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@@ -94,6 +94,7 @@ asmlinkage void spurious_interrupt_bug(void);
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asmlinkage void machine_check(void);
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int kstack_depth_to_print = 24;
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+static unsigned int code_bytes = 64;
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ATOMIC_NOTIFIER_HEAD(i386die_chain);
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int register_die_notifier(struct notifier_block *nb)
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@@ -325,7 +326,8 @@ void show_registers(struct pt_regs *regs)
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*/
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if (in_kernel) {
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u8 *eip;
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- int code_bytes = 64;
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+ unsigned int code_prologue = code_bytes * 43 / 64;
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+ unsigned int code_len = code_bytes;
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unsigned char c;
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printk("\n" KERN_EMERG "Stack: ");
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@@ -333,14 +335,14 @@ void show_registers(struct pt_regs *regs)
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printk(KERN_EMERG "Code: ");
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- eip = (u8 *)regs->eip - 43;
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+ eip = (u8 *)regs->eip - code_prologue;
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if (eip < (u8 *)PAGE_OFFSET ||
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probe_kernel_address(eip, c)) {
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/* try starting at EIP */
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eip = (u8 *)regs->eip;
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- code_bytes = 32;
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+ code_len = code_len - code_prologue + 1;
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}
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- for (i = 0; i < code_bytes; i++, eip++) {
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+ for (i = 0; i < code_len; i++, eip++) {
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if (eip < (u8 *)PAGE_OFFSET ||
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probe_kernel_address(eip, c)) {
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printk(" Bad EIP value.");
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@@ -1192,3 +1194,13 @@ static int __init kstack_setup(char *s)
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return 1;
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}
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__setup("kstack=", kstack_setup);
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+
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+static int __init code_bytes_setup(char *s)
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+{
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+ code_bytes = simple_strtoul(s, NULL, 0);
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+ if (code_bytes > 8192)
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+ code_bytes = 8192;
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+
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+ return 1;
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+}
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+__setup("code_bytes=", code_bytes_setup);
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