mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
56 lines
2.7 KiB
C
56 lines
2.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2023 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/runtime/runtime.h"
|
|
#include "libc/runtime/symbols.internal.h"
|
|
|
|
extern struct SymbolTable *__symtab;
|
|
|
|
/**
|
|
* Returns low index into symbol table for address.
|
|
*
|
|
* @param t if null will be auto-populated only if already open
|
|
* @return index or -1 if nothing found
|
|
*/
|
|
privileged int __get_symbol(struct SymbolTable *t, intptr_t a) {
|
|
// we need privileged because:
|
|
// kprintf is privileged and it depends on this
|
|
// we don't want function tracing because:
|
|
// function tracing depends on this function via kprintf
|
|
unsigned l, m, r, n, k;
|
|
if (!t && __symtab) {
|
|
t = __symtab;
|
|
}
|
|
if (t) {
|
|
l = 0;
|
|
r = n = t->count;
|
|
k = a - t->addr_base;
|
|
while (l < r) {
|
|
m = (l & r) + ((l ^ r) >> 1); // floor((a+b)/2)
|
|
if (t->symbols[m].y < k) {
|
|
l = m + 1;
|
|
} else {
|
|
r = m;
|
|
}
|
|
}
|
|
if (l < n && t->symbols[l].x <= k && k <= t->symbols[l].y) {
|
|
return l;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|