" : "=r"(vAddr) : "i"(x)); \
-    vAddr;                                           \
+#define APE_STACK_VADDR                   \
+  ({                                      \
+    int64_t vAddr;                        \
+    __asm__(".weak\tape_stack_vaddr\n\t"  \
+            "movabs\t$ape_stack_vaddr,%0" \
+            : "=r"(vAddr));               \
+    vAddr;                                \
  })

 struct ReclaimedPage {
@ -305,7 +307,6 @@ textreal void __map_phdrs(struct mman *mm, uint64_t *pml4t, uint64_t b,
  extern char ape_phdrs_end[] __attribute__((__weak__));
  extern char ape_stack_pf[] __attribute__((__weak__));
  extern char ape_stack_offset[] __attribute__((__weak__));
-  extern char ape_stack_vaddr[] __attribute__((__weak__));
  extern char ape_stack_filesz[] __attribute__((__weak__));
  extern char ape_stack_memsz[] __attribute__((__weak__));
  __setup_mman(mm, pml4t, top);
@ -318,7 +319,7 @@ textreal void __map_phdrs(struct mman *mm, uint64_t *pml4t, uint64_t b,
                     .p_type = PT_LOAD,
                     .p_flags = (uintptr_t)ape_stack_pf,
                     .p_offset = (uintptr_t)ape_stack_offset,
-                     .p_vaddr = ABS64(ape_stack_vaddr),
+                     .p_vaddr = APE_STACK_VADDR,
                     .p_filesz = (uintptr_t)ape_stack_filesz,
                     .p_memsz = (uintptr_t)ape_stack_memsz,
                 });
--- a/libc/intrin/reservefd.c
+++ b/libc/intrin/reservefd.c
@ -27,8 +27,6 @@
 #include "libc/str/str.h"
 #include "libc/sysv/consts/map.h"

-static volatile size_t mapsize;
-
 /**
 * Grows file descriptor array memory if needed.
 *
--- a/libc/intrin/segmentation.h
+++ b/libc/intrin/segmentation.h
@ -1,24 +0,0 @@
-#ifndef COSMOPOLITAN_LIBC_BITS_SEGMENTATION_H_
-#define COSMOPOLITAN_LIBC_BITS_SEGMENTATION_H_
-#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
-#ifdef _COSMO_SOURCE
-
-/**
- * Reads scalar from memory, offset by segment.
- *
- * @return *(MEM) relative to segment
- * @see pushpop()
- */
-#define fs(MEM) __peek("fs", MEM)
-#define gs(MEM) __peek("gs", MEM)
-
-#define __peek(SEGMENT, ADDRESS)                                  \
-  ({                                                              \
-    typeof(*(ADDRESS)) Pk;                                        \
-    asm("mov\t%%" SEGMENT ":%1,%0" : "=r"(Pk) : "m"(*(ADDRESS))); \
-    Pk;                                                           \
-  })
-
-#endif /* _COSMO_SOURCE */
-#endif /* __GNUC__ && !__STRICT_ANSI__ */
-#endif /* COSMOPOLITAN_LIBC_BITS_SEGMENTATION_H_ */
--- a/libc/intrin/stpcpy.c
+++ b/libc/intrin/stpcpy.c
@ -33,7 +33,7 @@ typedef char xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
 * @return pointer to nul byte
 * @asyncsignalsafe
 */
-char *stpcpy(char *d, const char *s) {
+__vex char *stpcpy(char *d, const char *s) {
  size_t i = 0;
 #if defined(__x86_64__) && !defined(__chibicc__)
  for (; (uintptr_t)(s + i) & 15; ++i) {
--- a/libc/intrin/strchr.c
+++ b/libc/intrin/strchr.c
@ -94,7 +94,7 @@ static inline const char *strchr_x64(const char *p, uint64_t c) {
 * @asyncsignalsafe
 * @vforksafe
 */
-char *strchr(const char *s, int c) {
+__vex char *strchr(const char *s, int c) {
 #if defined(__x86_64__) && !defined(__chibicc__)
  const char *r;
  if (X86_HAVE(SSE)) {
--- a/libc/intrin/strchrnul.c
+++ b/libc/intrin/strchrnul.c
@ -92,7 +92,7 @@ static const char *strchrnul_x64(const char *p, uint64_t c) {
 * @return pointer to first instance of c, or pointer to
 *     NUL terminator if c is not found
 */
-char *strchrnul(const char *s, int c) {
+__vex char *strchrnul(const char *s, int c) {
 #if defined(__x86_64__) && !defined(__chibicc__)
  const char *r;
  if (X86_HAVE(SSE)) {
--- a/libc/intrin/strcpy.c
+++ b/libc/intrin/strcpy.c
@ -32,7 +32,7 @@ typedef char xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
 * @return original dest
 * @asyncsignalsafe
 */
-char *strcpy(char *d, const char *s) {
+__vex char *strcpy(char *d, const char *s) {
  size_t i = 0;
 #if defined(__x86_64__) && !defined(__chibicc__)
  for (; (uintptr_t)(s + i) & 15; ++i) {
--- a/libc/intrin/strlen.c
+++ b/libc/intrin/strlen.c
@ -37,7 +37,7 @@ size_t strlen(const char *s) {
  while (!m) m = __builtin_ia32_pmovmskb128(*++p == z);
  return (const char *)p + __builtin_ctzl(m) - s;
 #else
-#define ONES ((word)-1 / 255)
+#define ONES ((word) - 1 / 255)
 #define BANE (ONES * (255 / 2 + 1))
  typedef unsigned long mayalias word;
  word w;
@ -56,5 +56,4 @@ size_t strlen(const char *s) {
  return (const char *)p + (__builtin_ctzl(w) >> 3) - s;
 #endif
 }
-
 #endif /* __aarch64__ */
--- a/libc/intrin/x86.c
+++ b/libc/intrin/x86.c
@ -0,0 +1,808 @@
+//===-- cpu_model/x86.c - Support for __cpu_model builtin  --------*- C -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file is based on LLVM's lib/Support/Host.cpp.
+//  It implements the operating system Host concept and builtin
+//  __cpu_model for the compiler_rt library for x86.
+//
+//===----------------------------------------------------------------------===//
+#if defined(__x86_64__) && (defined(__GNUC__) || defined(__clang__))
+#include "libc/intrin/strace.internal.h"
+#include "third_party/compiler_rt/cpu_model.h"
+
+enum VendorSignatures {
+  SIG_INTEL = 0x756e6547,  // Genu
+  SIG_AMD = 0x68747541,    // Auth
+};
+
+enum ProcessorVendors {
+  VENDOR_INTEL = 1,
+  VENDOR_AMD,
+  VENDOR_OTHER,
+  VENDOR_MAX
+};
+
+enum ProcessorTypes {
+  INTEL_BONNELL = 1,
+  INTEL_CORE2,
+  INTEL_COREI7,
+  AMDFAM10H,
+  AMDFAM15H,
+  INTEL_SILVERMONT,
+  INTEL_KNL,
+  AMD_BTVER1,
+  AMD_BTVER2,
+  AMDFAM17H,
+  INTEL_KNM,
+  INTEL_GOLDMONT,
+  INTEL_GOLDMONT_PLUS,
+  INTEL_TREMONT,
+  AMDFAM19H,
+  ZHAOXIN_FAM7H,
+  INTEL_SIERRAFOREST,
+  INTEL_GRANDRIDGE,
+  INTEL_CLEARWATERFOREST,
+  CPU_TYPE_MAX
+};
+
+enum ProcessorSubtypes {
+  INTEL_COREI7_NEHALEM = 1,
+  INTEL_COREI7_WESTMERE,
+  INTEL_COREI7_SANDYBRIDGE,
+  AMDFAM10H_BARCELONA,
+  AMDFAM10H_SHANGHAI,
+  AMDFAM10H_ISTANBUL,
+  AMDFAM15H_BDVER1,
+  AMDFAM15H_BDVER2,
+  AMDFAM15H_BDVER3,
+  AMDFAM15H_BDVER4,
+  AMDFAM17H_ZNVER1,
+  INTEL_COREI7_IVYBRIDGE,
+  INTEL_COREI7_HASWELL,
+  INTEL_COREI7_BROADWELL,
+  INTEL_COREI7_SKYLAKE,
+  INTEL_COREI7_SKYLAKE_AVX512,
+  INTEL_COREI7_CANNONLAKE,
+  INTEL_COREI7_ICELAKE_CLIENT,
+  INTEL_COREI7_ICELAKE_SERVER,
+  AMDFAM17H_ZNVER2,
+  INTEL_COREI7_CASCADELAKE,
+  INTEL_COREI7_TIGERLAKE,
+  INTEL_COREI7_COOPERLAKE,
+  INTEL_COREI7_SAPPHIRERAPIDS,
+  INTEL_COREI7_ALDERLAKE,
+  AMDFAM19H_ZNVER3,
+  INTEL_COREI7_ROCKETLAKE,
+  ZHAOXIN_FAM7H_LUJIAZUI,
+  AMDFAM19H_ZNVER4,
+  INTEL_COREI7_GRANITERAPIDS,
+  INTEL_COREI7_GRANITERAPIDS_D,
+  INTEL_COREI7_ARROWLAKE,
+  INTEL_COREI7_ARROWLAKE_S,
+  INTEL_COREI7_PANTHERLAKE,
+  CPU_SUBTYPE_MAX
+};
+
+enum ProcessorFeatures {
+  FEATURE_CMOV = 0,
+  FEATURE_MMX,
+  FEATURE_POPCNT,
+  FEATURE_SSE,
+  FEATURE_SSE2,
+  FEATURE_SSE3,
+  FEATURE_SSSE3,
+  FEATURE_SSE4_1,
+  FEATURE_SSE4_2,
+  FEATURE_AVX,
+  FEATURE_AVX2,
+  FEATURE_SSE4_A,
+  FEATURE_FMA4,
+  FEATURE_XOP,
+  FEATURE_FMA,
+  FEATURE_AVX512F,
+  FEATURE_BMI,
+  FEATURE_BMI2,
+  FEATURE_AES,
+  FEATURE_PCLMUL,
+  FEATURE_AVX512VL,
+  FEATURE_AVX512BW,
+  FEATURE_AVX512DQ,
+  FEATURE_AVX512CD,
+  FEATURE_AVX512ER,
+  FEATURE_AVX512PF,
+  FEATURE_AVX512VBMI,
+  FEATURE_AVX512IFMA,
+  FEATURE_AVX5124VNNIW,
+  FEATURE_AVX5124FMAPS,
+  FEATURE_AVX512VPOPCNTDQ,
+  FEATURE_AVX512VBMI2,
+  FEATURE_GFNI,
+  FEATURE_VPCLMULQDQ,
+  FEATURE_AVX512VNNI,
+  FEATURE_AVX512BITALG,
+  FEATURE_AVX512BF16,
+  FEATURE_AVX512VP2INTERSECT,
+
+  FEATURE_CMPXCHG16B = 46,
+  FEATURE_F16C = 49,
+  FEATURE_LAHF_LM = 54,
+  FEATURE_LM,
+  FEATURE_WP,
+  FEATURE_LZCNT,
+  FEATURE_MOVBE,
+
+  FEATURE_AVX512FP16 = 94,
+  FEATURE_X86_64_BASELINE,
+  FEATURE_X86_64_V2,
+  FEATURE_X86_64_V3,
+  FEATURE_X86_64_V4,
+  CPU_FEATURE_MAX
+};
+
+// The check below for i386 was copied from clang's cpuid.h (__get_cpuid_max).
+// Check motivated by bug reports for OpenSSL crashing on CPUs without CPUID
+// support. Consequently, for i386, the presence of CPUID is checked first
+// via the corresponding eflags bit.
+static bool isCpuIdSupported(void) {
+  return true;
+}
+
+// This code is copied from lib/Support/Host.cpp.
+// Changes to either file should be mirrored in the other.
+
+/// getX86CpuIDAndInfo - Execute the specified cpuid and return the 4 values in
+/// the specified arguments.  If we can't run cpuid on the host, return true.
+static bool getX86CpuIDAndInfo(unsigned value, unsigned *rEAX, unsigned *rEBX,
+                               unsigned *rECX, unsigned *rEDX) {
+  // gcc doesn't know cpuid would clobber ebx/rbx. Preserve it manually.
+  // FIXME: should we save this for Clang?
+  __asm__("movq\t%%rbx, %%rsi\n\t"
+          "cpuid\n\t"
+          "xchgq\t%%rbx, %%rsi\n\t"
+          : "=a"(*rEAX), "=S"(*rEBX), "=c"(*rECX), "=d"(*rEDX)
+          : "a"(value));
+  return false;
+}
+
+/// getX86CpuIDAndInfoEx - Execute the specified cpuid with subleaf and return
+/// the 4 values in the specified arguments.  If we can't run cpuid on the host,
+/// return true.
+static bool getX86CpuIDAndInfoEx(unsigned value, unsigned subleaf,
+                                 unsigned *rEAX, unsigned *rEBX, unsigned *rECX,
+                                 unsigned *rEDX) {
+  // gcc doesn't know cpuid would clobber ebx/rbx. Preserve it manually.
+  // FIXME: should we save this for Clang?
+  __asm__("movq\t%%rbx, %%rsi\n\t"
+          "cpuid\n\t"
+          "xchgq\t%%rbx, %%rsi\n\t"
+          : "=a"(*rEAX), "=S"(*rEBX), "=c"(*rECX), "=d"(*rEDX)
+          : "a"(value), "c"(subleaf));
+  return false;
+}
+
+// Read control register 0 (XCR0). Used to detect features such as AVX.
+static bool getX86XCR0(unsigned *rEAX, unsigned *rEDX) {
+  // Check xgetbv; this uses a .byte sequence instead of the instruction
+  // directly because older assemblers do not include support for xgetbv and
+  // there is no easy way to conditionally compile based on the assembler used.
+  __asm__(".byte 0x0f, 0x01, 0xd0" : "=a"(*rEAX), "=d"(*rEDX) : "c"(0));
+  return false;
+}
+
+static void detectX86FamilyModel(unsigned EAX, unsigned *Family,
+                                 unsigned *Model) {
+  *Family = (EAX >> 8) & 0xf;  // Bits 8 - 11
+  *Model = (EAX >> 4) & 0xf;   // Bits 4 - 7
+  if (*Family == 6 || *Family == 0xf) {
+    if (*Family == 0xf)
+      // Examine extended family ID if family ID is F.
+      *Family += (EAX >> 20) & 0xff;  // Bits 20 - 27
+    // Examine extended model ID if family ID is 6 or F.
+    *Model += ((EAX >> 16) & 0xf) << 4;  // Bits 16 - 19
+  }
+}
+
+static const char *getIntelProcessorTypeAndSubtype(unsigned Family,
+                                                   unsigned Model,
+                                                   const unsigned *Features,
+                                                   unsigned *Type,
+                                                   unsigned *Subtype) {
+#define testFeature(F) (Features[F / 32] & (1 << (F % 32))) != 0
+
+  // We select CPU strings to match the code in Host.cpp, but we don't use them
+  // in compiler-rt.
+  const char *CPU = 0;
+
+  switch (Family) {
+    case 6:
+      switch (Model) {
+        case 0x0f:  // Intel Core 2 Duo processor, Intel Core 2 Duo mobile
+                    // processor, Intel Core 2 Quad processor, Intel Core 2 Quad
+                    // mobile processor, Intel Core 2 Extreme processor, Intel
+                    // Pentium Dual-Core processor, Intel Xeon processor, model
+                    // 0Fh. All processors are manufactured using the 65 nm
+                    // process.
+        case 0x16:  // Intel Celeron processor model 16h. All processors are
+                    // manufactured using the 65 nm process
+          CPU = "core2";
+          *Type = INTEL_CORE2;
+          break;
+        case 0x17:  // Intel Core 2 Extreme processor, Intel Xeon processor,
+                    // model 17h. All processors are manufactured using the 45
+                    // nm process.
+                    //
+                    // 45nm: Penryn , Wolfdale, Yorkfield (XE)
+        case 0x1d:  // Intel Xeon processor MP. All processors are manufactured
+                    // using the 45 nm process.
+          CPU = "penryn";
+          *Type = INTEL_CORE2;
+          break;
+        case 0x1a:  // Intel Core i7 processor and Intel Xeon processor. All
+                    // processors are manufactured using the 45 nm process.
+        case 0x1e:  // Intel(R) Core(TM) i7 CPU         870  @ 2.93GHz.
+                    // As found in a Summer 2010 model iMac.
+        case 0x1f:
+        case 0x2e:  // Nehalem EX
+          CPU = "nehalem";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_NEHALEM;
+          break;
+        case 0x25:  // Intel Core i7, laptop version.
+        case 0x2c:  // Intel Core i7 processor and Intel Xeon processor. All
+                    // processors are manufactured using the 32 nm process.
+        case 0x2f:  // Westmere EX
+          CPU = "westmere";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_WESTMERE;
+          break;
+        case 0x2a:  // Intel Core i7 processor. All processors are manufactured
+                    // using the 32 nm process.
+        case 0x2d:
+          CPU = "sandybridge";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_SANDYBRIDGE;
+          break;
+        case 0x3a:
+        case 0x3e:  // Ivy Bridge EP
+          CPU = "ivybridge";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_IVYBRIDGE;
+          break;
+
+        // Haswell:
+        case 0x3c:
+        case 0x3f:
+        case 0x45:
+        case 0x46:
+          CPU = "haswell";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_HASWELL;
+          break;
+
+        // Broadwell:
+        case 0x3d:
+        case 0x47:
+        case 0x4f:
+        case 0x56:
+          CPU = "broadwell";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_BROADWELL;
+          break;
+
+        // Skylake:
+        case 0x4e:  // Skylake mobile
+        case 0x5e:  // Skylake desktop
+        case 0x8e:  // Kaby Lake mobile
+        case 0x9e:  // Kaby Lake desktop
+        case 0xa5:  // Comet Lake-H/S
+        case 0xa6:  // Comet Lake-U
+          CPU = "skylake";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_SKYLAKE;
+          break;
+
+        // Rocketlake:
+        case 0xa7:
+          CPU = "rocketlake";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_ROCKETLAKE;
+          break;
+
+        // Skylake Xeon:
+        case 0x55:
+          *Type = INTEL_COREI7;
+          if (testFeature(FEATURE_AVX512BF16)) {
+            CPU = "cooperlake";
+            *Subtype = INTEL_COREI7_COOPERLAKE;
+          } else if (testFeature(FEATURE_AVX512VNNI)) {
+            CPU = "cascadelake";
+            *Subtype = INTEL_COREI7_CASCADELAKE;
+          } else {
+            CPU = "skylake-avx512";
+            *Subtype = INTEL_COREI7_SKYLAKE_AVX512;
+          }
+          break;
+
+        // Cannonlake:
+        case 0x66:
+          CPU = "cannonlake";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_CANNONLAKE;
+          break;
+
+        // Icelake:
+        case 0x7d:
+        case 0x7e:
+          CPU = "icelake-client";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_ICELAKE_CLIENT;
+          break;
+
+        // Tigerlake:
+        case 0x8c:
+        case 0x8d:
+          CPU = "tigerlake";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_TIGERLAKE;
+          break;
+
+        // Alderlake:
+        case 0x97:
+        case 0x9a:
+        // Raptorlake:
+        case 0xb7:
+        case 0xba:
+        case 0xbf:
+        // Meteorlake:
+        case 0xaa:
+        case 0xac:
+        // Gracemont:
+        case 0xbe:
+          CPU = "alderlake";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_ALDERLAKE;
+          break;
+
+        // Arrowlake:
+        case 0xc5:
+          CPU = "arrowlake";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_ARROWLAKE;
+          break;
+
+        // Arrowlake S:
+        case 0xc6:
+        // Lunarlake:
+        case 0xbd:
+          CPU = "arrowlake-s";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_ARROWLAKE_S;
+          break;
+
+        // Pantherlake:
+        case 0xcc:
+          CPU = "pantherlake";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_PANTHERLAKE;
+          break;
+
+        // Icelake Xeon:
+        case 0x6a:
+        case 0x6c:
+          CPU = "icelake-server";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_ICELAKE_SERVER;
+          break;
+
+        // Emerald Rapids:
+        case 0xcf:
+        // Sapphire Rapids:
+        case 0x8f:
+          CPU = "sapphirerapids";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_SAPPHIRERAPIDS;
+          break;
+
+        // Granite Rapids:
+        case 0xad:
+          CPU = "graniterapids";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_GRANITERAPIDS;
+          break;
+
+        // Granite Rapids D:
+        case 0xae:
+          CPU = "graniterapids-d";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_COREI7_GRANITERAPIDS_D;
+          break;
+
+        case 0x1c:  // Most 45 nm Intel Atom processors
+        case 0x26:  // 45 nm Atom Lincroft
+        case 0x27:  // 32 nm Atom Medfield
+        case 0x35:  // 32 nm Atom Midview
+        case 0x36:  // 32 nm Atom Midview
+          CPU = "bonnell";
+          *Type = INTEL_BONNELL;
+          break;
+
+        // Atom Silvermont codes from the Intel software optimization guide.
+        case 0x37:
+        case 0x4a:
+        case 0x4d:
+        case 0x5a:
+        case 0x5d:
+        case 0x4c:  // really airmont
+          CPU = "silvermont";
+          *Type = INTEL_SILVERMONT;
+          break;
+        // Goldmont:
+        case 0x5c:  // Apollo Lake
+        case 0x5f:  // Denverton
+          CPU = "goldmont";
+          *Type = INTEL_GOLDMONT;
+          break;  // "goldmont"
+        case 0x7a:
+          CPU = "goldmont-plus";
+          *Type = INTEL_GOLDMONT_PLUS;
+          break;
+        case 0x86:
+        case 0x8a:  // Lakefield
+        case 0x96:  // Elkhart Lake
+        case 0x9c:  // Jasper Lake
+          CPU = "tremont";
+          *Type = INTEL_TREMONT;
+          break;
+
+        // Sierraforest:
+        case 0xaf:
+          CPU = "sierraforest";
+          *Type = INTEL_SIERRAFOREST;
+          break;
+
+        // Grandridge:
+        case 0xb6:
+          CPU = "grandridge";
+          *Type = INTEL_GRANDRIDGE;
+          break;
+
+        // Clearwaterforest:
+        case 0xdd:
+          CPU = "clearwaterforest";
+          *Type = INTEL_COREI7;
+          *Subtype = INTEL_CLEARWATERFOREST;
+          break;
+
+        case 0x57:
+          CPU = "knl";
+          *Type = INTEL_KNL;
+          break;
+
+        case 0x85:
+          CPU = "knm";
+          *Type = INTEL_KNM;
+          break;
+
+        default:  // Unknown family 6 CPU.
+          break;
+      }
+      break;
+    default:
+      break;  // Unknown.
+  }
+
+  return CPU;
+}
+
+static const char *getAMDProcessorTypeAndSubtype(unsigned Family,
+                                                 unsigned Model,
+                                                 const unsigned *Features,
+                                                 unsigned *Type,
+                                                 unsigned *Subtype) {
+  // We select CPU strings to match the code in Host.cpp, but we don't use them
+  // in compiler-rt.
+  const char *CPU = 0;
+
+  switch (Family) {
+    case 16:
+      CPU = "amdfam10";
+      *Type = AMDFAM10H;
+      switch (Model) {
+        case 2:
+          *Subtype = AMDFAM10H_BARCELONA;
+          break;
+        case 4:
+          *Subtype = AMDFAM10H_SHANGHAI;
+          break;
+        case 8:
+          *Subtype = AMDFAM10H_ISTANBUL;
+          break;
+      }
+      break;
+    case 20:
+      CPU = "btver1";
+      *Type = AMD_BTVER1;
+      break;
+    case 21:
+      CPU = "bdver1";
+      *Type = AMDFAM15H;
+      if (Model >= 0x60 && Model <= 0x7f) {
+        CPU = "bdver4";
+        *Subtype = AMDFAM15H_BDVER4;
+        break;  // 60h-7Fh: Excavator
+      }
+      if (Model >= 0x30 && Model <= 0x3f) {
+        CPU = "bdver3";
+        *Subtype = AMDFAM15H_BDVER3;
+        break;  // 30h-3Fh: Steamroller
+      }
+      if ((Model >= 0x10 && Model <= 0x1f) || Model == 0x02) {
+        CPU = "bdver2";
+        *Subtype = AMDFAM15H_BDVER2;
+        break;  // 02h, 10h-1Fh: Piledriver
+      }
+      if (Model <= 0x0f) {
+        *Subtype = AMDFAM15H_BDVER1;
+        break;  // 00h-0Fh: Bulldozer
+      }
+      break;
+    case 22:
+      CPU = "btver2";
+      *Type = AMD_BTVER2;
+      break;
+    case 23:
+      CPU = "znver1";
+      *Type = AMDFAM17H;
+      if ((Model >= 0x30 && Model <= 0x3f) || (Model == 0x47) ||
+          (Model >= 0x60 && Model <= 0x67) ||
+          (Model >= 0x68 && Model <= 0x6f) ||
+          (Model >= 0x70 && Model <= 0x7f) ||
+          (Model >= 0x84 && Model <= 0x87) ||
+          (Model >= 0x90 && Model <= 0x97) ||
+          (Model >= 0x98 && Model <= 0x9f) ||
+          (Model >= 0xa0 && Model <= 0xaf)) {
+        // Family 17h Models 30h-3Fh (Starship) Zen 2
+        // Family 17h Models 47h (Cardinal) Zen 2
+        // Family 17h Models 60h-67h (Renoir) Zen 2
+        // Family 17h Models 68h-6Fh (Lucienne) Zen 2
+        // Family 17h Models 70h-7Fh (Matisse) Zen 2
+        // Family 17h Models 84h-87h (ProjectX) Zen 2
+        // Family 17h Models 90h-97h (VanGogh) Zen 2
+        // Family 17h Models 98h-9Fh (Mero) Zen 2
+        // Family 17h Models A0h-AFh (Mendocino) Zen 2
+        CPU = "znver2";
+        *Subtype = AMDFAM17H_ZNVER2;
+        break;
+      }
+      if ((Model >= 0x10 && Model <= 0x1f) ||
+          (Model >= 0x20 && Model <= 0x2f)) {
+        // Family 17h Models 10h-1Fh (Raven1) Zen
+        // Family 17h Models 10h-1Fh (Picasso) Zen+
+        // Family 17h Models 20h-2Fh (Raven2 x86) Zen
+        *Subtype = AMDFAM17H_ZNVER1;
+        break;
+      }
+      break;
+    case 25:
+      CPU = "znver3";
+      *Type = AMDFAM19H;
+      if ((Model <= 0x0f) || (Model >= 0x20 && Model <= 0x2f) ||
+          (Model >= 0x30 && Model <= 0x3f) ||
+          (Model >= 0x40 && Model <= 0x4f) ||
+          (Model >= 0x50 && Model <= 0x5f)) {
+        // Family 19h Models 00h-0Fh (Genesis, Chagall) Zen 3
+        // Family 19h Models 20h-2Fh (Vermeer) Zen 3
+        // Family 19h Models 30h-3Fh (Badami) Zen 3
+        // Family 19h Models 40h-4Fh (Rembrandt) Zen 3+
+        // Family 19h Models 50h-5Fh (Cezanne) Zen 3
+        *Subtype = AMDFAM19H_ZNVER3;
+        break;
+      }
+      if ((Model >= 0x10 && Model <= 0x1f) ||
+          (Model >= 0x60 && Model <= 0x6f) ||
+          (Model >= 0x70 && Model <= 0x77) ||
+          (Model >= 0x78 && Model <= 0x7f) ||
+          (Model >= 0xa0 && Model <= 0xaf)) {
+        // Family 19h Models 10h-1Fh (Stones; Storm Peak) Zen 4
+        // Family 19h Models 60h-6Fh (Raphael) Zen 4
+        // Family 19h Models 70h-77h (Phoenix, Hawkpoint1) Zen 4
+        // Family 19h Models 78h-7Fh (Phoenix 2, Hawkpoint2) Zen 4
+        // Family 19h Models A0h-AFh (Stones-Dense) Zen 4
+        CPU = "znver4";
+        *Subtype = AMDFAM19H_ZNVER4;
+        break;  //  "znver4"
+      }
+      break;  // family 19h
+    default:
+      break;  // Unknown AMD CPU.
+  }
+
+  return CPU;
+}
+
+static void getAvailableFeatures(unsigned ECX, unsigned EDX, unsigned MaxLeaf,
+                                 unsigned *Features) {
+  unsigned EAX = 0, EBX = 0;
+
+#define hasFeature(F) ((Features[F / 32] >> (F % 32)) & 1)
+#define setFeature(F) Features[F / 32] |= 1U << (F % 32)
+
+  if ((EDX >> 15) & 1) setFeature(FEATURE_CMOV);
+  if ((EDX >> 23) & 1) setFeature(FEATURE_MMX);
+  if ((EDX >> 25) & 1) setFeature(FEATURE_SSE);
+  if ((EDX >> 26) & 1) setFeature(FEATURE_SSE2);
+
+  if ((ECX >> 0) & 1) setFeature(FEATURE_SSE3);
+  if ((ECX >> 1) & 1) setFeature(FEATURE_PCLMUL);
+  if ((ECX >> 9) & 1) setFeature(FEATURE_SSSE3);
+  if ((ECX >> 12) & 1) setFeature(FEATURE_FMA);
+  if ((ECX >> 13) & 1) setFeature(FEATURE_CMPXCHG16B);
+  if ((ECX >> 19) & 1) setFeature(FEATURE_SSE4_1);
+  if ((ECX >> 20) & 1) setFeature(FEATURE_SSE4_2);
+  if ((ECX >> 22) & 1) setFeature(FEATURE_MOVBE);
+  if ((ECX >> 23) & 1) setFeature(FEATURE_POPCNT);
+  if ((ECX >> 25) & 1) setFeature(FEATURE_AES);
+  if ((ECX >> 29) & 1) setFeature(FEATURE_F16C);
+
+  // If CPUID indicates support for XSAVE, XRESTORE and AVX, and XGETBV
+  // indicates that the AVX registers will be saved and restored on context
+  // switch, then we have full AVX support.
+  const unsigned AVXBits = (1 << 27) | (1 << 28);
+  bool HasAVX = ((ECX & AVXBits) == AVXBits) && !getX86XCR0(&EAX, &EDX) &&
+                ((EAX & 0x6) == 0x6);
+#if defined(__APPLE__)
+  // Darwin lazily saves the AVX512 context on first use: trust that the OS will
+  // save the AVX512 context if we use AVX512 instructions, even the bit is not
+  // set right now.
+  bool HasAVX512Save = true;
+#else
+  // AVX512 requires additional context to be saved by the OS.
+  bool HasAVX512Save = HasAVX && ((EAX & 0xe0) == 0xe0);
+#endif
+
+  if (HasAVX) setFeature(FEATURE_AVX);
+
+  bool HasLeaf7 =
+      MaxLeaf >= 0x7 && !getX86CpuIDAndInfoEx(0x7, 0x0, &EAX, &EBX, &ECX, &EDX);
+
+  if (HasLeaf7) {
+    if ((EBX >> 3) & 1) setFeature(FEATURE_BMI);
+    if (((EBX >> 5) & 1) && HasAVX) setFeature(FEATURE_AVX2);
+    if ((EBX >> 8) & 1) setFeature(FEATURE_BMI2);
+    if (HasAVX512Save) {
+      if ((EBX >> 16) & 1) setFeature(FEATURE_AVX512F);
+      if ((EBX >> 17) & 1) setFeature(FEATURE_AVX512DQ);
+      if ((EBX >> 21) & 1) setFeature(FEATURE_AVX512IFMA);
+      if ((EBX >> 26) & 1) setFeature(FEATURE_AVX512PF);
+      if ((EBX >> 27) & 1) setFeature(FEATURE_AVX512ER);
+      if ((EBX >> 28) & 1) setFeature(FEATURE_AVX512CD);
+      if ((EBX >> 30) & 1) setFeature(FEATURE_AVX512BW);
+      if ((EBX >> 31) & 1) setFeature(FEATURE_AVX512VL);
+      if ((ECX >> 1) & 1) setFeature(FEATURE_AVX512VBMI);
+      if ((ECX >> 6) & 1) setFeature(FEATURE_AVX512VBMI2);
+      if ((ECX >> 11) & 1) setFeature(FEATURE_AVX512VNNI);
+      if ((ECX >> 12) & 1) setFeature(FEATURE_AVX512BITALG);
+      if ((ECX >> 14) & 1) setFeature(FEATURE_AVX512VPOPCNTDQ);
+      if ((EDX >> 2) & 1) setFeature(FEATURE_AVX5124VNNIW);
+      if ((EDX >> 3) & 1) setFeature(FEATURE_AVX5124FMAPS);
+      if ((EDX >> 8) & 1) setFeature(FEATURE_AVX512VP2INTERSECT);
+      if ((EDX >> 23) & 1) setFeature(FEATURE_AVX512FP16);
+    }
+    if ((ECX >> 8) & 1) setFeature(FEATURE_GFNI);
+    if (((ECX >> 10) & 1) && HasAVX) setFeature(FEATURE_VPCLMULQDQ);
+  }
+
+  // EAX from subleaf 0 is the maximum subleaf supported. Some CPUs don't
+  // return all 0s for invalid subleaves so check the limit.
+  bool HasLeaf7Subleaf1 =
+      HasLeaf7 && EAX >= 1 &&
+      !getX86CpuIDAndInfoEx(0x7, 0x1, &EAX, &EBX, &ECX, &EDX);
+  if (HasLeaf7Subleaf1 && ((EAX >> 5) & 1) && HasAVX512Save)
+    setFeature(FEATURE_AVX512BF16);
+
+  unsigned MaxExtLevel;
+  getX86CpuIDAndInfo(0x80000000, &MaxExtLevel, &EBX, &ECX, &EDX);
+
+  bool HasExtLeaf1 = MaxExtLevel >= 0x80000001 &&
+                     !getX86CpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
+  if (HasExtLeaf1) {
+    if (ECX & 1) setFeature(FEATURE_LAHF_LM);
+    if ((ECX >> 5) & 1) setFeature(FEATURE_LZCNT);
+    if (((ECX >> 6) & 1)) setFeature(FEATURE_SSE4_A);
+    if (((ECX >> 11) & 1)) setFeature(FEATURE_XOP);
+    if (((ECX >> 16) & 1)) setFeature(FEATURE_FMA4);
+    if (((EDX >> 29) & 1)) setFeature(FEATURE_LM);
+  }
+
+  if (hasFeature(FEATURE_LM) && hasFeature(FEATURE_SSE2)) {
+    setFeature(FEATURE_X86_64_BASELINE);
+    if (hasFeature(FEATURE_CMPXCHG16B) && hasFeature(FEATURE_POPCNT) &&
+        hasFeature(FEATURE_LAHF_LM) && hasFeature(FEATURE_SSE4_2)) {
+      setFeature(FEATURE_X86_64_V2);
+      if (hasFeature(FEATURE_AVX2) && hasFeature(FEATURE_BMI) &&
+          hasFeature(FEATURE_BMI2) && hasFeature(FEATURE_F16C) &&
+          hasFeature(FEATURE_FMA) && hasFeature(FEATURE_LZCNT) &&
+          hasFeature(FEATURE_MOVBE)) {
+        setFeature(FEATURE_X86_64_V3);
+        if (hasFeature(FEATURE_AVX512BW) && hasFeature(FEATURE_AVX512CD) &&
+            hasFeature(FEATURE_AVX512DQ) && hasFeature(FEATURE_AVX512VL))
+          setFeature(FEATURE_X86_64_V4);
+      }
+    }
+  }
+
+#undef hasFeature
+#undef setFeature
+}
+
+int __cpu_indicator_init(void) CONSTRUCTOR_ATTRIBUTE;
+
+struct __processor_model {
+  unsigned int __cpu_vendor;
+  unsigned int __cpu_type;
+  unsigned int __cpu_subtype;
+  unsigned int __cpu_features[1];
+} __cpu_model = {0, 0, 0, {0}};
+
+unsigned __cpu_features2[(CPU_FEATURE_MAX - 1) / 32];
+
+// A constructor function that is sets __cpu_model and __cpu_features2 with
+// the right values.  This needs to run only once.  This constructor is
+// given the highest priority and it should run before constructors without
+// the priority set.  However, it still runs after ifunc initializers and
+// needs to be called explicitly there.
+
+int CONSTRUCTOR_ATTRIBUTE __cpu_indicator_init(void) {
+  unsigned EAX, EBX, ECX, EDX;
+  unsigned MaxLeaf = 5;
+  unsigned Vendor;
+  unsigned Model, Family;
+  unsigned Features[(CPU_FEATURE_MAX + 31) / 32] = {0};
+  _Static_assert(sizeof(Features) / sizeof(Features[0]) == 4, "");
+  _Static_assert(sizeof(__cpu_features2) / sizeof(__cpu_features2[0]) == 3, "");
+
+  // This function needs to run just once.
+  if (__cpu_model.__cpu_vendor) return 0;
+
+  if (!isCpuIdSupported() ||
+      getX86CpuIDAndInfo(0, &MaxLeaf, &Vendor, &ECX, &EDX) || MaxLeaf < 1) {
+    __cpu_model.__cpu_vendor = VENDOR_OTHER;
+    return -1;
+  }
+
+  getX86CpuIDAndInfo(1, &EAX, &EBX, &ECX, &EDX);
+  detectX86FamilyModel(EAX, &Family, &Model);
+
+  // Find available features.
+  getAvailableFeatures(ECX, EDX, MaxLeaf, &Features[0]);
+
+  __cpu_model.__cpu_features[0] = Features[0];
+  __cpu_features2[0] = Features[1];
+  __cpu_features2[1] = Features[2];
+  __cpu_features2[2] = Features[3];
+
+  if (Vendor == SIG_INTEL) {
+    // Get CPU type.
+    getIntelProcessorTypeAndSubtype(Family, Model, &Features[0],
+                                    &(__cpu_model.__cpu_type),
+                                    &(__cpu_model.__cpu_subtype));
+    __cpu_model.__cpu_vendor = VENDOR_INTEL;
+  } else if (Vendor == SIG_AMD) {
+    // Get CPU type.
+    getAMDProcessorTypeAndSubtype(Family, Model, &Features[0],
+                                  &(__cpu_model.__cpu_type),
+                                  &(__cpu_model.__cpu_subtype));
+    __cpu_model.__cpu_vendor = VENDOR_AMD;
+  } else {
+    __cpu_model.__cpu_vendor = VENDOR_OTHER;
+  }
+
+  return 0;
+}
+
+#endif  // __x86_64__ && (gnuc || clang)
--- a/libc/log/addr2linepath.c
+++ b/libc/log/addr2linepath.c
@ -36,7 +36,7 @@ static struct {
  char buf[PATH_MAX];
 } g_addr2line;

-const void GetAddr2linePathInit(void) {
+void GetAddr2linePathInit(void) {
  int e = errno;
  const char *path;
  if (!(path = getenv("ADDR2LINE"))) {
--- a/libc/log/cxaprintexits.c
+++ b/libc/log/cxaprintexits.c
@ -48,10 +48,10 @@ void __cxa_printexits(FILE *f, void *pred) {
          if (symbol) {
            snprintf(name, sizeof(name), "%s", symbol);
          } else {
-            snprintf(name, sizeof(name), "0x%016lx", b->p[i].fp);
+            snprintf(name, sizeof(name), "0x%016lx", (unsigned long)b->p[i].fp);
          }
-          fprintf(f, "%-22s 0x%016lx 0x%016lx\n", name, b->p[i].arg,
-                  b->p[i].pred);
+          fprintf(f, "%-22s 0x%016lx 0x%016lx\n", name,
+                  (unsigned long)b->p[i].arg, (unsigned long)b->p[i].pred);
        }
      }
    } while ((b = b->next));
--- a/libc/log/die.c
+++ b/libc/log/die.c
@ -20,6 +20,7 @@
 #include "libc/errno.h"
 #include "libc/intrin/describebacktrace.internal.h"
 #include "libc/intrin/kprintf.h"
+#include "libc/log/backtrace.internal.h"
 #include "libc/log/internal.h"
 #include "libc/runtime/runtime.h"
 #include "libc/runtime/symbols.internal.h"
@ -51,5 +52,6 @@ relegated wontreturn void __die(void) {
          __nocolor ? "" : "\e[1;31m", program_invocation_short_name, host,
          getpid(), gettid(), __nocolor ? "" : "\e[0m", FindDebugBinary(),
          DescribeBacktrace(__builtin_frame_address(0)));
+  ShowBacktrace(2, __builtin_frame_address(0));
  _Exit(77);
 }
--- a/libc/log/gdbexec.c
+++ b/libc/log/gdbexec.c
@ -41,7 +41,7 @@ relegated int(gdbexec)(const char *cmd) {
    elf = "-q";
  }
  bp = __builtin_frame_address(0);
-  sprintf(breakcmd, "%s *%#p", "break", bp->addr);
+  sprintf(breakcmd, "%s *%#lx", "break", (unsigned long)bp->addr);
  if (!(pid = vfork())) {
    execv(gdb, (char *const[]){
                   "gdb",
--- a/libc/log/oncrash_amd64.c
+++ b/libc/log/oncrash_amd64.c
@ -252,16 +252,9 @@ static relegated void ShowCrashReport(int err, int sig, struct siginfo *si,
 }

 relegated void __oncrash(int sig, struct siginfo *si, void *arg) {
-  ucontext_t *ctx = arg;
-  int gdbpid, err;
-  err = errno;
-  if ((gdbpid = IsDebuggerPresent(true))) {
-    DebugBreak();
-  }
-  if (!(gdbpid > 0 && (sig == SIGTRAP || sig == SIGQUIT))) {
-    __restore_tty();
-    ShowCrashReport(err, sig, si, ctx);
-  }
+  int err = errno;
+  __restore_tty();
+  ShowCrashReport(err, sig, si, arg);
 }

 #endif /* __x86_64__ */
--- a/libc/macros.internal.h
+++ b/libc/macros.internal.h
@ -21,8 +21,8 @@
 #define TRUE  1
 #define FALSE 0

-#define IS2POW(X)       (!((X) & ((X)-1)))
-#define ROUNDUP(X, K)   (((X) + (K)-1) & -(K))
+#define IS2POW(X)       (!((X) & ((X) - 1)))
+#define ROUNDUP(X, K)   (((X) + (K) - 1) & -(K))
 #define ROUNDDOWN(X, K) ((X) & -(K))
 #ifndef __ASSEMBLER__
 #define ABS(X)    ((X) >= 0 ? (X) : -(X))
@ -40,7 +40,7 @@
 #define STRINGIFY(A)        __STRINGIFY(A)
 #define EQUIVALENT(X, Y)    (__builtin_constant_p((X) == (Y)) && ((X) == (Y)))
 #define TYPE_BIT(type)      (sizeof(type) * CHAR_BIT)
-#define TYPE_SIGNED(type)   (((type)-1) < 0)
+#define TYPE_SIGNED(type)   (((type) - 1) < 0)
 #define TYPE_INTEGRAL(type) (((type)0.5) != 0.5)

 #define ARRAYLEN(A) \
--- a/libc/mem/mergesort.c
+++ b/libc/mem/mergesort.c
@ -54,8 +54,8 @@ asm(".include \"libc/disclaimer.inc\"");
 * (The default is pairwise merging.)
 */

-static void setup(uint8_t *, uint8_t *, size_t, size_t, int (*)(), void *);
-static void insertionsort(uint8_t *, size_t, size_t, int (*)(), void *);
+static void setup(uint8_t *, uint8_t *, size_t, size_t, int (*)(const void *, const void *, void *), void *);
+static void insertionsort(uint8_t *, size_t, size_t, int (*)(const void *, const void *, void *), void *);

 #define ISIZE sizeof(int)
 #define PSIZE sizeof(uint8_t *)
--- a/libc/nexgen32e/rdtscp.h
+++ b/libc/nexgen32e/rdtscp.h
@ -5,7 +5,7 @@
 #include "libc/nexgen32e/x86feature.h"
 COSMOPOLITAN_C_START_

-#define TSC_AUX_CORE(MSR) ((MSR)&0xfff)
+#define TSC_AUX_CORE(MSR) ((MSR) & 0xfff)
 #define TSC_AUX_NODE(MSR) (((MSR) >> 12) & 0xfff)

 /**
@ -41,9 +41,10 @@ COSMOPOLITAN_C_START_
      asm volatile("rdpid\t%0" : "=r"(Msr) : /* no inputs */ : "memory"); \
      Ok = true;                                                          \
    } else if (IsLinux()) {                                               \
+      char *p = (char *)0x7b;                                             \
      asm volatile(ZFLAG_ASM("lsl\t%2,%1")                                \
                   : ZFLAG_CONSTRAINT(Ok), "=r"(Msr)                      \
-                   : "r"(0x7b)                                            \
+                   : "r"(p)                                               \
                   : "memory");                                           \
    }                                                                     \
    if (!Ok && X86_HAVE(RDTSCP)) {                                        \
--- a/libc/nt/BCryptPrimitives/ProcessPrng.S
+++ b/libc/nt/BCryptPrimitives/ProcessPrng.S
@ -1,18 +1,18 @@
 #include "libc/nt/codegen.h"
-.imp	advapi32,__imp_SystemFunction036,SystemFunction036
+.imp	BCryptPrimitives,__imp_ProcessPrng,ProcessPrng

 	.text.windows
 	.ftrace1
-RtlGenRandom:
+ProcessPrng:
 	.ftrace2
 #ifdef __x86_64__
 	push	%rbp
 	mov	%rsp,%rbp
-	mov	__imp_SystemFunction036(%rip),%rax
+	mov	__imp_ProcessPrng(%rip),%rax
 	jmp	__sysv2nt
 #elif defined(__aarch64__)
 	mov	x0,#0
 	ret
 #endif
-	.endfn	RtlGenRandom,globl
+	.endfn	ProcessPrng,globl
 	.previous
--- a/libc/nt/BUILD.mk
+++ b/libc/nt/BUILD.mk
@ -297,6 +297,24 @@ $(LIBC_NT_PSAPI_A).pkg:					\

 #───────────────────────────────────────────────────────────────────────────────

+LIBC_NT_ARTIFACTS += LIBC_NT_BCRYPTPRIMITIVES_A
+LIBC_NT_BCRYPTPRIMITIVES = $(LIBC_NT_BCRYPTPRIMITIVES_A_DEPS) $(LIBC_NT_BCRYPTPRIMITIVES_A)
+LIBC_NT_BCRYPTPRIMITIVES_A = o/$(MODE)/libc/nt/BCryptPrimitives.a
+LIBC_NT_BCRYPTPRIMITIVES_A_SRCS := $(wildcard libc/nt/BCryptPrimitives/*.S)
+LIBC_NT_BCRYPTPRIMITIVES_A_OBJS = $(LIBC_NT_BCRYPTPRIMITIVES_A_SRCS:%.S=o/$(MODE)/%.o)
+LIBC_NT_BCRYPTPRIMITIVES_A_CHECKS = $(LIBC_NT_BCRYPTPRIMITIVES_A).pkg
+LIBC_NT_BCRYPTPRIMITIVES_A_DIRECTDEPS = LIBC_NT_KERNEL32
+LIBC_NT_BCRYPTPRIMITIVES_A_DEPS := $(call uniq,$(foreach x,$(LIBC_NT_BCRYPTPRIMITIVES_A_DIRECTDEPS),$($(x))))
+$(LIBC_NT_BCRYPTPRIMITIVES_A):				\
+		libc/nt/BCryptPrimitives/		\
+		$(LIBC_NT_BCRYPTPRIMITIVES_A).pkg	\
+		$(LIBC_NT_BCRYPTPRIMITIVES_A_OBJS)
+$(LIBC_NT_BCRYPTPRIMITIVES_A).pkg:			\
+		$(LIBC_NT_BCRYPTPRIMITIVES_A_OBJS)	\
+		$(foreach x,$(LIBC_NT_BCRYPTPRIMITIVES_A_DIRECTDEPS),$($(x)_A).pkg)
+
+#───────────────────────────────────────────────────────────────────────────────
+
 # let aarch64 compile these
 o/$(MODE)/libc/nt/%.o: libc/nt/%.S
 	@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) $<
--- a/libc/nt/master.sh
+++ b/libc/nt/master.sh
@ -362,7 +362,6 @@ imp	'RegisterEventSource'					RegisterEventSourceW					advapi32	2
 imp	'ReportEvent'						ReportEventW						advapi32	9
 imp	'ReportEventA'						ReportEventA						advapi32	9
 imp	'RevertToSelf'						RevertToSelf						advapi32	0
-imp	'RtlGenRandom'						SystemFunction036					advapi32	2
 imp	'TraceSetInformation'					TraceSetInformation					advapi32 # Windows 7+

 # USER32.DLL
@ -611,6 +610,11 @@ imp	'GetModuleBaseName'					GetModuleBaseNameW					psapi		4
 imp	'GetProcessImageFileName'				GetProcessImageFileNameW				psapi		3
 imp	'GetProcessMemoryInfo'					GetProcessMemoryInfo					psapi		3

+# BCryptPrimitives.dll
+#
+#	Name							Actual							DLL			Arity
+imp	'ProcessPrng'						ProcessPrng						BCryptPrimitives	2
+
 # API-MS-Win-Core-Synch-l1-2-0.dll (Windows 8+)
 #
 #	Name							Actual							DLL					Arity
--- a/libc/nt/runtime.h
+++ b/libc/nt/runtime.h
@ -36,11 +36,11 @@ bool32 TerminateProcess(int64_t hProcess, uint32_t uExitCode);
 void TerminateThisProcess(uint32_t dwWaitStatus) wontreturn;
 void ExitProcess(uint32_t uExitCode) wontreturn;
 uint32_t GetLastError(void) nosideeffect;
-bool32 CloseHandle(int64_t hObject) dontthrow nocallback;
+bool32 CloseHandle(int64_t hObject) dontthrow dontcallback;
 intptr_t GetStdHandle(uint32_t nStdHandle) nosideeffect;
 bool32 SetStdHandle(uint32_t nStdHandle, int64_t hHandle);
 bool32 SetDefaultDllDirectories(unsigned dirflags);
-bool32 RtlGenRandom(void *RandomBuffer, uint32_t RandomBufferLength);
+bool32 ProcessPrng(void *RandomBuffer, uint32_t RandomBufferLength);
 uint32_t GetModuleFileName(int64_t hModule, char16_t *lpFilename,
                           uint32_t nSize);

--- a/libc/nt/struct/teb.h
+++ b/libc/nt/struct/teb.h
@ -1,6 +1,5 @@
 #ifndef COSMOPOLITAN_LIBC_NT_TEB_H_
 #define COSMOPOLITAN_LIBC_NT_TEB_H_
-#include "libc/intrin/segmentation.h"
 #include "libc/nt/struct/peb.h"
 #if defined(__GNUC__) && !defined(__STRICT_ANSI__)

@ -8,19 +7,19 @@
 * These macros address directly into NT's TEB a.k.a. TIB
 * Any function that does this needs the `dontasan` keyword
 */
-#define NtGetPeb()           gs((struct NtPeb **)(0x60ULL))
-#define NtGetTeb()           gs((void **)(0x30))    /* %gs:0 linear address */
-#define NtGetPid()           gs((uint32_t *)(0x40)) /* GetCurrentProcessId() */
-#define NtGetTid()           gs((uint32_t *)(0x48)) /* GetCurrentThreadId() */
-#define NtGetErr()           gs((int *)(0x68))
-#define _NtGetSeh()          gs((void **)(0x00))
-#define _NtGetStackHigh()    gs((void **)(0x08))
-#define _NtGetStackLow()     gs((void **)(0x10))
-#define _NtGetSubsystemTib() gs((void **)(0x18))
-#define _NtGetFib()          gs((void **)(0x20))
-#define _NtGetEnv()          gs((char16_t **)(0x38))
-#define _NtGetRpc()          gs((void **)(0x50))
-#define _NtGetTls()          gs((void **)(0x58)) /* cf. gs((long *)0x1480 + i0..64) */
+#define NtGetPeb()           ((__seg_gs struct NtPeb *)0x60)
+#define NtGetTeb()           ((void *)*(__seg_gs uintptr_t *)0x30)
+#define NtGetPid()           (*(__seg_gs uint32_t *)0x40)
+#define NtGetTid()           (*(__seg_gs uint32_t *)0x48)
+#define NtGetErr()           (*(__seg_gs int *)0x68)
+#define _NtGetSeh()          ((void *)*(__seg_gs uintptr_t *)0x00)
+#define _NtGetStackHigh()    ((void *)*(__seg_gs uintptr_t *)0x08)
+#define _NtGetStackLow()     ((void *)*(__seg_gs uintptr_t *)0x10)
+#define _NtGetSubsystemTib() ((void *)*(__seg_gs uintptr_t *)0x18)
+#define _NtGetFib()          ((void *)*(__seg_gs uintptr_t *)0x20)
+#define _NtGetEnv()          ((char16_t *)*(__seg_gs intptr_t *)0x38)
+#define _NtGetRpc()          ((void *)*(__seg_gs uintptr_t *)0x50)
+#define _NtGetTls()          ((void *)*(__seg_gs uintptr_t *)0x58)

 #endif /* __GNUC__ && !__STRICT_ANSI__ */
 #endif /* COSMOPOLITAN_LIBC_NT_TEB_H_ */
--- a/libc/proc/fork-nt.c
+++ b/libc/proc/fork-nt.c
@ -78,7 +78,9 @@ static textwindows char16_t *ParseInt(char16_t *p, int64_t *x) {
 }

 static inline textwindows ssize_t ForkIo(int64_t h, char *p, size_t n,
-                                         bool32 (*f)()) {
+                                         bool32 (*f)(int64_t, void *, uint32_t,
+                                                     uint32_t *,
+                                                     struct NtOverlapped *)) {
  size_t i;
  uint32_t x;
  for (i = 0; i < n; i += x) {
@ -90,8 +92,10 @@ static inline textwindows ssize_t ForkIo(int64_t h, char *p, size_t n,
 }

 static dontinline textwindows bool ForkIo2(int64_t h, void *buf, size_t n,
-                                           bool32 (*fn)(), const char *sf,
-                                           bool ischild) {
+                                           bool32 (*fn)(int64_t, void *,
+                                                        uint32_t, uint32_t *,
+                                                        struct NtOverlapped *),
+                                           const char *sf, bool ischild) {
  ssize_t rc = ForkIo(h, buf, n, fn);
  if (ischild) __tls_enabled_set(false);  // prevent tls crash in kprintf
  NTTRACE("%s(%ld, %p, %'zu) → %'zd% m", sf, h, buf, n, rc);
@ -100,9 +104,9 @@ static dontinline textwindows bool ForkIo2(int64_t h, void *buf, size_t n,

 static dontinline textwindows bool WriteAll(int64_t h, void *buf, size_t n) {
  bool ok;
-  ok = ForkIo2(h, buf, n, WriteFile, "WriteFile", false);
+  ok = ForkIo2(h, buf, n, (void *)WriteFile, "WriteFile", false);
 #ifndef NDEBUG
-  if (ok) ok = ForkIo2(h, &n, sizeof(n), WriteFile, "WriteFile", false);
+  if (ok) ok = ForkIo2(h, &n, sizeof(n), (void *)WriteFile, "WriteFile", false);
 #endif
 #if SYSDEBUG
  if (!ok) {
--- a/libc/runtime/clone.c
+++ b/libc/runtime/clone.c
@ -94,7 +94,7 @@ struct CloneArgs {
  void *arg;
 };

-int sys_set_tls();
+int sys_set_tls(uintptr_t, void *);
 int __stack_call(void *, int, long, long, int (*)(void *, int), void *);

 static struct CloneArgs *AllocateCloneArgs(char *stk, size_t stksz) {
--- a/libc/runtime/cosmo2.c
+++ b/libc/runtime/cosmo2.c
@ -149,7 +149,7 @@ wontreturn textstartup void cosmo(long *sp, struct Syslib *m1, char *exename,
  }

  // check system call abi compatibility
-  if (IsXnu() && __syslib->__version < SYSLIB_VERSION) {
+  if (IsXnu() && __syslib->__version < SYSLIB_VERSION_MANDATORY) {
    sys_write(2, "need newer ape loader\n", 22);
    _Exit(127);
  }
--- a/libc/runtime/efimain.greg.c
+++ b/libc/runtime/efimain.greg.c
@ -30,6 +30,9 @@
 #include "libc/runtime/runtime.h"
 #include "libc/str/str.h"

+#pragma GCC diagnostic ignored "-Warray-bounds"
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
+
 #ifdef __x86_64__

 /* TODO: Why can't we change CR3? Could it really need PML5T? */
@ -162,7 +165,7 @@ static void EfiInitAcpi(struct mman *mm, EFI_SYSTEM_TABLE *SystemTable) {
 * @see libc/dce.h
 */
 __msabi EFI_STATUS EfiMain(EFI_HANDLE ImageHandle,
-                                    EFI_SYSTEM_TABLE *SystemTable) {
+                           EFI_SYSTEM_TABLE *SystemTable) {
  struct mman *mm;
  uint32_t DescVersion;
  uintptr_t i, j, MapSize;
@ -215,9 +218,8 @@ __msabi EFI_STATUS EfiMain(EFI_HANDLE ImageHandle,
                                            &kEfiLoadedImageProtocol, &ImgInfo);
  CmdLine = (const char16_t *)ImgInfo->LoadOptions;
  if (!CmdLine || !CmdLine[0]) CmdLine = u"BOOTX64.EFI";
-  Args = GetDosArgv(CmdLine, ArgBlock->ArgBlock,
-                    sizeof(ArgBlock->ArgBlock), ArgBlock->Args,
-                    ARRAYLEN(ArgBlock->Args));
+  Args = GetDosArgv(CmdLine, ArgBlock->ArgBlock, sizeof(ArgBlock->ArgBlock),
+                    ArgBlock->Args, ARRAYLEN(ArgBlock->Args));

  /*
   * Gets information about our current video mode.  Clears the screen.
--- a/libc/runtime/getargmax.c
+++ b/libc/runtime/getargmax.c
@ -19,6 +19,8 @@
 #include "libc/dce.h"
 #include "libc/macros.internal.h"
 #include "libc/runtime/runtime.h"
+#include "libc/stdio/sysparam.h"
+#include "libc/sysv/consts/_posix.h"
 #include "libc/sysv/consts/limits.h"
 #include "libc/sysv/consts/rlimit.h"

@ -29,6 +31,7 @@
 * Returns expensive but more correct version of `ARG_MAX`.
 */
 int __get_arg_max(void) {
+  int res;
  if (IsLinux()) {
    // You might think that just returning a constant 128KiB (ARG_MAX)
    // would make sense, as this guy did:
@ -57,10 +60,11 @@ int __get_arg_max(void) {
    // does. Right now (2019, Linux 5.3) that amounts to:
    uint64_t stacksz;
    stacksz = __get_rlimit(RLIMIT_STACK);
-    return MAX(MIN(stacksz / 4, 3 * (8 * 1024 * 1024) / 4), _ARG_MAX);
+    res = MAX(MIN(stacksz / 4, 3 * (8 * 1024 * 1024) / 4), _ARG_MAX);
  } else if (IsBsd()) {
-    return __get_sysctl(CTL_KERN, KERN_ARGMAX);
+    res = __get_sysctl(CTL_KERN, KERN_ARGMAX);
  } else {
-    return _ARG_MAX;
+    res = _ARG_MAX;
  }
+  return MAX(res, _POSIX_ARG_MAX);
 }
--- a/libc/runtime/memtrack.internal.h
+++ b/libc/runtime/memtrack.internal.h
@ -164,9 +164,9 @@ forceinline pureconst bool OverlapsImageSpace(const void *p, size_t n) {
  const unsigned char *BegA, *EndA, *BegB, *EndB;
  if (n) {
    BegA = p;
-    EndA = BegA + (n - 1);
+    EndA = BegA + n;
    BegB = __executable_start;
-    EndB = _end - 1;
+    EndB = _end;
    return MAX(BegA, BegB) < MIN(EndA, EndB);
  } else {
    return 0;
@ -177,9 +177,9 @@ forceinline pureconst bool OverlapsShadowSpace(const void *p, size_t n) {
  intptr_t BegA, EndA, BegB, EndB;
  if (n) {
    BegA = (intptr_t)p;
-    EndA = BegA + (n - 1);
+    EndA = BegA + n;
    BegB = 0x7fff0000;
-    EndB = 0x10007fffffff;
+    EndB = 0x100080000000;
    return MAX(BegA, BegB) < MIN(EndA, EndB);
  } else {
    return 0;
--- a/libc/runtime/runtime.h
+++ b/libc/runtime/runtime.h
@ -54,7 +54,7 @@ char *getlogin(void);
 int getlogin_r(char *, size_t);
 int login_tty(int);
 int getpagesize(void);
-int syncfs(int);
+int syncfs(int) dontthrow;
 int vhangup(void);
 int getdtablesize(void);
 int sethostname(const char *, size_t);
--- a/libc/runtime/set_tls.c
+++ b/libc/runtime/set_tls.c
@ -29,7 +29,7 @@
 #define AMD64_SET_FSBASE 129
 #define AMD64_SET_GSBASE 131

-int sys_set_tls();
+int sys_set_tls(uintptr_t, void *);

 // we can't allow --ftrace here because cosmo_dlopen() calls this
 // function to fix the tls register, and ftrace needs it unbroken
@ -47,12 +47,12 @@ dontinstrument textstartup void __set_tls(struct CosmoTib *tib) {
    // netbsd has sysarch(X86_SET_FSBASE) but we can't use that because
    // signal handlers will cause it to be reset due to not setting the
    // _mc_tlsbase field in struct mcontext_netbsd.
-    sys_set_tls(tib);
+    sys_set_tls((uintptr_t)tib, 0);
  } else if (IsOpenbsd()) {
-    sys_set_tls(tib);
+    sys_set_tls((uintptr_t)tib, 0);
  } else if (IsXnu()) {
    // thread_fast_set_cthread_self has a weird ABI
-    sys_set_tls((intptr_t)tib - 0x30);
+    sys_set_tls((intptr_t)tib - 0x30, 0);
  } else {
    uint64_t val = (uint64_t)tib;
    asm volatile("wrmsr"
--- a/libc/runtime/syslib.internal.h
+++ b/libc/runtime/syslib.internal.h
@ -10,8 +10,14 @@ COSMOPOLITAN_C_START_
 * `-errno` convention, and hence should be wrapped with `_sysret()`.
 */

-#define SYSLIB_MAGIC   ('s' | 'l' << 8 | 'i' << 16 | 'b' << 24)
-#define SYSLIB_VERSION 8
+#define SYSLIB_MAGIC ('s' | 'l' << 8 | 'i' << 16 | 'b' << 24)
+
+#define SYSLIB_VERSION 9 /* sync with ape/ape-m1.c */
+
+/* if this number increases, then everyone on macos arm will need to
+   reinstall ape loader in order to run newer ape binaries so please
+   don't do this if it's sufficient to just check __syslib->version. */
+#define SYSLIB_VERSION_MANDATORY 8

 typedef uint64_t dispatch_time_t;
 typedef uint64_t dispatch_semaphore_t;
@ -69,11 +75,13 @@ struct Syslib {
  long (*__sem_trywait)(int *);
  long (*__getrlimit)(int, void *);
  long (*__setrlimit)(int, const void *);
-  // v6 (2023-11-03)
+  /* v6 (2023-11-03) */
  void *(*__dlopen)(const char *, int);
  void *(*__dlsym)(void *, const char *);
  int (*__dlclose)(void *);
  char *(*__dlerror)(void);
+  /* v9 (2024-01-31) */
+  int (*__pthread_cpu_number_np)(size_t *);
 };

 extern struct Syslib *__syslib;
--- a/libc/runtime/winargs.internal.h
+++ b/libc/runtime/winargs.internal.h
@ -4,12 +4,17 @@
 COSMOPOLITAN_C_START_

 struct WinArgs {
-  char *argv[8192];
-  char *envp[512];
-  intptr_t auxv[2][2];
-  char argv0buf[256];
-  char argblock[32767];
-  char envblock[32767];
+  union {
+    struct {
+      char *argv[8192];
+      char *envp[512];
+      intptr_t auxv[2][2];
+      char argv0buf[256];
+      char argblock[32767];
+      char envblock[32767];
+    };
+    char16_t tmp16[257];
+  };
 } forcealign(16);

 COSMOPOLITAN_C_END_
--- a/libc/runtime/winmain.greg.c
+++ b/libc/runtime/winmain.greg.c
@ -24,6 +24,7 @@
 #include "libc/limits.h"
 #include "libc/macros.internal.h"
 #include "libc/nexgen32e/rdtsc.h"
+#include "libc/nt/accounting.h"
 #include "libc/nt/console.h"
 #include "libc/nt/enum/consolemodeflags.h"
 #include "libc/nt/enum/filemapflags.h"
@ -59,6 +60,7 @@ __msabi extern typeof(GetEnvironmentStrings) *const __imp_GetEnvironmentStringsW
 __msabi extern typeof(GetEnvironmentVariable) *const __imp_GetEnvironmentVariableW;
 __msabi extern typeof(GetFileAttributes) *const __imp_GetFileAttributesW;
 __msabi extern typeof(GetStdHandle) *const __imp_GetStdHandle;
+__msabi extern typeof(GetUserName) *const __imp_GetUserNameW;
 __msabi extern typeof(MapViewOfFileEx) *const __imp_MapViewOfFileEx;
 __msabi extern typeof(SetConsoleCP) *const __imp_SetConsoleCP;
 __msabi extern typeof(SetConsoleMode) *const __imp_SetConsoleMode;
@ -142,6 +144,11 @@ static abi void DeduplicateStdioHandles(void) {
  }
 }

+static bool32 HasEnvironmentVariable(const char16_t *name) {
+  char16_t buf[4];
+  return __imp_GetEnvironmentVariableW(name, buf, ARRAYLEN(buf));
+}
+
 // main function of windows init process
 // i.e. first process spawned that isn't forked
 static abi wontreturn void WinInit(const char16_t *cmdline) {
@ -168,12 +175,6 @@ static abi wontreturn void WinInit(const char16_t *cmdline) {
    }
  }

-  // avoid programs like emacs nagging the user to define this
-  char16_t var[8];
-  if (!__imp_GetEnvironmentVariableW(u"TERM", var, 8)) {
-    __imp_SetEnvironmentVariableW(u"TERM", u"xterm-256color");
-  }
-
  // allocate memory for stack and argument block
  _mmi.p = _mmi.s;
  _mmi.n = ARRAYLEN(_mmi.s);
@ -200,6 +201,34 @@ static abi wontreturn void WinInit(const char16_t *cmdline) {
  struct WinArgs *wa =
      (struct WinArgs *)(stackaddr + (stacksize - sizeof(struct WinArgs)));

+  // define $TERM if it's not already present
+  // programs like emacs will stop the world and nag if it's not set
+  if (!HasEnvironmentVariable(u"TERM")) {
+    __imp_SetEnvironmentVariableW(u"TERM", u"xterm-256color");
+  }
+
+  // define $USER as GetUserName() if not set
+  // Windows doesn't define this environment variable by default
+  uint32_t vsize = ARRAYLEN(wa->tmp16);
+  if (!HasEnvironmentVariable(u"USER") &&
+      __imp_GetUserNameW(&wa->tmp16, &vsize)) {
+    __imp_SetEnvironmentVariableW(u"USER", wa->tmp16);
+  }
+
+  // define $HOME as $HOMEDRIVE$HOMEPATH if not set
+  // Windows doesn't define this environment variable by default
+  uint32_t vlen;
+  if (!HasEnvironmentVariable(u"HOME") &&
+      (vlen = __imp_GetEnvironmentVariableW(u"HOMEDRIVE", wa->tmp16,
+                                            ARRAYLEN(wa->tmp16))) <
+          ARRAYLEN(wa->tmp16) &&
+      (vlen += __imp_GetEnvironmentVariableW(u"HOMEPATH", wa->tmp16 + vlen,
+                                             ARRAYLEN(wa->tmp16) - vlen)) <
+          ARRAYLEN(wa->tmp16) &&
+      vlen) {
+    __imp_SetEnvironmentVariableW(u"HOME", wa->tmp16);
+  }
+
  // parse utf-16 command into utf-8 argv array in argument block
  int count = GetDosArgv(cmdline, wa->argblock, ARRAYLEN(wa->argblock),
                         wa->argv, ARRAYLEN(wa->argv));
--- a/libc/stdbool.h
+++ b/libc/stdbool.h
@ -2,15 +2,22 @@
 #define COSMOPOLITAN_LIBC_STDBOOL_H_

 #ifndef __cplusplus
-#if __STDC_VERSION__ + 0 >= 201112
+
 #define bool _Bool
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ > 201710L
+#define true  ((_Bool) + 1u)
+#define false ((_Bool) + 0u)
 #else
-#define bool unsigned char
-#endif
-#define true 1
+#define true  1
 #define false 0
+#endif
+
+#else /* __cplusplus */
+
+#define _Bool bool
+
 #endif /* __cplusplus */

-#define __bool_true_false_are_defined
+#define __bool_true_false_are_defined 1

 #endif /* COSMOPOLITAN_LIBC_STDBOOL_H_ */
--- a/libc/stdio/fmt.c
+++ b/libc/stdio/fmt.c
@ -43,7 +43,6 @@
 #include "libc/fmt/conv.h"
 #include "libc/fmt/divmod10.internal.h"
 #include "libc/fmt/itoa.h"
-#include "libc/serialize.h"
 #include "libc/intrin/bsr.h"
 #include "libc/intrin/nomultics.internal.h"
 #include "libc/intrin/safemacros.internal.h"
@ -53,6 +52,7 @@
 #include "libc/mem/mem.h"
 #include "libc/mem/reverse.internal.h"
 #include "libc/runtime/internal.h"
+#include "libc/serialize.h"
 #include "libc/str/str.h"
 #include "libc/str/strwidth.h"
 #include "libc/str/tab.internal.h"
@ -800,7 +800,7 @@ int __fmt(void *fn, void *arg, const char *format, va_list va) {

  x = 0;
  lasterr = errno;
-  out = fn ? fn : __fmt_noop;
+  out = fn ? fn : (void *)__fmt_noop;

  while (*format) {
    if (*format != '%') {
--- a/libc/stdio/ftw.c
+++ b/libc/stdio/ftw.c
@ -50,5 +50,5 @@ int ftw(const char *dirpath,
 	/* The following cast assumes that calling a function with one
 	 * argument more than it needs behaves as expected. This is
 	 * actually undefined, but works on all real-world machines. */
-	return nftw(dirpath, (int (*)())fn, fd_limit, FTW_PHYS);
+	return nftw(dirpath, (void *)fn, fd_limit, FTW_PHYS);
 }
--- a/libc/stdio/printargs.c
+++ b/libc/stdio/printargs.c
@ -84,6 +84,7 @@ static const char *FindNameById(const struct IdName *names, unsigned long id) {
 }

 static void PrintDependencies(const char *prologue) {
+#ifdef __x86_64__
  struct NtLinkedList *head = &NtGetPeb()->Ldr->InLoadOrderModuleList;
  struct NtLinkedList *ldr = head->Next;
  do {
@ -92,6 +93,7 @@ static void PrintDependencies(const char *prologue) {
    PRINT(" ☼ %.*!hs (%'zukb @ %p)", dll->FullDllName.Length,
          dll->FullDllName.Data, dll->SizeOfImage / 1024, dll->DllBase);
  } while ((ldr = ldr->Next) && ldr != head);
+#endif
 }

 static void Print(const char *prologue) {
@ -624,6 +626,7 @@ textstartup void __printargs(const char *prologue) {
    if (GetConsoleMode(GetStdHandle(kNtStdErrorHandle), &cm))
      PRINT("   %s", DescribeNtConsoleOutFlags(cm));

+#ifdef __x86_64__
    PRINT("");
    PRINT("TEB");
    PRINT(" ☼ gs:0x%02x %s = %p", 0x00, "NtGetSeh()", _NtGetSeh());
@ -640,6 +643,7 @@ textstartup void __printargs(const char *prologue) {
    PRINT(" ☼ gs:0x%02x %s = %p", 0x58, "NtGetTls()", _NtGetTls());
    PRINT(" ☼ gs:0x%02x %s = %p", 0x60, "NtGetPeb()", NtGetPeb());
    PRINT(" ☼ gs:0x%02x %s = %p", 0x68, "NtGetErr()", NtGetErr());
+#endif

    PRINT("");
    PRINT("DEPENDENCIES");
--- a/libc/stdio/rdseed.c
+++ b/libc/stdio/rdseed.c
@ -27,7 +27,7 @@
 *
 * If RDSEED isn't available, we'll try RDRAND (which we automatically
 * disable for microarchitectures where it's known to be slow or buggy).
- * If RDRAND isn't available then we try getrandom(), RtlGenRandom(), or
+ * If RDRAND isn't available then we try getrandom(), ProcessPrng(), or
 * sysctl(KERN_ARND). If those aren't available then we try /dev/urandom
 * and if that fails, we use RDTSC and getpid().
 *
--- a/libc/stdio/rngset.c
+++ b/libc/stdio/rngset.c
@ -45,9 +45,6 @@ dontasan void *rngset(void *b, size_t n, uint64_t seed(void), size_t reseed) {
  size_t m;
  uint64_t x, t = 0;
  unsigned char *p = b;
-  if (IsAsan()) {
-    __asan_verify(b, n);
-  }
  if (!seed) {
    t = reseed;
    reseed = -1;
--- a/libc/stdio/stdio.h
+++ b/libc/stdio/stdio.h
@ -90,7 +90,7 @@ int fsetpos(FILE *, const fpos_t *) libcesque paramsnonnull();
 FILE *tmpfile(void) libcesque __wur;
 char *tmpnam(char *) libcesque __wur;
 char *tmpnam_r(char *) libcesque __wur;
-int system(const char *) libcesque;
+
 FILE *popen(const char *, const char *) libcesque;

 /*───────────────────────────────────────────────────────────────────────────│─╗
--- a/libc/stdio/tmpnam.c
+++ b/libc/stdio/tmpnam.c
@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/stdio/rand.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
@ -35,7 +34,6 @@ static char g_tmpnam[L_tmpnam];
 *     is only mutated on success
 */
 char *tmpnam(char *buf) {
-  if (IsAsan()) __asan_verify(buf, L_tmpnam);
  char path[] = P_tmpdir "/tmpnam_XXXXXX";
  for (int t = 0; t < 100; ++t) {
    int w = _rand64();
--- a/libc/str/BUILD.mk
+++ b/libc/str/BUILD.mk
@ -88,7 +88,7 @@ o/$(MODE)/libc/str/windowstimetotimespec.o: private		\
 			-O2

 $(LIBC_STR_A_OBJS): private					\
-		COPTS +=					\
+		CFLAGS +=					\
 			-fno-sanitize=all			\
 			-Wframe-larger-than=4096		\
 			-Walloca-larger-than=4096
--- a/libc/str/djbsort.c
+++ b/libc/str/djbsort.c
@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/nexgen32e/x86feature.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdckdint.h"
@ -28,11 +27,6 @@ void djbsort_avx2(int32_t *, long);
 * D.J. Bernstein's outrageously fast integer sorting algorithm.
 */
 void djbsort(int32_t *a, size_t n) {
-  size_t m;
-  if (IsAsan()) {
-    if (ckd_mul(&m, n, 4)) m = -1;
-    __asan_verify(a, m);
-  }
  if (n > 1) {
 #if defined(__x86_64__) && !defined(__chibicc__)
    if (X86_HAVE(AVX2)) {
--- a/libc/str/isutf8.c
+++ b/libc/str/isutf8.c
@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/intrin/likely.h"
 #include "libc/str/str.h"

@ -53,7 +52,6 @@ bool32 isutf8(const void *data, size_t size) {
  long c;
  const char *p, *e;
  if (size == -1) size = data ? strlen(data) : 0;
-  if (IsAsan()) __asan_verify(data, size);
  p = data;
  e = p + size;
  while (p < e) {
--- a/libc/str/memmem.c
+++ b/libc/str/memmem.c
@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/intrin/likely.h"
 #include "libc/str/str.h"

@ -32,16 +31,14 @@ typedef char xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
 * @param needlelen is its character count
 * @return pointer to first result or NULL if not found
 */
-void *memmem(const void *haystack, size_t haystacklen,
-                      const void *needle, size_t needlelen) {
+__vex void *memmem(const void *haystack, size_t haystacklen, const void *needle,
+                   size_t needlelen) {
 #if defined(__x86_64__) && !defined(__chibicc__)
  char c;
  xmm_t n;
  const xmm_t *v;
  unsigned i, k, m;
  const char *p, *q, *e;
-  if (IsAsan()) __asan_verify(needle, needlelen);
-  if (IsAsan()) __asan_verify(haystack, haystacklen);
  if (!needlelen) return (void *)haystack;
  if (UNLIKELY(needlelen > haystacklen)) return 0;
  q = needle;
--- a/libc/str/memrchr16.c
+++ b/libc/str/memrchr16.c
@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/limits.h"
 #include "libc/nexgen32e/x86feature.h"
 #include "libc/str/str.h"
@ -36,8 +35,8 @@ static inline const char16_t *memrchr16_pure(const char16_t *s, char16_t c,
 }

 #if defined(__x86_64__) && !defined(__chibicc__)
-static inline const char16_t *memrchr16_sse(const char16_t *s,
-                                                     char16_t c, size_t n) {
+static inline const char16_t *memrchr16_sse(const char16_t *s, char16_t c,
+                                            size_t n) {
  size_t i;
  unsigned m;
  xmm_t v, t = {c, c, c, c, c, c, c, c};
@ -67,11 +66,10 @@ static inline const char16_t *memrchr16_sse(const char16_t *s,
 * @return is pointer to first instance of c or NULL if not found
 * @asyncsignalsafe
 */
-void *memrchr16(const void *s, int c, size_t n) {
+__vex void *memrchr16(const void *s, int c, size_t n) {
 #if defined(__x86_64__) && !defined(__chibicc__)
  const void *r;
  if (!IsTiny() && X86_HAVE(SSE)) {
-    if (IsAsan()) __asan_verify(s, n * 2);
    r = memrchr16_sse(s, c, n);
  } else {
    r = memrchr16_pure(s, c, n);
--- a/libc/str/rawmemchr.c
+++ b/libc/str/rawmemchr.c
@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/nexgen32e/x86feature.h"
 #include "libc/str/str.h"

@ -33,8 +32,7 @@ static inline const unsigned char *rawmemchr_pure(const unsigned char *s,

 #if defined(__x86_64__) && !defined(__chibicc__)
 typedef char xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
-static inline const char *rawmemchr_sse(const char *s,
-                                                 unsigned char c) {
+static inline const char *rawmemchr_sse(const char *s, unsigned char c) {
  unsigned k;
  unsigned m;
  const xmm_t *p;
@ -67,11 +65,10 @@ static inline uint64_t UncheckedAlignedRead64(const unsigned char *p) {
 * @param c is search byte which is masked with 255
 * @return is pointer to first instance of c
 */
-void *rawmemchr(const void *s, int c) {
+__vex void *rawmemchr(const void *s, int c) {
 #if defined(__x86_64__) && !defined(__chibicc__)
  const void *r;
  if (X86_HAVE(SSE)) {
-    if (IsAsan()) __asan_verify(s, 1);
    r = rawmemchr_sse(s, c);
  } else {
    r = rawmemchr_pure(s, c);
--- a/libc/str/str.h
+++ b/libc/str/str.h
@ -167,7 +167,7 @@ wint_t towctrans(wint_t, wctrans_t) libcesque;

 int getsubopt(char **, char *const *, char **) libcesque paramsnonnull();
 char *strsignal(int) returnsnonnull libcesque;
-char *strerror(int) returnsnonnull dontthrow nocallback;
+char *strerror(int) returnsnonnull dontthrow dontcallback;
 errno_t strerror_r(int, char *, size_t) libcesque;
 char *__xpg_strerror_r(int, char *, size_t) libcesque;

--- a/libc/str/strcasecmp.c
+++ b/libc/str/strcasecmp.c
@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/str/str.h"
 #include "libc/str/tab.internal.h"

@ -34,8 +33,6 @@ int strcasecmp(const char *a, const char *b) {
  size_t i = 0;
  uint64_t v, w;
  if (a == b) return 0;
-  if (IsAsan()) __asan_verify_str(a);
-  if (IsAsan()) __asan_verify_str(b);
  if (((uintptr_t)a & 7) == ((uintptr_t)b & 7)) {
    for (; (uintptr_t)(a + i) & 7; ++i) {
    CheckEm:
--- a/libc/str/strcasestr.c
+++ b/libc/str/strcasestr.c
@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/str/str.h"
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/str/tab.internal.h"

 typedef char xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
@ -35,15 +34,13 @@ typedef char xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
 * @asyncsignalsafe
 * @see strstr()
 */
-char *strcasestr(const char *haystack, const char *needle) {
+__vex char *strcasestr(const char *haystack, const char *needle) {
 #if defined(__x86_64__) && !defined(__chibicc__)
  char c;
  size_t i;
  unsigned k, m;
  const xmm_t *p;
  xmm_t v, n1, n2, z = {0};
-  if (IsAsan()) __asan_verify(needle, 1);
-  if (IsAsan()) __asan_verify(haystack, 1);
  if (haystack == needle || !*needle) return (char *)haystack;
  c = *needle;
  n1 = (xmm_t){c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c};
--- a/libc/str/strlen16.c
+++ b/libc/str/strlen16.c
@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/str/str.h"

 typedef char16_t xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
@ -29,17 +28,15 @@ typedef char16_t xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
 * @return number of shorts (excluding NUL)
 * @asyncsignalsafe
 */
-size_t strlen16(const char16_t *s) {
+__vex size_t strlen16(const char16_t *s) {
 #if defined(__x86_64__) && !defined(__chibicc__)
  size_t n;
  xmm_t z = {0};
  unsigned m, k = (uintptr_t)s & 15;
  const xmm_t *p = (const xmm_t *)((uintptr_t)s & -16);
-  if (IsAsan()) __asan_verify(s, 2);
  m = __builtin_ia32_pmovmskb128(*p == z) >> k << k;
  while (!m) m = __builtin_ia32_pmovmskb128(*++p == z);
  n = (const char16_t *)p + (__builtin_ctzl(m) >> 1) - s;
-  if (IsAsan()) __asan_verify(s, n * 2);
  return n;
 #else
  size_t n = 0;
--- a/libc/str/strnlen_s.c
+++ b/libc/str/strnlen_s.c
@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/str/str.h"

 static size_t strnlen_s_x64(const char *s, size_t n, size_t i) {
@ -48,7 +47,6 @@ static size_t strnlen_s_x64(const char *s, size_t n, size_t i) {
 size_t strnlen_s(const char *s, size_t n) {
  size_t i;
  if (!s) return 0;
-  if (IsAsan()) __asan_verify(s, n);
  for (i = 0; (uintptr_t)(s + i) & 7; ++i) {
    if (i == n || !s[i]) return i;
  }
--- a/libc/str/strstr.c
+++ b/libc/str/strstr.c
@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/str/str.h"
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"

 typedef char xmm_t __attribute__((__vector_size__(16), __aligned__(16)));

@ -35,14 +34,12 @@ typedef char xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
 * @see strcasestr()
 * @see memmem()
 */
-char *strstr(const char *haystack, const char *needle) {
+__vex char *strstr(const char *haystack, const char *needle) {
 #if defined(__x86_64__) && !defined(__chibicc__)
  size_t i;
  unsigned k, m;
  const xmm_t *p;
  xmm_t v, n, z = {0};
-  if (IsAsan()) __asan_verify(needle, 1);
-  if (IsAsan()) __asan_verify(haystack, 1);
  if (haystack == needle || !*needle) return (char *)haystack;
  n = (xmm_t){*needle, *needle, *needle, *needle, *needle, *needle,
              *needle, *needle, *needle, *needle, *needle, *needle,
--- a/libc/str/wcslen.c
+++ b/libc/str/wcslen.c
@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/str/str.h"

 typedef wchar_t xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
@ -29,17 +28,15 @@ typedef wchar_t xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
 * @return number of wide characters (excluding NUL)
 * @asyncsignalsafe
 */
-size_t wcslen(const wchar_t *s) {
+__vex size_t wcslen(const wchar_t *s) {
 #if defined(__x86_64__) && !defined(__chibicc__)
  size_t n;
  xmm_t z = {0};
  unsigned m, k = (uintptr_t)s & 15;
  const xmm_t *p = (const xmm_t *)((uintptr_t)s & -16);
-  if (IsAsan()) __asan_verify(s, 4);
  m = __builtin_ia32_pmovmskb128(*p == z) >> k << k;
  while (!m) m = __builtin_ia32_pmovmskb128(*++p == z);
  n = (const wchar_t *)p + (__builtin_ctzl(m) >> 2) - s;
-  if (IsAsan()) __asan_verify(s, n);
  return n;
 #else
  size_t n = 0;
--- a/libc/str/wmemrchr.c
+++ b/libc/str/wmemrchr.c
@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/limits.h"
 #include "libc/nexgen32e/x86feature.h"
 #include "libc/stdckdint.h"
@ -38,7 +37,7 @@ static inline const wchar_t *wmemrchr_pure(const wchar_t *s, wchar_t c,

 #if defined(__x86_64__) && !defined(__chibicc__)
 static inline const wchar_t *wmemrchr_sse(const wchar_t *s, wchar_t c,
-                                                   size_t n) {
+                                          size_t n) {
  size_t i;
  unsigned m;
  xmm_t v, t = {c, c, c, c};
@ -68,16 +67,9 @@ static inline const wchar_t *wmemrchr_sse(const wchar_t *s, wchar_t c,
 * @return is pointer to first instance of c or NULL if not found
 * @asyncsignalsafe
 */
-void *wmemrchr(const wchar_t *s, wchar_t c, size_t n) {
+__vex void *wmemrchr(const wchar_t *s, wchar_t c, size_t n) {
 #if defined(__x86_64__) && !defined(__chibicc__)
-  size_t bytes;
-  const void *r;
-  if (IsAsan()) {
-    if (ckd_mul(&bytes, n, sizeof(wchar_t))) bytes = -1;
-    __asan_verify(s, bytes);
-  }
-  r = wmemrchr_sse(s, c, n);
-  return (void *)r;
+  return (void *)wmemrchr_sse(s, c, n);
 #else
  return (void *)wmemrchr_pure(s, c, n);
 #endif
--- a/libc/sysv/consts.sh
+++ b/libc/sysv/consts.sh
@ -234,7 +234,9 @@ syscon	mmap	MAP_INHERIT				-1			-1			-1			-1			-1			-1			0x00000080		-1			# make
 syscon	mmap	MAP_HASSEMAPHORE			0			0			0x00000200		0x00000200		0x00000200		0			0x00000200		0			# does it matter on x86?
 syscon	mmap	MAP_NOSYNC				0			0			0			0			0x00000800		0			0			0			# flush to physical media only when necessary rather than gratuitously; be sure to use write() rather than ftruncate() with this!
 syscon	mmap	MAP_CONCEAL				0			0			0			0			0x00020000		0x00008000		0x00008000		0			# omit from core dumps; MAP_NOCORE on FreeBSD
-syscon	mmap	MAP_JIT					0			0			0			0x00000800		0			0			0			0			# omit from core dumps; MAP_NOCORE on FreeBSD
+syscon	mmap	MAP_JIT					0			0			0			0x00000800		0			0			0			0			# allocate region used for just-in-time compilation
+syscon	mmap	MAP_NOCACHE				0			0			0x00000400		0x00000400		0			0			0			0			# don't cache pages for this mapping
+syscon	mmap	MAP_NOEXTEND				0			0			0x00000100		0x00000100		0			0			0			0			# for MAP_FILE, don't change file size
 syscon	compat	MAP_NOCORE				0			0			0			0			0x00020000		0x00008000		0x00008000		0			# use MAP_CONCEAL
 syscon	compat	MAP_ANON				0x00000020		0x00000020		0x00001000		0x00001000		0x00001000		0x00001000		0x00001000		0x00000020		# bsd consensus; faked nt
 syscon	compat	MAP_EXECUTABLE				0x00001000		0x00001000		0			0			0			0			0			0			# ignored
@ -269,17 +271,18 @@ syscon	madv	MADV_WIPEONFORK				18			18			127			127			127			127			127			127			# T
 syscon	madv	MADV_KEEPONFORK				19			19			127			127			127			127			127			127			# TODO: add support ?
 syscon	madv	MADV_COLD				20			20			127			127			127			127			127			127			# TODO: add support ?
 syscon	madv	MADV_PAGEOUT				21			21			127			127			127			127			127			127			# TODO: add support ?
-syscon	madv	MADV_POPULATE_READ				22			22			127			127			127			127			127			127			# TODO: add support ?
-syscon	madv	MADV_POPULATE_WRITE				23			23			127			127			127			127			127			127			# TODO: add support ?
-syscon	madv	MADV_DONTNEED_LOCKED				24			24			127			127			127			127			127			127			# TODO: add support ?
+syscon	madv	MADV_POPULATE_READ			22			22			127			127			127			127			127			127			# TODO: add support ?
+syscon	madv	MADV_POPULATE_WRITE			23			23			127			127			127			127			127			127			# TODO: add support ?
+syscon	madv	MADV_DONTNEED_LOCKED			24			24			127			127			127			127			127			127			# TODO: add support ?
 syscon	madv	MADV_COLLAPSE				25			25			127			127			127			127			127			127			# TODO: add support ?
 syscon	madv	MADV_DOFORK				11			11			127			127			127			127			127			127			# TODO(jart): what is it?
 syscon	madv	MADV_DONTDUMP				16			16			127			127			127			127			127			127			# see MAP_CONCEAL in OpenBSD; TODO(jart): what is it?
 syscon	madv	MADV_DONTFORK				10			10			127			127			127			127			127			127			# TODO(jart): what is it?
 syscon	madv	MADV_HWPOISON				100			100			127			127			127			127			127			127			# TODO(jart): what is it?
-syscon	madv	MADV_SOFT_OFFLINE				101			101			127			127			127			127			127			127			# TODO: add support ?
+syscon	madv	MADV_SOFT_OFFLINE			101			101			127			127			127			127			127			127			# TODO: add support ?
 syscon	madv	MADV_REMOVE				9			9			127			127			127			127			127			127			# TODO(jart): what is it?
 syscon	fadv	POSIX_FADV_NOREUSE			5			5			127			127			5			127			5			127			# wut
+syscon	madv	MADV_REMOVE				9			9			127			127			127			127			127			127			# TODO(jart): what is it?

 #	mmap(), mprotect(), etc.
 #	digital restrictions management for the people
@ -579,19 +582,19 @@ syscon	clock	CLOCK_REALTIME				0			0			0			0			0			0			0			0			# consensus
 syscon	clock	CLOCK_REALTIME_PRECISE			0			0			0			0			9			0			0			0			#
 syscon	clock	CLOCK_REALTIME_FAST			0			0			0			0			10			0			0			0			#
 syscon	clock	CLOCK_REALTIME_COARSE			5			5			0			0			10			0			0			2			# Linux 2.6.32+; bsd consensus; not available on RHEL5
-syscon	clock	CLOCK_MONOTONIC				1			1			1			6			4			3			3			1			# XNU/NT faked; could move backwards if NTP introduces negative leap second
-syscon	clock	CLOCK_MONOTONIC_PRECISE			1			1			1			6			11			3			3			1			#
-syscon	clock	CLOCK_MONOTONIC_FAST			1			1			1			6			12			3			3			1			#
-syscon	clock	CLOCK_MONOTONIC_COARSE			6			6			1			6			12			3			3			1			# Linux 2.6.32+; bsd consensus; not available on RHEL5
-syscon	clock	CLOCK_MONOTONIC_RAW			4			4			127			4			127			127			127			127			# actually monotonic; not subject to NTP adjustments; Linux 2.6.28+; XNU/NT/FreeBSD/OpenBSD faked; not available on RHEL5
-syscon	clock	CLOCK_PROCESS_CPUTIME_ID		2			2			127			12			15			2			0x40000000		127			# NetBSD lets you bitwise a PID into clockid_t
-syscon	clock	CLOCK_THREAD_CPUTIME_ID			3			3			127			16			14			4			0x20000000		127			#
+syscon	clock	CLOCK_MONOTONIC				1			1			6			6			4			3			3			1			# XNU/NT faked; could move backwards if NTP introduces negative leap second
+syscon	clock	CLOCK_MONOTONIC_PRECISE			1			1			6			6			11			3			3			1			#
+syscon	clock	CLOCK_MONOTONIC_FAST			1			1			6			6			12			3			3			1			#
+syscon	clock	CLOCK_MONOTONIC_COARSE			6			6			5			5			12			3			3			1			# Linux 2.6.32+; bsd consensus; not available on RHEL5
+syscon	clock	CLOCK_MONOTONIC_RAW			4			4			4			4			127			127			127			127			# actually monotonic; not subject to NTP adjustments; Linux 2.6.28+; XNU/NT/FreeBSD/OpenBSD faked; not available on RHEL5
+syscon	clock	CLOCK_PROCESS_CPUTIME_ID		2			2			12			12			15			2			0x40000000		4			# NetBSD lets you bitwise a PID into clockid_t
+syscon	clock	CLOCK_THREAD_CPUTIME_ID			3			3			16			16			14			4			0x20000000		5			#
 syscon	clock	CLOCK_PROF				127			127			127			127			2			127			2			127			#
 syscon	clock	CLOCK_BOOTTIME				7			7			7			127			127			6			127			3			#
 syscon	clock	CLOCK_REALTIME_ALARM			8			8			127			127			127			127			127			127			#
 syscon	clock	CLOCK_BOOTTIME_ALARM			9			9			127			127			127			127			127			127			#
 syscon	clock	CLOCK_TAI				11			11			127			127			127			127			127			127			#
-syscon	clock	CLOCK_UPTIME				127			127			127			127			5			5			127			127			#
+syscon	clock	CLOCK_UPTIME				127			127			8			8			5			5			127			127			#
 syscon	clock	CLOCK_UPTIME_PRECISE			127			127			127			127			7			127			127			127			#
 syscon	clock	CLOCK_UPTIME_FAST			127			127			127			127			8			127			127			127			#
 syscon	clock	CLOCK_SECOND				127			127			127			127			13			127			127			127			#
--- a/libc/sysv/consts/CLOCK_MONOTONIC.S
+++ b/libc/sysv/consts/CLOCK_MONOTONIC.S
@ -1,2 +1,2 @@
 #include "libc/sysv/consts/syscon.internal.h"
-.syscon clock,CLOCK_MONOTONIC,1,1,1,6,4,3,3,1
+.syscon clock,CLOCK_MONOTONIC,1,1,6,6,4,3,3,1
--- a/libc/sysv/consts/CLOCK_MONOTONIC_COARSE.S
+++ b/libc/sysv/consts/CLOCK_MONOTONIC_COARSE.S
@ -1,2 +1,2 @@
 #include "libc/sysv/consts/syscon.internal.h"
-.syscon clock,CLOCK_MONOTONIC_COARSE,6,6,1,6,12,3,3,1
+.syscon clock,CLOCK_MONOTONIC_COARSE,6,6,5,5,12,3,3,1
--- a/libc/sysv/consts/CLOCK_MONOTONIC_FAST.S
+++ b/libc/sysv/consts/CLOCK_MONOTONIC_FAST.S
@ -1,2 +1,2 @@
 #include "libc/sysv/consts/syscon.internal.h"
-.syscon clock,CLOCK_MONOTONIC_FAST,1,1,1,6,12,3,3,1
+.syscon clock,CLOCK_MONOTONIC_FAST,1,1,6,6,12,3,3,1
--- a/libc/sysv/consts/CLOCK_MONOTONIC_PRECISE.S
+++ b/libc/sysv/consts/CLOCK_MONOTONIC_PRECISE.S
@ -1,2 +1,2 @@
 #include "libc/sysv/consts/syscon.internal.h"
-.syscon clock,CLOCK_MONOTONIC_PRECISE,1,1,1,6,11,3,3,1
+.syscon clock,CLOCK_MONOTONIC_PRECISE,1,1,6,6,11,3,3,1
--- a/Show more
+++ b/Show more