mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-12 09:17:53 +00:00
7e0a09feec
This change ports APE Loader to Linux AARCH64, so that Raspberry Pi users can run programs like redbean, without the executable needing to modify itself. Progress has also slipped into this change on the issue of making progress better conforming to user expectations and industry standards regarding which symbols we're allowed to declare
71 lines
3.3 KiB
C
71 lines
3.3 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 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/assert.h"
|
|
#include "libc/intrin/bsr.h"
|
|
#include "libc/intrin/cxaatexit.internal.h"
|
|
#include "libc/intrin/strace.internal.h"
|
|
#include "libc/intrin/weaken.h"
|
|
#include "libc/macros.internal.h"
|
|
#include "libc/mem/mem.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
__static_yoink("__cxa_finalize");
|
|
|
|
/**
|
|
* Adds global destructor.
|
|
*
|
|
* Destructors are called in reverse order. They won't be called if the
|
|
* program aborts or _exit() is called. Invocations of this function are
|
|
* usually generated by the C++ compiler. Behavior is limitless if some
|
|
* other module has linked calloc().
|
|
*
|
|
* @param fp is void(*)(T)
|
|
* @param arg is passed to callback
|
|
* @param pred can be non-null for things like dso modules
|
|
* @return 0 on success or nonzero w/ errno
|
|
* @note folks have forked libc in past just to unbloat atexit()
|
|
*/
|
|
dontasan int __cxa_atexit(void *fp, void *arg, void *pred) {
|
|
/* asan runtime depends on this function */
|
|
unsigned i;
|
|
struct CxaAtexitBlock *b, *b2;
|
|
_Static_assert(ATEXIT_MAX == CHAR_BIT * sizeof(b->mask), "");
|
|
__cxa_lock();
|
|
b = __cxa_blocks.p;
|
|
if (!b) b = __cxa_blocks.p = &__cxa_blocks.root;
|
|
if (!~b->mask) {
|
|
if (_weaken(calloc) &&
|
|
(b2 = _weaken(calloc)(1, sizeof(struct CxaAtexitBlock)))) {
|
|
b2->next = b;
|
|
__cxa_blocks.p = b = b2;
|
|
} else {
|
|
__cxa_unlock();
|
|
return enomem();
|
|
}
|
|
}
|
|
i = _bsr(~b->mask);
|
|
unassert(i < ARRAYLEN(b->p));
|
|
b->mask |= 1u << i;
|
|
b->p[i].fp = fp;
|
|
b->p[i].arg = arg;
|
|
b->p[i].pred = pred;
|
|
__cxa_unlock();
|
|
return 0;
|
|
}
|