lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] remove lock prefix from is_at_popf() tests

Browse Source 
The lock prefix will cause an exception when used with the
popf instruction, so no need to continue searching after it's
found.

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Chuck Ebbert
2006-09-26 10:52:32 +02:00
committed by Andi Kleen
parent 145106e810
commit d4d35854a1
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86_64/kernel/ptrace.c
View File

@@ -138,7 +138,7 @@ static int is_at_popf(struct task_struct *child, struct pt_regs *regs)
case 0x26: case 0x2e: case 0x26: case 0x2e:
case 0x36: case 0x3e: case 0x36: case 0x3e:
case 0x64: case 0x65: case 0x64: case 0x65:
case 0xf0: case 0xf2: case 0xf3: case 0xf2: case 0xf3:
continue; continue;
case 0x40 ... 0x4f: case 0x40 ... 0x4f:
@@ -148,7 +148,7 @@ static int is_at_popf(struct task_struct *child, struct pt_regs *regs)
/* 64-bit mode: REX prefix */ /* 64-bit mode: REX prefix */
continue; continue;
/* CHECKME: f0, f2, f3 */ /* CHECKME: f2, f3 */
/* /*
* pushf: NOTE! We should probably not let * pushf: NOTE! We should probably not let