x86 ptrace: fix PTRACE_GETFPXREGS error
ptrace has always returned only -EIO for all failures to access registers. The user_regset calls are allowed to return a more meaningful variety of errors. The REGSET_XFP calls use -ENODEV for !cpu_has_fxsr hardware. Make ptrace return the traditional -EIO instead of the error code from the user_regset call. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: stable@kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>hifive-unleashed-5.1
parent
e1441b9a41
commit
45fdc3a762
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@ -162,7 +162,7 @@ int xfpregs_get(struct task_struct *target, const struct user_regset *regset,
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int ret;
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int ret;
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if (!cpu_has_fxsr)
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if (!cpu_has_fxsr)
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return -EIO;
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return -ENODEV;
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ret = init_fpu(target);
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ret = init_fpu(target);
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if (ret)
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if (ret)
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@ -179,7 +179,7 @@ int xfpregs_set(struct task_struct *target, const struct user_regset *regset,
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int ret;
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int ret;
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if (!cpu_has_fxsr)
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if (!cpu_has_fxsr)
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return -EIO;
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return -ENODEV;
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ret = init_fpu(target);
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ret = init_fpu(target);
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if (ret)
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if (ret)
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@ -943,13 +943,13 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
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return copy_regset_to_user(child, &user_x86_32_view,
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return copy_regset_to_user(child, &user_x86_32_view,
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REGSET_XFP,
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REGSET_XFP,
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0, sizeof(struct user_fxsr_struct),
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0, sizeof(struct user_fxsr_struct),
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datap);
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datap) ? -EIO : 0;
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case PTRACE_SETFPXREGS: /* Set the child extended FPU state. */
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case PTRACE_SETFPXREGS: /* Set the child extended FPU state. */
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return copy_regset_from_user(child, &user_x86_32_view,
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return copy_regset_from_user(child, &user_x86_32_view,
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REGSET_XFP,
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REGSET_XFP,
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0, sizeof(struct user_fxsr_struct),
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0, sizeof(struct user_fxsr_struct),
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datap);
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datap) ? -EIO : 0;
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#endif
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#endif
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#if defined CONFIG_X86_32 || defined CONFIG_IA32_EMULATION
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#if defined CONFIG_X86_32 || defined CONFIG_IA32_EMULATION
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