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Implemented support for the ARM64 "bt -e" option.

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(anderson@redhat.com)
This commit is contained in:
Dave Anderson 2014-04-03 10:23:10 -04:00
parent 13f25a3e58
commit 12e9faa3cd
1 changed files with 51 additions and 5 deletions
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56
arm64.c
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@ -803,9 +803,58 @@ arm64_stackframe_init(void)
task_struct_thread + thread_struct_cpu_context + context_pc;
}
#define KERNEL_MODE (1)
#define USER_MODE (2)
#define USER_EFRAME_OFFSET (304)
/*
* PSR bits
*/
#define PSR_MODE_EL0t 0x00000000
#define PSR_MODE_EL1t 0x00000004
#define PSR_MODE_EL1h 0x00000005
#define PSR_MODE_EL2t 0x00000008
#define PSR_MODE_EL2h 0x00000009
#define PSR_MODE_EL3t 0x0000000c
#define PSR_MODE_EL3h 0x0000000d
#define PSR_MODE_MASK 0x0000000f
static int arm64_eframe_search(struct bt_info *bt)
{
return (NOT_IMPLEMENTED(FATAL));
ulong ptr, count;
struct arm64_pt_regs *regs;
count = 0;
for (ptr = bt->stackbase; ptr < bt->stacktop - SIZE(pt_regs); ptr++) {
regs = (struct arm64_pt_regs *)&bt->stackbuf[(ulong)(STACK_OFFSET_TYPE(ptr))];
if (INSTACK(regs->sp, bt) && INSTACK(regs->regs[29], bt) &&
!(regs->pstate & (0xffffffff00000000ULL | PSR_MODE32_BIT)) &&
is_kernel_text(regs->pc) &&
is_kernel_text(regs->regs[30])) {
switch (regs->pstate & PSR_MODE_MASK)
{
case PSR_MODE_EL1t:
case PSR_MODE_EL1h:
fprintf(fp,
"\nKERNEL-MODE EXCEPTION FRAME AT: %lx\n", ptr);
arm64_print_exception_frame(bt, ptr, KERNEL_MODE);
count++;
break;
}
}
}
if (is_kernel_thread(bt->tc->task))
return count;
ptr = bt->stacktop - USER_EFRAME_OFFSET;
fprintf(fp, "%sUSER-MODE EXCEPTION FRAME AT: %lx\n",
count++ ? "\n" : "", ptr);
arm64_print_exception_frame(bt, ptr, USER_MODE);
return count;
}
static int
@ -876,9 +925,6 @@ static int arm64_unwind_frame(struct bt_info *bt, struct arm64_stackframe *frame
return TRUE;
}
#define KERNEL_MODE (1)
#define USER_MODE (2)
static void arm64_back_trace_cmd(struct bt_info *bt)
{
struct arm64_stackframe stackframe;
@ -932,7 +978,7 @@ static void arm64_back_trace_cmd(struct bt_info *bt)
return;
complete_user:
exception_frame = bt->stacktop - 304;
exception_frame = bt->stacktop - USER_EFRAME_OFFSET;
arm64_print_exception_frame(bt, exception_frame, USER_MODE);
}