From 1d80f0cda10118d7505bd0a09a5c1c72f3a5f6c8 Mon Sep 17 00:00:00 2001 From: Richard Weinberger Date: Sun, 25 Oct 2015 19:54:33 +0100 Subject: um: Store syscall number after syscall_trace_enter() To support changing syscall numbers we have to store it after syscall_trace_enter(). Signed-off-by: Richard Weinberger --- arch/um/os-Linux/skas/process.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'arch/um/os-Linux') diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c index 3dddedba3a07..d38f4952d748 100644 --- a/arch/um/os-Linux/skas/process.c +++ b/arch/um/os-Linux/skas/process.c @@ -137,9 +137,6 @@ static void handle_trap(int pid, struct uml_pt_regs *regs, if ((UPT_IP(regs) >= STUB_START) && (UPT_IP(regs) < STUB_END)) fatal_sigsegv(); - /* Mark this as a syscall */ - UPT_SYSCALL_NR(regs) = PT_SYSCALL_NR(regs->gp); - if (!local_using_sysemu) { err = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_NR_OFFSET, @@ -174,6 +171,13 @@ static void handle_trap(int pid, struct uml_pt_regs *regs, handle_syscall(regs); } +int get_syscall(struct uml_pt_regs *regs) +{ + UPT_SYSCALL_NR(regs) = PT_SYSCALL_NR(regs->gp); + + return UPT_SYSCALL_NR(regs); +} + extern char __syscall_stub_start[]; static int userspace_tramp(void *stack) -- cgit v1.2.3