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authorChristoph Hellwig <hch@lst.de>2010-03-10 15:23:00 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-12 15:52:39 -0800
commit290ba3aef58ff21c977585ff6b687e457f80bf54 (patch)
treeefce6dc709b93798f588e0825602a6cc3b73786d /arch/cris/include
parent8313809ef3bfa8fa366d416add2150787235f192 (diff)
downloadlinux-2.6.38-lt-ux500-290ba3aef58ff21c977585ff6b687e457f80bf54.tar.gz
cris arch-v32: 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 which is consistent with all architectures using the modern ptrace code. The way breakpoints are disabled is entirely inconsistent currently, I tried to make some sense of it, but I suspect all of the content of ptrace_disable should be moved into user_disable_single_step, this defintively needs some revisting as the current patch changes behaviour in not quite designed ways. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Roland McGrath <roland@redhat.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/cris/include')
-rw-r--r--arch/cris/include/arch-v32/arch/ptrace.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/cris/include/arch-v32/arch/ptrace.h b/arch/cris/include/arch-v32/arch/ptrace.h
index 41f4e8662bc..ffca8d0f2e1 100644
--- a/arch/cris/include/arch-v32/arch/ptrace.h
+++ b/arch/cris/include/arch-v32/arch/ptrace.h
@@ -108,6 +108,7 @@ struct switch_stack {
#ifdef __KERNEL__
+#define arch_has_single_step() (1)
#define user_mode(regs) (((regs)->ccs & (1 << (U_CCS_BITNR + CCS_SHIFT))) != 0)
#define instruction_pointer(regs) ((regs)->erp)
extern void show_regs(struct pt_regs *);