2020-06-16 13:38:43 +00:00
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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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2020-06-15 14:18:57 +00:00
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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#include "libc/notice.inc"
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2020-06-16 02:01:28 +00:00
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.source __FILE__
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2020-06-15 14:18:57 +00:00
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/ Resizes the space allocated for p to size n, only if this can be
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/ done without moving p (i.e., only if there is adjacent space
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/ available if n is greater than p's current allocated size, or n is
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/ less than or equal to p's size). This may be used instead of plain
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/ realloc if an alternative allocation strategy is needed upon failure
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/ to expand space, for example, reallocation of a buffer that must be
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/ memory-aligned or cleared. You can use realloc_in_place to trigger
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/ these alternatives only when needed.
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/
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/ @param rdi (p) is address of current allocation
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/ @param rsi (newsize) is number of bytes needed
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/ @return rax is result, or NULL w/ errno
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/ @see dlrealloc_in_place()
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realloc_in_place:
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jmp *hook$realloc_in_place(%rip)
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.endfn realloc_in_place,globl
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.initbss 800,_init_realloc_in_place
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hook$realloc_in_place:
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.quad 0
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.endobj hook$realloc_in_place,globl,hidden
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.previous
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.init.start 800,_init_realloc_in_place
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.hidden dlrealloc_in_place
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ezlea dlrealloc_in_place,ax
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stosq
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.init.end 800,_init_realloc_in_place
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yoink free
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