[Crash-utility] [PATCH 12/16] MIPS64: Add 'bt -f' command support
Add 'bt -f' command support, display all stack data contained in a frame.
E.g. With this patch:
crash> bt -f
PID: 4768 TASK: 9800000243bcf200 CPU: 3 COMMAND: "bash"
#0 [980000024291f930] __crash_kexec at ffffffff802fff84
[PC: ffffffff802fff84 RA: ffffffff80248cac SP: 980000024291f930 SIZE: 368]
980000024291f930: ffffffff81239060 ffffffff802a9944
980000024291f940: 0000000000000001 9800000254f3c400
...
Signed-off-by: Huacai Chen <chenhuacai(a)loongson.cn>
Signed-off-by: Youling Tang <tangyouling(a)loongson.cn>
---
mips64.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)
diff --git a/mips64.c b/mips64.c
index d949af4..2708f5d 100644
--- a/mips64.c
+++ b/mips64.c
@@ -37,6 +37,9 @@ static void mips64_dump_backtrace_entry(struct bt_info *bt,
struct mips64_unwind_frame *previous, int level);
static void mips64_dump_exception_stack(struct bt_info *bt, char *pt_regs);
static int mips64_is_exception_entry(struct syment *sym);
+static void mips64_display_full_frame(struct bt_info *bt,
+ struct mips64_unwind_frame *current,
+ struct mips64_unwind_frame *previous);
static void mips64_stackframe_init(void);
static void mips64_get_stack_frame(struct bt_info *bt, ulong *pcp, ulong *spp);
static int mips64_get_dumpfile_stack_frame(struct bt_info *bt,
@@ -648,6 +651,15 @@ mips64_dump_backtrace_entry(struct bt_info *bt, struct syment *sym,
GET_STACK_DATA(current->sp, &pt_regs, SIZE(pt_regs));
mips64_dump_exception_stack(bt, pt_regs);
}
+
+ /* bt -f */
+ if (bt->flags & BT_FULL) {
+ fprintf(fp, " "
+ "[PC: %016lx RA: %016lx SP: %016lx SIZE: %ld]\n",
+ current->pc, current->ra, current->sp,
+ previous->sp - current->sp);
+ mips64_display_full_frame(bt, current, previous);
+ }
}
static void
@@ -692,6 +704,40 @@ mips64_is_exception_entry(struct syment *sym)
STREQ(sym->name, "handle_sys64");
}
+/*
+ * 'bt -f' commend output
+ * Display all stack data contained in a frame
+ */
+static void
+mips64_display_full_frame(struct bt_info *bt, struct mips64_unwind_frame *current,
+ struct mips64_unwind_frame *previous)
+{
+ int i, u_idx;
+ ulong *up;
+ ulong words, addr;
+ char buf[BUFSIZE];
+
+ if (previous->sp < current->sp)
+ return;
+
+ if (!(INSTACK(previous->sp, bt) && INSTACK(current->sp, bt)))
+ return;
+
+ words = (previous->sp - current->sp) / sizeof(ulong) + 1;
+ addr = current->sp;
+ u_idx = (current->sp - bt->stackbase) / sizeof(ulong);
+
+ for (i = 0; i < words; i++, u_idx++) {
+ if (!(i & 1))
+ fprintf(fp, "%s %lx: ", i ? "\n" : "", addr);
+
+ up = (ulong *)(&bt->stackbuf[u_idx*sizeof(ulong)]);
+ fprintf(fp, "%s ", format_stack_entry(bt, buf, *up, 0));
+ addr += sizeof(ulong);
+ }
+ fprintf(fp, "\n");
+}
+
static void
mips64_stackframe_init(void)
{
--
2.1.0