trace.c

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#include <core/system.h>
#include <mm/mm.h>
 
int __printing_trace = 0;
 
/* Prints the current stack trace, the return address of each frame. */
void arch_stack_trace(void)
{
    __printing_trace = 1;
    printk("stack trace:\n");
 
    uintptr_t *fp = __builtin_frame_address(0);
 
    for (int i = 0; i < 32 && fp && (uintptr_t) fp >= ARCH_DMAP_BASE; ++i) {
        printk("  [%p]\n", (void *) fp[1]);
        fp = (uintptr_t *) fp[0];
    }
 
    __printing_trace = 0;
}