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Differential D4244 Diff 10424 sys/cddl/dev/dtrace/arm/dtrace_isa.c

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sys/cddl/dev/dtrace/arm/dtrace_isa.c

Show First 20 Lines • Show All 83 Lines • ▼ Show 20 Linesdtrace_getpcstack(pc_t *pcstack, int pcstack_limit, int aframes,
state.registers[FP] = (uint32_t)__builtin_frame_address(0); state.registers[FP] = (uint32_t)__builtin_frame_address(0);
state.registers[SP] = sp; state.registers[SP] = sp;
state.registers[LR] = (uint32_t)__builtin_return_address(0); state.registers[LR] = (uint32_t)__builtin_return_address(0);
state.registers[PC] = (uint32_t)dtrace_getpcstack; state.registers[PC] = (uint32_t)dtrace_getpcstack;
while (depth < pcstack_limit) { while (depth < pcstack_limit) {
int done; int done;
done = unwind_stack_one(&state, 1); done = unwind_stack_one(&state);
/* /*
* NB: Unlike some other architectures, we don't need to * NB: Unlike some other architectures, we don't need to
* explicitly insert cpu_dtrace_caller as it appears in the * explicitly insert cpu_dtrace_caller as it appears in the
* normal kernel stack trace rather than a special trap frame. * normal kernel stack trace rather than a special trap frame.
*/ */
if (aframes > 0) { if (aframes > 0) {
aframes--; aframes--;
▲ Show 20 Lines • Show All 50 Lines • ▼ Show 20 Linesdtrace_getstackdepth(int aframes)
__asm __volatile("mov %0, sp" : "=&r" (sp)); __asm __volatile("mov %0, sp" : "=&r" (sp));
state.registers[FP] = (uint32_t)__builtin_frame_address(0); state.registers[FP] = (uint32_t)__builtin_frame_address(0);
state.registers[SP] = sp; state.registers[SP] = sp;
state.registers[LR] = (uint32_t)__builtin_return_address(0); state.registers[LR] = (uint32_t)__builtin_return_address(0);
state.registers[PC] = (uint32_t)dtrace_getstackdepth; state.registers[PC] = (uint32_t)dtrace_getstackdepth;
do { do {
done = unwind_stack_one(&state, 1); done = unwind_stack_one(&state);
depth++; depth++;
} while (!done); } while (!done);
if (depth < aframes) if (depth < aframes)
return 0; return 0;
else else
return depth - aframes; return depth - aframes;
} }
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