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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-25 18:18:04 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-25 18:18:04 -0700 |
| commit | 36e635cb21d96da0f30b91a39cc95ef4ed1bce26 (patch) | |
| tree | c28397756f579bbd23f1570ca612772c02cfbab2 /arch/x86/mm/extable.c | |
| parent | c265cc5c3cb2e950910437a846ef59e3a5c2df51 (diff) | |
| parent | 81c2949f7fdcf8ff681326669afde24962232670 (diff) | |
| download | linux-36e635cb21d96da0f30b91a39cc95ef4ed1bce26.tar.bz2 | |
Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 stackdump update from Ingo Molnar:
"A number of stackdump enhancements"
* 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/dumpstack: Add show_stack_regs() and use it
printk: Make the printk*once() variants return a value
x86/dumpstack: Honor supplied @regs arg
Diffstat (limited to 'arch/x86/mm/extable.c')
| -rw-r--r-- | arch/x86/mm/extable.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c index 0f90cc218d04..832b98f822be 100644 --- a/arch/x86/mm/extable.c +++ b/arch/x86/mm/extable.c @@ -1,6 +1,7 @@ #include <linux/module.h> #include <asm/uaccess.h> #include <asm/traps.h> +#include <asm/kdebug.h> typedef bool (*ex_handler_t)(const struct exception_table_entry *, struct pt_regs *, int); @@ -46,8 +47,9 @@ EXPORT_SYMBOL(ex_handler_ext); bool ex_handler_rdmsr_unsafe(const struct exception_table_entry *fixup, struct pt_regs *regs, int trapnr) { - WARN_ONCE(1, "unchecked MSR access error: RDMSR from 0x%x\n", - (unsigned int)regs->cx); + if (pr_warn_once("unchecked MSR access error: RDMSR from 0x%x at rIP: 0x%lx (%pF)\n", + (unsigned int)regs->cx, regs->ip, (void *)regs->ip)) + show_stack_regs(regs); /* Pretend that the read succeeded and returned 0. */ regs->ip = ex_fixup_addr(fixup); @@ -60,9 +62,10 @@ EXPORT_SYMBOL(ex_handler_rdmsr_unsafe); bool ex_handler_wrmsr_unsafe(const struct exception_table_entry *fixup, struct pt_regs *regs, int trapnr) { - WARN_ONCE(1, "unchecked MSR access error: WRMSR to 0x%x (tried to write 0x%08x%08x)\n", - (unsigned int)regs->cx, - (unsigned int)regs->dx, (unsigned int)regs->ax); + if (pr_warn_once("unchecked MSR access error: WRMSR to 0x%x (tried to write 0x%08x%08x) at rIP: 0x%lx (%pF)\n", + (unsigned int)regs->cx, (unsigned int)regs->dx, + (unsigned int)regs->ax, regs->ip, (void *)regs->ip)) + show_stack_regs(regs); /* Pretend that the write succeeded. */ regs->ip = ex_fixup_addr(fixup); |