mirror of
https://github.com/jart/cosmopolitan.git
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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
104 lines
4.4 KiB
C
104 lines
4.4 KiB
C
/*-*- 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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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/assert.h"
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#include "libc/calls/calls.h"
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#include "libc/fmt/fmt.h"
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#include "libc/fmt/itoa.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/weaken.h"
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#include "libc/log/backtrace.internal.h"
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#include "libc/macros.internal.h"
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#include "libc/mem/bisectcarleft.internal.h"
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#include "libc/nexgen32e/gc.internal.h"
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#include "libc/nexgen32e/stackframe.h"
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#include "libc/runtime/memtrack.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/runtime/symbols.internal.h"
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#include "libc/str/str.h"
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#include "libc/thread/tls.h"
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#define LIMIT 100
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/**
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* Prints stack frames with symbols.
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*
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* PrintBacktraceUsingSymbols(STDOUT_FILENO, NULL, GetSymbolTable());
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*
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* @param f is output stream
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* @param bp is rbp which can be NULL to detect automatically
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* @param st is open symbol table for current executable
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* @return -1 w/ errno if error happened
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*/
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dontinstrument dontasan int PrintBacktraceUsingSymbols(
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int fd, const struct StackFrame *bp, struct SymbolTable *st) {
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bool ok;
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size_t gi;
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intptr_t addr;
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int i, symbol, addend;
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struct Garbages *garbage;
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const struct StackFrame *frame;
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if (!bp) bp = __builtin_frame_address(0);
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garbage = __tls_enabled ? __get_tls()->tib_garbages : 0;
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gi = garbage ? garbage->i : 0;
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for (i = 0, frame = bp; frame; frame = frame->next) {
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if (kisdangerous(frame)) {
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kprintf("<dangerous frame>\n");
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break;
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}
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if (++i == LIMIT) {
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kprintf("<truncated backtrace>\n");
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break;
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}
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addr = frame->addr;
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#ifdef __x86_64__
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if (addr == (intptr_t)_weaken(__gc)) {
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do {
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--gi;
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} while ((addr = garbage->p[gi].ret) == (intptr_t)_weaken(__gc));
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}
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#endif
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if (addr) {
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if (
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#ifdef __x86_64__
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/*
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* we subtract one to handle the case of noreturn functions
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* with a call instruction at the end, since %rip in such
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* cases will point to the start of the next function.
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* generally %rip always points to the byte after the
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* instruction. one exception is in case like __restore_rt
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* where the kernel creates a stack frame that points to the
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* beginning of the function.
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*/
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(symbol = __get_symbol(st, addr - 1)) != -1 ||
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#endif
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(symbol = __get_symbol(st, addr)) != -1) {
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addend = addr - st->addr_base;
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addend -= st->symbols[symbol].x;
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} else {
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addend = 0;
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}
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} else {
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symbol = 0;
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addend = 0;
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}
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kprintf("%012lx %lx %s%+d\n", frame, addr, __get_symbol_name(st, symbol),
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addend);
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}
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return 0;
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}
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