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Helper for si_code event extraction.

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Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Pavel Emelyanov 2012-04-25 21:34:05 +04:00
parent b749f4b1c3
commit 59a2f13e7e
3 changed files with 5 additions and 3 deletions
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2
include/ptrace.h
View file

@ -32,6 +32,8 @@
#define PTRACE_O_TRACEVFORKDONE 0x00000020
#define PTRACE_O_TRACEEXIT 0x00000040
#define SI_EVENT(_si_code) (((_si_code) & 0xFFFF) >> 8)
extern int seize_task(pid_t pid, pid_t ppid, pid_t *pgid, pid_t *sid);
extern int unseize_task(pid_t pid, int state);
extern int ptrace_peek_area(pid_t pid, void *dst, void *addr, long bytes);

4
parasite-syscall.c
View file

@ -171,7 +171,7 @@ retry_signal:
goto err;
}
if (((siginfo.si_code & 0xffff) >> 8) != PTRACE_EVENT_STOP)
if (SI_EVENT(siginfo.si_code) != PTRACE_EVENT_STOP)
goto retry_signal;
/*
@ -218,7 +218,7 @@ retry_signal:
goto err;
}
if (((siginfo.si_code & 0xffff) >> 8) != PTRACE_EVENT_STOP) {
if (SI_EVENT(siginfo.si_code) != PTRACE_EVENT_STOP) {
pr_err("si_code doesn't match (pid: %d si_code: %d)\n",
pid, siginfo.si_code);
goto err;

2
ptrace.c
View file

@ -113,7 +113,7 @@ try_again:
goto err;
}
if (((si.si_code & 0xffff)>> 8) != PTRACE_EVENT_STOP) {
if (SI_EVENT(si.si_code) != PTRACE_EVENT_STOP) {
/*
* Kernel notifies us about the task being seized received some
* event other than the STOP, i.e. -- a signal. Let the task