78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
#include <stddef.h>
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#include <stdint.h>
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#include <lib/trace.h>
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#include <lib/blib.h>
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#include <lib/config.h>
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#include <lib/print.h>
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#include <lib/uri.h>
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#include <fs/file.h>
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#include <mm/pmm.h>
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#if bios == 1
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extern symbol stage2_map;
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#elif uefi == 1
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extern symbol ImageBase;
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#endif
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extern symbol full_map;
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static char *trace_address(size_t *off, size_t addr) {
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char *limine_map;
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#if bios == 1
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if (!stage3_loaded)
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limine_map = stage2_map;
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else
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limine_map = full_map;
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#elif uefi == 1
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limine_map = full_map;
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addr -= (size_t)ImageBase;
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#endif
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uintptr_t prev_addr = 0;
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char *prev_sym = NULL;
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for (size_t i = 0;;) {
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if (*((uintptr_t *)&limine_map[i]) >= addr) {
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*off = addr - prev_addr;
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return prev_sym;
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}
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prev_addr = *((uintptr_t *)&limine_map[i]);
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i += sizeof(uintptr_t);
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prev_sym = &limine_map[i];
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while (limine_map[i++] != 0);
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}
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}
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void print_stacktrace(size_t *base_ptr) {
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if (base_ptr == NULL) {
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asm volatile (
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#if defined (__i386__)
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"movl %%ebp, %0"
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#elif defined (__x86_64__)
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"movq %%rbp, %0"
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#endif
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: "=g"(base_ptr)
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:: "memory"
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);
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}
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print("Stacktrace:\n");
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for (;;) {
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size_t old_bp = base_ptr[0];
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size_t ret_addr = base_ptr[1];
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if (!ret_addr)
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break;
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size_t off;
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char *name = trace_address(&off, ret_addr);
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if (name)
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print(" [%p] <%s+%p>\n", ret_addr, name, off);
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else
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print(" [%p]\n", ret_addr);
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if (!old_bp)
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break;
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base_ptr = (void*)old_bp;
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}
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print("End of trace. ");
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}
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