90 lines
3.2 KiB
C
90 lines
3.2 KiB
C
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#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/bits/pushpop.h"
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#include "libc/calls/ucontext.h"
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#include "libc/log/log.h"
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#include "libc/math.h"
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#include "libc/nt/enum/errormodeflags.h"
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#include "libc/nt/signals.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/stdio.h"
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/**
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* @fileoverview Demonstrates SEGFAULT via NULL pointer dereference.
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*
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* In MODE=dbg mode, UBSAN should catch this and display a backtrace.
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* In most other modes, e.g. MODE=balanced, the oncrash.c sig handler
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* will either launch GDB or display a very fancy report.
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*
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* make -j8 -O MODE=opt o/opt/examples/crashreportdemo.com
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* o/opt/examples/crashreportdemo.com
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*
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* To prevent the GDB GUI from popping up:
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*
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* export GDB=""
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* make -j8 -O MODE=opt o/opt/examples/crashreportdemo.com
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* o/opt/examples/crashreportdemo.com
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*/
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int boo;
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void boop(void);
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int main(int argc, char *argv[]) {
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int64_t res;
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showcrashreports();
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res = 0;
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asm volatile(
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"mov\t$0x1111111111111111,%rax\n\t"
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"mov\t$0x3333333333333333,%rcx\n\t"
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"mov\t$0x4444444444444444,%rdx\n\t"
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"mov\t$0x8888888888888888,%r8\n\t"
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"mov\t$0x9999999999999999,%r9d\n\t"
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"mov\t$0xaaaaaaaaaaaaaaaa,%r10d\n\t"
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"mov\t$0xbbbbbbbbbbbbbbbb,%r11d\n\t"
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"mov\t$0x0000000000000000,%rax\n\t"
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"movd\t%rax,%xmm0\n\t"
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"mov\t$0x1111111111111111,%rax\n\t"
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"movd\t%rax,%xmm1\n\t"
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"mov\t$0x2222222222222222,%rax\n\t"
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"movd\t%rax,%xmm2\n\t"
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"mov\t$0x3333333333333333,%rax\n\t"
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"movd\t%rax,%xmm3\n\t"
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"mov\t$0x4444444444444444,%rax\n\t"
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"movd\t%rax,%xmm4\n\t"
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"mov\t$0x5555555555555555,%rax\n\t"
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"movd\t%rax,%xmm5\n\t"
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"mov\t$0x6666666666666666,%rax\n\t"
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"movd\t%rax,%xmm6\n\t"
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"mov\t$0x7777777777777777,%rax\n\t"
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"movd\t%rax,%xmm7\n\t"
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"mov\t$0x8888888888888888,%rax\n\t"
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"movd\t%rax,%xmm8\n\t"
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"mov\t$0x9999999999999999,%rax\n\t"
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"movd\t%rax,%xmm9\n\t"
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"mov\t$0xaaaaaaaaaaaaaaaa,%rax\n\t"
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"movd\t%rax,%xmm10\n\t"
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"mov\t$0xbbbbbbbbbbbbbbbb,%rax\n\t"
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"movd\t%rax,%xmm11\n\t"
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"mov\t$0xcccccccccccccccc,%rax\n\t"
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"movd\t%rax,%xmm12\n\t"
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"mov\t$0xdddddddddddddddd,%rax\n\t"
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"movd\t%rax,%xmm13\n\t"
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"mov\t$0xeeeeeeeeeeeeeeee,%rax\n\t"
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"movd\t%rax,%xmm14\n\t"
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"mov\t$0xffffffffffffffff,%rax\n\t"
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"movd\t%rax,%xmm15\n\t"
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"fldlg2\n\t");
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res = *(int *)(intptr_t)boo / boo;
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return res;
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}
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