diff options
| -rw-r--r-- | arch/x86/include/asm/stacktrace.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/dumpstack.c | 49 | ||||
| -rw-r--r-- | arch/x86/kernel/dumpstack_32.c | 42 | ||||
| -rw-r--r-- | arch/x86/kernel/dumpstack_64.c | 42 |
4 files changed, 48 insertions, 87 deletions
diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h index f73706878772..133d9425fced 100644 --- a/arch/x86/include/asm/stacktrace.h +++ b/arch/x86/include/asm/stacktrace.h @@ -87,8 +87,6 @@ get_stack_pointer(struct task_struct *task, struct pt_regs *regs) void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs, unsigned long *stack, char *log_lvl); -extern unsigned int code_bytes; - /* The form of the top of the frame on the stack */ struct stack_frame { struct stack_frame *next_frame; diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c index a2d8a3908670..18fa9d74c182 100644 --- a/arch/x86/kernel/dumpstack.c +++ b/arch/x86/kernel/dumpstack.c @@ -24,7 +24,7 @@ int panic_on_unrecovered_nmi; int panic_on_io_nmi; -unsigned int code_bytes = 64; +static unsigned int code_bytes = 64; static int die_counter; bool in_task_stack(unsigned long *stack, struct task_struct *task, @@ -375,3 +375,50 @@ static int __init code_bytes_setup(char *s) return 1; } __setup("code_bytes=", code_bytes_setup); + +void show_regs(struct pt_regs *regs) +{ + bool all = true; + int i; + + show_regs_print_info(KERN_DEFAULT); + + if (IS_ENABLED(CONFIG_X86_32)) + all = !user_mode(regs); + + __show_regs(regs, all); + + /* + * When in-kernel, we also print out the stack and code at the + * time of the fault.. + */ + if (!user_mode(regs)) { + unsigned int code_prologue = code_bytes * 43 / 64; + unsigned int code_len = code_bytes; + unsigned char c; + u8 *ip; + + show_trace_log_lvl(current, regs, NULL, KERN_DEFAULT); + + printk(KERN_DEFAULT "Code: "); + + ip = (u8 *)regs->ip - code_prologue; + if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) { + /* try starting at IP */ + ip = (u8 *)regs->ip; + code_len = code_len - code_prologue + 1; + } + for (i = 0; i < code_len; i++, ip++) { + if (ip < (u8 *)PAGE_OFFSET || + probe_kernel_address(ip, c)) { + pr_cont(" Bad RIP value."); + break; + } + if (ip == (u8 *)regs->ip) + pr_cont("<%02x> ", c); + else + pr_cont("%02x ", c); + } + } + pr_cont("\n"); +} diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c index 04170f63e3a1..cd53f3030e40 100644 --- a/arch/x86/kernel/dumpstack_32.c +++ b/arch/x86/kernel/dumpstack_32.c @@ -127,45 +127,3 @@ unknown: info->type = STACK_TYPE_UNKNOWN; return -EINVAL; } - -void show_regs(struct pt_regs *regs) -{ - int i; - - show_regs_print_info(KERN_EMERG); - __show_regs(regs, !user_mode(regs)); - - /* - * When in-kernel, we also print out the stack and code at the - * time of the fault.. - */ - if (!user_mode(regs)) { - unsigned int code_prologue = code_bytes * 43 / 64; - unsigned int code_len = code_bytes; - unsigned char c; - u8 *ip; - - show_trace_log_lvl(current, regs, NULL, KERN_EMERG); - - pr_emerg("Code:"); - - ip = (u8 *)regs->ip - code_prologue; - if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) { - /* try starting at IP */ - ip = (u8 *)regs->ip; - code_len = code_len - code_prologue + 1; - } - for (i = 0; i < code_len; i++, ip++) { - if (ip < (u8 *)PAGE_OFFSET || - probe_kernel_address(ip, c)) { - pr_cont(" Bad EIP value."); - break; - } - if (ip == (u8 *)regs->ip) - pr_cont(" <%02x>", c); - else - pr_cont(" %02x", c); - } - } - pr_cont("\n"); -} diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c index 563e28d14f2c..5cdb9e84da57 100644 --- a/arch/x86/kernel/dumpstack_64.c +++ b/arch/x86/kernel/dumpstack_64.c @@ -149,45 +149,3 @@ unknown: info->type = STACK_TYPE_UNKNOWN; return -EINVAL; } - -void show_regs(struct pt_regs *regs) -{ - int i; - - show_regs_print_info(KERN_DEFAULT); - __show_regs(regs, 1); - - /* - * When in-kernel, we also print out the stack and code at the - * time of the fault.. - */ - if (!user_mode(regs)) { - unsigned int code_prologue = code_bytes * 43 / 64; - unsigned int code_len = code_bytes; - unsigned char c; - u8 *ip; - - show_trace_log_lvl(current, regs, NULL, KERN_DEFAULT); - - printk(KERN_DEFAULT "Code: "); - - ip = (u8 *)regs->ip - code_prologue; - if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) { - /* try starting at IP */ - ip = (u8 *)regs->ip; - code_len = code_len - code_prologue + 1; - } - for (i = 0; i < code_len; i++, ip++) { - if (ip < (u8 *)PAGE_OFFSET || - probe_kernel_address(ip, c)) { - pr_cont(" Bad RIP value."); - break; - } - if (ip == (u8 *)regs->ip) - pr_cont("<%02x> ", c); - else - pr_cont("%02x ", c); - } - } - pr_cont("\n"); -} |