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author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-10-09 20:01:19 +0200 |
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committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-10-09 20:01:19 +0200 |
commit | 3896c5809b49e72fbadc57da2189ff42aa2a5d02 (patch) | |
tree | 976132226affe5ff11686d86d01d059aa5eabc6c /sysdeps/i386/memset.S | |
parent | 52c6cb0bba348bf5f25ff2a213e04c0f3fc378aa (diff) | |
parent | 4dc1e6e42f1f602e1d2227e112f2db8dce9da763 (diff) |
Merge commit 'refs/top-bases/t/hurdsig-boot-fix' into t/hurdsig-boot-fix
Diffstat (limited to 'sysdeps/i386/memset.S')
-rw-r--r-- | sysdeps/i386/memset.S | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/sysdeps/i386/memset.S b/sysdeps/i386/memset.S new file mode 100644 index 0000000000..07b0911988 --- /dev/null +++ b/sysdeps/i386/memset.S @@ -0,0 +1,68 @@ +/* memset with REP MOVSB/STOSB + Copyright (C) 2015-2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#define CFI_PUSH(REG) \ + cfi_adjust_cfa_offset (4); \ + cfi_rel_offset (REG, 0) + +#define CFI_POP(REG) \ + cfi_adjust_cfa_offset (-4); \ + cfi_restore (REG) + +#define PUSH(REG) pushl REG; CFI_PUSH (REG) +#define POP(REG) popl REG; CFI_POP (REG) + +#define STR1 8 +#ifdef USE_AS_BZERO +#define N STR1+4 +#else +#define STR2 STR1+4 +#define N STR2+4 +#endif + + .text +#if defined SHARED && IS_IN (libc) && !defined USE_AS_BZERO +ENTRY (__memset_chk) + movl 12(%esp), %eax + cmpl %eax, 16(%esp) + jb HIDDEN_JUMPTARGET (__chk_fail) +END (__memset_chk) +#endif +ENTRY (memset) + PUSH (%edi) + movl N(%esp), %ecx + movl STR1(%esp), %edi +#ifdef USE_AS_BZERO + xor %eax, %eax +#else + movzbl STR2(%esp), %eax + mov %edi, %edx +#endif + rep stosb +#ifndef USE_AS_BZERO + mov %edx, %eax +#endif + POP (%edi) + ret +END (memset) + +#ifndef USE_AS_BZERO +libc_hidden_builtin_def (memset) +#endif |