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sparc: Fix regset register window handling.

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We have to adjust 'reg_window' down by 16 becuase the 'pos' iterator
we'll use to index into the stack slots will be between 16 and 32.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2010-03-31 18:05:05 -07:00
parent c4a3987fa0
commit b857bd2922
2 changed files with 8 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/sparc/kernel/ptrace_32.c
+4
View File
@@ -65,6 +65,7 @@ static int genregs32_get(struct task_struct *target,
*k++ = regs->u_regs[pos++]; *k++ = regs->u_regs[pos++];
reg_window = (unsigned long __user *) regs->u_regs[UREG_I6]; reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
reg_window -= 16;
for (; count > 0 && pos < 32; count--) { for (; count > 0 && pos < 32; count--) {
if (get_user(*k++, &reg_window[pos++])) if (get_user(*k++, &reg_window[pos++]))
return -EFAULT; return -EFAULT;
@@ -76,6 +77,7 @@ static int genregs32_get(struct task_struct *target,
} }
reg_window = (unsigned long __user *) regs->u_regs[UREG_I6]; reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
reg_window -= 16;
for (; count > 0 && pos < 32; count--) { for (; count > 0 && pos < 32; count--) {
if (get_user(reg, &reg_window[pos++]) || if (get_user(reg, &reg_window[pos++]) ||
put_user(reg, u++)) put_user(reg, u++))
@@ -141,6 +143,7 @@ static int genregs32_set(struct task_struct *target,
regs->u_regs[pos++] = *k++; regs->u_regs[pos++] = *k++;
reg_window = (unsigned long __user *) regs->u_regs[UREG_I6]; reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
reg_window -= 16;
for (; count > 0 && pos < 32; count--) { for (; count > 0 && pos < 32; count--) {
if (put_user(*k++, &reg_window[pos++])) if (put_user(*k++, &reg_window[pos++]))
return -EFAULT; return -EFAULT;
@@ -153,6 +156,7 @@ static int genregs32_set(struct task_struct *target,
} }
reg_window = (unsigned long __user *) regs->u_regs[UREG_I6]; reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
reg_window -= 16;
for (; count > 0 && pos < 32; count--) { for (; count > 0 && pos < 32; count--) {
if (get_user(reg, u++) || if (get_user(reg, u++) ||
put_user(reg, &reg_window[pos++])) put_user(reg, &reg_window[pos++]))
arch/sparc/kernel/ptrace_64.c
+4
View File
@@ -492,6 +492,7 @@ static int genregs32_get(struct task_struct *target,
*k++ = regs->u_regs[pos++]; *k++ = regs->u_regs[pos++];
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
reg_window -= 16;
if (target == current) { if (target == current) {
for (; count > 0 && pos < 32; count--) { for (; count > 0 && pos < 32; count--) {
if (get_user(*k++, &reg_window[pos++])) if (get_user(*k++, &reg_window[pos++]))
@@ -516,6 +517,7 @@ static int genregs32_get(struct task_struct *target,
} }
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
reg_window -= 16;
if (target == current) { if (target == current) {
for (; count > 0 && pos < 32; count--) { for (; count > 0 && pos < 32; count--) {
if (get_user(reg, &reg_window[pos++]) || if (get_user(reg, &reg_window[pos++]) ||
@@ -599,6 +601,7 @@ static int genregs32_set(struct task_struct *target,
regs->u_regs[pos++] = *k++; regs->u_regs[pos++] = *k++;
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
reg_window -= 16;
if (target == current) { if (target == current) {
for (; count > 0 && pos < 32; count--) { for (; count > 0 && pos < 32; count--) {
if (put_user(*k++, &reg_window[pos++])) if (put_user(*k++, &reg_window[pos++]))
@@ -625,6 +628,7 @@ static int genregs32_set(struct task_struct *target,
} }
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
reg_window -= 16;
if (target == current) { if (target == current) {
for (; count > 0 && pos < 32; count--) { for (; count > 0 && pos < 32; count--) {
if (get_user(reg, u++) || if (get_user(reg, u++) ||