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authorChristoph Hellwig <hch@lst.de>2010-03-10 15:22:50 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-12 15:52:38 -0800
commit440e6ca79aebdc274ce4c625a6f42c8bf3c7bc91 (patch)
treeff3230d94decd47b67960134a54313706c10bfa5 /arch/arm/include
parentfd341abba65e3d93fc24c132e4c0278d18b6d2fc (diff)
arm: use generic ptrace_resume code
Use the generic ptrace_resume code for PTRACE_SYSCALL, PTRACE_CONT, PTRACE_KILL and PTRACE_SINGLESTEP. This implies defining arch_has_single_step in <asm/ptrace.h> and implementing the user_enable_single_step and user_disable_single_step functions, which also causes the breakpoint information to be cleared on fork, which could be considered a bug fix. Also the TIF_SYSCALL_TRACE thread flag is now cleared on PTRACE_KILL which it previously wasn't and the single stepping disable only happens if the tracee process isn't a zombie yet, which is consistent with all architectures using the modern ptrace code. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Roland McGrath <roland@redhat.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm/include')
-rw-r--r--arch/arm/include/asm/ptrace.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h
index eec6e897ceb..9dcb11e5902 100644
--- a/arch/arm/include/asm/ptrace.h
+++ b/arch/arm/include/asm/ptrace.h
@@ -128,6 +128,8 @@ struct pt_regs {
#ifdef __KERNEL__
+#define arch_has_single_step() (1)
+
#define user_mode(regs) \
(((regs)->ARM_cpsr & 0xf) == 0)