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platform_kernel-5.15
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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>
This commit is contained in:
Phil Edworthy 2011-03-18 14:16:31 +00:00 committed by Paul Mundt
parent 3f4caa8157
commit c49b6ecf08
2 changed files with 12 additions and 0 deletions
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6
arch/sh/kernel/ptrace_32.c
View File

@ -392,6 +392,9 @@ long arch_ptrace(struct task_struct *child, long request,
tmp = 0; tmp = 0;
} else { } else {
unsigned long index; unsigned long index;
ret = init_fpu(child);
if (ret)
break;
index = addr - offsetof(struct user, fpu); index = addr - offsetof(struct user, fpu);
tmp = ((unsigned long *)child->thread.xstate) tmp = ((unsigned long *)child->thread.xstate)
[index >> 2]; [index >> 2];
@ -423,6 +426,9 @@ long arch_ptrace(struct task_struct *child, long request,
else if (addr >= offsetof(struct user, fpu) && else if (addr >= offsetof(struct user, fpu) &&
addr < offsetof(struct user, u_fpvalid)) { addr < offsetof(struct user, u_fpvalid)) {
unsigned long index; unsigned long index;
ret = init_fpu(child);
if (ret)
break;
index = addr - offsetof(struct user, fpu); index = addr - offsetof(struct user, fpu);
set_stopped_child_used_math(child); set_stopped_child_used_math(child);
((unsigned long *)child->thread.xstate) ((unsigned long *)child->thread.xstate)

6
arch/sh/kernel/ptrace_64.c
View File

@ -403,6 +403,9 @@ long arch_ptrace(struct task_struct *child, long request,
else if ((addr >= offsetof(struct user, fpu)) && else if ((addr >= offsetof(struct user, fpu)) &&
(addr < offsetof(struct user, u_fpvalid))) { (addr < offsetof(struct user, u_fpvalid))) {
unsigned long index; unsigned long index;
ret = init_fpu(child);
if (ret)
break;
index = addr - offsetof(struct user, fpu); index = addr - offsetof(struct user, fpu);
tmp = get_fpu_long(child, index); tmp = get_fpu_long(child, index);
} else if (addr == offsetof(struct user, u_fpvalid)) { } else if (addr == offsetof(struct user, u_fpvalid)) {
@ -442,6 +445,9 @@ long arch_ptrace(struct task_struct *child, long request,
else if ((addr >= offsetof(struct user, fpu)) && else if ((addr >= offsetof(struct user, fpu)) &&
(addr < offsetof(struct user, u_fpvalid))) { (addr < offsetof(struct user, u_fpvalid))) {
unsigned long index; unsigned long index;
ret = init_fpu(child);
if (ret)
break;
index = addr - offsetof(struct user, fpu); index = addr - offsetof(struct user, fpu);
ret = put_fpu_long(child, index, data); ret = put_fpu_long(child, index, data);
} }