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/kernel/skas/syscall.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) (limited to 'arch/um/kernel') diff --git a/arch/um/kernel/skas/syscall.c b/arch/um/kernel/skas/syscall.c index d9ec0068b623..64a8fe589d6f 100644 --- a/arch/um/kernel/skas/syscall.c +++ b/arch/um/kernel/skas/syscall.c @@ -8,6 +8,7 @@ #include #include #include +#include extern int syscall_table_size; #define NR_SYSCALLS (syscall_table_size / sizeof(void *)) @@ -23,16 +24,8 @@ void handle_syscall(struct uml_pt_regs *r) goto out; } - /* - * This should go in the declaration of syscall, but when I do that, - * strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing - * children at all, sometimes hanging when bash doesn't see the first - * ls exit. - * The assembly looks functionally the same to me. This is - * gcc version 4.0.1 20050727 (Red Hat 4.0.1-5) - * in case it's a compiler bug. - */ - syscall = UPT_SYSCALL_NR(r); + syscall = get_syscall(r); + if ((syscall >= NR_SYSCALLS) || (syscall < 0)) result = -ENOSYS; else result = EXECUTE_SYSCALL(syscall, regs); -- cgit 1.4.1