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Diffstat (limited to 'arch/sparc64/kernel/ptrace.c')
-rw-r--r--arch/sparc64/kernel/ptrace.c202
1 files changed, 171 insertions, 31 deletions
diff --git a/arch/sparc64/kernel/ptrace.c b/arch/sparc64/kernel/ptrace.c
index aaae865e7932..e9fc0aa2da38 100644
--- a/arch/sparc64/kernel/ptrace.c
+++ b/arch/sparc64/kernel/ptrace.c
@@ -114,6 +114,85 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
preempt_enable();
}
+static int get_from_target(struct task_struct *target, unsigned long uaddr,
+ void *kbuf, int len)
+{
+ if (target == current) {
+ if (copy_from_user(kbuf, (void __user *) uaddr, len))
+ return -EFAULT;
+ } else {
+ int len2 = access_process_vm(target, uaddr, kbuf, len, 0);
+ if (len2 != len)
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static int set_to_target(struct task_struct *target, unsigned long uaddr,
+ void *kbuf, int len)
+{
+ if (target == current) {
+ if (copy_to_user((void __user *) uaddr, kbuf, len))
+ return -EFAULT;
+ } else {
+ int len2 = access_process_vm(target, uaddr, kbuf, len, 1);
+ if (len2 != len)
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static int regwindow64_get(struct task_struct *target,
+ const struct pt_regs *regs,
+ struct reg_window *wbuf)
+{
+ unsigned long rw_addr = regs->u_regs[UREG_I6];
+
+ if (test_tsk_thread_flag(current, TIF_32BIT)) {
+ struct reg_window32 win32;
+ int i;
+
+ if (get_from_target(target, rw_addr, &win32, sizeof(win32)))
+ return -EFAULT;
+ for (i = 0; i < 8; i++)
+ wbuf->locals[i] = win32.locals[i];
+ for (i = 0; i < 8; i++)
+ wbuf->ins[i] = win32.ins[i];
+ } else {
+ rw_addr += STACK_BIAS;
+ if (get_from_target(target, rw_addr, wbuf, sizeof(*wbuf)))
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int regwindow64_set(struct task_struct *target,
+ const struct pt_regs *regs,
+ struct reg_window *wbuf)
+{
+ unsigned long rw_addr = regs->u_regs[UREG_I6];
+
+ if (test_tsk_thread_flag(current, TIF_32BIT)) {
+ struct reg_window32 win32;
+ int i;
+
+ for (i = 0; i < 8; i++)
+ win32.locals[i] = wbuf->locals[i];
+ for (i = 0; i < 8; i++)
+ win32.ins[i] = wbuf->ins[i];
+
+ if (set_to_target(target, rw_addr, &win32, sizeof(win32)))
+ return -EFAULT;
+ } else {
+ rw_addr += STACK_BIAS;
+ if (set_to_target(target, rw_addr, wbuf, sizeof(*wbuf)))
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
enum sparc_regset {
REGSET_GENERAL,
REGSET_FP,
@@ -133,16 +212,13 @@ static int genregs64_get(struct task_struct *target,
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
regs->u_regs,
0, 16 * sizeof(u64));
- if (!ret) {
- unsigned long __user *reg_window = (unsigned long __user *)
- (regs->u_regs[UREG_I6] + STACK_BIAS);
- unsigned long window[16];
+ if (!ret && count && pos < (32 * sizeof(u64))) {
+ struct reg_window window;
- if (copy_from_user(window, reg_window, sizeof(window)))
+ if (regwindow64_get(target, regs, &window))
return -EFAULT;
-
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- window,
+ &window,
16 * sizeof(u64),
32 * sizeof(u64));
}
@@ -164,10 +240,11 @@ static int genregs64_get(struct task_struct *target,
36 * sizeof(u64));
}
- if (!ret)
+ if (!ret) {
ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
36 * sizeof(u64), -1);
+ }
return ret;
}
@@ -185,20 +262,19 @@ static int genregs64_set(struct task_struct *target,
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
regs->u_regs,
0, 16 * sizeof(u64));
- if (!ret && count > 0) {
- unsigned long __user *reg_window = (unsigned long __user *)
- (regs->u_regs[UREG_I6] + STACK_BIAS);
- unsigned long window[16];
+ if (!ret && count && pos < (32 * sizeof(u64))) {
+ struct reg_window window;
- if (copy_from_user(window, reg_window, sizeof(window)))
+ if (regwindow64_get(target, regs, &window))
return -EFAULT;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- window,
+ &window,
16 * sizeof(u64),
32 * sizeof(u64));
+
if (!ret &&
- copy_to_user(reg_window, window, sizeof(window)))
+ regwindow64_set(target, regs, &window))
return -EFAULT;
}
@@ -412,9 +488,22 @@ static int genregs32_get(struct task_struct *target,
*k++ = regs->u_regs[pos++];
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
- for (; count > 0 && pos < 32; count--) {
- if (get_user(*k++, &reg_window[pos++]))
- return -EFAULT;
+ if (target == current) {
+ for (; count > 0 && pos < 32; count--) {
+ if (get_user(*k++, &reg_window[pos++]))
+ return -EFAULT;
+ }
+ } else {
+ for (; count > 0 && pos < 32; count--) {
+ if (access_process_vm(target,
+ (unsigned long)
+ &reg_window[pos],
+ k, sizeof(*k), 0)
+ != sizeof(*k))
+ return -EFAULT;
+ k++;
+ pos++;
+ }
}
} else {
for (; count > 0 && pos < 16; count--) {
@@ -423,10 +512,28 @@ static int genregs32_get(struct task_struct *target,
}
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
- for (; count > 0 && pos < 32; count--) {
- if (get_user(reg, &reg_window[pos++]) ||
- put_user(reg, u++))
- return -EFAULT;
+ if (target == current) {
+ for (; count > 0 && pos < 32; count--) {
+ if (get_user(reg, &reg_window[pos++]) ||
+ put_user(reg, u++))
+ return -EFAULT;
+ }
+ } else {
+ for (; count > 0 && pos < 32; count--) {
+ if (access_process_vm(target,
+ (unsigned long)
+ &reg_window[pos],
+ &reg, sizeof(reg), 0)
+ != sizeof(reg))
+ return -EFAULT;
+ if (access_process_vm(target,
+ (unsigned long) u,
+ &reg, sizeof(reg), 1)
+ != sizeof(reg))
+ return -EFAULT;
+ pos++;
+ u++;
+ }
}
}
while (count > 0) {
@@ -488,9 +595,23 @@ static int genregs32_set(struct task_struct *target,
regs->u_regs[pos++] = *k++;
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
- for (; count > 0 && pos < 32; count--) {
- if (put_user(*k++, &reg_window[pos++]))
- return -EFAULT;
+ if (target == current) {
+ for (; count > 0 && pos < 32; count--) {
+ if (put_user(*k++, &reg_window[pos++]))
+ return -EFAULT;
+ }
+ } else {
+ for (; count > 0 && pos < 32; count--) {
+ if (access_process_vm(target,
+ (unsigned long)
+ &reg_window[pos],
+ (void *) k,
+ sizeof(*k), 1)
+ != sizeof(*k))
+ return -EFAULT;
+ k++;
+ pos++;
+ }
}
} else {
for (; count > 0 && pos < 16; count--) {
@@ -500,10 +621,29 @@ static int genregs32_set(struct task_struct *target,
}
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
- for (; count > 0 && pos < 32; count--) {
- if (get_user(reg, u++) ||
- put_user(reg, &reg_window[pos++]))
- return -EFAULT;
+ if (target == current) {
+ for (; count > 0 && pos < 32; count--) {
+ if (get_user(reg, u++) ||
+ put_user(reg, &reg_window[pos++]))
+ return -EFAULT;
+ }
+ } else {
+ for (; count > 0 && pos < 32; count--) {
+ if (access_process_vm(target,
+ (unsigned long)
+ u,
+ &reg, sizeof(reg), 0)
+ != sizeof(reg))
+ return -EFAULT;
+ if (access_process_vm(target,
+ (unsigned long)
+ &reg_window[pos],
+ &reg, sizeof(reg), 1)
+ != sizeof(reg))
+ return -EFAULT;
+ pos++;
+ u++;
+ }
}
}
while (count > 0) {
@@ -711,7 +851,7 @@ struct compat_fps {
long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
compat_ulong_t caddr, compat_ulong_t cdata)
{
- const struct user_regset_view *view = task_user_regset_view(child);
+ const struct user_regset_view *view = task_user_regset_view(current);
compat_ulong_t caddr2 = task_pt_regs(current)->u_regs[UREG_I4];
struct pt_regs32 __user *pregs;
struct compat_fps __user *fps;
@@ -819,7 +959,7 @@ struct fps {
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
- const struct user_regset_view *view = task_user_regset_view(child);
+ const struct user_regset_view *view = task_user_regset_view(current);
unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4];
struct pt_regs __user *pregs;
struct fps __user *fps;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 23:17:25 +0100