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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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[IA64] utrace Convert compat ptrace to use compat_sys_ptrace
Convert IA64 32-bit ptrace to use compat_sys_ptrace. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
parent
9690ad0312
commit
680973edf1
4 changed files with 89 additions and 87 deletions
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@ -204,7 +204,7 @@ ia32_syscall_table:
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data8 sys_setuid /* 16-bit version */
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data8 sys_getuid /* 16-bit version */
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data8 compat_sys_stime /* 25 */
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data8 sys32_ptrace
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data8 compat_sys_ptrace
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data8 sys32_alarm
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data8 sys_ni_syscall
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data8 sys32_pause
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@ -1300,25 +1300,6 @@ sys32_waitpid (int pid, unsigned int *stat_addr, int options)
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return compat_sys_wait4(pid, stat_addr, options, NULL);
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}
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static unsigned int
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ia32_peek (struct task_struct *child, unsigned long addr, unsigned int *val)
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{
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size_t copied;
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unsigned int ret;
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copied = access_process_vm(child, addr, val, sizeof(*val), 0);
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return (copied != sizeof(ret)) ? -EIO : 0;
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}
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static unsigned int
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ia32_poke (struct task_struct *child, unsigned long addr, unsigned int val)
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{
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if (access_process_vm(child, addr, &val, sizeof(val), 1) != sizeof(val))
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return -EIO;
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return 0;
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}
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/*
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* The order in which registers are stored in the ptrace regs structure
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*/
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@ -1616,49 +1597,15 @@ restore_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct __u
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return 0;
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}
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asmlinkage long
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sys32_ptrace (int request, pid_t pid, unsigned int addr, unsigned int data)
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long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
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compat_ulong_t caddr, compat_ulong_t cdata)
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{
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struct task_struct *child;
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unsigned int value, tmp;
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unsigned long addr = caddr;
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unsigned long data = cdata;
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unsigned int tmp;
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long i, ret;
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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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goto out;
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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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goto out;
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}
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if (request == PTRACE_ATTACH) {
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ret = sys_ptrace(request, pid, addr, data);
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goto out_tsk;
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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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goto out_tsk;
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switch (request) {
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case PTRACE_PEEKTEXT:
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case PTRACE_PEEKDATA: /* read word at location addr */
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ret = ia32_peek(child, addr, &value);
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if (ret == 0)
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ret = put_user(value, (unsigned int __user *) compat_ptr(data));
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else
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ret = -EIO;
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goto out_tsk;
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case PTRACE_POKETEXT:
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case PTRACE_POKEDATA: /* write the word at location addr */
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ret = ia32_poke(child, addr, data);
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goto out_tsk;
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case PTRACE_PEEKUSR: /* read word at addr in USER area */
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ret = -EIO;
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if ((addr & 3) || addr > 17*sizeof(int))
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@ -1723,27 +1670,9 @@ sys32_ptrace (int request, pid_t pid, unsigned int addr, unsigned int data)
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compat_ptr(data));
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break;
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case PTRACE_GETEVENTMSG:
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ret = put_user(child->ptrace_message, (unsigned int __user *) compat_ptr(data));
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break;
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case PTRACE_SYSCALL: /* continue, stop after next syscall */
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case PTRACE_CONT: /* restart after signal. */
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case PTRACE_KILL:
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case PTRACE_SINGLESTEP: /* execute chile for one instruction */
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case PTRACE_DETACH: /* detach a process */
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ret = sys_ptrace(request, pid, addr, data);
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break;
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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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return compat_ptrace_request(child, request, caddr, cdata);
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}
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out_tsk:
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put_task_struct(child);
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out:
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unlock_kernel();
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return ret;
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}
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@ -325,6 +325,8 @@ static inline unsigned long user_stack_pointer(struct pt_regs *regs)
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#define arch_has_block_step() (1)
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extern void user_enable_block_step(struct task_struct *);
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#define __ARCH_WANT_COMPAT_SYS_PTRACE
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#endif /* !__KERNEL__ */
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/* pt_all_user_regs is used for PTRACE_GETREGS PTRACE_SETREGS */
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@ -19,24 +19,35 @@
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static inline long syscall_get_nr(struct task_struct *task,
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struct pt_regs *regs)
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{
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BUG_ON(IS_IA32_PROCESS(regs));
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if ((long)regs->cr_ifs < 0) /* Not a syscall */
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return -1;
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#ifdef CONFIG_IA32_SUPPORT
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if (IS_IA32_PROCESS(regs))
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return regs->r1;
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#endif
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return regs->r15;
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}
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static inline void syscall_rollback(struct task_struct *task,
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struct pt_regs *regs)
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{
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BUG_ON(IS_IA32_PROCESS(regs));
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#ifdef CONFIG_IA32_SUPPORT
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if (IS_IA32_PROCESS(regs))
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regs->r8 = regs->r1;
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#endif
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/* do nothing */
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}
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static inline long syscall_get_error(struct task_struct *task,
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struct pt_regs *regs)
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{
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BUG_ON(IS_IA32_PROCESS(regs));
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#ifdef CONFIG_IA32_SUPPORT
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if (IS_IA32_PROCESS(regs))
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return regs->r8;
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#endif
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return regs->r10 == -1 ? regs->r8:0;
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}
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@ -44,8 +55,6 @@ static inline long syscall_get_error(struct task_struct *task,
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static inline long syscall_get_return_value(struct task_struct *task,
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struct pt_regs *regs)
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{
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BUG_ON(IS_IA32_PROCESS(regs));
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return regs->r8;
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}
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@ -53,7 +62,12 @@ static inline void syscall_set_return_value(struct task_struct *task,
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struct pt_regs *regs,
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int error, long val)
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{
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BUG_ON(IS_IA32_PROCESS(regs));
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#ifdef CONFIG_IA32_SUPPORT
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if (IS_IA32_PROCESS(regs)) {
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regs->r8 = (long) error ? error : val;
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return;
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}
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#endif
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if (error) {
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/* error < 0, but ia64 uses > 0 return value */
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@ -73,9 +87,39 @@ static inline void syscall_get_arguments(struct task_struct *task,
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unsigned int i, unsigned int n,
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unsigned long *args)
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{
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BUG_ON(IS_IA32_PROCESS(regs));
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BUG_ON(i + n > 6);
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#ifdef CONFIG_IA32_SUPPORT
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if (IS_IA32_PROCESS(regs)) {
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switch (i + n) {
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case 6:
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if (!n--) break;
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*args++ = regs->r13;
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case 5:
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if (!n--) break;
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*args++ = regs->r15;
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case 4:
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if (!n--) break;
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*args++ = regs->r14;
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case 3:
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if (!n--) break;
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*args++ = regs->r10;
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case 2:
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if (!n--) break;
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*args++ = regs->r9;
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case 1:
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if (!n--) break;
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*args++ = regs->r11;
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case 0:
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if (!n--) break;
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default:
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BUG();
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break;
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}
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return;
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}
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#endif
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ia64_syscall_get_set_arguments(task, regs, i, n, args, 0);
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}
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@ -84,9 +128,36 @@ static inline void syscall_set_arguments(struct task_struct *task,
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unsigned int i, unsigned int n,
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unsigned long *args)
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{
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BUG_ON(IS_IA32_PROCESS(regs));
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BUG_ON(i + n > 6);
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#ifdef CONFIG_IA32_SUPPORT
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if (IS_IA32_PROCESS(regs)) {
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switch (i + n) {
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case 6:
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if (!n--) break;
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regs->r13 = *args++;
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case 5:
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if (!n--) break;
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regs->r15 = *args++;
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case 4:
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if (!n--) break;
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regs->r14 = *args++;
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case 3:
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if (!n--) break;
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regs->r10 = *args++;
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case 2:
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if (!n--) break;
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regs->r9 = *args++;
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case 1:
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if (!n--) break;
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regs->r11 = *args++;
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case 0:
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if (!n--) break;
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}
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return;
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}
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#endif
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ia64_syscall_get_set_arguments(task, regs, i, n, args, 1);
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}
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#endif /* _ASM_SYSCALL_H */
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