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| author | Lennert Buytenhek <buytenh@wantstofly.org> | 2006-06-27 22:56:19 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-06-28 17:55:00 +0100 |
| commit | 5429b060df6d556f396b78364ad017686015bc34 (patch) | |
| tree | 48b088aa6eb65e856df91e296447f6a7ea394644 | |
| parent | 3bec6ded282b331552587267d67a06ed7fd95ddd (diff) | |
| download | blackbird-op-linux-5429b060df6d556f396b78364ad017686015bc34.tar.gz blackbird-op-linux-5429b060df6d556f396b78364ad017686015bc34.zip | |
[ARM] 3665/1: crunch: add ptrace support
Patch from Lennert Buytenhek
This patch makes it possible to get/set a task's Crunch state via
the ptrace(2) system call.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/kernel/ptrace.c | 36 | ||||
| -rw-r--r-- | include/asm-arm/ptrace.h | 5 |
2 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c index a1d1b2906e8d..c40bdc770054 100644 --- a/arch/arm/kernel/ptrace.c +++ b/arch/arm/kernel/ptrace.c @@ -634,6 +634,32 @@ static int ptrace_setwmmxregs(struct task_struct *tsk, void __user *ufp) #endif +#ifdef CONFIG_CRUNCH +/* + * Get the child Crunch state. + */ +static int ptrace_getcrunchregs(struct task_struct *tsk, void __user *ufp) +{ + struct thread_info *thread = task_thread_info(tsk); + + crunch_task_disable(thread); /* force it to ram */ + return copy_to_user(ufp, &thread->crunchstate, CRUNCH_SIZE) + ? -EFAULT : 0; +} + +/* + * Set the child Crunch state. + */ +static int ptrace_setcrunchregs(struct task_struct *tsk, void __user *ufp) +{ + struct thread_info *thread = task_thread_info(tsk); + + crunch_task_release(thread); /* force a reload */ + return copy_from_user(&thread->crunchstate, ufp, CRUNCH_SIZE) + ? -EFAULT : 0; +} +#endif + long arch_ptrace(struct task_struct *child, long request, long addr, long data) { unsigned long tmp; @@ -765,6 +791,16 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) child->ptrace_message = data; break; +#ifdef CONFIG_CRUNCH + case PTRACE_GETCRUNCHREGS: + ret = ptrace_getcrunchregs(child, (void __user *)data); + break; + + case PTRACE_SETCRUNCHREGS: + ret = ptrace_setcrunchregs(child, (void __user *)data); + break; +#endif + default: ret = ptrace_request(child, request, addr, data); break; diff --git a/include/asm-arm/ptrace.h b/include/asm-arm/ptrace.h index 2bebe3dc0a30..5a8ef787dbf8 100644 --- a/include/asm-arm/ptrace.h +++ b/include/asm-arm/ptrace.h @@ -25,6 +25,11 @@ #define PTRACE_SET_SYSCALL 23 +/* PTRACE_SYSCALL is 24 */ + +#define PTRACE_GETCRUNCHREGS 25 +#define PTRACE_SETCRUNCHREGS 26 + /* * PSR bits */ |
