diff options
Diffstat (limited to 'sys/cddl/dev/dtrace/powerpc/dtrace_isa.c')
| -rw-r--r-- | sys/cddl/dev/dtrace/powerpc/dtrace_isa.c | 57 |
1 files changed, 27 insertions, 30 deletions
diff --git a/sys/cddl/dev/dtrace/powerpc/dtrace_isa.c b/sys/cddl/dev/dtrace/powerpc/dtrace_isa.c index 950e9ac..c6c72a3 100644 --- a/sys/cddl/dev/dtrace/powerpc/dtrace_isa.c +++ b/sys/cddl/dev/dtrace/powerpc/dtrace_isa.c @@ -38,6 +38,7 @@ #include <machine/frame.h> #include <machine/md_var.h> +#include <machine/psl.h> #include <machine/reg.h> #include <machine/stack.h> @@ -54,16 +55,19 @@ #ifdef __powerpc64__ #define OFFSET 4 /* Account for the TOC reload slot */ +#define FRAME_OFFSET 48 #else #define OFFSET 0 +#define FRAME_OFFSET 8 #endif #define INKERNEL(x) ((x) <= VM_MAX_KERNEL_ADDRESS && \ (x) >= VM_MIN_KERNEL_ADDRESS) static __inline int -dtrace_sp_inkernel(uintptr_t sp, int aframes) +dtrace_sp_inkernel(uintptr_t sp) { + struct trapframe *frame; vm_offset_t callpc; #ifdef __powerpc64__ @@ -77,14 +81,15 @@ dtrace_sp_inkernel(uintptr_t sp, int aframes) /* * trapexit() and asttrapexit() are sentinels * for kernel stack tracing. - * - * Special-case this for 'aframes == 0', because fbt sets aframes to the - * trap callchain depth, so we want to break out of it. */ - if ((callpc + OFFSET == (vm_offset_t) &trapexit || - callpc + OFFSET == (vm_offset_t) &asttrapexit) && - aframes != 0) - return (0); + if (callpc + OFFSET == (vm_offset_t) &trapexit || + callpc + OFFSET == (vm_offset_t) &asttrapexit) { + if (sp == 0) + return (0); + frame = (struct trapframe *)(sp + FRAME_OFFSET); + + return ((frame->srr1 & PSL_PR) == 0); + } return (1); } @@ -93,6 +98,7 @@ static __inline uintptr_t dtrace_next_sp(uintptr_t sp) { vm_offset_t callpc; + struct trapframe *frame; #ifdef __powerpc64__ callpc = *(vm_offset_t *)(sp + RETURN_OFFSET64); @@ -103,18 +109,13 @@ dtrace_next_sp(uintptr_t sp) /* * trapexit() and asttrapexit() are sentinels * for kernel stack tracing. - * - * Special-case this for 'aframes == 0', because fbt sets aframes to the - * trap callchain depth, so we want to break out of it. */ if ((callpc + OFFSET == (vm_offset_t) &trapexit || - callpc + OFFSET == (vm_offset_t) &asttrapexit)) - /* Access the trap frame */ -#ifdef __powerpc64__ - return (*(uintptr_t *)sp + 48 + sizeof(register_t)); -#else - return (*(uintptr_t *)sp + 8 + sizeof(register_t)); -#endif + callpc + OFFSET == (vm_offset_t) &asttrapexit)) { + /* Access the trap frame */ + frame = (struct trapframe *)(sp + FRAME_OFFSET); + return (*(uintptr_t *)(frame->fixreg[1])); + } return (*(uintptr_t*)sp); } @@ -122,6 +123,7 @@ dtrace_next_sp(uintptr_t sp) static __inline uintptr_t dtrace_get_pc(uintptr_t sp) { + struct trapframe *frame; vm_offset_t callpc; #ifdef __powerpc64__ @@ -133,18 +135,13 @@ dtrace_get_pc(uintptr_t sp) /* * trapexit() and asttrapexit() are sentinels * for kernel stack tracing. - * - * Special-case this for 'aframes == 0', because fbt sets aframes to the - * trap callchain depth, so we want to break out of it. */ if ((callpc + OFFSET == (vm_offset_t) &trapexit || - callpc + OFFSET == (vm_offset_t) &asttrapexit)) - /* Access the trap frame */ -#ifdef __powerpc64__ - return (*(uintptr_t *)sp + 48 + offsetof(struct trapframe, lr)); -#else - return (*(uintptr_t *)sp + 8 + offsetof(struct trapframe, lr)); -#endif + callpc + OFFSET == (vm_offset_t) &asttrapexit)) { + /* Access the trap frame */ + frame = (struct trapframe *)(sp + FRAME_OFFSET); + return (frame->srr0); + } return (callpc); } @@ -176,7 +173,7 @@ dtrace_getpcstack(pc_t *pcstack, int pcstack_limit, int aframes, if (sp <= osp) break; - if (!dtrace_sp_inkernel(sp, aframes)) + if (!dtrace_sp_inkernel(sp)) break; callpc = dtrace_get_pc(sp); @@ -537,7 +534,7 @@ dtrace_getstackdepth(int aframes) if (sp <= osp) break; - if (!dtrace_sp_inkernel(sp, aframes)) + if (!dtrace_sp_inkernel(sp)) break; if (aframes == 0) |
