#include <sys.h> #include <dbglog.h> #include <thread.h> #include <string.h> #include <elf.h> #include <btree.h> // Kernel panic and kernel assert failure static void panic_do(const char* type, const char *msg, const char* file, int line) { asm volatile("cli;"); dbg_printf("/\n| %s:\t%s\n", type, msg); dbg_printf("| File: \t%s:%i\n", file, line); dbg_printf("- trace\n"); dbg_printf("| current thread: 0x%p\n", current_thread); uint32_t *ebp; asm volatile("mov %%ebp, %0":"=r"(ebp)); kernel_stacktrace(ebp[0], ebp[1]); dbg_print_region_info(); dbg_printf("| System halted -_-'\n"); dbg_printf("\\---------------------------------------------------------/"); BOCHS_BREAKPOINT; #ifdef BUILD_KERNEL_TEST dbg_printf("\n(TEST-FAIL)\n"); #endif asm volatile("hlt"); } void sys_panic(const char* message, const char* file, int line) { panic_do("PANIC", message, file, line); while(true); } void sys_panic_assert(const char* assertion, const char* file, int line) { panic_do("ASSERT FAILED", assertion, file, line); while(true); } // ---- kernel symbol map btree_t *kernel_symbol_map = 0; void load_kernel_symbol_table(elf_shdr_t *sym, elf_shdr_t *str) { kernel_symbol_map = create_btree(id_key_cmp_fun, 0); ASSERT (kernel_symbol_map != 0); dbg_printf("Loading kernel symbol table...\n"); ASSERT(sym->sh_entsize == sizeof(elf_sym_t)); unsigned nsym = sym->sh_size / sym->sh_entsize; elf_sym_t *st = (elf_sym_t*)sym->sh_addr; const char* strtab = (const char*)(str->sh_addr); for (unsigned j = 0; j < nsym; j++) { btree_add(kernel_symbol_map, (void*)st[j].st_value, (void*)(strtab + st[j].st_name)); } } void kernel_stacktrace(uint32_t ebp, uint32_t eip) { int i = 0; while (ebp >= K_HIGHHALF_ADDR) { char* sym = 0; void* fn_ptr = 0; if (kernel_symbol_map != 0) { sym = btree_lower(kernel_symbol_map, (void*)eip, &fn_ptr); } dbg_printf("| 0x%p EIP: 0x%p %s +%d\n", ebp, eip, sym, ((void*)eip - fn_ptr)); uint32_t *d = (uint32_t*)ebp; ebp = d[0]; eip = d[1]; if (i++ == 20) { dbg_printf("| ..."); break; } if (eip == 0) break; } } /* vim: set ts=4 sw=4 tw=0 noet :*/