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arm64: rename dump_instr as dump_kernel_instr

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In traps.c, only __die calls dump_instr.
However, this function has sub-function as __dump_instr.

dump_kernel_instr can replace those functions.
By using aarch64_insn_read, it does not have to change fs to KERNEL_DS.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: jinho lim <jordan.lim@samsung.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
jinho lim 2019-06-26 20:50:13 +09:00 committed by Catalin Marinas
parent d9db691d3c
commit 7b71665603
1 changed files with 7 additions and 16 deletions
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23
arch/arm64/kernel/traps.c
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@ -66,16 +66,19 @@ static void dump_backtrace_entry(unsigned long where)
printk(" %pS\n", (void *)where); printk(" %pS\n", (void *)where);
} }
static void __dump_instr(const char *lvl, struct pt_regs *regs) static void dump_kernel_instr(const char *lvl, struct pt_regs *regs)
{ {
unsigned long addr = instruction_pointer(regs); unsigned long addr = instruction_pointer(regs);
char str[sizeof("00000000 ") * 5 + 2 + 1], *p = str; char str[sizeof("00000000 ") * 5 + 2 + 1], *p = str;
int i; int i;
if (user_mode(regs))
return;
for (i = -4; i < 1; i++) { for (i = -4; i < 1; i++) {
unsigned int val, bad; unsigned int val, bad;
bad = get_user(val, &((u32 *)addr)[i]); bad = aarch64_insn_read(&((u32 *)addr)[i], &val);
if (!bad) if (!bad)
p += sprintf(p, i == 0 ? "(%08x) " : "%08x ", val); p += sprintf(p, i == 0 ? "(%08x) " : "%08x ", val);
@ -84,19 +87,8 @@ static void __dump_instr(const char *lvl, struct pt_regs *regs)
break; break;
} }
} }
printk("%sCode: %s\n", lvl, str);
}
static void dump_instr(const char *lvl, struct pt_regs *regs) printk("%sCode: %s\n", lvl, str);
{
if (!user_mode(regs)) {
mm_segment_t fs = get_fs();
set_fs(KERNEL_DS);
__dump_instr(lvl, regs);
set_fs(fs);
} else {
__dump_instr(lvl, regs);
}
} }
void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk) void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
@ -182,8 +174,7 @@ static int __die(const char *str, int err, struct pt_regs *regs)
print_modules(); print_modules();
show_regs(regs); show_regs(regs);
if (!user_mode(regs)) dump_kernel_instr(KERN_EMERG, regs);
dump_instr(KERN_EMERG, regs);
return ret; return ret;
} }