summaryrefslogtreecommitdiff
path: root/arch/mips/kernel/process.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/kernel/process.c')
-rw-r--r--arch/mips/kernel/process.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index e7b0b385fb2b..b160ea30de0f 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -311,12 +311,19 @@ static inline int is_sp_move_ins(union mips_instruction *ip)
static int get_frame_info(struct mips_frame_info *info)
{
union mips_instruction *ip = info->func;
- int i, max_insns =
- min(128UL, info->func_size / sizeof(union mips_instruction));
+ unsigned max_insns = info->func_size / sizeof(union mips_instruction);
+ unsigned i;
info->pc_offset = -1;
info->frame_size = 0;
+ if (!ip)
+ goto err;
+
+ if (max_insns == 0)
+ max_insns = 128U; /* unknown function size */
+ max_insns = min(128U, max_insns);
+
for (i = 0; i < max_insns; i++, ip++) {
if (is_jal_jalr_jr_ins(ip))
@@ -337,6 +344,7 @@ static int get_frame_info(struct mips_frame_info *info)
if (info->pc_offset < 0) /* leaf */
return 1;
/* prologue seems boggus... */
+err:
return -1;
}