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Add __memset_chk assembler for mips32 and mips64.

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Change-Id: I365b1f345c695850c30ccb1a9f56f254ce182000
This commit is contained in:
Douglas Leung 2016-03-03 18:55:39 -08:00
parent 728e0e9b97
commit 29d4b71426
2 changed files with 15 additions and 18 deletions
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24
libc/arch-mips/string/memset.S
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@ -170,11 +170,6 @@
# define R6_CODE
#endif
/* Allow the routine to be named something else if desired. */
#ifndef MEMSET_NAME
# define MEMSET_NAME memset
#endif
/* We load/store 64 bits at a time when USE_DOUBLE is true.
The C_ prefix stands for CHUNK and is used to avoid macro name
conflicts with system header files. */
@ -209,9 +204,19 @@
#define UNITM1(unit) (((unit)*NSIZE)-1)
#ifdef __ANDROID__
LEAF(MEMSET_NAME,0)
LEAF(__memset_chk,0)
#else
LEAF(MEMSET_NAME)
LEAF(__memset_chk)
#endif
bgtu a2, a3, __memset_chk_fail
// Fall through to memset...
END(__memset_chk)
#ifdef __ANDROID__
LEAF(memset,0)
#else
LEAF(memset)
#endif
.set nomips16
@ -428,9 +433,10 @@ L(leave):
.set at
.set reorder
END(MEMSET_NAME)
END(memset)
#ifndef __ANDROID__
# ifdef _LIBC
libc_hidden_builtin_def (MEMSET_NAME)
libc_hidden_builtin_def (memset)
libc_hidden_builtin_def (__memset_chk)
# endif
#endif

9
libc/bionic/fortify.cpp
View file

@ -153,15 +153,6 @@ void* __memrchr_chk(const void* s, int c, size_t n, size_t actual_size) {
return memrchr(s, c, n);
}
#if defined(__mips__) // TODO: add optimized assembler for mips too, and remove this.
// Runtime implementation of __builtin___memset_chk (used directly by compiler, not in headers).
extern "C" void* __memset_chk(void* dst, int byte, size_t count, size_t dst_len) {
__check_count("memset", "count", count);
__check_buffer_access("memset", "write into", count, dst_len);
return memset(dst, byte, count);
}
#endif
// memset is performance-critical enough that we have assembler __memset_chk implementations.
// This function is used to give better diagnostics than we can easily do from assembler.
extern "C" void* __memset_chk_fail(void* /*dst*/, int /*byte*/, size_t count, size_t dst_len) {