From: Helge Deller deller@gmx.de
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 --- arch/parisc/kernel/ptrace.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-)
--- a/arch/parisc/kernel/ptrace.c +++ b/arch/parisc/kernel/ptrace.c @@ -132,6 +132,12 @@ long arch_ptrace(struct task_struct *chi 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 @@ -187,14 +193,14 @@ long arch_ptrace(struct task_struct *chi 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. */ @@ -308,6 +314,11 @@ long compat_arch_ptrace(struct task_stru } } 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);