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sparc64: get rid of odd callers of copy_regset_to_user()
same as for sparc32, and that's it - no more caller of ->get() with non-zero pos. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
87d805331a
commit
8f0329211b
@ -258,7 +258,7 @@ static int genregs64_get(struct task_struct *target,
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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regs->u_regs,
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0, 16 * sizeof(u64));
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if (!ret && count && pos < (32 * sizeof(u64))) {
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if (!ret && count) {
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struct reg_window window;
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if (regwindow64_get(target, regs, &window))
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@ -506,6 +506,57 @@ static const struct user_regset sparc64_regsets[] = {
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},
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};
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static int getregs64_get(struct task_struct *target,
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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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const struct pt_regs *regs = task_pt_regs(target);
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int ret;
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if (target == current)
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flushw_user();
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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regs->u_regs + 1,
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0, 15 * sizeof(u64));
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if (!ret)
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ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
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15 * sizeof(u64), 16 * sizeof(u64));
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if (!ret) {
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/* TSTATE, TPC, TNPC */
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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®s->tstate,
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16 * sizeof(u64),
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19 * sizeof(u64));
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}
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if (!ret) {
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unsigned long y = regs->y;
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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&y,
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19 * sizeof(u64),
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20 * sizeof(u64));
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}
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return ret;
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}
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static const struct user_regset ptrace64_regsets[] = {
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/* Format is:
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* G1 --> G7
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* O0 --> O7
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* 0
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* TSTATE, TPC, TNPC, Y
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*/
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[REGSET_GENERAL] = {
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.n = 20, .size = sizeof(u64), .get = getregs64_get,
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},
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};
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static const struct user_regset_view ptrace64_view = {
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.regsets = ptrace64_regsets, .n = ARRAY_SIZE(ptrace64_regsets)
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};
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static const struct user_regset_view user_sparc64_view = {
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.name = "sparc64", .e_machine = EM_SPARCV9,
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.regsets = sparc64_regsets, .n = ARRAY_SIZE(sparc64_regsets)
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@ -533,7 +584,7 @@ static int genregs32_get(struct task_struct *target,
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for (; count > 0 && pos < 16; count--)
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*k++ = regs->u_regs[pos++];
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if (count && pos < 32) {
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if (count) {
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if (get_from_target(target, regs->u_regs[UREG_I6],
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uregs, sizeof(uregs)))
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return -EFAULT;
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@ -545,7 +596,7 @@ static int genregs32_get(struct task_struct *target,
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for (; count > 0 && pos < 16; count--)
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if (put_user((compat_ulong_t) regs->u_regs[pos++], u++))
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return -EFAULT;
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if (count && pos < 32) {
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if (count) {
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if (get_from_target(target, regs->u_regs[UREG_I6],
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uregs, sizeof(uregs)))
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return -EFAULT;
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@ -840,6 +891,76 @@ static const struct user_regset sparc32_regsets[] = {
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},
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};
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static int getregs_get(struct task_struct *target,
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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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const struct pt_regs *regs = task_pt_regs(target);
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u32 uregs[19];
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int i;
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if (target == current)
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flushw_user();
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uregs[0] = tstate_to_psr(regs->tstate);
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uregs[1] = regs->tpc;
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uregs[2] = regs->tnpc;
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uregs[3] = regs->y;
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for (i = 1; i < 16; i++)
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uregs[3 + i] = regs->u_regs[i];
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return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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uregs,
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0, 19 * sizeof(u32));
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}
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static int getfpregs_get(struct task_struct *target,
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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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const unsigned long *fpregs = task_thread_info(target)->fpregs;
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unsigned long fprs;
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compat_ulong_t fsr;
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int ret = 0;
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if (target == current)
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save_and_clear_fpu();
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fprs = task_thread_info(target)->fpsaved[0];
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if (fprs & FPRS_FEF) {
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fsr = task_thread_info(target)->xfsr[0];
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} else {
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fsr = 0;
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}
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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fpregs,
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0, 32 * sizeof(u32));
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if (!ret)
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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&fsr,
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32 * sizeof(u32),
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33 * sizeof(u32));
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if (!ret)
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ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
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33 * sizeof(u32), 68 * sizeof(u32));
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return ret;
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}
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static const struct user_regset ptrace32_regsets[] = {
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[REGSET_GENERAL] = {
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.n = 19, .size = sizeof(u32), .get = getregs_get,
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},
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[REGSET_FP] = {
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.n = 68, .size = sizeof(u32), .get = getfpregs_get,
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},
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};
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static const struct user_regset_view ptrace32_view = {
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.regsets = ptrace32_regsets, .n = ARRAY_SIZE(ptrace32_regsets)
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};
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static const struct user_regset_view user_sparc32_view = {
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.name = "sparc", .e_machine = EM_SPARC,
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.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
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@ -889,15 +1010,10 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
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break;
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case PTRACE_GETREGS:
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ret = copy_regset_to_user(child, view, REGSET_GENERAL,
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32 * sizeof(u32),
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4 * sizeof(u32),
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&pregs->psr);
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if (!ret)
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ret = copy_regset_to_user(child, view, REGSET_GENERAL,
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1 * sizeof(u32),
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15 * sizeof(u32),
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&pregs->u_regs[0]);
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ret = copy_regset_to_user(child, &ptrace32_view,
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REGSET_GENERAL, 0,
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19 * sizeof(u32),
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pregs);
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break;
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case PTRACE_SETREGS:
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@ -913,22 +1029,10 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
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break;
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case PTRACE_GETFPREGS:
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ret = copy_regset_to_user(child, view, REGSET_FP,
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0 * sizeof(u32),
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32 * sizeof(u32),
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&fps->regs[0]);
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if (!ret)
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ret = copy_regset_to_user(child, view, REGSET_FP,
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33 * sizeof(u32),
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1 * sizeof(u32),
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&fps->fsr);
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if (!ret) {
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if (__put_user(0, &fps->flags) ||
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__put_user(0, &fps->extra) ||
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__put_user(0, &fps->fpqd) ||
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clear_user(&fps->fpq[0], 32 * sizeof(unsigned int)))
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ret = -EFAULT;
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}
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ret = copy_regset_to_user(child, &ptrace32_view,
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REGSET_FP, 0,
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68 * sizeof(u32),
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fps);
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break;
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case PTRACE_SETFPREGS:
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@ -999,17 +1103,10 @@ long arch_ptrace(struct task_struct *child, long request,
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break;
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case PTRACE_GETREGS64:
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ret = copy_regset_to_user(child, view, REGSET_GENERAL,
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1 * sizeof(u64),
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15 * sizeof(u64),
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&pregs->u_regs[0]);
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if (!ret) {
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/* XXX doesn't handle 'y' register correctly XXX */
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ret = copy_regset_to_user(child, view, REGSET_GENERAL,
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32 * sizeof(u64),
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4 * sizeof(u64),
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&pregs->tstate);
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}
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ret = copy_regset_to_user(child, &ptrace64_view,
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REGSET_GENERAL, 0,
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19 * sizeof(u64),
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pregs);
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break;
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case PTRACE_SETREGS64:
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