Clean up more code

- Found some bugs in LLVM compiler-rt library
- The useless LIBC_STUBS package is now deleted
- Improve the overflow checking story even further
- Get chibicc tests working in MODE=dbg mode again
- The libc/isystem/ headers now have correctly named guards

Makefile

@@ -113,8 +113,7 @@ include build/functions.mk			#─┐
 include build/definitions.mk			# ├──META
 include build/config.mk				# │  You can build
 include build/rules.mk				# │  You can topologically order
-include build/online.mk				# │
+include build/online.mk				#─┘
-include libc/stubs/stubs.mk			#─┘
 include libc/nexgen32e/nexgen32e.mk		#─┐
 include libc/sysv/sysv.mk			# ├──SYSTEM SUPPORT
 include libc/nt/nt.mk				# │  You can do math
@@ -214,7 +213,6 @@ include tool/lambda/lambda.mk
 include tool/plinko/lib/lib.mk
 include tool/plinko/plinko.mk
 include test/tool/plinko/test.mk
-include tool/hash/hash.mk
 include tool/net/net.mk
 include tool/viz/viz.mk
 include tool/tool.mk

dsp/bmp/bmp.mk

@@ -25,8 +25,7 @@ DSP_BMP_A_CHECKS =				\
 
 DSP_BMP_A_DIRECTDEPS =				\
 	LIBC_NEXGEN32E				\
-	LIBC_TINYMATH				\
+	LIBC_TINYMATH
-	LIBC_STUBS
 
 DSP_BMP_A_DEPS :=				\
 	$(call uniq,$(foreach x,$(DSP_BMP_A_DIRECTDEPS),$($(x))))

dsp/core/core.mk

@@ -20,8 +20,7 @@ DSP_CORE_A_DIRECTDEPS =				\
 	LIBC_MEM				\
 	LIBC_NEXGEN32E				\
 	LIBC_STR				\
-	LIBC_TINYMATH				\
+	LIBC_TINYMATH
-	LIBC_STUBS
 
 DSP_CORE_A_DEPS :=				\
 	$(call uniq,$(foreach x,$(DSP_CORE_A_DIRECTDEPS),$($(x))))

dsp/mpeg/mpeg.mk

@@ -34,7 +34,6 @@ DSP_MPEG_A_DIRECTDEPS =				\
 	LIBC_RUNTIME				\
 	LIBC_STDIO				\
 	LIBC_STR				\
-	LIBC_STUBS				\
 	LIBC_SYSV				\
 	LIBC_TIME				\
 	LIBC_TINYMATH				\

dsp/scale/scale.mk

@@ -31,8 +31,6 @@ DSP_SCALE_A_DIRECTDEPS =			\
 	LIBC_NEXGEN32E				\
 	LIBC_RUNTIME				\
 	LIBC_STR				\
-	LIBC_STUBS				\
-	LIBC_STUBS				\
 	LIBC_TIME				\
 	LIBC_TINYMATH				\
 	LIBC_X

dsp/tty/tty.mk

@@ -35,7 +35,6 @@ DSP_TTY_A_DIRECTDEPS =				\
 	LIBC_NT_KERNEL32			\
 	LIBC_STR				\
 	LIBC_STDIO				\
-	LIBC_STUBS				\
 	LIBC_SOCK				\
 	LIBC_SYSV				\
 	LIBC_TINYMATH				\

examples/clock.c

@@ -7,10 +7,10 @@
 │   • http://creativecommons.org/publicdomain/zero/1.0/            │
 ╚─────────────────────────────────────────────────────────────────*/
 #endif
+#include "libc/calls/calls.h"
 #include "libc/calls/struct/timespec.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
-#include "libc/time/time.h"
 
 /**
  * @fileoverview clock() function demo

examples/examples.mk

@@ -59,7 +59,6 @@ EXAMPLES_DIRECTDEPS =								\
 	LIBC_SOCK								\
 	LIBC_STDIO								\
 	LIBC_STR								\
-	LIBC_STUBS								\
 	LIBC_SYSV								\
 	LIBC_SYSV_CALLS								\
 	LIBC_TESTLIB								\
@@ -77,10 +76,10 @@ EXAMPLES_DIRECTDEPS =								\
 	THIRD_PARTY_DOUBLECONVERSION						\
 	THIRD_PARTY_GDTOA							\
 	THIRD_PARTY_GETOPT							\
+	THIRD_PARTY_HIREDIS							\
 	THIRD_PARTY_LIBCXX							\
 	THIRD_PARTY_LINENOISE							\
 	THIRD_PARTY_LUA								\
-	THIRD_PARTY_HIREDIS							\
 	THIRD_PARTY_MBEDTLS							\
 	THIRD_PARTY_MUSL							\
 	THIRD_PARTY_NSYNC							\

examples/package/build.mk

@@ -43,7 +43,6 @@ EXAMPLES_PACKAGE_DIRECTDEPS =				\
 	EXAMPLES_PACKAGE_LIB				\
 	LIBC_INTRIN					\
 	LIBC_STDIO					\
-	LIBC_STUBS					\
 	LIBC_TINYMATH
 
 # Evaluates the set of transitive package dependencies.

examples/package/lib/build.mk

@@ -69,10 +69,9 @@ EXAMPLES_PACKAGE_LIB_A_CHECKS =					\
 # Lists packages whose symbols are or may be directly referenced here.
 # Note that linking stubs is always a good idea due to synthetic code.
 EXAMPLES_PACKAGE_LIB_A_DIRECTDEPS =				\
-	LIBC_STDIO						\
 	LIBC_INTRIN						\
 	LIBC_NEXGEN32E						\
-	LIBC_STUBS
+	LIBC_STDIO
 
 # Evaluates variable as set of transitive package dependencies.
 EXAMPLES_PACKAGE_LIB_A_DEPS :=					\

examples/whois.c

@@ -32,7 +32,6 @@
 #include "libc/dns/dns.h"
 #include "libc/errno.h"
 #include "libc/log/bsd.h"
-#include "libc/mem/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
 #include "libc/sock/struct/pollfd.h"

libc/calls/calls.h

@@ -40,6 +40,8 @@
 #define SIG_DFL ((void (*)(int))0)
 #define SIG_IGN ((void (*)(int))1)
 
+#define CLOCKS_PER_SEC 1000000L
+
 #define MAP_FAILED ((void *)-1)
 
 #define WCOREDUMP(s)    (128 & (s))
@@ -174,6 +176,8 @@ int usleep(unsigned);
 int vfork(void) returnstwice;
 int wait(int *);
 int waitpid(int, int *, int);
+int64_t clock(void);
+int64_t time(int64_t *);
 ssize_t copy_file_range(int, long *, int, long *, size_t, unsigned);
 ssize_t lseek(int, int64_t, int);
 ssize_t pread(int, void *, size_t, int64_t);
@@ -183,10 +187,12 @@ ssize_t readlink(const char *, char *, size_t);
 ssize_t readlinkat(int, const char *, char *, size_t);
 ssize_t splice(int, int64_t *, int, int64_t *, size_t, unsigned);
 ssize_t write(int, const void *, size_t);
+unsigned alarm(unsigned);
 unsigned getegid(void) nosideeffect;
 unsigned geteuid(void) nosideeffect;
 unsigned getgid(void) nosideeffect;
 unsigned getuid(void) libcesque;
+unsigned sleep(unsigned);
 unsigned umask(unsigned);
 void sync(void);
 

libc/calls/calls.mk

@@ -45,13 +45,12 @@ LIBC_CALLS_A_DIRECTDEPS =				\
 	LIBC_NT_KERNEL32				\
 	LIBC_NT_NTDLL					\
 	LIBC_NT_PDH					\
-	LIBC_NT_PSAPI					\
 	LIBC_NT_POWRPROF				\
+	LIBC_NT_PSAPI					\
 	LIBC_NT_WS2_32					\
 	LIBC_STR					\
-	LIBC_STUBS					\
-	LIBC_SYSV_CALLS					\
 	LIBC_SYSV					\
+	LIBC_SYSV_CALLS					\
 	THIRD_PARTY_COMPILER_RT
 
 LIBC_CALLS_A_DEPS :=					\

libc/calls/copy.c

@@ -18,6 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
 #include "libc/macros.internal.h"
+#include "libc/runtime/runtime.h"
 
 /**
  * Copies data between file descriptors the old fashioned way.
@@ -43,7 +44,7 @@ ssize_t copyfd(int in, int out, size_t n) {
     if (dw != dr) {
       // POSIX requires atomic IO up to PIPE_BUF
       // The minimum permissible PIPE_BUF is 512
-      __builtin_trap();
+      abort();
     }
   }
   return i;

libc/calls/now.c

@@ -33,6 +33,8 @@
 #include "libc/thread/tls.h"
 #include "libc/time/time.h"
 
+// TODO(jart): DELETE
+
 static clock_gettime_f *__gettime;
 
 static struct Now {

libc/calls/oldbench.c

@@ -31,6 +31,8 @@
 #include "libc/thread/tls.h"
 #include "libc/time/time.h"
 
+// TODO(jart): DELETE
+
 static struct Now {
   bool once;
   uint64_t k0;

libc/calls/weirdtypes.h

@@ -6,44 +6,44 @@
  * @fileoverview Types we'd prefer hadn't been invented.
  */
 
-#define blkcnt_t      int64_t
+typedef int64_t blkcnt_t;
-#define cc_t          uint8_t
+typedef uint8_t cc_t;
-#define clock_t       int64_t  /* uint64_t on xnu */
+typedef int64_t clock_t; /* uint64_t on xnu */
-#define dev_t         uint64_t /* int32_t on xnu */
+typedef uint64_t dev_t;  /* int32_t on xnu */
-#define fsblkcnt_t    uint64_t
+typedef uint64_t fsblkcnt_t;
-#define fsfilcnt_t    int64_t /* uint32_t on xnu */
+typedef int64_t fsfilcnt_t; /* uint32_t on xnu */
-#define gid_t         uint32_t
+typedef uint32_t gid_t;
-#define id_t          uint32_t /* int32_t on linux/freebsd/etc. */
+typedef uint32_t id_t; /* int32_t on linux/freebsd/etc. */
-#define in_addr_t     uint32_t
+typedef uint32_t in_addr_t;
-#define in_addr_t     uint32_t
+typedef uint32_t in_addr_t;
-#define in_port_t     uint16_t
+typedef uint16_t in_port_t;
-#define ino_t         uint64_t
+typedef uint64_t ino_t;
-#define key_t         int32_t
+typedef int32_t key_t;
-#define loff_t        int64_t
+typedef int64_t loff_t;
-#define mode_t        uint32_t /* uint16_t on xnu */
+typedef uint32_t mode_t; /* uint16_t on xnu */
-#define nfds_t        uint64_t
+typedef uint64_t nfds_t;
-#define off_t         int64_t
+typedef int64_t off_t;
-#define pid_t         int32_t
+typedef int32_t pid_t;
-#define register_t    int64_t
+typedef int64_t register_t;
-#define sa_family_t   uint16_t /* bsd:uint8_t */
+typedef uint16_t sa_family_t; /* bsd:uint8_t */
-#define socklen_t     uint32_t
+typedef uint32_t socklen_t;
-#define speed_t       uint32_t
+typedef uint32_t speed_t;
-#define suseconds_t   int64_t  /* int32_t on xnu */
+typedef int64_t suseconds_t;   /* int32_t on xnu */
-#define useconds_t    uint64_t /* uint32_t on xnu */
+typedef uint64_t useconds_t;   /* uint32_t on xnu */
-#define syscall_arg_t int64_t  /* uint64_t on xnu */
+typedef int64_t syscall_arg_t; /* uint64_t on xnu */
-#define tcflag_t      uint32_t
+typedef uint32_t tcflag_t;
-#define time_t        int64_t
+typedef int64_t time_t;
-#define timer_t       void*
+typedef void *timer_t;
-#define uid_t         uint32_t
+typedef uint32_t uid_t;
-#define rlim_t        uint64_t /* int64_t on bsd */
+typedef uint64_t rlim_t; /* int64_t on bsd */
-#define clockid_t     int32_t
+typedef int32_t clockid_t;
 
 #ifdef __x86_64__
-#define blksize_t int64_t /* int32_t on xnu */
+typedef int64_t blksize_t; /* int32_t on xnu */
-#define nlink_t   uint64_t
+typedef uint64_t nlink_t;
 #elif defined(__aarch64__)
-#define blksize_t int32_t
+typedef int32_t blksize_t;
-#define nlink_t   uint32_t /* uint16_t on xnu */
+typedef uint32_t nlink_t; /* uint16_t on xnu */
 #endif
 
 #define TIME_T_MAX __INT64_MAX__

libc/dns/dns.mk

@@ -26,17 +26,16 @@ LIBC_DNS_A_CHECKS =				\
 LIBC_DNS_A_DIRECTDEPS =				\
 	LIBC_CALLS				\
 	LIBC_FMT				\
+	LIBC_INTRIN				\
 	LIBC_MEM				\
 	LIBC_NEXGEN32E				\
+	LIBC_NT_ADVAPI32			\
+	LIBC_NT_KERNEL32			\
 	LIBC_RUNTIME				\
 	LIBC_SOCK				\
 	LIBC_STDIO				\
-	LIBC_INTRIN				\
-	LIBC_STUBS				\
 	LIBC_STR				\
-	LIBC_SYSV				\
+	LIBC_SYSV
-	LIBC_NT_ADVAPI32			\
-	LIBC_NT_KERNEL32
 
 LIBC_DNS_A_DEPS :=				\
 	$(call uniq,$(foreach x,$(LIBC_DNS_A_DIRECTDEPS),$($(x))))

libc/elf/elf.h

@@ -4,30 +4,23 @@
 #include "libc/elf/struct/phdr.h"
 #include "libc/elf/struct/shdr.h"
 #include "libc/elf/struct/sym.h"
-#include "libc/runtime/ezmap.internal.h"
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 #ifdef COSMO
-
 /*───────────────────────────────────────────────────────────────────────────│─╗
-│ cosmopolitan § executable & linkable format                              ─╬─│┼
+│ cosmopolitan § executable linkable format                                ─╬─│┼
 ╚────────────────────────────────────────────────────────────────────────────│*/
 
-char *GetElfStringTable(const Elf64_Ehdr *, size_t);
+char *GetElfStringTable(const Elf64_Ehdr *, size_t, const char *);
-char *GetElfStrs(const Elf64_Ehdr *, size_t, size_t *);
+Elf64_Sym *GetElfSymbolTable(const Elf64_Ehdr *, size_t, int, Elf64_Xword *);
-Elf64_Sym *GetElfSymbolTable(const Elf64_Ehdr *, size_t, Elf64_Xword *);
 bool IsElf64Binary(const Elf64_Ehdr *, size_t);
 bool IsElfSymbolContent(const Elf64_Sym *);
-Elf64_Phdr *GetElfSegmentHeaderAddress(const Elf64_Ehdr *, size_t, Elf64_Half);
+Elf64_Phdr *GetElfProgramHeaderAddress(const Elf64_Ehdr *, size_t, Elf64_Half);
 Elf64_Shdr *GetElfSectionHeaderAddress(const Elf64_Ehdr *, size_t, Elf64_Half);
 void *GetElfSectionAddress(const Elf64_Ehdr *, size_t, const Elf64_Shdr *);
 char *GetElfSectionNameStringTable(const Elf64_Ehdr *, size_t);
-void GetElfVirtualAddressRange(const Elf64_Ehdr *, size_t, intptr_t *,
-                               intptr_t *);
 char *GetElfString(const Elf64_Ehdr *, size_t, const char *, Elf64_Word);
 const char *GetElfSectionName(const Elf64_Ehdr *, size_t, Elf64_Shdr *);
-Elf64_Sym *GetElfDynSymbolTable(const Elf64_Ehdr *, size_t, Elf64_Xword *);
-char *GetElfDynStringTable(const Elf64_Ehdr *, size_t);
 
 #endif /* COSMO */
 COSMOPOLITAN_C_END_

libc/elf/elf.mk

@@ -27,7 +27,6 @@ LIBC_ELF_A_DIRECTDEPS =				\
 	LIBC_INTRIN				\
 	LIBC_NEXGEN32E				\
 	LIBC_STR				\
-	LIBC_STUBS
 
 LIBC_ELF_A_DEPS :=				\
 	$(call uniq,$(foreach x,$(LIBC_ELF_A_DIRECTDEPS),$($(x))))

libc/elf/getelfdynstringtable.c

@@ -1,36 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/elf/def.h"
-#include "libc/elf/elf.h"
-#include "libc/str/str.h"
-
-char *GetElfDynStringTable(const Elf64_Ehdr *elf, size_t mapsize) {
-  int i;
-  char *name;
-  Elf64_Shdr *shdr;
-  for (i = 0; i < elf->e_shnum; ++i) {
-    if ((shdr = GetElfSectionHeaderAddress(elf, mapsize, i)) &&
-        shdr->sh_type == SHT_STRTAB &&
-        (name = GetElfSectionName(elf, mapsize, shdr)) &&
-        !strcmp(name, ".dynstr")) {
-      return GetElfSectionAddress(elf, mapsize, shdr);
-    }
-  }
-  return 0;
-}

libc/elf/getelfdynsymboltable.c

@@ -1,35 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/elf/def.h"
-#include "libc/elf/elf.h"
-
-Elf64_Sym *GetElfDynSymbolTable(const Elf64_Ehdr *elf, size_t mapsize,
-                                Elf64_Xword *out_count) {
-  int i;
-  Elf64_Shdr *shdr;
-  for (i = elf->e_shnum; i-- > 0;) {
-    if ((shdr = GetElfSectionHeaderAddress(elf, mapsize, i)) &&  //
-        shdr->sh_type == SHT_DYNSYM &&                           //
-        shdr->sh_entsize == sizeof(Elf64_Sym)) {
-      if (out_count) *out_count = shdr->sh_size / sizeof(Elf64_Sym);
-      return GetElfSectionAddress(elf, mapsize, shdr);
-    }
-  }
-  return 0;
-}

libc/elf/getelfprogramheaderaddress.c

@@ -17,16 +17,25 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/elf/elf.h"
-#include "libc/stdckdint.h"
+#include "libc/elf/scalar.h"
+#include "libc/elf/struct/phdr.h"
 
-Elf64_Phdr *GetElfSegmentHeaderAddress(const Elf64_Ehdr *elf,  //
+/**
+ * Returns program header at `elf.phdr[i]`.
+ *
+ * @param elf points to the start of the executable image
+ * @param mapsize is the number of bytes past `elf` we can access
+ * @param i is the program header index, starting at zero
+ * @return program header pointer, or null on error
+ */
+Elf64_Phdr *GetElfProgramHeaderAddress(const Elf64_Ehdr *elf,  //
                                        size_t mapsize,         //
                                        Elf64_Half i) {         //
-  uint64_t last, addr;
+  uint64_t off;
   if (i >= elf->e_phnum) return 0;
-  if (ckd_add(&addr, (uintptr_t)elf, elf->e_phoff)) return 0;
+  if (elf->e_phoff <= 0) return 0;
-  if (ckd_add(&addr, addr, (unsigned)i * elf->e_phentsize)) return 0;
+  if (elf->e_phoff >= mapsize) return 0;
-  if (ckd_add(&last, addr, elf->e_phentsize)) return 0;
+  if (elf->e_phentsize < sizeof(Elf64_Phdr)) return 0;
-  if (last > (uintptr_t)elf + mapsize) return 0;
+  if ((off = elf->e_phoff + (unsigned)i * elf->e_phentsize) > mapsize) return 0;
-  return (Elf64_Phdr *)addr;
+  return (Elf64_Phdr *)((char *)elf + off);
 }

libc/elf/getelfsectionaddress.c

@@ -19,14 +19,23 @@
 #include "libc/elf/elf.h"
 #include "libc/stdckdint.h"
 
-// note: should not be used on bss section
+/**
+ * Returns pointer to elf section file content.
+ *
+ * This function shouldn't be used on the bss section.
+ *
+ * @param elf points to the start of the executable image
+ * @param mapsize is the number of bytes past `elf` we can access
+ * @param shdr is from GetElfSectionHeaderAddress() and null-propagating
+ * @return pointer to content bytes, or null on error
+ */
 void *GetElfSectionAddress(const Elf64_Ehdr *elf,     // validated
                            size_t mapsize,            // validated
                            const Elf64_Shdr *shdr) {  // foreign
-  uint64_t addr, last;
+  uint64_t last;
   if (!shdr) return 0;
-  if (ckd_add(&addr, (uintptr_t)elf, shdr->sh_offset)) return 0;
+  if (shdr->sh_size <= 0) return 0;
-  if (ckd_add(&last, addr, shdr->sh_size)) return 0;
+  if (ckd_add(&last, shdr->sh_offset, shdr->sh_size)) return 0;
-  if (last > (uintptr_t)elf + mapsize) return 0;
+  if (last > mapsize) return 0;
-  return (void *)addr;
+  return (char *)elf + shdr->sh_offset;
 }

libc/elf/getelfsectionheaderaddress.c

@@ -17,16 +17,24 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/elf/elf.h"
-#include "libc/stdckdint.h"
+#include "libc/elf/struct/shdr.h"
 
+/**
+ * Returns section header object at `elf.section[i]`.
+ *
+ * @param elf points to the start of the executable image
+ * @param mapsize is the number of bytes past `elf` we can access
+ * @param i is the section header index, starting at zero
+ * @return section header pointer, or null on error
+ */
 Elf64_Shdr *GetElfSectionHeaderAddress(const Elf64_Ehdr *elf,  //
                                        size_t mapsize,         //
                                        Elf64_Half i) {         //
-  uint64_t addr, last;
+  uint64_t off;
   if (i >= elf->e_shnum) return 0;
-  if (ckd_add(&addr, (uintptr_t)elf, elf->e_shoff)) return 0;
+  if (elf->e_shoff <= 0) return 0;
-  if (ckd_add(&addr, addr, (unsigned)i * elf->e_shentsize)) return 0;
+  if (elf->e_shoff >= mapsize) return 0;
-  if (ckd_add(&last, addr, elf->e_shentsize)) return 0;
+  if (elf->e_shentsize < sizeof(Elf64_Shdr)) return 0;
-  if (last > (uintptr_t)elf + mapsize) return 0;
+  if ((off = elf->e_shoff + (unsigned)i * elf->e_shentsize) > mapsize) return 0;
-  return (Elf64_Shdr *)addr;
+  return (Elf64_Shdr *)((char *)elf + off);
 }

libc/elf/getelfsectionnamestringtable.c

@@ -17,9 +17,16 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/elf/elf.h"
+#include "libc/elf/struct/shdr.h"
 
+/**
+ * Returns section name string table.
+ *
+ * @param elf points to the start of the executable image
+ * @param mapsize is the number of bytes past `elf` we can access
+ * @return double-nul terminated string list, or null on error
+ */
 char *GetElfSectionNameStringTable(const Elf64_Ehdr *elf, size_t mapsize) {
-  if (!elf->e_shoff || !elf->e_shentsize) return 0;
   return GetElfSectionAddress(
       elf, mapsize, GetElfSectionHeaderAddress(elf, mapsize, elf->e_shstrndx));
 }

libc/elf/getelfstring.c

@@ -17,17 +17,28 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/elf/elf.h"
-#include "libc/stdckdint.h"
+#include "libc/elf/scalar.h"
+#include "libc/elf/struct/ehdr.h"
 #include "libc/str/str.h"
 
+/**
+ * Returns `strtab + i` from elf string table.
+ *
+ * @param elf points to the start of the executable image
+ * @param mapsize is the number of bytes past `elf` we can access
+ * @param strtab is double-nul string list from GetElfStringTable()
+ * @param i is byte index into strtab where needed string starts
+ * @return pointer to nul terminated string, or null on error
+ */
 char *GetElfString(const Elf64_Ehdr *elf,  // validated
                    size_t mapsize,         // validated
                    const char *strtab,     // validated
-                   Elf64_Word rva) {       // foreign
+                   Elf64_Word i) {         // foreign
-  uintptr_t addr;
+  const char *e;
-  if (!strtab) return 0;
+  e = (const char *)elf;
-  if (ckd_add(&addr, (uintptr_t)strtab, rva)) return 0;
+  if (strtab < e) return 0;
-  if (addr >= (uintptr_t)elf + mapsize) return 0;
+  if (strtab >= e + mapsize) return 0;
-  if (!memchr((char *)addr, 0, (uintptr_t)elf + mapsize - addr)) return 0;
+  if (strtab + i >= e + mapsize) return 0;
-  return (char *)addr;
+  if (!memchr(strtab + i, 0, (e + mapsize) - (strtab + i))) return 0;
+  return (char *)strtab + i;
 }

libc/elf/getelfstringtable.c

@@ -18,9 +18,21 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/elf/def.h"
 #include "libc/elf/elf.h"
+#include "libc/elf/struct/ehdr.h"
+#include "libc/elf/struct/shdr.h"
 #include "libc/str/str.h"
 
-char *GetElfStringTable(const Elf64_Ehdr *elf, size_t mapsize) {
+/**
+ * Returns pointer to elf string table.
+ *
+ * @param elf points to the start of the executable image
+ * @param mapsize is the number of bytes past `elf` we can access
+ * @param section_name is usually `".strtab"`, `".dynstr"`, or null
+ * @return pointer to double-nul terminated string list or null on error
+ */
+char *GetElfStringTable(const Elf64_Ehdr *elf,  //
+                        size_t mapsize,         //
+                        const char *section_name) {
   int i;
   char *name;
   Elf64_Shdr *shdr;
@@ -28,9 +40,9 @@ char *GetElfStringTable(const Elf64_Ehdr *elf, size_t mapsize) {
     if ((shdr = GetElfSectionHeaderAddress(elf, mapsize, i)) &&
         shdr->sh_type == SHT_STRTAB &&
         (name = GetElfSectionName(elf, mapsize, shdr)) &&
-        !strcmp(name, ".strtab")) {
+        (!section_name || !strcmp(name, section_name))) {
       return GetElfSectionAddress(elf, mapsize, shdr);
     }
   }
-  return NULL;
+  return 0;
 }

libc/elf/getelfstrs.c

@@ -1,37 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/elf/def.h"
-#include "libc/elf/elf.h"
-#include "libc/str/str.h"
-
-char *GetElfStrs(const Elf64_Ehdr *elf, size_t mapsize, size_t *out_size) {
-  int i;
-  char *name;
-  Elf64_Shdr *shdr;
-  for (i = 0; i < elf->e_shnum; ++i) {
-    if ((shdr = GetElfSectionHeaderAddress(elf, mapsize, i)) &&
-        shdr->sh_type == SHT_STRTAB &&
-        (name = GetElfSectionName(elf, mapsize, shdr)) &&
-        !strcmp(name, ".strtab")) {
-      if (out_size) *out_size = shdr->sh_size;
-      return GetElfSectionAddress(elf, mapsize, shdr);
-    }
-  }
-  return 0;
-}

libc/elf/getelfsymboltable.c

@@ -18,20 +18,32 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/elf/def.h"
 #include "libc/elf/elf.h"
+#include "libc/elf/scalar.h"
+#include "libc/elf/struct/ehdr.h"
+#include "libc/elf/struct/sym.h"
 
-Elf64_Sym *GetElfSymbolTable(const Elf64_Ehdr *elf, size_t mapsize,
+/**
+ * Returns pointer to elf symbol table.
+ *
+ * @param elf points to the start of the executable image
+ * @param mapsize is the number of bytes past `elf` we can access
+ * @param section_type is usually `SHT_SYMTAB` or `SHT_DYNSYM`
+ * @param out_count optionally receives number of elements in res
+ * @return pointer to symbol array, or null on error
+ */
+Elf64_Sym *GetElfSymbolTable(const Elf64_Ehdr *elf,  //
+                             size_t mapsize,         //
+                             int section_type,       //
                              Elf64_Xword *out_count) {
   int i;
   Elf64_Shdr *shdr;
-  if (elf->e_shentsize) {
   for (i = elf->e_shnum; i > 0; --i) {
-      shdr = GetElfSectionHeaderAddress(elf, mapsize, i - 1);
+    if ((shdr = GetElfSectionHeaderAddress(elf, mapsize, i - 1)) &&  //
-      if (shdr->sh_type == SHT_SYMTAB) {
+        shdr->sh_entsize == sizeof(Elf64_Sym) &&                     //
-        if (shdr->sh_entsize != sizeof(Elf64_Sym)) __builtin_trap();
+        shdr->sh_type == section_type) {
       if (out_count) *out_count = shdr->sh_size / sizeof(Elf64_Sym);
       return GetElfSectionAddress(elf, mapsize, shdr);
     }
   }
-  }
+  return 0;
-  return NULL;
 }

libc/elf/getelfvirtualaddressrange.c

@@ -1,39 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/elf/elf.h"
-#include "libc/limits.h"
-
-void GetElfVirtualAddressRange(const Elf64_Ehdr *elf, size_t elfsize,
-                               intptr_t *out_start, intptr_t *out_end) {
-  unsigned i;
-  Elf64_Phdr *phdr;
-  intptr_t start, end, pstart, pend;
-  start = INTPTR_MAX;
-  end = 0;
-  for (i = 0; i < elf->e_phnum; ++i) {
-    phdr = GetElfSegmentHeaderAddress(elf, elfsize, i);
-    if (phdr->p_type != PT_LOAD) continue;
-    pstart = phdr->p_vaddr;
-    pend = phdr->p_vaddr + phdr->p_memsz;
-    if (pstart < start) start = pstart;
-    if (pend > end) end = pend;
-  }
-  if (out_start) *out_start = start;
-  if (out_end) *out_end = end;
-}

libc/elf/iself64binary.c

@@ -16,12 +16,20 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/elf/def.h"
 #include "libc/elf/elf.h"
-#include "libc/str/str.h"
+#include "libc/elf/struct/ehdr.h"
+#include "libc/intrin/bits.h"
 
+/**
+ * Returns true if `elf` is a 64-bit elf executable.
+ *
+ * @param elf points to the start of the executable image
+ * @param mapsize is the number of bytes past `elf` we can access
+ * @return true if elf header looks legit
+ */
 bool IsElf64Binary(const Elf64_Ehdr *elf, size_t mapsize) {
   if (mapsize < sizeof(Elf64_Ehdr)) return false;
-  if (memcmp(elf->e_ident, ELFMAG, 4)) return false;
+  if (READ32LE(elf->e_ident) != READ32LE(ELFMAG)) return false;
-  return (elf->e_ident[EI_CLASS] == ELFCLASSNONE ||
+  return elf->e_ident[EI_CLASS] != ELFCLASS32;
-          elf->e_ident[EI_CLASS] == ELFCLASS64);
 }

libc/elf/scalar.h

@@ -1,6 +1,5 @@
 #ifndef COSMOPOLITAN_LIBC_ELF_SCALAR_H_
 #define COSMOPOLITAN_LIBC_ELF_SCALAR_H_
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 
 #define Elf64_Addr    uint64_t
 #define Elf64_Half    uint16_t
@@ -13,5 +12,4 @@
 #define Elf64_Xword   uint64_t
 #define Elf_Symndx    uint32_t
 
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_LIBC_ELF_SCALAR_H_ */

libc/fmt/fmt.h

@@ -22,14 +22,17 @@ int vsprintf(char *, const char *, va_list)
 dontthrow nocallback;
 int sscanf(const char *, const char *, ...) scanfesque(2);
 int vsscanf(const char *, const char *, va_list);
-int vcscanf(int (*)(void *), int (*)(int, void *), void *, const char *,
-            va_list);
-int __fmt(void *, void *, const char *, va_list) _Hide;
 char *itoa(int, char *, int) compatfn;
 char *fcvt(double, int, int *, int *);
 char *ecvt(double, int, int *, int *);
 char *gcvt(double, int, char *);
 
+#ifdef COSMO
+int __vcscanf(int (*)(void *), int (*)(int, void *), void *, const char *,
+              va_list);
+int __fmt(void *, void *, const char *, va_list) _Hide;
+#endif
+
 COSMOPOLITAN_C_END_
 #endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_LIBC_FMT_FMT_H_ */

libc/fmt/fmt.mk

@@ -34,11 +34,10 @@ LIBC_FMT_A_CHECKS =				\
 	$(LIBC_FMT_A_HDRS:%=o/$(MODE)/%.ok)
 
 LIBC_FMT_A_DIRECTDEPS =				\
+	LIBC_INTRIN				\
 	LIBC_NEXGEN32E				\
 	LIBC_NT_KERNEL32			\
 	LIBC_STR				\
-	LIBC_INTRIN				\
-	LIBC_STUBS				\
 	LIBC_SYSV				\
 	LIBC_TINYMATH				\
 	THIRD_PARTY_COMPILER_RT

libc/intrin/__cxa_pure_virtual.c

@@ -17,11 +17,12 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/intrin/kprintf.h"
+#include "libc/runtime/runtime.h"
 
 void __cxa_pure_virtual(void) {
 #ifndef NDEBUG
   kprintf("__cxa_pure_virtual() called\n"
           "Did you call a virtual method from a destructor?\n");
 #endif
-  __builtin_trap();
+  abort();
 }

libc/intrin/abort.c

@@ -1,7 +1,7 @@
-/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8     -*-│
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set et ft=asm ts=8 tw=8 fenc=utf-8                                     :vi│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
 ╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
+│ Copyright 2023 Justine Alexandra Roberts Tunney                              │
 │                                                                              │
 │ Permission to use, copy, modify, and/or distribute this software for         │
 │ any purpose with or without fee is hereby granted, provided that the         │
@@ -16,9 +16,8 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/macros.internal.h"
 
-//	See -mfunction-return=thunk
+// stub version of abort() for low-dependency apps
-__x86_return_thunk:
+__attribute__((__noreturn__, __weak__)) void abort(void) {
-	ret
+  __builtin_trap();
-	.endfn	__x86_return_thunk,weak
+}

libc/intrin/asan.c

@@ -176,7 +176,7 @@ static bool __asan_once(void) {
 #define __asan_unreachable()                                      \
   do {                                                            \
     kprintf("%s:%d: __asan_unreachable()\n", __FILE__, __LINE__); \
-    for (;;) __builtin_trap();                                    \
+    __builtin_trap();                                             \
   } while (0)
 
 static int __asan_bsf(uint64_t x) {

libc/intrin/ashlti3.c

@@ -15,8 +15,6 @@
 
 #include "third_party/compiler_rt/int_lib.h"
 
-#ifdef CRT_HAS_128BIT
-
 /* Returns: a << b */
 
 /* Precondition:  0 <= b < bits_in_tword */
@@ -42,5 +40,3 @@ __ashlti3(ti_int a, si_int b)
     }
     return result.all;
 }
-
-#endif /* CRT_HAS_128BIT */

libc/intrin/assertfail.greg.c

@@ -20,6 +20,7 @@
 #include "libc/atomic.h"
 #include "libc/intrin/atomic.h"
 #include "libc/intrin/kprintf.h"
+#include "libc/runtime/runtime.h"
 
 privileged void __assert_fail(const char *expr, const char *file, int line) {
   static atomic_bool once;

libc/intrin/divmodti4.c

@@ -29,13 +29,13 @@ COMPILER_RT_ABI ti_int __divmodti4(ti_int a, ti_int b, tu_int *opt_out_rem) {
   }
   sa = a >> k;                 // sa = a < 0 ? -1 : 0
   sb = b >> k;                 // sb = b < 0 ? -1 : 0
-  x = (a ^ sa) - sa;           // negate if sa == -1
+  x = (tu_int)(a ^ sa) - sa;   // negate if sa == -1
-  y = (b ^ sb) - sb;           // negate if sb == -1
+  y = (tu_int)(b ^ sb) - sb;   // negate if sb == -1
   sq = sa ^ sb;                // sign of quotient
   sr = sa;                     // sign of remainder
   q = __udivmodti4(x, y, &r);  // unsigned divide
-  q = (q ^ sq) - sq;           // fix quotient sign
+  q = (tu_int)(q ^ sq) - sq;   // fix quotient sign
-  r = (r ^ sr) - sr;           // fix remainder sign
+  r = (tu_int)(r ^ sr) - sr;   // fix remainder sign
   if (opt_out_rem) *opt_out_rem = r;
   return q;
 }

libc/intrin/intrin.mk

@@ -28,12 +28,11 @@ LIBC_INTRIN_A_CHECKS =					\
 	$(LIBC_INTRIN_A_HDRS:%=o/$(MODE)/%.ok)
 
 LIBC_INTRIN_A_DIRECTDEPS =				\
-	LIBC_STUBS					\
-	LIBC_SYSV					\
-	LIBC_SYSV_CALLS					\
 	LIBC_NEXGEN32E					\
 	LIBC_NT_KERNEL32				\
-	LIBC_NT_WS2_32
+	LIBC_NT_WS2_32					\
+	LIBC_SYSV					\
+	LIBC_SYSV_CALLS
 
 LIBC_INTRIN_A_DEPS :=					\
 	$(call uniq,$(foreach x,$(LIBC_INTRIN_A_DIRECTDEPS),$($(x))))
@@ -218,8 +217,12 @@ o/$(MODE)/libc/intrin/aarch64/%.o: libc/intrin/aarch64/%.S
 	@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
 o/$(MODE)/libc/intrin/fenv.o: libc/intrin/fenv.S
 	@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
+o/$(MODE)/libc/intrin/gcov.o: libc/intrin/gcov.S
+	@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
 o/$(MODE)/libc/intrin/futex.o: libc/intrin/futex.S
 	@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
+o/$(MODE)/libc/intrin/typeinfo.o: libc/intrin/typeinfo.S
+	@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
 o/$(MODE)/libc/intrin/kclocknames.o: libc/intrin/kclocknames.S
 	@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
 o/$(MODE)/libc/intrin/kdos2errno.o: libc/intrin/kdos2errno.S

libc/intrin/mulodi4.c

@@ -26,7 +26,7 @@ __mulodi4(di_int a, di_int b, int* overflow)
     const di_int MIN = (du_int)1 << (N-1);
     const di_int MAX = ~MIN;
     *overflow = 0; 
-    di_int result = (du_int)a * (du_int)b;
+    di_int result = (du_int)a * b;
     if (a == MIN)
     {
         if (b != 0 && b != 1)

libc/intrin/mulosi4.c

@@ -26,7 +26,7 @@ __mulosi4(si_int a, si_int b, int* overflow)
     const si_int MIN = (su_int)1 << (N-1);
     const si_int MAX = ~MIN;
     *overflow = 0; 
-    si_int result = (su_int)a * (su_int)b;
+    si_int result = (su_int)a * b;
     if (a == MIN)
     {
         if (b != 0 && b != 1)

libc/intrin/muloti4.c

@@ -28,7 +28,7 @@ __muloti4(ti_int a, ti_int b, int* overflow)
     const ti_int MIN = (tu_int)1 << (N-1);
     const ti_int MAX = ~MIN;
     *overflow = 0;
-    ti_int result = (tu_int)a * (tu_int)b;
+    ti_int result = (tu_int)a * b;
     if (a == MIN)
     {
         if (b != 0 && b != 1)

libc/intrin/onarithmeticoverflow.c

@@ -17,6 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/intrin/kprintf.h"
+#include "libc/runtime/runtime.h"
 
 /**
  * Arithmetic overflow handler.
@@ -31,5 +32,5 @@
  */
 __attribute__((__weak__)) void __on_arithmetic_overflow(void) {
   kprintf("error: -ftrapv caught arithmetic overflow\n");
-  __builtin_trap();
+  abort();
 }

libc/intrin/stackchkfail.c

@@ -17,8 +17,9 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/intrin/kprintf.h"
+#include "libc/runtime/runtime.h"
 
-void __stack_chk_fail(void) {
+__attribute__((__weak__)) void __stack_chk_fail(void) {
-  kprintf("stack smashed\n");
+  kprintf("%s: stack smashed\n", program_invocation_name);
   __builtin_trap();
 }

libc/intrin/stackchkfaillocal.c

@@ -18,6 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/runtime/internal.h"
 
-void __stack_chk_fail_local(void) {
+__attribute__((__weak__)) void __stack_chk_fail_local(void) {
   __stack_chk_fail();
 }

libc/intrin/ubsan.c

@@ -199,7 +199,7 @@ static uintptr_t __ubsan_extend(struct UbsanTypeDescriptor *t, uintptr_t x) {
 }
 
 static wontreturn void __ubsan_unreachable(void) {
-  for (;;) __builtin_trap();
+  for (;;) abort();
 }
 
 static void __ubsan_exit(void) {

libc/isystem/assert.h

@@ -1,4 +1,4 @@
-#ifndef LIBC_ISYSTEM_ASSERT_H_
+#ifndef _ASSERT_H
-#define LIBC_ISYSTEM_ASSERT_H_
+#define _ASSERT_H
 #include "libc/assert.h"
-#endif
+#endif /* _ASSERT_H */

libc/isystem/byteswap.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_BYTESWAP_H_
+#ifndef _BYTESWAP_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_BYTESWAP_H_
+#define _BYTESWAP_H
 #include "libc/intrin/bswap.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_BYTESWAP_H_ */
+#endif /* _BYTESWAP_H */

libc/isystem/complex.h

@@ -1,6 +1,6 @@
-#ifndef LIBC_ISYSTEM_COMPLEX_H_
+#ifndef _COMPLEX_H
-#define LIBC_ISYSTEM_COMPLEX_H_
+#define _COMPLEX_H
 #include "libc/complex.h"
 #include "libc/imag.internal.h"
 #include "libc/math.h"
-#endif
+#endif /* _COMPLEX_H */

libc/isystem/cosmo.h

@@ -30,6 +30,7 @@
 #include "libc/calls/struct/timespec.h"
 #include "libc/calls/struct/timeval.h"
 #include "libc/dce.h"
+#include "libc/elf/elf.h"
 #include "libc/fmt/itoa.h"
 #include "libc/fmt/leb128.h"
 #include "libc/intrin/bsf.h"

libc/isystem/cpio.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_CPIO_H_
+#ifndef _CPIO_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_CPIO_H_
+#define _CPIO_H
 #include "libc/sysv/consts/c.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_CPIO_H_ */
+#endif /* _CPIO_H */

libc/isystem/cpuid.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_CPUID_INTERNAL_H_
+#ifndef _CPUID_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_CPUID_INTERNAL_H_
+#define _CPUID_H
 #include "third_party/intel/cpuid.internal.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_CPUID_INTERNAL_H_ */
+#endif /* _CPUID_H */

libc/isystem/crypt.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_CRYPT_H_
+#ifndef _CRYPT_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_CRYPT_H_
+#define _CRYPT_H
 #include "third_party/musl/crypt.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_CRYPT_H_ */
+#endif /* _CRYPT_H */

libc/isystem/ctype.h

@@ -1,4 +1,4 @@
-#ifndef LIBC_ISYSTEM_CTYPE_H_
+#ifndef _CTYPE_H
-#define LIBC_ISYSTEM_CTYPE_H_
+#define _CTYPE_H
 #include "libc/str/str.h"
-#endif
+#endif /* _CTYPE_H */

libc/isystem/dirent.h

@@ -1,7 +1,7 @@
-#ifndef LIBC_ISYSTEM_DIRENT_H_
+#ifndef _DIRENT_H
-#define LIBC_ISYSTEM_DIRENT_H_
+#define _DIRENT_H
 #include "libc/calls/calls.h"
 #include "libc/calls/struct/dirent.h"
 #include "libc/calls/weirdtypes.h"
 #include "libc/sysv/consts/dt.h"
-#endif
+#endif /* _DIRENT_H */

libc/isystem/dlfcn.h

@@ -1,4 +1,4 @@
-#ifndef LIBC_ISYSTEM_SYS_DLFCN_H_
+#ifndef _DLFCN_H
-#define LIBC_ISYSTEM_SYS_DLFCN_H_
+#define _DLFCN_H
 #include "libc/runtime/dlfcn.h"
-#endif
+#endif /* _DLFCN_H */

libc/isystem/dog.py

@@ -1,4 +0,0 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_DOG_PY_
-#define COSMOPOLITAN_LIBC_ISYSTEM_DOG_PY_
-#include "third_party/intel/dog.py"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_DOG_PY_ */

libc/isystem/elf.h

@@ -1,4 +1,22 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_ELF_H_
+#ifndef _ELF_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_ELF_H_
+#define _ELF_H
-#include "libc/elf/elf.h"
+#include "libc/elf/def.h"
-#endif
+#include "libc/elf/scalar.h"
+#include "libc/elf/struct/auxv.h"
+#include "libc/elf/struct/chdr.h"
+#include "libc/elf/struct/dyn.h"
+#include "libc/elf/struct/ehdr.h"
+#include "libc/elf/struct/lib.h"
+#include "libc/elf/struct/move.h"
+#include "libc/elf/struct/nhdr.h"
+#include "libc/elf/struct/phdr.h"
+#include "libc/elf/struct/rel.h"
+#include "libc/elf/struct/rela.h"
+#include "libc/elf/struct/shdr.h"
+#include "libc/elf/struct/sym.h"
+#include "libc/elf/struct/syminfo.h"
+#include "libc/elf/struct/verdaux.h"
+#include "libc/elf/struct/verdef.h"
+#include "libc/elf/struct/vernaux.h"
+#include "libc/elf/struct/verneed.h"
+#endif /* _ELF_H */

libc/isystem/endian.h

@@ -1,5 +1,5 @@
-#ifndef LIBC_ISYSTEM_ENDIAN_H_
+#ifndef _ENDIAN_H
-#define LIBC_ISYSTEM_ENDIAN_H_
+#define _ENDIAN_H
 #include "libc/intrin/newbie.h"
 #include "libc/sysv/consts/endian.h"
-#endif /* LIBC_ISYSTEM_ENDIAN_H_ */
+#endif /* _ENDIAN_H */

libc/isystem/err.h

@@ -1,4 +1,4 @@
-#ifndef LIBC_ISYSTEM_ERR_H_
+#ifndef _ERR_H
-#define LIBC_ISYSTEM_ERR_H_
+#define _ERR_H
 #include "libc/log/bsd.h"
-#endif
+#endif /* _ERR_H */

libc/isystem/errno.h

@@ -1,4 +1,4 @@
-#ifndef LIBC_ISYSTEM_ERRNO_H_
+#ifndef _ERRNO_H
-#define LIBC_ISYSTEM_ERRNO_H_
+#define _ERRNO_H
 #include "libc/errno.h"
-#endif
+#endif /* _ERRNO_H */

libc/isystem/fcntl.h

@@ -1,5 +1,5 @@
-#ifndef LIBC_ISYSTEM_SYS_FCNTL_H_
+#ifndef _FCNTL_H
-#define LIBC_ISYSTEM_SYS_FCNTL_H_
+#define _FCNTL_H
 #include "libc/calls/calls.h"
 #include "libc/calls/struct/flock.h"
 #include "libc/calls/weirdtypes.h"
@@ -10,4 +10,4 @@
 #include "libc/sysv/consts/posix.h"
 #include "libc/sysv/consts/s.h"
 #include "libc/sysv/consts/splice.h"
-#endif
+#endif /* _FCNTL_H */

libc/isystem/features.h

@@ -1,5 +1,5 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_FEATURES_H_
+#ifndef _FEATURES_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_FEATURES_H_
+#define _FEATURES_H
 
 #if defined(_ALL_SOURCE) && !defined(_GNU_SOURCE)
 #define _GNU_SOURCE 1
@@ -35,4 +35,4 @@
 #define _Noreturn
 #endif
 
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_FEATURES_H_ */
+#endif /* _FEATURES_H */

libc/isystem/fenv.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_FENV_H_
+#ifndef _FENV_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_FENV_H_
+#define _FENV_H
 #include "libc/runtime/fenv.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_FENV_H_ */
+#endif /* _FENV_H */

libc/isystem/float.h

@@ -1,5 +1,5 @@
-#ifndef LIBC_ISYSTEM_FLOAT_H_
+#ifndef _FLOAT_H
-#define LIBC_ISYSTEM_FLOAT_H_
+#define _FLOAT_H
 #include "libc/math.h"
 #include "libc/runtime/fenv.h"
-#endif
+#endif /* _FLOAT_H */

libc/isystem/fnmatch.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_FNMATCH_H_
+#ifndef _FNMATCH_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_FNMATCH_H_
+#define _FNMATCH_H
 #include "third_party/musl/fnmatch.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_FNMATCH_H_ */
+#endif /* _FNMATCH_H */

libc/isystem/ftw.h

@@ -1,6 +1,6 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_FTW_H_
+#ifndef _FTW_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_FTW_H_
+#define _FTW_H
 #include "libc/calls/weirdtypes.h"
 #include "libc/sysv/consts/s.h"
 #include "third_party/musl/ftw.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_FTW_H_ */
+#endif /* _FTW_H */

libc/isystem/fun.py

@@ -1,4 +0,0 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_FUN_PY_
-#define COSMOPOLITAN_LIBC_ISYSTEM_FUN_PY_
-#include "third_party/intel/fun.py"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_FUN_PY_ */

libc/isystem/getopt.h

@@ -1,4 +1,4 @@
-#ifndef LIBC_ISYSTEM_GETOPT_H_
+#ifndef _GETOPT_H
-#define LIBC_ISYSTEM_GETOPT_H_
+#define _GETOPT_H
 #include "third_party/getopt/getopt.h"
-#endif
+#endif /* _GETOPT_H */

libc/isystem/glob.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_GLOB_H_
+#ifndef _GLOB_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_GLOB_H_
+#define _GLOB_H
 #include "third_party/musl/glob.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_GLOB_H_ */
+#endif /* _GLOB_H */

libc/isystem/grp.h

@@ -1,5 +1,5 @@
-#ifndef LIBC_ISYSTEM_GRP_H_
+#ifndef _GRP_H
-#define LIBC_ISYSTEM_GRP_H_
+#define _GRP_H
 #include "libc/calls/calls.h"
 #include "third_party/musl/passwd.h"
-#endif
+#endif /* _GRP_H */

libc/isystem/iconv.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_ICONV_H_
+#ifndef _ICONV_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_ICONV_H_
+#define _ICONV_H
 #include "libc/stdio/iconv.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_ICONV_H_ */
+#endif /* _ICONV_H */

libc/isystem/inttypes.h

@@ -1,7 +1,7 @@
-#ifndef LIBC_ISYSTEM_INTTYPES_H_
+#ifndef _INTTYPES_H
-#define LIBC_ISYSTEM_INTTYPES_H_
+#define _INTTYPES_H
 #include "libc/fmt/conv.h"
 #include "libc/inttypes.h"
 #include "libc/limits.h"
 #include "libc/literal.h"
-#endif /* LIBC_ISYSTEM_INTTYPES_H_ */
+#endif /* _INTTYPES_H */

libc/isystem/iso646.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_ISO646_H_
+#ifndef _ISO646_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_ISO646_H_
+#define _ISO646_H
 #include "libc/iso646.internal.h"
-#endif
+#endif /* _ISO646_H */

libc/isystem/langinfo.h

@@ -1,6 +1,6 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_LANGINFO_H_
+#ifndef _LANGINFO_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_LANGINFO_H_
+#define _LANGINFO_H
 #include "libc/str/langinfo.h"
 #include "libc/str/locale.h"
 #include "libc/str/nltypes.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_LANGINFO_H_ */
+#endif /* _LANGINFO_H */

libc/isystem/libgen.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_LIBGEN_H_
+#ifndef _LIBGEN_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_LIBGEN_H_
+#define _LIBGEN_H
 #include "libc/fmt/conv.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_LIBGEN_H_ */
+#endif /* _LIBGEN_H */

libc/isystem/limits.h

@@ -1,9 +1,9 @@
-#ifndef LIBC_ISYSTEM_LIMITS_H_
+#ifndef _LIMITS_H
-#define LIBC_ISYSTEM_LIMITS_H_
+#define _LIMITS_H
 #include "libc/limits.h"
 #include "libc/sysv/consts/_posix.h"
 #include "libc/sysv/consts/iov.h"
 #include "libc/sysv/consts/limits.h"
 #include "libc/sysv/consts/xopen.h"
 #include "libc/thread/thread.h"
-#endif
+#endif /* _LIMITS_H */

libc/isystem/locale.h

@@ -1,5 +1,5 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_LOCALE_H_
+#ifndef _LOCALE_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_LOCALE_H_
+#define _LOCALE_H
 #include "libc/str/locale.h"
 #include "libc/str/unicode.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_LOCALE_H_ */
+#endif /* _LOCALE_H */

libc/isystem/malloc.h

@@ -1,4 +1,4 @@
-#ifndef LIBC_ISYSTEM_MALLOC_H_
+#ifndef _MALLOC_H
-#define LIBC_ISYSTEM_MALLOC_H_
+#define _MALLOC_H
 #include "libc/mem/mem.h"
-#endif
+#endif /* _MALLOC_H */

libc/isystem/math.h

@@ -1,4 +1,4 @@
-#ifndef LIBC_ISYSTEM_MATH_H_
+#ifndef _MATH_H
-#define LIBC_ISYSTEM_MATH_H_
+#define _MATH_H
 #include "libc/math.h"
-#endif
+#endif /* _MATH_H */

libc/isystem/memory.h

@@ -1,5 +1,5 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_MEMORY_H_
+#ifndef _MEMORY_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_MEMORY_H_
+#define _MEMORY_H
 #include "libc/mem/alg.h"
 #include "libc/str/str.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_MEMORY_H_ */
+#endif /* _MEMORY_H */

libc/isystem/netdb.h

@@ -1,5 +1,5 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_NETDB_H_
+#ifndef _NETDB_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_NETDB_H_
+#define _NETDB_H
 #include "libc/dns/dns.h"
 #include "libc/dns/ent.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_NETDB_H_ */
+#endif /* _NETDB_H */

libc/isystem/setjmp.h

@@ -1,4 +1,4 @@
-#ifndef LIBC_ISYSTEM_SETJMP_H_
+#ifndef _SETJMP_H
-#define LIBC_ISYSTEM_SETJMP_H_
+#define _SETJMP_H
 #include "libc/runtime/runtime.h"
-#endif
+#endif /* _SETJMP_H */

libc/isystem/signal.h

@@ -1,5 +1,5 @@
-#ifndef LIBC_ISYSTEM_SIGNAL_H_
+#ifndef _SIGNAL_H
-#define LIBC_ISYSTEM_SIGNAL_H_
+#define _SIGNAL_H
 #include "libc/calls/calls.h"
 #include "libc/calls/sigtimedwait.h"
 #include "libc/calls/struct/sigaction.h"
@@ -7,4 +7,4 @@
 #include "libc/sysv/consts/sa.h"
 #include "libc/sysv/consts/sicode.h"
 #include "libc/sysv/consts/ss.h"
-#endif
+#endif /* _SIGNAL_H */

libc/isystem/stdalign.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_STDALIGN_H_
+#ifndef _STDALIGN_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_STDALIGN_H_
+#define _STDALIGN_H
 #include "libc/stdalign.internal.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_STDALIGN_H_ */
+#endif /* _STDALIGN_H */

libc/isystem/stdarg.h

@@ -1,3 +1,3 @@
-#ifndef LIBC_ISYSTEM_STDARG_H_
+#ifndef _STDARG_H
-#define LIBC_ISYSTEM_STDARG_H_
+#define _STDARG_H
-#endif
+#endif /* _STDARG_H */

libc/isystem/stdatomic.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_STDATOMIC_H_
+#ifndef _STDATOMIC_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_STDATOMIC_H_
+#define _STDATOMIC_H
 #include "libc/intrin/atomic.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_STDATOMIC_H_ */
+#endif /* _STDATOMIC_H */

libc/isystem/stdbool.h

@@ -1,3 +1,3 @@
-#ifndef LIBC_ISYSTEM_STDBOOL_H_
+#ifndef _STDBOOL_H
-#define LIBC_ISYSTEM_STDBOOL_H_
+#define _STDBOOL_H
-#endif
+#endif /* _STDBOOL_H */

libc/isystem/stdckdint.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_STDCKDINT_H_
+#ifndef _STDCKDINT_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_STDCKDINT_H_
+#define _STDCKDINT_H
 #include "libc/stdckdint.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_STDCKDINT_H_ */
+#endif /* _STDCKDINT_H */

libc/isystem/stddef.h

@@ -1,3 +1,3 @@
-#ifndef LIBC_ISYSTEM_STDDEF_H_
+#ifndef _STDDEF_H
-#define LIBC_ISYSTEM_STDDEF_H_
+#define _STDDEF_H
-#endif
+#endif /* _STDDEF_H */

libc/isystem/stdint.h

@@ -1,6 +1,6 @@
-#ifndef LIBC_ISYSTEM_STDINT_H_
+#ifndef _STDINT_H
-#define LIBC_ISYSTEM_STDINT_H_
+#define _STDINT_H
 #include "libc/inttypes.h"
 #include "libc/limits.h"
 #include "libc/literal.h"
-#endif
+#endif /* _STDINT_H */

libc/isystem/stdio.h

@@ -1,11 +1,10 @@
-#ifndef LIBC_ISYSTEM_STDIO_H_
+#ifndef _STDIO_H
-#define LIBC_ISYSTEM_STDIO_H_
+#define _STDIO_H
 #include "libc/calls/calls.h"
-#include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
 #include "libc/fmt/fmt.h"
-#include "libc/mem/fmt.h"
+#include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/stdio/temp.h"
 #include "third_party/musl/tempnam.h"
-#endif
+#endif /* _STDIO_H */

libc/isystem/stdio_ext.h

@@ -1,4 +1,4 @@
-#ifndef COSMOPOLITAN_LIBC_ISYSTEM_STDIO_EXT_H_
+#ifndef _STDIO_EXT_H
-#define COSMOPOLITAN_LIBC_ISYSTEM_STDIO_EXT_H_
+#define _STDIO_EXT_H
 #include "libc/stdio/stdio_ext.h"
-#endif /* COSMOPOLITAN_LIBC_ISYSTEM_STDIO_EXT_H_ */
+#endif /* _STDIO_EXT_H */

libc/isystem/stdlib.h

@@ -1,5 +1,5 @@
-#ifndef LIBC_ISYSTEM_STDLIB_H_
+#ifndef _STDLIB_H
-#define LIBC_ISYSTEM_STDLIB_H_
+#define _STDLIB_H
 #include "libc/calls/calls.h"
 #include "libc/calls/termios.h"
 #include "libc/fmt/conv.h"
@@ -15,4 +15,4 @@
 #include "third_party/getopt/getopt.h"
 #include "third_party/musl/crypt.h"
 #include "third_party/musl/rand48.h"
-#endif
+#endif /* _STDLIB_H */