diff options
author | Helge Deller <deller@gmx.de> | 2018-08-17 17:00:08 +0200 |
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committer | Helge Deller <deller@gmx.de> | 2018-08-17 17:00:08 +0200 |
commit | 9e0d5c451f9e559dd06af3fff49a0d2068c634c4 (patch) | |
tree | 1293c908104370c76548f0695297b0277835e1ec /arch | |
parent | 54c770da992387abfa7df4817404d000ef034fa8 (diff) | |
download | linux-9e0d5c451f9e559dd06af3fff49a0d2068c634c4.tar.bz2 |
parisc: Consolidate unwind initialization calls
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/parisc/include/asm/unwind.h | 6 | ||||
-rw-r--r-- | arch/parisc/kernel/stacktrace.c | 15 | ||||
-rw-r--r-- | arch/parisc/kernel/traps.c | 35 | ||||
-rw-r--r-- | arch/parisc/kernel/unwind.c | 37 |
4 files changed, 36 insertions, 57 deletions
diff --git a/arch/parisc/include/asm/unwind.h b/arch/parisc/include/asm/unwind.h index f133b7efbebb..9547e5261a8b 100644 --- a/arch/parisc/include/asm/unwind.h +++ b/arch/parisc/include/asm/unwind.h @@ -73,8 +73,10 @@ unwind_table_remove(struct unwind_table *table); void unwind_frame_init(struct unwind_frame_info *info, struct task_struct *t, struct pt_regs *regs); -void unwind_frame_init_from_blocked_task(struct unwind_frame_info *info, struct task_struct *t); -void unwind_frame_init_running(struct unwind_frame_info *info, struct pt_regs *regs); +void unwind_frame_init_from_blocked_task(struct unwind_frame_info *info, + struct task_struct *t); +void unwind_frame_init_task(struct unwind_frame_info *info, + struct task_struct *task, struct pt_regs *regs); int unwind_once(struct unwind_frame_info *info); int unwind_to_user(struct unwind_frame_info *info); diff --git a/arch/parisc/kernel/stacktrace.c b/arch/parisc/kernel/stacktrace.c index 2fe914c5f533..ec5835e83a7a 100644 --- a/arch/parisc/kernel/stacktrace.c +++ b/arch/parisc/kernel/stacktrace.c @@ -16,20 +16,7 @@ static void dump_trace(struct task_struct *task, struct stack_trace *trace) { struct unwind_frame_info info; - /* initialize unwind info */ - if (task == current) { - unsigned long sp; - struct pt_regs r; -HERE: - asm volatile ("copy %%r30, %0" : "=r"(sp)); - memset(&r, 0, sizeof(struct pt_regs)); - r.iaoq[0] = (unsigned long)&&HERE; - r.gr[2] = (unsigned long)__builtin_return_address(0); - r.gr[30] = sp; - unwind_frame_init(&info, task, &r); - } else { - unwind_frame_init_from_blocked_task(&info, task); - } + unwind_frame_init_task(&info, task, NULL); /* unwind stack and save entries in stack_trace struct */ trace->nr_entries = 0; diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c index 9372a41c8812..68f10f87073d 100644 --- a/arch/parisc/kernel/traps.c +++ b/arch/parisc/kernel/traps.c @@ -45,7 +45,7 @@ #include "../math-emu/math-emu.h" /* for handle_fpe() */ -static void parisc_show_stack(struct task_struct *task, unsigned long *sp, +static void parisc_show_stack(struct task_struct *task, struct pt_regs *regs); static int printbinary(char *buf, unsigned long x, int nbits) @@ -152,7 +152,7 @@ void show_regs(struct pt_regs *regs) printk("%s IAOQ[1]: %pS\n", level, (void *) regs->iaoq[1]); printk("%s RP(r2): %pS\n", level, (void *) regs->gr[2]); - parisc_show_stack(current, NULL, regs); + parisc_show_stack(current, regs); } } @@ -185,44 +185,19 @@ static void do_show_stack(struct unwind_frame_info *info) printk(KERN_CRIT "\n"); } -static void parisc_show_stack(struct task_struct *task, unsigned long *sp, +static void parisc_show_stack(struct task_struct *task, struct pt_regs *regs) { struct unwind_frame_info info; - struct task_struct *t; - t = task ? task : current; - if (regs) { - unwind_frame_init(&info, t, regs); - goto show_stack; - } - - if (t == current) { - unsigned long sp; - -HERE: - asm volatile ("copy %%r30, %0" : "=r"(sp)); - { - struct pt_regs r; - - memset(&r, 0, sizeof(struct pt_regs)); - r.iaoq[0] = (unsigned long)&&HERE; - r.gr[2] = (unsigned long)__builtin_return_address(0); - r.gr[30] = sp; - - unwind_frame_init(&info, current, &r); - } - } else { - unwind_frame_init_from_blocked_task(&info, t); - } + unwind_frame_init_task(&info, task, regs); -show_stack: do_show_stack(&info); } void show_stack(struct task_struct *t, unsigned long *sp) { - return parisc_show_stack(t, sp, NULL); + parisc_show_stack(t, NULL); } int is_valid_bugaddr(unsigned long iaoq) diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c index 5cdf13069dd9..5578a325a730 100644 --- a/arch/parisc/kernel/unwind.c +++ b/arch/parisc/kernel/unwind.c @@ -403,9 +403,31 @@ void unwind_frame_init_from_blocked_task(struct unwind_frame_info *info, struct kfree(r2); } -void unwind_frame_init_running(struct unwind_frame_info *info, struct pt_regs *regs) +#define get_parisc_stackpointer() ({ \ + unsigned long sp; \ + __asm__("copy %%r30, %0" : "=r"(sp)); \ + (sp); \ +}) + +void unwind_frame_init_task(struct unwind_frame_info *info, + struct task_struct *task, struct pt_regs *regs) { - unwind_frame_init(info, current, regs); + task = task ? task : current; + + if (task == current) { + struct pt_regs r; + + if (!regs) { + memset(&r, 0, sizeof(r)); + r.iaoq[0] = _THIS_IP_; + r.gr[2] = _RET_IP_; + r.gr[30] = get_parisc_stackpointer(); + regs = &r; + } + unwind_frame_init(info, task, &r); + } else { + unwind_frame_init_from_blocked_task(info, task); + } } int unwind_once(struct unwind_frame_info *next_frame) @@ -442,19 +464,12 @@ int unwind_to_user(struct unwind_frame_info *info) unsigned long return_address(unsigned int level) { struct unwind_frame_info info; - struct pt_regs r; - unsigned long sp; /* initialize unwind info */ - asm volatile ("copy %%r30, %0" : "=r"(sp)); - memset(&r, 0, sizeof(struct pt_regs)); - r.iaoq[0] = _THIS_IP_; - r.gr[2] = _RET_IP_; - r.gr[30] = sp; - unwind_frame_init(&info, current, &r); + unwind_frame_init_task(&info, current, NULL); /* unwind stack */ - ++level; + level += 2; do { if (unwind_once(&info) < 0 || info.ip == 0) return 0; |