Commit 316f1f42 authored by Helge Deller's avatar Helge Deller
Browse files

parisc: Wire up PTRACE_GETREGS/PTRACE_SETREGS for compat case 



Wire up the missing ptrace requests PTRACE_GETREGS, PTRACE_SETREGS,
PTRACE_GETFPREGS and PTRACE_SETFPREGS when running 32-bit applications
on 64-bit kernels.

Signed-off-by: default avatarHelge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # 4.7+
parent 3f0c1780

arch/parisc/kernel/ptrace.c

+13 −2
Original line number Diff line number Diff line
@@ -126,6 +126,12 @@ long arch_ptrace(struct task_struct *child, long request, 
	unsigned long tmp;

	long ret = -EIO;



	unsigned long user_regs_struct_size = sizeof(struct user_regs_struct);

#ifdef CONFIG_64BIT

	if (is_compat_task())

		user_regs_struct_size /= 2;

#endif



	switch (request) {



	/* Read the word at location addr in the USER area.  For ptraced
@@ -181,14 +187,14 @@ long arch_ptrace(struct task_struct *child, long request, 
		return copy_regset_to_user(child,

					   task_user_regset_view(current),

					   REGSET_GENERAL,

					   0, sizeof(struct user_regs_struct),

					   0, user_regs_struct_size,

					   datap);



	case PTRACE_SETREGS:	/* Set all gp regs in the child. */

		return copy_regset_from_user(child,

					     task_user_regset_view(current),

					     REGSET_GENERAL,

					     0, sizeof(struct user_regs_struct),

					     0, user_regs_struct_size,

					     datap);



	case PTRACE_GETFPREGS:	/* Get the child FPU state. */
@@ -302,6 +308,11 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 
			}

		}

		break;

	case PTRACE_GETREGS:

	case PTRACE_SETREGS:

	case PTRACE_GETFPREGS:

	case PTRACE_SETFPREGS:

		return arch_ptrace(child, request, addr, data);



	default:

		ret = compat_ptrace_request(child, request, addr, data);