sh: Fix ptrace fpu state initialisation
Commit 0ea820cf introduced the PTRACE_GETFPREGS/SETFPREGS cmds,
but gdb-server still accesses the FPU state using the
PTRACE_PEEKUSR/POKEUSR commands. In this case, xstate was not
initialised.
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Cc: stable@kernel.org
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index 90a15d2..b53664e 100644
--- a/arch/sh/kernel/ptrace_32.c
+++ b/arch/sh/kernel/ptrace_32.c
@@ -392,6 +392,9 @@
tmp = 0;
} else {
unsigned long index;
+ ret = init_fpu(child);
+ if (ret)
+ break;
index = addr - offsetof(struct user, fpu);
tmp = ((unsigned long *)child->thread.xstate)
[index >> 2];
@@ -423,6 +426,9 @@
else if (addr >= offsetof(struct user, fpu) &&
addr < offsetof(struct user, u_fpvalid)) {
unsigned long index;
+ ret = init_fpu(child);
+ if (ret)
+ break;
index = addr - offsetof(struct user, fpu);
set_stopped_child_used_math(child);
((unsigned long *)child->thread.xstate)
diff --git a/arch/sh/kernel/ptrace_64.c b/arch/sh/kernel/ptrace_64.c
index 4436eac..c8f9764 100644
--- a/arch/sh/kernel/ptrace_64.c
+++ b/arch/sh/kernel/ptrace_64.c
@@ -403,6 +403,9 @@
else if ((addr >= offsetof(struct user, fpu)) &&
(addr < offsetof(struct user, u_fpvalid))) {
unsigned long index;
+ ret = init_fpu(child);
+ if (ret)
+ break;
index = addr - offsetof(struct user, fpu);
tmp = get_fpu_long(child, index);
} else if (addr == offsetof(struct user, u_fpvalid)) {
@@ -442,6 +445,9 @@
else if ((addr >= offsetof(struct user, fpu)) &&
(addr < offsetof(struct user, u_fpvalid))) {
unsigned long index;
+ ret = init_fpu(child);
+ if (ret)
+ break;
index = addr - offsetof(struct user, fpu);
ret = put_fpu_long(child, index, data);
}
