[POWERPC] Use user_regset accessors for FP regs
This implements user_regset-style accessors for the powerpc FPU data, and rewrites the existing ptrace code in terms of those calls. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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@ -21,6 +21,7 @@
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#include <linux/smp.h>
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#include <linux/errno.h>
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#include <linux/ptrace.h>
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#include <linux/regset.h>
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#include <linux/user.h>
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#include <linux/security.h>
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#include <linux/signal.h>
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@ -103,24 +104,48 @@ int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data)
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}
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static int fpr_get(struct task_struct *target, const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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void *kbuf, void __user *ubuf)
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{
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flush_fp_to_thread(target);
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BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) !=
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offsetof(struct thread_struct, fpr[32]));
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return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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&target->thread.fpr, 0, -1);
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}
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static int fpr_set(struct task_struct *target, const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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const void *kbuf, const void __user *ubuf)
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{
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flush_fp_to_thread(target);
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BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) !=
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offsetof(struct thread_struct, fpr[32]));
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return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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&target->thread.fpr, 0, -1);
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}
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static int get_fpregs(void __user *data, struct task_struct *task,
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int has_fpscr)
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{
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unsigned int count = has_fpscr ? 33 : 32;
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if (copy_to_user(data, task->thread.fpr, count * sizeof(double)))
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if (!access_ok(VERIFY_WRITE, data, count * sizeof(double)))
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return -EFAULT;
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return 0;
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return fpr_get(task, NULL, 0, count * sizeof(double), NULL, data);
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}
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static int set_fpregs(void __user *data, struct task_struct *task,
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int has_fpscr)
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{
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unsigned int count = has_fpscr ? 33 : 32;
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if (copy_from_user(task->thread.fpr, data, count * sizeof(double)))
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if (!access_ok(VERIFY_READ, data, count * sizeof(double)))
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return -EFAULT;
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return 0;
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return fpr_set(task, NULL, 0, count * sizeof(double), NULL, data);
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}
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