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@@ -36,56 +36,6 @@
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#include <asm/page.h>
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#include <asm/cpudata.h>
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-/* Returning from ptrace is a bit tricky because the syscall return
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- * low level code assumes any value returned which is negative and
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- * is a valid errno will mean setting the condition codes to indicate
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- * an error return. This doesn't work, so we have this hook.
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- */
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-static inline void pt_error_return(struct pt_regs *regs, unsigned long error)
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-{
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- regs->u_regs[UREG_I0] = error;
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- regs->tstate |= (TSTATE_ICARRY | TSTATE_XCARRY);
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- regs->tpc = regs->tnpc;
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- regs->tnpc += 4;
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-}
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-
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-static inline void pt_succ_return(struct pt_regs *regs, unsigned long value)
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-{
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- regs->u_regs[UREG_I0] = value;
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- regs->tstate &= ~(TSTATE_ICARRY | TSTATE_XCARRY);
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- regs->tpc = regs->tnpc;
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- regs->tnpc += 4;
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-}
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-
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-static inline void
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-pt_succ_return_linux(struct pt_regs *regs, unsigned long value, void __user *addr)
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-{
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- if (test_thread_flag(TIF_32BIT)) {
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- if (put_user(value, (unsigned int __user *) addr)) {
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- pt_error_return(regs, EFAULT);
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- return;
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- }
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- } else {
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- if (put_user(value, (long __user *) addr)) {
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- pt_error_return(regs, EFAULT);
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- return;
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- }
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- }
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- regs->u_regs[UREG_I0] = 0;
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- regs->tstate &= ~(TSTATE_ICARRY | TSTATE_XCARRY);
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- regs->tpc = regs->tnpc;
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- regs->tnpc += 4;
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-}
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-
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-static void
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-pt_os_succ_return (struct pt_regs *regs, unsigned long val, void __user *addr)
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-{
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- if (current->personality == PER_SUNOS)
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- pt_succ_return (regs, val);
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- else
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- pt_succ_return_linux (regs, val, addr);
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-}
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-
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/* #define ALLOW_INIT_TRACING */
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/*
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@@ -734,171 +684,113 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task)
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return &user_sparc64_view;
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}
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-asmlinkage void do_ptrace(struct pt_regs *regs)
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+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
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{
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- int request = regs->u_regs[UREG_I0];
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- pid_t pid = regs->u_regs[UREG_I1];
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- unsigned long addr = regs->u_regs[UREG_I2];
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- unsigned long data = regs->u_regs[UREG_I3];
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- unsigned long addr2 = regs->u_regs[UREG_I4];
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- struct task_struct *child;
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- int ret;
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+ long addr2 = task_pt_regs(current)->u_regs[UREG_I4];
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+ int i, ret;
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- if (test_thread_flag(TIF_32BIT)) {
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- addr &= 0xffffffffUL;
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- data &= 0xffffffffUL;
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+#if 1
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+ printk(KERN_INFO
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+ "arch_ptrace: request[%ld] addr[%lx] data[%lx] addr2[%lx]\n",
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+ request, addr, data, addr2);
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+#endif
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+ if (test_thread_flag(TIF_32BIT))
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addr2 &= 0xffffffffUL;
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- }
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- lock_kernel();
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- if (request == PTRACE_TRACEME) {
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- ret = ptrace_traceme();
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- if (ret < 0)
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- pt_error_return(regs, -ret);
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- else
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- pt_succ_return(regs, 0);
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- goto out;
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- }
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-
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- child = ptrace_get_task_struct(pid);
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- if (IS_ERR(child)) {
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- ret = PTR_ERR(child);
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- pt_error_return(regs, -ret);
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- goto out;
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- }
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-
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- if (request == PTRACE_ATTACH) {
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- if (ptrace_attach(child)) {
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- pt_error_return(regs, EPERM);
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- goto out_tsk;
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- }
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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- }
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-
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- ret = ptrace_check_attach(child, request == PTRACE_KILL);
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- if (ret < 0) {
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- pt_error_return(regs, -ret);
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- goto out_tsk;
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- }
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-
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- if (!(test_thread_flag(TIF_32BIT)) &&
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- ((request == PTRACE_READDATA64) ||
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- (request == PTRACE_WRITEDATA64) ||
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- (request == PTRACE_READTEXT64) ||
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- (request == PTRACE_WRITETEXT64) ||
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- (request == PTRACE_PEEKTEXT64) ||
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- (request == PTRACE_POKETEXT64) ||
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- (request == PTRACE_PEEKDATA64) ||
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- (request == PTRACE_POKEDATA64))) {
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- addr = regs->u_regs[UREG_G2];
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- addr2 = regs->u_regs[UREG_G3];
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- request -= 30; /* wheee... */
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- }
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switch(request) {
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case PTRACE_PEEKUSR:
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- if (addr != 0)
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- pt_error_return(regs, EIO);
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- else
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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+ ret = (addr != 0) ? -EIO : 0;
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+ break;
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case PTRACE_PEEKTEXT: /* read word at location addr. */
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case PTRACE_PEEKDATA: {
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unsigned long tmp64;
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unsigned int tmp32;
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- int res, copied;
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+ int copied;
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- res = -EIO;
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+ ret = -EIO;
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if (test_thread_flag(TIF_32BIT)) {
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copied = access_process_vm(child, addr,
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&tmp32, sizeof(tmp32), 0);
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- tmp64 = (unsigned long) tmp32;
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if (copied == sizeof(tmp32))
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- res = 0;
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+ ret = put_user(tmp32,
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+ (unsigned int __user *) data);
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} else {
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copied = access_process_vm(child, addr,
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&tmp64, sizeof(tmp64), 0);
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if (copied == sizeof(tmp64))
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- res = 0;
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+ ret = put_user(tmp64,
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+ (unsigned long __user *) data);
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}
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- if (res < 0)
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- pt_error_return(regs, -res);
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- else
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- pt_os_succ_return(regs, tmp64, (void __user *) data);
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- goto out_tsk;
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+ break;
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}
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case PTRACE_POKETEXT: /* write the word at location addr. */
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case PTRACE_POKEDATA: {
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unsigned long tmp64;
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unsigned int tmp32;
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- int copied, res = -EIO;
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+ int copied;
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+ ret = -EIO;
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if (test_thread_flag(TIF_32BIT)) {
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tmp32 = data;
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copied = access_process_vm(child, addr,
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&tmp32, sizeof(tmp32), 1);
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if (copied == sizeof(tmp32))
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- res = 0;
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+ ret = 0;
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} else {
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tmp64 = data;
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copied = access_process_vm(child, addr,
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&tmp64, sizeof(tmp64), 1);
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if (copied == sizeof(tmp64))
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- res = 0;
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+ ret = 0;
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}
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- if (res < 0)
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- pt_error_return(regs, -res);
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- else
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- pt_succ_return(regs, res);
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- goto out_tsk;
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+ break;
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}
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case PTRACE_GETREGS: {
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struct pt_regs32 __user *pregs =
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(struct pt_regs32 __user *) addr;
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struct pt_regs *cregs = task_pt_regs(child);
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- int rval;
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+ ret = -EFAULT;
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if (__put_user(tstate_to_psr(cregs->tstate), (&pregs->psr)) ||
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__put_user(cregs->tpc, (&pregs->pc)) ||
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__put_user(cregs->tnpc, (&pregs->npc)) ||
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- __put_user(cregs->y, (&pregs->y))) {
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- pt_error_return(regs, EFAULT);
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- goto out_tsk;
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+ __put_user(cregs->y, (&pregs->y)))
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+ break;
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+ for (i = 1; i < 16; i++) {
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+ if (__put_user(cregs->u_regs[i],
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+ (&pregs->u_regs[i - 1])))
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+ break;
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}
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- for (rval = 1; rval < 16; rval++)
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- if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) {
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- pt_error_return(regs, EFAULT);
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- goto out_tsk;
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- }
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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+ if (i == 16)
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+ ret = 0;
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+ break;
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}
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case PTRACE_GETREGS64: {
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struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
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struct pt_regs *cregs = task_pt_regs(child);
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unsigned long tpc = cregs->tpc;
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- int rval;
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if ((task_thread_info(child)->flags & _TIF_32BIT) != 0)
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tpc &= 0xffffffff;
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+
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+ ret = -EFAULT;
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if (__put_user(cregs->tstate, (&pregs->tstate)) ||
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__put_user(tpc, (&pregs->tpc)) ||
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__put_user(cregs->tnpc, (&pregs->tnpc)) ||
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- __put_user(cregs->y, (&pregs->y))) {
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- pt_error_return(regs, EFAULT);
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- goto out_tsk;
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+ __put_user(cregs->y, (&pregs->y)))
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+ break;
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+ for (i = 1; i < 16; i++) {
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+ if (__put_user(cregs->u_regs[i],
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+ (&pregs->u_regs[i - 1])))
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+ break;
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}
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- for (rval = 1; rval < 16; rval++)
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- if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) {
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- pt_error_return(regs, EFAULT);
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- goto out_tsk;
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- }
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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+ if (i == 16)
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+ ret = 0;
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+ break;
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}
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case PTRACE_SETREGS: {
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@@ -906,18 +798,16 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
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(struct pt_regs32 __user *) addr;
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struct pt_regs *cregs = task_pt_regs(child);
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unsigned int psr, pc, npc, y;
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- int i;
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/* Must be careful, tracing process can only set certain
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* bits in the psr.
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*/
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+ ret = -EFAULT;
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if (__get_user(psr, (&pregs->psr)) ||
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__get_user(pc, (&pregs->pc)) ||
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__get_user(npc, (&pregs->npc)) ||
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- __get_user(y, (&pregs->y))) {
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- pt_error_return(regs, EFAULT);
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- goto out_tsk;
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- }
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+ __get_user(y, (&pregs->y)))
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+ break;
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cregs->tstate &= ~(TSTATE_ICC);
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cregs->tstate |= psr_to_tstate_icc(psr);
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if (!((pc | npc) & 3)) {
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@@ -926,31 +816,28 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
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}
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cregs->y = y;
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for (i = 1; i < 16; i++) {
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- if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) {
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- pt_error_return(regs, EFAULT);
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- goto out_tsk;
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- }
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+ if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1])))
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+ break;
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}
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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+ if (i == 16)
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+ ret = 0;
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+ break;
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}
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case PTRACE_SETREGS64: {
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struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
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struct pt_regs *cregs = task_pt_regs(child);
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unsigned long tstate, tpc, tnpc, y;
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- int i;
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/* Must be careful, tracing process can only set certain
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* bits in the psr.
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*/
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+ ret = -EFAULT;
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if (__get_user(tstate, (&pregs->tstate)) ||
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__get_user(tpc, (&pregs->tpc)) ||
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__get_user(tnpc, (&pregs->tnpc)) ||
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- __get_user(y, (&pregs->y))) {
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- pt_error_return(regs, EFAULT);
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- goto out_tsk;
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- }
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+ __get_user(y, (&pregs->y)))
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+ break;
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if ((task_thread_info(child)->flags & _TIF_32BIT) != 0) {
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tpc &= 0xffffffff;
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tnpc &= 0xffffffff;
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@@ -964,13 +851,12 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
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}
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cregs->y = y;
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for (i = 1; i < 16; i++) {
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- if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) {
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- pt_error_return(regs, EFAULT);
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- goto out_tsk;
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- }
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+ if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1])))
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+ break;
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}
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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+ if (i == 16)
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+ ret = 0;
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+ break;
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}
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case PTRACE_GETFPREGS: {
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@@ -988,18 +874,18 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
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struct fps __user *fps = (struct fps __user *) addr;
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unsigned long *fpregs = task_thread_info(child)->fpregs;
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+ ret = -EFAULT;
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if (copy_to_user(&fps->regs[0], fpregs,
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(32 * sizeof(unsigned int))) ||
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__put_user(task_thread_info(child)->xfsr[0], (&fps->fsr)) ||
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__put_user(0, (&fps->fpqd)) ||
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__put_user(0, (&fps->flags)) ||
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__put_user(0, (&fps->extra)) ||
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- clear_user(&fps->fpq[0], 32 * sizeof(unsigned int))) {
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- pt_error_return(regs, EFAULT);
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- goto out_tsk;
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- }
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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+ clear_user(&fps->fpq[0], 32 * sizeof(unsigned int)))
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+ break;
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+
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+ ret = 0;
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+ break;
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}
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case PTRACE_GETFPREGS64: {
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@@ -1010,14 +896,14 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
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struct fps __user *fps = (struct fps __user *) addr;
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unsigned long *fpregs = task_thread_info(child)->fpregs;
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+ ret = -EFAULT;
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if (copy_to_user(&fps->regs[0], fpregs,
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(64 * sizeof(unsigned int))) ||
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- __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) {
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- pt_error_return(regs, EFAULT);
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- goto out_tsk;
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- }
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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+ __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr)))
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+ break;
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+
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+ ret = 0;
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+ break;
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}
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case PTRACE_SETFPREGS: {
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@@ -1036,19 +922,19 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
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unsigned long *fpregs = task_thread_info(child)->fpregs;
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unsigned fsr;
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+ ret = -EFAULT;
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if (copy_from_user(fpregs, &fps->regs[0],
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(32 * sizeof(unsigned int))) ||
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- __get_user(fsr, (&fps->fsr))) {
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- pt_error_return(regs, EFAULT);
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- goto out_tsk;
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- }
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+ __get_user(fsr, (&fps->fsr)))
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+ break;
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+
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task_thread_info(child)->xfsr[0] &= 0xffffffff00000000UL;
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task_thread_info(child)->xfsr[0] |= fsr;
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if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF))
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task_thread_info(child)->gsr[0] = 0;
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task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL);
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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+ ret = 0;
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+ break;
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}
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case PTRACE_SETFPREGS64: {
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@@ -1059,113 +945,56 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
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struct fps __user *fps = (struct fps __user *) addr;
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unsigned long *fpregs = task_thread_info(child)->fpregs;
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+ ret = -EFAULT;
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if (copy_from_user(fpregs, &fps->regs[0],
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(64 * sizeof(unsigned int))) ||
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- __get_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) {
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- pt_error_return(regs, EFAULT);
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- goto out_tsk;
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- }
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+ __get_user(task_thread_info(child)->xfsr[0], (&fps->fsr)))
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+ break;
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+
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if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF))
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task_thread_info(child)->gsr[0] = 0;
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- task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL | FPRS_DU);
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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+ task_thread_info(child)->fpsaved[0] |=
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+ (FPRS_FEF | FPRS_DL | FPRS_DU);
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+ ret = 0;
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+ break;
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}
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case PTRACE_READTEXT:
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- case PTRACE_READDATA: {
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- int res = ptrace_readdata(child, addr,
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- (char __user *)addr2, data);
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- if (res == data) {
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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- }
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- if (res >= 0)
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- res = -EIO;
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- pt_error_return(regs, -res);
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- goto out_tsk;
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- }
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+ case PTRACE_READDATA:
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+ ret = ptrace_readdata(child, addr,
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+ (char __user *)addr2, data);
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+ if (ret == data)
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+ ret = 0;
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+ else if (ret >= 0)
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+ ret = -EIO;
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+ break;
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case PTRACE_WRITETEXT:
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- case PTRACE_WRITEDATA: {
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- int res = ptrace_writedata(child, (char __user *) addr2,
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- addr, data);
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- if (res == data) {
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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- }
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- if (res >= 0)
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- res = -EIO;
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- pt_error_return(regs, -res);
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- goto out_tsk;
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- }
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- case PTRACE_SYSCALL: /* continue and stop at (return from) syscall */
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- addr = 1;
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-
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- case PTRACE_CONT: { /* restart after signal. */
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- if (!valid_signal(data)) {
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- pt_error_return(regs, EIO);
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- goto out_tsk;
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- }
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-
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- if (request == PTRACE_SYSCALL) {
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- set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
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- } else {
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- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
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- }
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-
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- child->exit_code = data;
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- wake_up_process(child);
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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- }
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-
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-/*
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- * make the child exit. Best I can do is send it a sigkill.
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- * perhaps it should be put in the status that it wants to
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- * exit.
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- */
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- case PTRACE_KILL: {
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- if (child->exit_state == EXIT_ZOMBIE) { /* already dead */
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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- }
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- child->exit_code = SIGKILL;
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- wake_up_process(child);
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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- }
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+ case PTRACE_WRITEDATA:
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+ ret = ptrace_writedata(child, (char __user *) addr2,
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+ addr, data);
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+ if (ret == data)
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+ ret = 0;
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+ else if (ret >= 0)
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+ ret = -EIO;
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+ break;
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case PTRACE_GETEVENTMSG: {
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- int err;
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-
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if (test_thread_flag(TIF_32BIT))
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- err = put_user(child->ptrace_message,
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+ ret = put_user(child->ptrace_message,
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(unsigned int __user *) data);
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else
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- err = put_user(child->ptrace_message,
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+ ret = put_user(child->ptrace_message,
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(unsigned long __user *) data);
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- if (err)
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- pt_error_return(regs, -err);
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- else
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- pt_succ_return(regs, 0);
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break;
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}
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- default: {
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- int err = ptrace_request(child, request, addr, data);
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- if (err)
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- pt_error_return(regs, -err);
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- else
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- pt_succ_return(regs, 0);
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- goto out_tsk;
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- }
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+ default:
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+ ret = ptrace_request(child, request, addr, data);
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+ break;
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}
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-out_tsk:
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- if (child)
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- put_task_struct(child);
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-out:
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- unlock_kernel();
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+
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+ return ret;
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}
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asmlinkage void syscall_trace(struct pt_regs *regs, int syscall_exit_p)
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