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ptrace: generic PTRACE_SINGLEBLOCK

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This makes ptrace_request handle PTRACE_SINGLEBLOCK along with
PTRACE_CONT et al.  The new generic code makes use of the
arch_has_block_step macro and generic entry points on machines
that define them.

[ [email protected]: bugfix ]

Signed-off-by: Roland McGrath <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Roland McGrath 2008-01-30 13:30:53 +01:00 • committed by Ingo Molnar
commit 5b88abbf77
2 changed files with 15 additions and 2 deletions
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15
kernel/ptrace.c
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@ -373,6 +373,12 @@ static int ptrace_setsiginfo(struct task_struct *child, siginfo_t __user * data)
#define is_singlestep(request) 0
#endif
#ifdef PTRACE_SINGLEBLOCK
#define is_singleblock(request) ((request) == PTRACE_SINGLEBLOCK)
#else
#define is_singleblock(request) 0
#endif
#ifdef PTRACE_SYSEMU
#define is_sysemu_singlestep(request) ((request) == PTRACE_SYSEMU_SINGLESTEP)
#else
@ -396,7 +402,11 @@ static int ptrace_resume(struct task_struct *child, long request, long data)
clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
#endif
if (is_singlestep(request) || is_sysemu_singlestep(request)) {
if (is_singleblock(request)) {
if (unlikely(!arch_has_block_step()))
return -EIO;
user_enable_block_step(child);
} else if (is_singlestep(request) || is_sysemu_singlestep(request)) {
if (unlikely(!arch_has_single_step()))
return -EIO;
user_enable_single_step(child);
@ -438,6 +448,9 @@ int ptrace_request(struct task_struct *child, long request,
#ifdef PTRACE_SINGLESTEP
case PTRACE_SINGLESTEP:
#endif
#ifdef PTRACE_SINGLEBLOCK
case PTRACE_SINGLEBLOCK:
#endif
#ifdef PTRACE_SYSEMU
case PTRACE_SYSEMU:
case PTRACE_SYSEMU_SINGLESTEP: