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  • kernel/arch/sparc64/src/debug/stacktrace.c

    rd99c1d2 r819a768  
    3737#include <typedefs.h>
    3838
     39#include <arch.h>
     40#include <arch/stack.h>
     41#include <arch/trap/trap_table.h>
     42
     43#if defined(SUN4V)
     44#include <arch/sun4v/arch.h>
     45#endif
     46
     47#define FRAME_OFFSET_FP_PREV    14
     48#define FRAME_OFFSET_RA         15
     49
     50extern void alloc_window_and_flush(void);
     51
    3952bool kernel_frame_pointer_validate(uintptr_t fp)
    4053{
    41         return false;
     54        uintptr_t kstack;
     55       
     56#if defined(SUN4U)
     57        kstack = read_from_ag_g6();
     58#elif defined(SUN4V)
     59        kstack = asi_u64_read(ASI_SCRATCHPAD, SCRATCHPAD_KSTACK);
     60#endif
     61
     62        kstack += STACK_BIAS;
     63        kstack -= PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE;
     64
     65        if (THREAD && (fp == kstack))
     66                return false;
     67        return fp != 0;
    4268}
    4369
    4470bool kernel_frame_pointer_prev(uintptr_t fp, uintptr_t *prev)
    4571{
    46         return false;
     72        uint64_t *stack = (void *) fp;
     73        alloc_window_and_flush();
     74        *prev = stack[FRAME_OFFSET_FP_PREV] + STACK_BIAS;
     75        return true;
    4776}
    4877
    4978bool kernel_return_address_get(uintptr_t fp, uintptr_t *ra)
    5079{
    51         return false;
     80        uint64_t *stack = (void *) fp;
     81        alloc_window_and_flush();
     82        *ra = stack[FRAME_OFFSET_RA];
     83        return true;
    5284}
    5385
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