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parisc: Wire up PTRACE_GETREGS/PTRACE_SETREGS for compat case

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commit 316f1f42b5cc1d95124c1f0387c867c1ba7b6d0e upstream.

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: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # 4.7+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Helge Deller
2023-02-01 16:41:54 +01:00
committed by Greg Kroah-Hartman
parent 2982b473d7
commit 71a4f39f99
1 changed files with 13 additions and 2 deletions
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15
arch/parisc/kernel/ptrace.c
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@@ -127,6 +127,12 @@ long arch_ptrace(struct task_struct *child, long request,
unsigned long tmp; unsigned long tmp;
long ret = -EIO; 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) { switch (request) {
/* Read the word at location addr in the USER area. For ptraced /* Read the word at location addr in the USER area. For ptraced
@@ -182,14 +188,14 @@ long arch_ptrace(struct task_struct *child, long request,
return copy_regset_to_user(child, return copy_regset_to_user(child,
task_user_regset_view(current), task_user_regset_view(current),
REGSET_GENERAL, REGSET_GENERAL,
0, sizeof(struct user_regs_struct), 0, user_regs_struct_size,
datap); datap);
case PTRACE_SETREGS: /* Set all gp regs in the child. */ case PTRACE_SETREGS: /* Set all gp regs in the child. */
return copy_regset_from_user(child, return copy_regset_from_user(child,
task_user_regset_view(current), task_user_regset_view(current),
REGSET_GENERAL, REGSET_GENERAL,
0, sizeof(struct user_regs_struct), 0, user_regs_struct_size,
datap); datap);
case PTRACE_GETFPREGS: /* Get the child FPU state. */ case PTRACE_GETFPREGS: /* Get the child FPU state. */
@@ -303,6 +309,11 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
} }
} }
break; break;
case PTRACE_GETREGS:
case PTRACE_SETREGS:
case PTRACE_GETFPREGS:
case PTRACE_SETFPREGS:
return arch_ptrace(child, request, addr, data);
default: default:
ret = compat_ptrace_request(child, request, addr, data); ret = compat_ptrace_request(child, request, addr, data);