mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
0277d7d6e9
It's now possible to build our pledge() polyfill as a dynamic shared object that can be injected into a glibc executable using LD_PRELOAD
56 lines
2.8 KiB
C
56 lines
2.8 KiB
C
/*-*- 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 2022 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/calls/strace.internal.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/kprintf.h"
|
|
#include "libc/intrin/promises.internal.h"
|
|
#include "libc/nt/thread.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/sysv/consts/nr.h"
|
|
|
|
/**
|
|
* Terminates thread with raw system call.
|
|
*
|
|
* @param rc only works on Linux and Windows
|
|
* @see cthread_exit()
|
|
* @threadsafe
|
|
* @noreturn
|
|
*/
|
|
privileged wontreturn void _Exit1(int rc) {
|
|
struct WinThread *wt;
|
|
STRACE("_Exit1(%d)", rc);
|
|
if (!IsWindows() && !IsMetal()) {
|
|
if (IsOpenbsd() && !PLEDGED(STDIO)) {
|
|
asm volatile("syscall"
|
|
: /* no outputs */
|
|
: "a"(__NR_exit), "D"(rc)
|
|
: "rcx", "r11", "memory");
|
|
}
|
|
asm volatile("xor\t%%r10d,%%r10d\n\t"
|
|
"syscall"
|
|
: /* no outputs */
|
|
: "a"(__NR_exit), "D"(IsLinux() ? rc : 0), "S"(0), "d"(0)
|
|
: "rcx", "r10", "r11", "memory");
|
|
} else if (IsWindows()) {
|
|
ExitThread(rc);
|
|
}
|
|
for (;;) {
|
|
asm("ud2");
|
|
}
|
|
}
|