103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
#include <common.h>
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#include <linux/compiler.h>
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#include <asm/proc-armv/ptrace.h>
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#include <asm/global_data.h>
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DECLARE_GLOBAL_DATA_PTR;
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void print_symbol(unsigned long addr, unsigned long offset)
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{
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const char *sym;
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unsigned long base;
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unsigned long end;
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unsigned long size;
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unsigned long faddr = addr - offset;
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extern const char *symbol_lookup(unsigned long addr, unsigned long *caddr,
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unsigned long *naddr);
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sym = symbol_lookup(faddr, &base, &end);
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if (sym) {
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size = end - base;
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pr_printf("[<%016lx>] %s+0x%lx/0x%lx\n", addr, sym,
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addr - (base + offset), size);
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} else {
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pr_printf("[<%016lx>] %s\n", addr, "N/A");
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}
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}
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static int unwind_frame(struct stackframe *frame)
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{
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unsigned long fp = frame->fp;
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unsigned long stack_high;
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unsigned long stack_low;
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stack_low = frame->sp;
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stack_high = gd->start_addr_sp;
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frame->fp = *(unsigned long *)(fp);
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if (frame->fp < stack_low || fp >= stack_high - 0x10)
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return -1;
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frame->sp = fp + 0x10;
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/*
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* -4 here because we care about the PC not
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* where the return will go
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*/
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frame->pc = *(unsigned long *)(fp + 8) - 4;
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return 0;
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}
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int dump_backtrace(struct pt_regs *regs)
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{
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struct stackframe frame;
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unsigned long offset;
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/*
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* this current_sp use asm ("sp") it is register vary, it has value,
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* don't be init again, ignor coverity report
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* coverity[var_decl][missing_initializer_on_const][caretline
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*/
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/* coverity[missing_initializer_on_const]*/
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const register unsigned long current_sp asm ("sp");
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int ret;
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offset = gd->reloc_off;
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memset(&frame, 0x00, sizeof(frame));
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if (regs) {
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frame.fp = regs->regs[29];
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frame.sp = regs->regs[29];
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frame.pc = regs->elr;
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} else {
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frame.fp = (unsigned long)__builtin_frame_address(0);
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/*
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* +0x10 to reach the real bottom of
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* the curent frame
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*/
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/*
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* this current_sp use asm ("sp") it is register vary, it has value,
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* don't be init again, ignor coverity report
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* coverity[var_decl][missing_initializer_on_const][caretline]
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*/
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/* coverity[uninit_use] */
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frame.sp = current_sp + 0x10;
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frame.pc = (unsigned long)dump_backtrace;
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}
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pr_printf("\n Call trace: \n");
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while (1) {
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unsigned long where = frame.pc;
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print_symbol(where, offset);
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ret = unwind_frame(&frame);
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if (ret < 0)
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break;
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}
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return 0;
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}
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void stack_dump(void)
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{
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dump_backtrace(NULL);
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}
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