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Give Emacs another performance boost

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Justine Tunney 2023-08-18 09:34:14 -07:00
parent 5b42c810a5
commit 9c7b81ee0f
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30 changed files with 253 additions and 102 deletions
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libc/intrin/__getauxval.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/getauxval.internal.h"
#include "libc/runtime/runtime.h"
/**
* Returns auxiliary value better.
*
* @param at is `AT_...` search key
* @return true if value was found
* @see libc/sysv/consts.sh
* @see System Five Application Binary Interface § 3.4.3
* @asyncsignalsafe
*/
dontasan struct AuxiliaryValue __getauxval(unsigned long at) {
unsigned long *ap;
for (ap = __auxv; ap[0]; ap += 2) {
if (at == ap[0]) {
return (struct AuxiliaryValue){ap[1], true};
}
}
return (struct AuxiliaryValue){0, false};
}