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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-02 15:18:19 +00:00
[SPARC64]: Add user regsets.
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
parent
ce22e1d394
commit
d09c2a23ee
1 changed files with 581 additions and 1 deletions
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@ -1,6 +1,6 @@
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/* ptrace.c: Sparc process tracing support.
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*
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* Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu)
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* Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net)
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* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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*
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* Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
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@ -22,6 +22,9 @@
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#include <linux/seccomp.h>
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#include <linux/audit.h>
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#include <linux/signal.h>
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#include <linux/regset.h>
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#include <linux/compat.h>
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#include <linux/elf.h>
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#include <asm/asi.h>
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#include <asm/pgtable.h>
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@ -167,6 +170,583 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
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}
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}
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enum sparc_regset {
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REGSET_GENERAL,
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REGSET_FP,
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};
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static int genregs64_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,
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0, 16 * sizeof(u64));
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if (!ret) {
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unsigned long __user *reg_window = (unsigned long __user *)
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(regs->u_regs[UREG_I6] + STACK_BIAS);
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unsigned long window[16];
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if (copy_from_user(window, reg_window, sizeof(window)))
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return -EFAULT;
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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window,
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16 * sizeof(u64),
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32 * sizeof(u64));
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}
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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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32 * sizeof(u64),
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35 * 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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35 * sizeof(u64),
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36 * sizeof(u64));
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}
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if (!ret)
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ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
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36 * sizeof(u64), -1);
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return ret;
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}
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static int genregs64_set(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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const void *kbuf, const void __user *ubuf)
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{
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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_copyin(&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 > 0) {
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unsigned long __user *reg_window = (unsigned long __user *)
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(regs->u_regs[UREG_I6] + STACK_BIAS);
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unsigned long window[16];
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if (copy_from_user(window, reg_window, sizeof(window)))
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return -EFAULT;
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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window,
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16 * sizeof(u64),
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32 * sizeof(u64));
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if (!ret &&
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copy_to_user(reg_window, window, sizeof(window)))
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return -EFAULT;
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}
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if (!ret && count > 0) {
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unsigned long tstate;
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/* TSTATE */
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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&tstate,
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32 * sizeof(u64),
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33 * sizeof(u64));
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if (!ret) {
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/* Only the condition codes can be modified
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* in the %tstate register.
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*/
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tstate &= (TSTATE_ICC | TSTATE_XCC);
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regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC);
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regs->tstate |= tstate;
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}
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}
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if (!ret) {
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/* TPC, TNPC */
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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®s->tpc,
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33 * sizeof(u64),
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35 * sizeof(u64));
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}
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if (!ret) {
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unsigned long y;
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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&y,
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35 * sizeof(u64),
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36 * sizeof(u64));
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if (!ret)
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regs->y = y;
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}
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if (!ret)
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ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
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36 * sizeof(u64), -1);
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return ret;
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}
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static int fpregs64_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, fsr, gsr;
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int ret;
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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_DL)
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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fpregs,
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0, 16 * sizeof(u64));
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else
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ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
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0,
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16 * sizeof(u64));
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if (!ret) {
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if (fprs & FPRS_DU)
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ret = user_regset_copyout(&pos, &count,
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&kbuf, &ubuf,
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fpregs + 16,
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16 * sizeof(u64),
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32 * sizeof(u64));
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else
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ret = user_regset_copyout_zero(&pos, &count,
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&kbuf, &ubuf,
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16 * sizeof(u64),
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32 * sizeof(u64));
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}
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if (fprs & FPRS_FEF) {
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fsr = task_thread_info(target)->xfsr[0];
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gsr = task_thread_info(target)->gsr[0];
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} else {
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fsr = gsr = 0;
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}
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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(u64),
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33 * sizeof(u64));
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if (!ret)
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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&gsr,
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33 * sizeof(u64),
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34 * sizeof(u64));
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if (!ret)
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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&fprs,
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34 * sizeof(u64),
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35 * 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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35 * sizeof(u64), -1);
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return ret;
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}
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static int fpregs64_set(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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const void *kbuf, const void __user *ubuf)
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{
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unsigned long *fpregs = task_thread_info(target)->fpregs;
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unsigned long fprs;
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int ret;
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if (target == current)
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save_and_clear_fpu();
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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fpregs,
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0, 32 * sizeof(u64));
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if (!ret)
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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task_thread_info(target)->xfsr,
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32 * sizeof(u64),
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33 * sizeof(u64));
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if (!ret)
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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task_thread_info(target)->gsr,
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33 * sizeof(u64),
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34 * sizeof(u64));
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fprs = task_thread_info(target)->fpsaved[0];
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if (!ret && count > 0) {
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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&fprs,
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34 * sizeof(u64),
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35 * sizeof(u64));
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}
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fprs |= (FPRS_FEF | FPRS_DL | FPRS_DU);
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task_thread_info(target)->fpsaved[0] = fprs;
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if (!ret)
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ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
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35 * sizeof(u64), -1);
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return ret;
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}
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static const struct user_regset sparc64_regsets[] = {
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/* Format is:
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* G0 --> G7
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* O0 --> O7
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* L0 --> L7
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* I0 --> I7
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* TSTATE, TPC, TNPC, Y
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*/
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[REGSET_GENERAL] = {
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.core_note_type = NT_PRSTATUS,
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.n = 36 * sizeof(u64),
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.size = sizeof(u64), .align = sizeof(u64),
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.get = genregs64_get, .set = genregs64_set
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},
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/* Format is:
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* F0 --> F63
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* FSR
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* GSR
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* FPRS
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*/
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[REGSET_FP] = {
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.core_note_type = NT_PRFPREG,
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.n = 35 * sizeof(u64),
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.size = sizeof(u64), .align = sizeof(u64),
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.get = fpregs64_get, .set = fpregs64_set
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},
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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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};
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static int genregs32_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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compat_ulong_t __user *reg_window;
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compat_ulong_t *k = kbuf;
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compat_ulong_t __user *u = ubuf;
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compat_ulong_t reg;
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if (target == current)
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flushw_user();
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pos /= sizeof(reg);
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count /= sizeof(reg);
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if (kbuf) {
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for (; count > 0 && pos < 16; count--)
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*k++ = regs->u_regs[pos++];
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reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
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for (; count > 0 && pos < 32; count--) {
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if (get_user(*k++, ®_window[pos++]))
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return -EFAULT;
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}
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} else {
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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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}
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reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
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for (; count > 0 && pos < 32; count--) {
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if (get_user(reg, ®_window[pos++]) ||
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put_user(reg, u++))
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return -EFAULT;
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}
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}
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while (count > 0) {
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switch (pos) {
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case 32: /* PSR */
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reg = tstate_to_psr(regs->tstate);
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break;
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case 33: /* PC */
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reg = regs->tpc;
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break;
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case 34: /* NPC */
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reg = regs->tnpc;
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break;
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case 35: /* Y */
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reg = regs->y;
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break;
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case 36: /* WIM */
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case 37: /* TBR */
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reg = 0;
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break;
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default:
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goto finish;
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}
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if (kbuf)
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*k++ = reg;
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else if (put_user(reg, u++))
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return -EFAULT;
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pos++;
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count--;
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}
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finish:
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pos *= sizeof(reg);
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count *= sizeof(reg);
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return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
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38 * sizeof(reg), -1);
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}
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static int genregs32_set(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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const void *kbuf, const void __user *ubuf)
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{
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struct pt_regs *regs = task_pt_regs(target);
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compat_ulong_t __user *reg_window;
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const compat_ulong_t *k = kbuf;
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const compat_ulong_t __user *u = ubuf;
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compat_ulong_t reg;
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if (target == current)
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flushw_user();
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pos /= sizeof(reg);
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count /= sizeof(reg);
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if (kbuf) {
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for (; count > 0 && pos < 16; count--)
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regs->u_regs[pos++] = *k++;
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reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
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for (; count > 0 && pos < 32; count--) {
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if (put_user(*k++, ®_window[pos++]))
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return -EFAULT;
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}
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} else {
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for (; count > 0 && pos < 16; count--) {
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if (get_user(reg, u++))
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return -EFAULT;
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regs->u_regs[pos++] = reg;
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}
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reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
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for (; count > 0 && pos < 32; count--) {
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if (get_user(reg, u++) ||
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put_user(reg, ®_window[pos++]))
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return -EFAULT;
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}
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}
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while (count > 0) {
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unsigned long tstate;
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if (kbuf)
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reg = *k++;
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else if (get_user(reg, u++))
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return -EFAULT;
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switch (pos) {
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case 32: /* PSR */
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tstate = regs->tstate;
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tstate &= ~(TSTATE_ICC | TSTATE_XCC);
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tstate |= psr_to_tstate_icc(reg);
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regs->tstate = tstate;
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break;
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case 33: /* PC */
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regs->tpc = reg;
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break;
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case 34: /* NPC */
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regs->tnpc = reg;
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break;
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case 35: /* Y */
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regs->y = reg;
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break;
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case 36: /* WIM */
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case 37: /* TBR */
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break;
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default:
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goto finish;
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}
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pos++;
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count--;
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}
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finish:
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pos *= sizeof(reg);
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count *= sizeof(reg);
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return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
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38 * sizeof(reg), -1);
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}
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static int fpregs32_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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compat_ulong_t enabled;
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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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enabled = 1;
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} else {
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fsr = 0;
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enabled = 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_zero(&pos, &count, &kbuf, &ubuf,
|
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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(&pos, &count, &kbuf, &ubuf,
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&fsr,
|
||||
33 * sizeof(u32),
|
||||
34 * sizeof(u32));
|
||||
|
||||
if (!ret) {
|
||||
compat_ulong_t val;
|
||||
|
||||
val = (enabled << 8) | (8 << 16);
|
||||
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
|
||||
&val,
|
||||
34 * sizeof(u32),
|
||||
35 * sizeof(u32));
|
||||
}
|
||||
|
||||
if (!ret)
|
||||
ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
|
||||
35 * sizeof(u32), -1);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int fpregs32_set(struct task_struct *target,
|
||||
const struct user_regset *regset,
|
||||
unsigned int pos, unsigned int count,
|
||||
const void *kbuf, const void __user *ubuf)
|
||||
{
|
||||
unsigned long *fpregs = task_thread_info(target)->fpregs;
|
||||
unsigned long fprs;
|
||||
int ret;
|
||||
|
||||
if (target == current)
|
||||
save_and_clear_fpu();
|
||||
|
||||
fprs = task_thread_info(target)->fpsaved[0];
|
||||
|
||||
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
|
||||
fpregs,
|
||||
0, 32 * sizeof(u32));
|
||||
if (!ret)
|
||||
user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
|
||||
32 * sizeof(u32),
|
||||
33 * sizeof(u32));
|
||||
if (!ret && count > 0) {
|
||||
compat_ulong_t fsr;
|
||||
unsigned long val;
|
||||
|
||||
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
|
||||
&fsr,
|
||||
33 * sizeof(u32),
|
||||
34 * sizeof(u32));
|
||||
if (!ret) {
|
||||
val = task_thread_info(target)->xfsr[0];
|
||||
val &= 0xffffffff00000000UL;
|
||||
val |= fsr;
|
||||
task_thread_info(target)->xfsr[0] = val;
|
||||
}
|
||||
}
|
||||
|
||||
fprs |= (FPRS_FEF | FPRS_DL);
|
||||
task_thread_info(target)->fpsaved[0] = fprs;
|
||||
|
||||
if (!ret)
|
||||
ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
|
||||
34 * sizeof(u32), -1);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static const struct user_regset sparc32_regsets[] = {
|
||||
/* Format is:
|
||||
* G0 --> G7
|
||||
* O0 --> O7
|
||||
* L0 --> L7
|
||||
* I0 --> I7
|
||||
* PSR, PC, nPC, Y, WIM, TBR
|
||||
*/
|
||||
[REGSET_GENERAL] = {
|
||||
.core_note_type = NT_PRSTATUS,
|
||||
.n = 38 * sizeof(u32),
|
||||
.size = sizeof(u32), .align = sizeof(u32),
|
||||
.get = genregs32_get, .set = genregs32_set
|
||||
},
|
||||
/* Format is:
|
||||
* F0 --> F31
|
||||
* empty 32-bit word
|
||||
* FSR (32--bit word)
|
||||
* FPU QUEUE COUNT (8-bit char)
|
||||
* FPU QUEUE ENTRYSIZE (8-bit char)
|
||||
* FPU ENABLED (8-bit char)
|
||||
* empty 8-bit char
|
||||
* FPU QUEUE (64 32-bit ints)
|
||||
*/
|
||||
[REGSET_FP] = {
|
||||
.core_note_type = NT_PRFPREG,
|
||||
.n = 99 * sizeof(u32),
|
||||
.size = sizeof(u32), .align = sizeof(u32),
|
||||
.get = fpregs32_get, .set = fpregs32_set
|
||||
},
|
||||
};
|
||||
|
||||
static const struct user_regset_view user_sparc32_view = {
|
||||
.name = "sparc", .e_machine = EM_SPARC,
|
||||
.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
|
||||
};
|
||||
|
||||
const struct user_regset_view *task_user_regset_view(struct task_struct *task)
|
||||
{
|
||||
if (test_tsk_thread_flag(task, TIF_32BIT))
|
||||
return &user_sparc32_view;
|
||||
return &user_sparc64_view;
|
||||
}
|
||||
|
||||
asmlinkage void do_ptrace(struct pt_regs *regs)
|
||||
{
|
||||
int request = regs->u_regs[UREG_I0];
|
||||
|
|
|
|||
Loading…
Reference in a new issue