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authorAl Viro <viro@ftp.linux.org.uk>2011-09-14 16:21:37 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-09-14 18:09:37 -0700
commitf2833aef6a0517e933992c8007f330d0df5d9317 (patch)
treeb1f664d138b897a5d3f28bfc5e242089a4435916 /arch/um/sys-x86_64
parent01599cdc2f891415387aed9921909b3e9f27c801 (diff)
um: clean arch_ptrace() up a bit
1) take subarch-specific stuff to subarch_ptrace() 2) PTRACE_{PEEK,POKE}{TEXT,DATA} is handled by ptrace_request() just fine... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/sys-x86_64')
-rw-r--r--arch/um/sys-x86_64/ptrace.c22
1 files changed, 19 insertions, 3 deletions
diff --git a/arch/um/sys-x86_64/ptrace.c b/arch/um/sys-x86_64/ptrace.c
index 7ed49ac78f88..4005506834fd 100644
--- a/arch/um/sys-x86_64/ptrace.c
+++ b/arch/um/sys-x86_64/ptrace.c
@@ -145,7 +145,7 @@ int is_syscall(unsigned long addr)
return instr == 0x050f;
}
-int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *child)
+static int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *child)
{
int err, n, cpu = ((struct thread_info *) child->stack)->cpu;
long fpregs[HOST_FP_SIZE];
@@ -162,7 +162,7 @@ int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *child)
return n;
}
-int set_fpregs(struct user_i387_struct __user *buf, struct task_struct *child)
+static int set_fpregs(struct user_i387_struct __user *buf, struct task_struct *child)
{
int n, cpu = ((struct thread_info *) child->stack)->cpu;
long fpregs[HOST_FP_SIZE];
@@ -178,5 +178,21 @@ int set_fpregs(struct user_i387_struct __user *buf, struct task_struct *child)
long subarch_ptrace(struct task_struct *child, long request,
unsigned long addr, unsigned long data)
{
- return -EIO;
+ int ret = -EIO;
+ void __user *datap = (void __user *) data;
+
+ switch (request) {
+ case PTRACE_GETFPREGS: /* Get the child FPU state. */
+ ret = get_fpregs(datap, child);
+ break;
+ case PTRACE_SETFPREGS: /* Set the child FPU state. */
+ ret = set_fpregs(datap, child);
+ break;
+ case PTRACE_ARCH_PRCTL:
+ /* XXX Calls ptrace on the host - needs some SMP thinking */
+ ret = arch_prctl(child, data, (void __user *) addr);
+ break;
+ }
+
+ return ret;
}