62 lines
3.2 KiB
C
62 lines
3.2 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "ape/config.h"
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#include "libc/bits/bits.h"
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#include "libc/bits/pushpop.h"
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#include "libc/nt/process.h"
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#include "libc/runtime/internal.h"
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#include "libc/runtime/missioncritical.h"
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#include "libc/sysv/consts/fileno.h"
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#include "libc/sysv/consts/nr.h"
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#define STACK_SMASH_MESSAGE "stack smashed\n"
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/**
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* Aborts program under enemy fire to avoid being taken alive.
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*/
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void __stack_chk_fail(void) {
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if (!IsWindows()) {
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const char *const msg = STACK_SMASH_MESSAGE;
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const size_t len = pushpop(sizeof(STACK_SMASH_MESSAGE) - 1);
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if (!IsMetal()) {
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unsigned ax;
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asm volatile("syscall"
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: "=a"(ax)
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: "0"(__NR_write), "D"(pushpop(STDERR_FILENO)), "S"(msg),
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"d"(len)
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: "rcx", "r11", "cc", "memory");
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asm volatile("syscall"
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: "=a"(ax)
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: "0"(__NR_exit), "D"(pushpop(88))
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: "rcx", "r11", "cc", "memory");
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}
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short(*ttys)[4] = (short(*)[4])XLM(BIOS_DATA_AREA);
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unsigned long si;
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unsigned cx;
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asm volatile("rep outsb"
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: "=S"(si), "=c"(cx)
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: "0"(msg), "1"(len), "d"((*ttys)[1 /*COM2*/])
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: "memory");
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triplf();
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}
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NT_TERMINATE_PROCESS();
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for (;;) TerminateProcess(GetCurrentProcess(), 42);
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}
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