diff options
| author | Chuck Ebbert <76306.1226@compuserve.com> | 2006-01-11 16:46:03 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 22:05:00 -0500 |
| commit | 60923df35edab273d0bd8e829cdfdc5cfbb4fd2c (patch) | |
| tree | d4869124d1344f711671a33628e5eebb16ecd68c /arch/x86_64/kernel/ptrace.c | |
| parent | 100c0e36852a771864c56c31b260b7810b554170 (diff) | |
[PATCH] x86_64: allow setting RF in EFLAGS
Setting RF (resume flag) allows a debugger to resume execution after a code
breakpoint without tripping the breakpoint again. It is reset by the CPU
after executing one instruction.
Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/ptrace.c')
| -rw-r--r-- | arch/x86_64/kernel/ptrace.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86_64/kernel/ptrace.c b/arch/x86_64/kernel/ptrace.c index a87b6cebe80f..86248bc9303e 100644 --- a/arch/x86_64/kernel/ptrace.c +++ b/arch/x86_64/kernel/ptrace.c | |||
| @@ -36,9 +36,12 @@ | |||
| 36 | * in exit.c or in signal.c. | 36 | * in exit.c or in signal.c. |
| 37 | */ | 37 | */ |
| 38 | 38 | ||
| 39 | /* determines which flags the user has access to. */ | 39 | /* |
| 40 | /* 1 = access 0 = no access */ | 40 | * Determines which flags the user has access to [1 = access, 0 = no access]. |
| 41 | #define FLAG_MASK 0x44dd5UL | 41 | * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9). |
| 42 | * Also masks reserved bits (63-22, 15, 5, 3, 1). | ||
| 43 | */ | ||
| 44 | #define FLAG_MASK 0x54dd5UL | ||
| 42 | 45 | ||
| 43 | /* set's the trap flag. */ | 46 | /* set's the trap flag. */ |
| 44 | #define TRAP_FLAG 0x100UL | 47 | #define TRAP_FLAG 0x100UL |