51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
#include "stack.h"
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#include "types.h"
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#include "vga.h"
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extern vaddr_t _stack_bottom;
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extern vaddr_t _stack_top;
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void printStackTrace(unsigned int maxFrames)
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{
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#ifdef DEBUG
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// Now on Stack:
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// ( potential second function argument )
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// first function argument (maxFrames)
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// return address from caller
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// EBP (Extended Base Pointer) of calling function
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//
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// retrace function from address could done by optaining function address with gdb or
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// objdump -S kernel
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unsigned int *ebp = __builtin_frame_address(0);
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for (unsigned int frame = 0; frame < maxFrames; frame++) {
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unsigned int eip = ebp[1];
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if (eip == 0) {
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// No caller on stack
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break;
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}
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unsigned int *arguments = ebp + 2;
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printf("[%d] 0x%x (", frame, eip);
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int nbArg = 0;
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do {
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if ((_stack_bottom <= (vaddr_t)arguments) &&
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((vaddr_t)arguments <= _stack_top)) {
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printf(" 0x%x", *arguments);
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arguments += 1;
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} else {
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break;
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}
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nbArg++;
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if (nbArg >= 4) {
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break;
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}
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} while (1);
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printf(")\n");
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ebp = (unsigned int *)(ebp[0]);
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}
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#else
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printf("Must be compiled with -fno-omit-frame-pointer for full stack\n");
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unsigned int *ebp = &maxFrames - 2;
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unsigned int eip = ebp[1];
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printf("[0] 0x%x\n", eip);
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#endif
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}
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