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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2006-03-12 22:36:06 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-03-12 22:36:06 +0000 |
| commit | cdaabbd74b15296acf09215355a7f3b07b92b83e (patch) | |
| tree | da2e2ce07a31eb10cb3649005479a9588ba22809 /arch/arm | |
| parent | 04916c0ef482335cb0ae575dbc5a1d97619840cd (diff) | |
| download | linux-cdaabbd74b15296acf09215355a7f3b07b92b83e.tar.bz2 | |
[ARM] iwmmxt thread state alignment
This patch removes the reliance of iwmmxt on hand coded alignments.
Since thread_info is always 8K aligned, specifying that fpstate is
8-byte aligned achieves the same effect without needing to resort
to hand coded alignments.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/kernel/asm-offsets.c | 4 | ||||
| -rw-r--r-- | arch/arm/kernel/ptrace.c | 14 |
2 files changed, 7 insertions, 11 deletions
diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c index 0abbce8c70bc..b324dcac1c56 100644 --- a/arch/arm/kernel/asm-offsets.c +++ b/arch/arm/kernel/asm-offsets.c @@ -57,7 +57,9 @@ int main(void) DEFINE(TI_TP_VALUE, offsetof(struct thread_info, tp_value)); DEFINE(TI_FPSTATE, offsetof(struct thread_info, fpstate)); DEFINE(TI_VFPSTATE, offsetof(struct thread_info, vfpstate)); - DEFINE(TI_IWMMXT_STATE, (offsetof(struct thread_info, fpstate)+4)&~7); +#ifdef CONFIG_IWMMXT + DEFINE(TI_IWMMXT_STATE, offsetof(struct thread_info, fpstate.iwmmxt)); +#endif BLANK(); DEFINE(S_R0, offsetof(struct pt_regs, ARM_r0)); DEFINE(S_R1, offsetof(struct pt_regs, ARM_r1)); diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c index 7b6256bb590e..bc9e2f8ae326 100644 --- a/arch/arm/kernel/ptrace.c +++ b/arch/arm/kernel/ptrace.c @@ -610,15 +610,12 @@ static int ptrace_setfpregs(struct task_struct *tsk, void __user *ufp) static int ptrace_getwmmxregs(struct task_struct *tsk, void __user *ufp) { struct thread_info *thread = task_thread_info(tsk); - void *ptr = &thread->fpstate; if (!test_ti_thread_flag(thread, TIF_USING_IWMMXT)) return -ENODATA; iwmmxt_task_disable(thread); /* force it to ram */ - /* The iWMMXt state is stored doubleword-aligned. */ - if (((long) ptr) & 4) - ptr += 4; - return copy_to_user(ufp, ptr, 0x98) ? -EFAULT : 0; + return copy_to_user(ufp, &thread->fpstate.iwmmxt, IWMMXT_SIZE) + ? -EFAULT : 0; } /* @@ -627,15 +624,12 @@ static int ptrace_getwmmxregs(struct task_struct *tsk, void __user *ufp) static int ptrace_setwmmxregs(struct task_struct *tsk, void __user *ufp) { struct thread_info *thread = task_thread_info(tsk); - void *ptr = &thread->fpstate; if (!test_ti_thread_flag(thread, TIF_USING_IWMMXT)) return -EACCES; iwmmxt_task_release(thread); /* force a reload */ - /* The iWMMXt state is stored doubleword-aligned. */ - if (((long) ptr) & 4) - ptr += 4; - return copy_from_user(ptr, ufp, 0x98) ? -EFAULT : 0; + return copy_from_user(&thead->fpstate.iwmmxt, ufp, IWMMXT_SIZE) + ? -EFAULT : 0; } #endif |