[Crash-utility] [PATCH] MIPS: support getting regs from kdump dumpfiles

[Rabin Vincent]

Add support for using the notes in MIPS' kdump compressed format
dumpfiles.
---
 diskdump.c |   19 +++++++++++++++----
 mips.c     |    4 ++++
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/diskdump.c b/diskdump.c
index 585aaa9..90f3bff 100644
--- a/diskdump.c
+++ b/diskdump.c
@@ -1285,14 +1285,11 @@ extern void get_netdump_regs_x86(struct bt_info *, ulong *, ulong *);
 extern void get_netdump_regs_x86_64(struct bt_info *, ulong *, ulong *);
 
 static void
-get_diskdump_regs_ppc(struct bt_info *bt, ulong *eip, ulong *esp)
+get_diskdump_regs_32(struct bt_info *bt, ulong *eip, ulong *esp)
 {
 	Elf32_Nhdr *note;
 	int len;
 
-	if (KDUMP_CMPRS_VALID())
-		ppc_relocate_nt_prstatus_percpu(dd->nt_prstatus_percpu,
-						&dd->num_prstatus_notes);
 	if (KDUMP_CMPRS_VALID() &&
 		(bt->task == tt->panic_task || 
 		(is_task_active(bt->task) && dd->num_prstatus_notes > 1))) {
@@ -1313,6 +1310,16 @@ get_diskdump_regs_ppc(struct bt_info *bt, ulong *eip, ulong *esp)
 }
 
 static void
+get_diskdump_regs_ppc(struct bt_info *bt, ulong *eip, ulong *esp)
+{
+	if (KDUMP_CMPRS_VALID())
+		ppc_relocate_nt_prstatus_percpu(dd->nt_prstatus_percpu,
+						&dd->num_prstatus_notes);
+
+	get_diskdump_regs_32(bt, eip, esp);
+}
+
+static void
 get_diskdump_regs_ppc64(struct bt_info *bt, ulong *eip, ulong *esp)
 {
 	if ((bt->task == tt->panic_task) && DISKDUMP_VALID())
@@ -1346,6 +1353,10 @@ get_diskdump_regs(struct bt_info *bt, ulong *eip, ulong *esp)
 		get_diskdump_regs_arm(bt, eip, esp);
 		break;
 
+	case EM_MIPS:
+		return get_diskdump_regs_32(bt, eip, esp);
+		break;
+
 	case EM_386:
 		return get_netdump_regs_x86(bt, eip, esp);
 		break;
diff --git a/mips.c b/mips.c
index 77077fb..4b62d1e 100644
--- a/mips.c
+++ b/mips.c
@@ -833,6 +833,10 @@ mips_init(int when)
 #endif
 
 	switch (when) {
+	case SETUP_ENV:
+		machdep->process_elf_notes = process_elf32_notes;
+		break;
+
 	case PRE_SYMTAB:
 		machdep->verify_symbol = mips_verify_symbol;
 		machdep->machspec = &mips_machine_specific;
-- 
1.7.10.4