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Differential D27357 Diff 80449 head/sys/cddl/dev/dtrace/riscv/dtrace_isa.c

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head/sys/cddl/dev/dtrace/riscv/dtrace_isa.c

Show First 20 Lines • Show All 84 Lines • ▼ Show 20 Linesdtrace_getpcstack(pc_t *pcstack, int pcstack_limit, int aframes,
__asm __volatile("mv %0, sp" : "=&r" (sp)); __asm __volatile("mv %0, sp" : "=&r" (sp));
state.fp = (uintptr_t)__builtin_frame_address(0); state.fp = (uintptr_t)__builtin_frame_address(0);
state.sp = sp; state.sp = sp;
state.pc = (uintptr_t)dtrace_getpcstack; state.pc = (uintptr_t)dtrace_getpcstack;
while (depth < pcstack_limit) { while (depth < pcstack_limit) {
if (unwind_frame(&state)) if (!unwind_frame(curthread, &state))
break; break;
if (!INKERNEL(state.pc) || !INKERNEL(state.fp)) if (!INKERNEL(state.pc) || !INKERNEL(state.fp))
break; break;
/* /*
* 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
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int int
dtrace_getstackdepth(int aframes) dtrace_getstackdepth(int aframes)
{ {
struct unwind_state state; struct unwind_state state;
int scp_offset; int scp_offset;
register_t sp; register_t sp;
int depth; int depth;
int done; bool done;
depth = 1; depth = 1;
done = 0; done = false;
__asm __volatile("mv %0, sp" : "=&r" (sp)); __asm __volatile("mv %0, sp" : "=&r" (sp));
state.fp = (uintptr_t)__builtin_frame_address(0); state.fp = (uintptr_t)__builtin_frame_address(0);
state.sp = sp; state.sp = sp;
state.pc = (uintptr_t)dtrace_getstackdepth; state.pc = (uintptr_t)dtrace_getstackdepth;
do { do {
done = unwind_frame(&state); done = !unwind_frame(curthread, &state);
if (!INKERNEL(state.pc) || !INKERNEL(state.fp)) if (!INKERNEL(state.pc) || !INKERNEL(state.fp))
break; break;
depth++; depth++;
} while (!done); } while (!done);
if (depth < aframes) if (depth < aframes)
return (0); return (0);
else else
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