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Justine Tunney 2020-06-15 07:18:57 -07:00
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libc/mem/posix_memalign.S Normal file
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/*-*- mode:asm; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program 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 │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.h"
.yoink __FILE__
/ Allocates aligned memory the POSIX way.
/
/ Allocates a chunk of n bytes, aligned in accord with the alignment
/ argument. Differs from memalign only in that it (1) assigns the
/ allocated memory to *pp rather than returning it, (2) fails and
/ returns EINVAL if the alignment is not a power of two (3) fails and
/ returns ENOMEM if memory cannot be allocated.
/
/ @param rdi is void **pp
/ @param rsi is size_t align
/ @param rdx is size_t size
/ @return eax
posix_memalign:
jmp *hook$posix_memalign(%rip)
.endfn posix_memalign,globl
.initbss 800,_init_posix_memalign
hook$posix_memalign:
.quad 0
.endobj hook$posix_memalign,globl,hidden
.previous
.init.start 800,_init_posix_memalign
.hidden dlposix_memalign
ezlea dlposix_memalign,ax
stosq
.init.end 800,_init_posix_memalign
yoink free