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Make more functions friendly to Address Sanitizer

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This commit is contained in:
Justine Tunney 2021-02-02 03:45:31 -08:00
parent 3ab76b2312
commit cbfd4ccd1e
70 changed files with 1267 additions and 291 deletions
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2
libc/nexgen32e/khalfcache3.S
View file

@ -18,8 +18,8 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.h"
/ Half size of level 3 cache in bytes.
.initbss 202,_init_kHalfCache3
/ Half size of level 3 cache in bytes.
kHalfCache3:
.quad 0
.endobj kHalfCache3,globl

2
libc/nexgen32e/nexgen32e.h
View file

@ -3,6 +3,8 @@
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
extern long kHalfCache3;
void imapxlatab(void *);
void insertionsort(int32_t *, size_t);

2
libc/nexgen32e/nexgen32e.mk
View file

@ -8,6 +8,7 @@ LIBC_NEXGEN32E = $(LIBC_NEXGEN32E_A_DEPS) $(LIBC_NEXGEN32E_A)
LIBC_NEXGEN32E_A = o/$(MODE)/libc/nexgen32e/nexgen32e.a
LIBC_NEXGEN32E_A_FILES := $(wildcard libc/nexgen32e/*)
LIBC_NEXGEN32E_A_HDRS = $(filter %.h,$(LIBC_NEXGEN32E_A_FILES))
LIBC_NEXGEN32E_A_INCS = $(filter %.inc,$(LIBC_NEXGEN32E_A_FILES))
LIBC_NEXGEN32E_A_SRCS_A = $(filter %.s,$(LIBC_NEXGEN32E_A_FILES))
LIBC_NEXGEN32E_A_SRCS_S = $(filter %.S,$(LIBC_NEXGEN32E_A_FILES))
LIBC_NEXGEN32E_A_SRCS_C = $(filter %.c,$(LIBC_NEXGEN32E_A_FILES))
@ -49,6 +50,7 @@ o/$(MODE)/libc/nexgen32e/tinystrncmp.ncabi.o: \
LIBC_NEXGEN32E_LIBS = $(foreach x,$(LIBC_NEXGEN32E_ARTIFACTS),$($(x)))
LIBC_NEXGEN32E_SRCS = $(foreach x,$(LIBC_NEXGEN32E_ARTIFACTS),$($(x)_SRCS))
LIBC_NEXGEN32E_HDRS = $(foreach x,$(LIBC_NEXGEN32E_ARTIFACTS),$($(x)_HDRS))
LIBC_NEXGEN32E_INCS = $(foreach x,$(LIBC_NEXGEN32E_ARTIFACTS),$($(x)_INCS))
LIBC_NEXGEN32E_CHECKS = $(foreach x,$(LIBC_NEXGEN32E_ARTIFACTS),$($(x)_CHECKS))
LIBC_NEXGEN32E_OBJS = $(foreach x,$(LIBC_NEXGEN32E_ARTIFACTS),$($(x)_OBJS))
$(LIBC_NEXGEN32E_OBJS): $(BUILD_FILES) libc/nexgen32e/nexgen32e.mk

80
libc/nexgen32e/strsak.S
View file

@ -21,71 +21,6 @@
#include "libc/macros.h"
.source __FILE__
/ Returns pointer to first instance of character.
/
/ @param rdi is a non-null NUL-terminated string pointer
/ @param esi is the search byte
/ @return rax points to character, or to NUL byte if not found
/ @note this won't return NULL if search character is NUL
strchrnul:
.leafprologue
.profilable
or $-1,%r9
jmp 0f
.endfn strchrnul,globl
/ Returns pointer to first instance of character, the BSD way.
/
/ @param rdi is a non-null NUL-terminated string pointer
/ @param esi is the search byte
/ @return rax points to first result, or NULL if not found
/ @note this won't return NULL if search character is NUL
index: nop
/ 𝑠𝑙𝑖𝑑𝑒
.endfn index,globl
/ Returns pointer to first instance of character.
/
/ @param rdi is a non-null NUL-terminated string pointer
/ @param esi is the search byte
/ @return rax points to first result, or NULL if not found
/ @note this won't return NULL if search character is NUL
/ @asyncsignalsafe
strchr: .leafprologue
.profilable
xor %r9d,%r9d
0: movzbl %sil,%edx
or $-1,%rsi
xor %r8,%r8
jmp strsak
.endfn strchr,globl
/ Returns pointer to first instance of character in range.
/
/ @param rdi is a non-null pointer to memory
/ @param esi is the search byte
/ @return rax points to byte if found, or else undefined behavior
rawmemchr:
or $-1,%rdx
/ 𝑠𝑙𝑖𝑑𝑒
.endfn rawmemchr,globl
/ Returns pointer to first instance of character in range.
/
/ @param rdi is a non-null pointer to memory
/ @param esi is the search byte
/ @param rdx is length of memory in bytes
/ @return rax points to byte if found or NULL
/ @asyncsignalsafe
memchr: .leafprologue
.profilable
xchg %rsi,%rdx
mov %dl,%dh
xor %r8,%r8
xor %r10,%r10
jmp strsak
.endfn memchr,globl
/ Returns length of NUL-terminated string w/ security blankets.
/
/ This is like strnlen() except it'll return 0 if (1) RDI is NULL
@ -102,24 +37,13 @@ strnlen_s:
test %rdi,%rdi
jnz 0f
.leafepilogue
.endfn strnlen_s,globl
/ Returns length of NUL-terminated memory, with limit.
/
/ @param rdi is non-null memory
/ @param rsi is the maximum number of bytes to consider
/ @return rax is the number of bytes, excluding the NUL
/ @asyncsignalsafe
strnlen:.leafprologue
.profilable
or $-1,%r10
0: xor %edx,%edx
mov %rdi,%r8
/ 𝑠𝑙𝑖𝑑𝑒
.endfn strnlen,globl
.endfn strnlen_s,globl
/ Swiss army knife of string character scanning.
/ Fourteen fast functions in one.
/ Used to be fourteen fast functions in one.
/
/ @param rdi is non-null string memory
/ @param rsi is max number of bytes to consider