mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 06:53:33 +00:00
6e6fc38935
Commit bc6c183 introduced a bunch of discrepancies between what files
look like in the repo and what clang-format says they should look like.
However, there were already a few discrepancies prior to that. Most of
these discrepancies seemed to be unintentional, but a few of them were
load-bearing (e.g., a #include that violated header ordering needing
something to have been #defined by a 'later' #include.)
I opted to take what I hope is a relatively smooth-brained approach: I
reverted the .clang-format change, ran clang-format on the whole repo,
reapplied the .clang-format change, reran clang-format again, and then
reverted the commit that contained the first run. Thus the full effect
of this PR should only be to apply the changed formatting rules to the
repo, and from skimming the results, this seems to be the case.
My work can be checked by applying the short, manual commits, and then
rerunning the command listed in the autogenerated commits (those whose
messages I have prefixed auto:) and seeing if your results agree.
It might be that the other diffs should be fixed at some point but I'm
leaving that aside for now.
fd '\.c(c|pp)?$' --print0| xargs -0 clang-format -i
119 lines
5.3 KiB
C
119 lines
5.3 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 2021 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/dce.h"
|
|
#include "libc/intrin/promises.internal.h"
|
|
#include "libc/intrin/strace.internal.h"
|
|
#include "libc/intrin/weaken.h"
|
|
#include "libc/nexgen32e/vendor.internal.h"
|
|
#include "libc/nt/enum/status.h"
|
|
#include "libc/nt/runtime.h"
|
|
#include "libc/nt/thunk/msabi.h"
|
|
#include "libc/runtime/internal.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/sysv/consts/nr.h"
|
|
#include "libc/sysv/consts/sig.h"
|
|
|
|
/**
|
|
* Terminates process, ignoring destructors and atexit() handlers.
|
|
*
|
|
* Exit codes are narrowed to an unsigned char on most platforms. The
|
|
* exceptions would be Windows, NetBSD, and OpenBSD, which should let
|
|
* you have larger exit codes.
|
|
*
|
|
* When running on bare metal, this function will reboot your computer
|
|
* by hosing the interrupt descriptors and triple faulting the system.
|
|
*
|
|
* @asyncsignalsafe
|
|
* @vforksafe
|
|
* @noreturn
|
|
*/
|
|
wontreturn void _Exit(int exitcode) {
|
|
STRACE("_Exit(%d)", exitcode);
|
|
if (!IsWindows() && !IsMetal()) {
|
|
// On Linux _Exit1 (exit) must be called in pledge("") mode. If we
|
|
// call _Exit (exit_group) when we haven't used pledge("stdio") then
|
|
// it'll terminate the process instead. On OpenBSD we must not call
|
|
// _Exit1 (__threxit) because only _Exit (exit) is whitelisted when
|
|
// operating in pledge("") mode.
|
|
if (!(IsLinux() && !PLEDGED(STDIO))) {
|
|
#ifdef __x86_64__
|
|
asm volatile("syscall"
|
|
: /* no outputs */
|
|
: "a"(__NR_exit_group), "D"(exitcode)
|
|
: "rcx", "r11", "memory");
|
|
#elif defined(__aarch64__)
|
|
register long x0 asm("x0") = exitcode;
|
|
register long x8 asm("x8") = IsLinux() ? 94 : 1;
|
|
asm volatile("mov\tx16,%1\n\t"
|
|
"svc\t0"
|
|
: /* no outputs */
|
|
: "r"(x8), "i"(1), "r"(x0)
|
|
: "x16", "memory");
|
|
#else
|
|
#error "unsupported architecture"
|
|
#endif
|
|
}
|
|
// Inline _Exit1() just in case _Exit() isn't allowed by pledge()
|
|
#ifdef __x86_64__
|
|
asm volatile("syscall"
|
|
: /* no outputs */
|
|
: "a"(__NR_exit), "D"(exitcode)
|
|
: "rcx", "r11", "memory");
|
|
#else
|
|
register long r0 asm("x0") = exitcode;
|
|
register long x8 asm("x8") = IsLinux() ? 93 : 431;
|
|
asm volatile("mov\tx16,%1\n\t"
|
|
"svc\t0"
|
|
: /* no outputs */
|
|
: "r"(x8), "i"(0x169), "r"(r0)
|
|
: "memory");
|
|
#endif
|
|
} else if (IsWindows()) {
|
|
uint32_t waitstatus;
|
|
// What Microsoft calls an exit code, POSIX calls a status code. See
|
|
// also the WEXITSTATUS() and WIFEXITED() macros that POSIX defines.
|
|
waitstatus = exitcode;
|
|
waitstatus <<= 8;
|
|
// "The GetExitCodeProcess function returns a valid error code
|
|
// defined by the application only after the thread terminates.
|
|
// Therefore, an application should not use kNtStillActive (259) as
|
|
// an error code (kNtStillActive is a macro for kNtStatusPending).
|
|
// If a thread returns kNtStillActive (259) as an error code, then
|
|
// applications that test for that value could interpret it to mean
|
|
// that the thread is still running, and continue to test for the
|
|
// completion of the thread after the thread has terminated, which
|
|
// could put the application into an infinite loop." -Quoth MSDN
|
|
if (waitstatus == kNtStillActive) {
|
|
waitstatus = 0xc9af3d51u;
|
|
}
|
|
TerminateThisProcess(waitstatus);
|
|
}
|
|
#ifdef __x86_64__
|
|
asm("push\t$0\n\t"
|
|
"push\t$0\n\t"
|
|
"cli\n\t"
|
|
"lidt\t(%rsp)");
|
|
for (;;)
|
|
asm("ud2");
|
|
#else
|
|
__builtin_unreachable();
|
|
#endif
|
|
}
|
|
|
|
__strong_reference(_Exit, _exit);
|