um/ptrace: Fix the syscall number update after a ptrace

[cascardo/linux.git] / arch / x86 / um / ptrace_64.c

diff --git a/arch/x86/um/ptrace_64.c b/arch/x86/um/ptrace_64.c
index faab418..0b5c184 100644 (file)
--- a/arch/x86/um/ptrace_64.c
+++ b/arch/x86/um/ptrace_64.c
@@ -78,7 +78,11 @@ int putreg(struct task_struct *child, int regno, unsigned long value)
        case RSI:
        case RDI:
        case RBP:
+               break;
+
        case ORIG_RAX:
+               /* Update the syscall number. */
+               UPT_SYSCALL_NR(&child->thread.regs.regs) = value;
                break;
 
        case FS: