misc: tegra-profiler: add unwind information

[sojka/nv-tegra/linux-3.10.git] / drivers / misc / tegra-profiler / eh_unwind.c

diff --git a/drivers/misc/tegra-profiler/eh_unwind.c b/drivers/misc/tegra-profiler/eh_unwind.c
index 81a5429bee2105cb0c7086a248ae0f9a4e7b36d5..cc429c72c7b26d2aac45898cd0a3d7e4a4b839ac 100644 (file)
--- a/drivers/misc/tegra-profiler/eh_unwind.c
+++ b/drivers/misc/tegra-profiler/eh_unwind.c
@@ -833,7 +833,8 @@ unwind_exec_insn(struct quadd_extabs_mmap *mmap,
 static long
 unwind_frame(struct ex_region_info *ri,
             struct stackframe *frame,
-            struct vm_area_struct *vma_sp)
+            struct vm_area_struct *vma_sp,
+            unsigned int *unw_type)
 {
        unsigned long high, low;
        const struct unwind_idx *idx;
@@ -913,8 +914,12 @@ unwind_frame(struct ex_region_info *ri,
                        return -QUADD_URC_SP_INCORRECT;
        }
 
-       if (ctrl.vrs[PC] == 0)
+       if (ctrl.vrs[PC] == 0) {
                ctrl.vrs[PC] = ctrl.vrs[LR];
+               *unw_type = QUADD_UNW_TYPE_LR_UT;
+       } else {
+               *unw_type = QUADD_UNW_TYPE_UT;
+       }
 
        if (!validate_pc_addr(ctrl.vrs[PC], sizeof(u32)))
                return -QUADD_URC_PC_INCORRECT;
@@ -936,6 +941,7 @@ unwind_backtrace(struct quadd_callchain *cc,
                 struct vm_area_struct *vma_sp,
                 struct task_struct *task)
 {
+       unsigned int unw_type;
        struct ex_region_info ri_new;
        struct stackframe frame;
 
@@ -988,7 +994,7 @@ unwind_backtrace(struct quadd_callchain *cc,
                        ri = &ri_new;
                }
 
-               err = unwind_frame(ri, &frame, vma_sp);
+               err = unwind_frame(ri, &frame, vma_sp, &unw_type);
                if (err < 0) {
                        pr_debug("end unwind, urc: %ld\n", err);
                        cc->unw_rc = -err;
@@ -1001,7 +1007,7 @@ unwind_backtrace(struct quadd_callchain *cc,
                cc->curr_sp = frame.sp;
                cc->curr_fp = frame.fp_arm;
 
-               nr_added = quadd_callchain_store(cc, frame.pc);
+               nr_added = quadd_callchain_store(cc, frame.pc, unw_type);
                if (nr_added == 0)
                        break;
        }