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| author | Qing Zhang <zhangqing@loongson.cn> | 2022-08-06 11:10:04 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-08-12 08:10:11 +0300 |
| commit | 93a4fa622eb061f75f87f0cf9609ab4e69c67d01 (patch) | |
| tree | d49f5b01e8a2299424b31d9344101dc5b5a561d7 /arch/loongarch/include/asm/processor.h | |
| parent | 49aef111e2dae176a7708b532118f33f24289248 (diff) | |
| download | linux-93a4fa622eb061f75f87f0cf9609ab4e69c67d01.tar.xz | |
LoongArch: Add STACKTRACE support
1. Use common arch_stack_walk() infrastructure to avoid duplicated code
and avoid taking care of the stack storage and filtering.
2. Add sched_ra (means sched return address) and sched_cfa (means sched
call frame address) to thread_info, and store them in switch_to().
3. Add __get_wchan() implementation.
Now we can print the process stack and wait channel by cat /proc/*/stack
and /proc/*/wchan.
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include/asm/processor.h')
| -rw-r--r-- | arch/loongarch/include/asm/processor.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/processor.h b/arch/loongarch/include/asm/processor.h index 57ec45aa078e..1c4b4308378d 100644 --- a/arch/loongarch/include/asm/processor.h +++ b/arch/loongarch/include/asm/processor.h @@ -101,6 +101,10 @@ struct thread_struct { unsigned long reg23, reg24, reg25, reg26; /* s0-s3 */ unsigned long reg27, reg28, reg29, reg30, reg31; /* s4-s8 */ + /* __schedule() return address / call frame address */ + unsigned long sched_ra; + unsigned long sched_cfa; + /* CSR registers */ unsigned long csr_prmd; unsigned long csr_crmd; @@ -129,6 +133,9 @@ struct thread_struct { struct loongarch_fpu fpu FPU_ALIGN; }; +#define thread_saved_ra(tsk) (tsk->thread.sched_ra) +#define thread_saved_fp(tsk) (tsk->thread.sched_cfa) + #define INIT_THREAD { \ /* \ * Main processor registers \ @@ -145,6 +152,8 @@ struct thread_struct { .reg29 = 0, \ .reg30 = 0, \ .reg31 = 0, \ + .sched_ra = 0, \ + .sched_cfa = 0, \ .csr_crmd = 0, \ .csr_prmd = 0, \ .csr_euen = 0, \ |