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authorNamhyung Kim <namhyung@gmail.com>2010-10-28 02:34:04 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-28 05:03:12 +0400
commit0a3d763f1a68c97daae57e40c6d698986d1b38f4 (patch)
treeb88189bb89beadc12e414c27be08c26ad837dbbd /arch/um
parent8c0acac3676103113a2e259291a07c073ac07879 (diff)
downloadlinux-0a3d763f1a68c97daae57e40c6d698986d1b38f4.tar.xz
ptrace: cleanup arch_ptrace() on um
Remove unnecessary castings using void pointer and fix copy_to_user() return value. Also add missing __user markup on the argument of arch_ptrctl(). Signed-off-by: Namhyung Kim <namhyung@gmail.com> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/kernel/ptrace.c18
-rw-r--r--arch/um/sys-x86_64/ptrace.c7
2 files changed, 11 insertions, 14 deletions
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index 963d82bdec06..a5e33f29bbeb 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -47,6 +47,7 @@ long arch_ptrace(struct task_struct *child, long request,
{
int i, ret;
unsigned long __user *p = (void __user *)data;
+ void __user *vp = p;
switch (request) {
/* read word at location addr. */
@@ -108,24 +109,20 @@ long arch_ptrace(struct task_struct *child, long request,
#endif
#ifdef PTRACE_GETFPREGS
case PTRACE_GETFPREGS: /* Get the child FPU state. */
- ret = get_fpregs((struct user_i387_struct __user *) data,
- child);
+ ret = get_fpregs(vp, child);
break;
#endif
#ifdef PTRACE_SETFPREGS
case PTRACE_SETFPREGS: /* Set the child FPU state. */
- ret = set_fpregs((struct user_i387_struct __user *) data,
- child);
+ ret = set_fpregs(vp, child);
break;
#endif
case PTRACE_GET_THREAD_AREA:
- ret = ptrace_get_thread_area(child, addr,
- (struct user_desc __user *) data);
+ ret = ptrace_get_thread_area(child, addr, vp);
break;
case PTRACE_SET_THREAD_AREA:
- ret = ptrace_set_thread_area(child, addr,
- (struct user_desc __user *) data);
+ ret = ptrace_set_thread_area(child, addr, datavp);
break;
case PTRACE_FAULTINFO: {
@@ -135,7 +132,8 @@ long arch_ptrace(struct task_struct *child, long request,
* On i386, ptrace_faultinfo is smaller!
*/
ret = copy_to_user(p, &child->thread.arch.faultinfo,
- sizeof(struct ptrace_faultinfo));
+ sizeof(struct ptrace_faultinfo)) ?
+ -EIO : 0;
break;
}
@@ -159,7 +157,7 @@ long arch_ptrace(struct task_struct *child, long request,
#ifdef PTRACE_ARCH_PRCTL
case PTRACE_ARCH_PRCTL:
/* XXX Calls ptrace on the host - needs some SMP thinking */
- ret = arch_prctl(child, data, (void *) addr);
+ ret = arch_prctl(child, data, (void __user *) addr);
break;
#endif
default:
diff --git a/arch/um/sys-x86_64/ptrace.c b/arch/um/sys-x86_64/ptrace.c
index 67e63680df28..f43613643cdb 100644
--- a/arch/um/sys-x86_64/ptrace.c
+++ b/arch/um/sys-x86_64/ptrace.c
@@ -179,15 +179,14 @@ long subarch_ptrace(struct task_struct *child, long request,
unsigned long addr, unsigned long data)
{
int ret = -EIO;
+ void __user *datap = (void __user *) data;
switch (request) {
case PTRACE_GETFPXREGS: /* Get the child FPU state. */
- ret = get_fpregs((struct user_i387_struct __user *) data,
- child);
+ ret = get_fpregs(datap, child);
break;
case PTRACE_SETFPXREGS: /* Set the child FPU state. */
- ret = set_fpregs((struct user_i387_struct __user *) data,
- child);
+ ret = set_fpregs(datap, child);
break;
}