41 lines
2.6 KiB
ArmAsm
41 lines
2.6 KiB
ArmAsm
/*-*- mode:asm; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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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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.source __FILE__
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/ Allocates aligned memory.
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/
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/ Returns a pointer to a newly allocated chunk of n bytes, aligned in
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/ accord with the alignment argument. The alignment argument should be
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/ a power of two. If the argument is not a power of two, the nearest
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/ greater power is used. 8-byte alignment is guaranteed by normal
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/ malloc calls, so don't bother calling memalign with an argument of 8
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/ or less.
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/
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/ @param rdi is alignment in bytes
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/ @param rsi (newsize) is number of bytes needed
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/ @return rax is memory address, or NULL w/ errno
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/ @note overreliance on memalign is a sure way to fragment space
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/ @see dlmemalign()
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memalign:
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jmp *hook$memalign(%rip)
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.endfn memalign,globl
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