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path: root/arch/sparc/kernel/unaligned_64.c
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Diffstat (limited to 'arch/sparc/kernel/unaligned_64.c')
-rw-r--r--arch/sparc/kernel/unaligned_64.c36
1 files changed, 23 insertions, 13 deletions
diff --git a/arch/sparc/kernel/unaligned_64.c b/arch/sparc/kernel/unaligned_64.c
index f81d038f7340..8201c25e7669 100644
--- a/arch/sparc/kernel/unaligned_64.c
+++ b/arch/sparc/kernel/unaligned_64.c
@@ -113,21 +113,24 @@ static inline long sign_extend_imm13(long imm)
static unsigned long fetch_reg(unsigned int reg, struct pt_regs *regs)
{
- unsigned long value;
+ unsigned long value, fp;
if (reg < 16)
return (!reg ? 0 : regs->u_regs[reg]);
+
+ fp = regs->u_regs[UREG_FP];
+
if (regs->tstate & TSTATE_PRIV) {
struct reg_window *win;
- win = (struct reg_window *)(regs->u_regs[UREG_FP] + STACK_BIAS);
+ win = (struct reg_window *)(fp + STACK_BIAS);
value = win->locals[reg - 16];
- } else if (test_thread_flag(TIF_32BIT)) {
+ } else if (!test_thread_64bit_stack(fp)) {
struct reg_window32 __user *win32;
- win32 = (struct reg_window32 __user *)((unsigned long)((u32)regs->u_regs[UREG_FP]));
+ win32 = (struct reg_window32 __user *)((unsigned long)((u32)fp));
get_user(value, &win32->locals[reg - 16]);
} else {
struct reg_window __user *win;
- win = (struct reg_window __user *)(regs->u_regs[UREG_FP] + STACK_BIAS);
+ win = (struct reg_window __user *)(fp + STACK_BIAS);
get_user(value, &win->locals[reg - 16]);
}
return value;
@@ -135,19 +138,24 @@ static unsigned long fetch_reg(unsigned int reg, struct pt_regs *regs)
static unsigned long *fetch_reg_addr(unsigned int reg, struct pt_regs *regs)
{
+ unsigned long fp;
+
if (reg < 16)
return &regs->u_regs[reg];
+
+ fp = regs->u_regs[UREG_FP];
+
if (regs->tstate & TSTATE_PRIV) {
struct reg_window *win;
- win = (struct reg_window *)(regs->u_regs[UREG_FP] + STACK_BIAS);
+ win = (struct reg_window *)(fp + STACK_BIAS);
return &win->locals[reg - 16];
- } else if (test_thread_flag(TIF_32BIT)) {
+ } else if (!test_thread_64bit_stack(fp)) {
struct reg_window32 *win32;
- win32 = (struct reg_window32 *)((unsigned long)((u32)regs->u_regs[UREG_FP]));
+ win32 = (struct reg_window32 *)((unsigned long)((u32)fp));
return (unsigned long *)&win32->locals[reg - 16];
} else {
struct reg_window *win;
- win = (struct reg_window *)(regs->u_regs[UREG_FP] + STACK_BIAS);
+ win = (struct reg_window *)(fp + STACK_BIAS);
return &win->locals[reg - 16];
}
}
@@ -392,13 +400,15 @@ int handle_popc(u32 insn, struct pt_regs *regs)
if (rd)
regs->u_regs[rd] = ret;
} else {
- if (test_thread_flag(TIF_32BIT)) {
+ unsigned long fp = regs->u_regs[UREG_FP];
+
+ if (!test_thread_64bit_stack(fp)) {
struct reg_window32 __user *win32;
- win32 = (struct reg_window32 __user *)((unsigned long)((u32)regs->u_regs[UREG_FP]));
+ win32 = (struct reg_window32 __user *)((unsigned long)((u32)fp));
put_user(ret, &win32->locals[rd - 16]);
} else {
struct reg_window __user *win;
- win = (struct reg_window __user *)(regs->u_regs[UREG_FP] + STACK_BIAS);
+ win = (struct reg_window __user *)(fp + STACK_BIAS);
put_user(ret, &win->locals[rd - 16]);
}
}
@@ -554,7 +564,7 @@ void handle_ld_nf(u32 insn, struct pt_regs *regs)
reg[0] = 0;
if ((insn & 0x780000) == 0x180000)
reg[1] = 0;
- } else if (test_thread_flag(TIF_32BIT)) {
+ } else if (!test_thread_64bit_stack(regs->u_regs[UREG_FP])) {
put_user(0, (int __user *) reg);
if ((insn & 0x780000) == 0x180000)
put_user(0, ((int __user *) reg) + 1);