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Add stacktrace to kernel assertion failure message

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This commit is contained in:
Kevin Lange 2016-12-30 18:46:14 +09:00
parent 325e059af2
commit 80664e0f8e
1 changed files with 50 additions and 0 deletions
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50
kernel/sys/panic.c
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@ -8,6 +8,7 @@
#include <system.h>
#include <logging.h>
#include <printf.h>
#include <module.h>
void halt_and_catch_fire(char * error_message, const char * file, int line, struct regs * regs) {
IRQ_OFF;
@ -29,6 +30,36 @@ void halt_and_catch_fire(char * error_message, const char * file, int line, stru
kexit(1);
}
char * probable_function_name(uintptr_t ip, uintptr_t * out_addr) {
char * closest = NULL;
size_t distance = 0xFFFFFFFF;
uintptr_t addr = 0;
if (modules_get_symbols()) {
list_t * hash_keys = hashmap_keys(modules_get_symbols());
foreach(_key, hash_keys) {
char * key = (char *)_key->value;
uintptr_t a = (uintptr_t)hashmap_get(modules_get_symbols(), key);
if (!a) continue;
size_t d = 0xFFFFFFFF;
if (a <= ip) {
d = ip - a;
}
if (d < distance) {
closest = key;
distance = d;
addr = a;
}
}
free(hash_keys);
}
*out_addr = addr;
return closest;
}
void assert_failed(const char *file, uint32_t line, const char *desc) {
IRQ_OFF;
debug_print(INSANE, "Kernel Assertion Failed: %s", desc);
@ -36,6 +67,25 @@ void assert_failed(const char *file, uint32_t line, const char *desc) {
debug_print(INSANE, "Line: %d", line);
debug_print(INSANE, "System Halted!");
#if 1
unsigned int * ebp = (unsigned int *)(&file - 2);
debug_print(INSANE, "Stack trace:");
for (unsigned int frame = 0; frame < 20; ++frame) {
unsigned int eip = ebp[1];
if (eip == 0) break;
ebp = (unsigned int *)(ebp[0]);
unsigned int * args = &ebp[2];
(void)args;
uintptr_t addr;
char * func = probable_function_name(eip, &addr);
debug_print(INSANE, " 0x%x (%s+%d)\n", eip, func, eip-addr);
}
#endif
if (debug_video_crash) {
char msg[4][256];
sprintf(msg[0], "Kernel Assertion Failed: %s", desc);