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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-01-05 09:50:07 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-01-05 09:50:07 -0800 |
commit | 9ee3b3f4a5eb523ef27675ac2fcd2269b9d68767 (patch) | |
tree | bd99b23002b5c34c1977c727bae7f1882171be57 /arch/csky/kernel/dumpstack.c | |
parent | Merge branch 'akpm' (patches from Andrew) (diff) | |
parent | csky: Add perf support for C-SKY (diff) | |
download | linux-dev-9ee3b3f4a5eb523ef27675ac2fcd2269b9d68767.tar.xz linux-dev-9ee3b3f4a5eb523ef27675ac2fcd2269b9d68767.zip |
Merge tag 'csky-for-linus-4.21' of git://github.com/c-sky/csky-linux
Pull arch/csky updates from Guo Ren:
"Here are three main features (cpu_hotplug, basic ftrace, basic perf)
and some bugfixes:
Features:
- Add CPU-hotplug support for SMP
- Add ftrace with function trace and function graph trace
- Add Perf support
- Add EM_CSKY_OLD 39
- optimize kernel panic print.
- remove syscall_exit_work
Bugfixes:
- fix abiv2 mmap(... O_SYNC) failure
- fix gdb coredump error
- remove vdsp implement for kernel
- fix qemu failure to bootup sometimes
- fix ftrace call-graph panic
- fix device tree node reference leak
- remove meaningless header-y
- fix save hi,lo,dspcr regs in switch_stack
- remove unused members in processor.h"
* tag 'csky-for-linus-4.21' of git://github.com/c-sky/csky-linux:
csky: Add perf support for C-SKY
csky: Add EM_CSKY_OLD 39
clocksource/drivers/c-sky: fixup ftrace call-graph panic
csky: ftrace call graph supported.
csky: basic ftrace supported
csky: remove unused members in processor.h
csky: optimize kernel panic print.
csky: stacktrace supported.
csky: CPU-hotplug supported for SMP
clocksource/drivers/c-sky: fixup qemu fail to bootup sometimes.
csky: fixup save hi,lo,dspcr regs in switch_stack.
csky: remove syscall_exit_work
csky: fixup remove vdsp implement for kernel.
csky: bugfix gdb coredump error.
csky: fixup abiv2 mmap(... O_SYNC) failed.
csky: define syscall_get_arch()
elf-em.h: add EM_CSKY
csky: remove meaningless header-y
csky: Don't leak device tree node reference
Diffstat (limited to 'arch/csky/kernel/dumpstack.c')
-rw-r--r-- | arch/csky/kernel/dumpstack.c | 59 |
1 files changed, 19 insertions, 40 deletions
diff --git a/arch/csky/kernel/dumpstack.c b/arch/csky/kernel/dumpstack.c index a9a03ac57ec5..659253e9989c 100644 --- a/arch/csky/kernel/dumpstack.c +++ b/arch/csky/kernel/dumpstack.c @@ -7,60 +7,39 @@ int kstack_depth_to_print = 48; void show_trace(unsigned long *stack) { - unsigned long *endstack; + unsigned long *stack_end; + unsigned long *stack_start; + unsigned long *fp; unsigned long addr; - int i; - pr_info("Call Trace:\n"); - addr = (unsigned long)stack + THREAD_SIZE - 1; - endstack = (unsigned long *)(addr & -THREAD_SIZE); - i = 0; - while (stack + 1 <= endstack) { - addr = *stack++; - /* - * If the address is either in the text segment of the - * kernel, or in the region which contains vmalloc'ed - * memory, it *may* be the address of a calling - * routine; if so, print it so that someone tracing - * down the cause of the crash will be able to figure - * out the call path that was taken. - */ - if (__kernel_text_address(addr)) { -#ifndef CONFIG_KALLSYMS - if (i % 5 == 0) - pr_cont("\n "); + addr = (unsigned long) stack & THREAD_MASK; + stack_start = (unsigned long *) addr; + stack_end = (unsigned long *) (addr + THREAD_SIZE); + + fp = stack; + pr_info("\nCall Trace:"); + + while (fp > stack_start && fp < stack_end) { +#ifdef CONFIG_STACKTRACE + addr = fp[1]; + fp = (unsigned long *) fp[0]; +#else + addr = *fp++; #endif - pr_cont(" [<%08lx>] %pS\n", addr, (void *)addr); - i++; - } + if (__kernel_text_address(addr)) + pr_cont("\n[<%08lx>] %pS", addr, (void *)addr); } pr_cont("\n"); } void show_stack(struct task_struct *task, unsigned long *stack) { - unsigned long *p; - unsigned long *endstack; - int i; - if (!stack) { if (task) - stack = (unsigned long *)task->thread.esp0; + stack = (unsigned long *)thread_saved_fp(task); else stack = (unsigned long *)&stack; } - endstack = (unsigned long *) - (((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE); - pr_info("Stack from %08lx:", (unsigned long)stack); - p = stack; - for (i = 0; i < kstack_depth_to_print; i++) { - if (p + 1 > endstack) - break; - if (i % 8 == 0) - pr_cont("\n "); - pr_cont(" %08lx", *p++); - } - pr_cont("\n"); show_trace(stack); } |