mirror of https://github.com/proxmox/mirror_qemu
96 lines
2.1 KiB
C
96 lines
2.1 KiB
C
/*
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* Debug information support.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "qemu/osdep.h"
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#include "qemu/lockable.h"
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#include "tcg/debuginfo.h"
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#include <elfutils/libdwfl.h>
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static QemuMutex lock;
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static Dwfl *dwfl;
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static const Dwfl_Callbacks dwfl_callbacks = {
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.find_elf = NULL,
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.find_debuginfo = dwfl_standard_find_debuginfo,
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.section_address = NULL,
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.debuginfo_path = NULL,
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};
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__attribute__((constructor))
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static void debuginfo_init(void)
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{
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qemu_mutex_init(&lock);
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}
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void debuginfo_report_elf(const char *name, int fd, uint64_t bias)
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{
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QEMU_LOCK_GUARD(&lock);
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if (dwfl) {
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dwfl_report_begin_add(dwfl);
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} else {
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dwfl = dwfl_begin(&dwfl_callbacks);
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}
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if (dwfl) {
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dwfl_report_elf(dwfl, name, name, fd, bias, true);
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dwfl_report_end(dwfl, NULL, NULL);
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}
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}
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void debuginfo_lock(void)
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{
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qemu_mutex_lock(&lock);
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}
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void debuginfo_query(struct debuginfo_query *q, size_t n)
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{
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const char *symbol, *file;
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Dwfl_Module *dwfl_module;
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Dwfl_Line *dwfl_line;
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GElf_Off dwfl_offset;
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GElf_Sym dwfl_sym;
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size_t i;
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int line;
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if (!dwfl) {
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return;
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}
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for (i = 0; i < n; i++) {
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dwfl_module = dwfl_addrmodule(dwfl, q[i].address);
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if (!dwfl_module) {
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continue;
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}
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if (q[i].flags & DEBUGINFO_SYMBOL) {
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symbol = dwfl_module_addrinfo(dwfl_module, q[i].address,
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&dwfl_offset, &dwfl_sym,
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NULL, NULL, NULL);
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if (symbol) {
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q[i].symbol = symbol;
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q[i].offset = dwfl_offset;
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}
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}
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if (q[i].flags & DEBUGINFO_LINE) {
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dwfl_line = dwfl_module_getsrc(dwfl_module, q[i].address);
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if (dwfl_line) {
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file = dwfl_lineinfo(dwfl_line, NULL, &line, 0, NULL, NULL);
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if (file) {
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q[i].file = file;
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q[i].line = line;
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}
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}
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}
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}
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}
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void debuginfo_unlock(void)
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{
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qemu_mutex_unlock(&lock);
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}
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