diff options
| author |   Mickaël Salaün <mic@digikod.net> | 2015-12-29 21:35:44 +0100 |
|---|---|---|
| committer |   Richard Weinberger <richard@nod.at> | 2016-01-10 21:49:48 +0100 |
| commit | e04c989eb785af61d2895d76d38c09166296f9c5 (patch) | |
| tree | a4698bceed0851ec151539c275e5d615da506d36 /arch/um/os-Linux | |
| parent | um: link with -lpthread (diff) | |
| download | linux-dev-e04c989eb785af61d2895d76d38c09166296f9c5.tar.xz linux-dev-e04c989eb785af61d2895d76d38c09166296f9c5.zip | |
um: Fix ptrace GETREGS/SETREGS bugs
This fix two related bugs:
* PTRACE_GETREGS doesn't get the right orig_ax (syscall) value
* PTRACE_SETREGS can't set the orig_ax value (erased by initial value)
Get rid of the now useless and error-prone get_syscall().
Fix inconsistent behavior in the ptrace implementation for i386 when
updating orig_eax automatically update the syscall number as well. This
is now updated in handle_syscall().
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Will Drewry <wad@chromium.org>
Cc: Thomas Meyer <thomas@m3y3r.de>
Cc: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Cc: Anton Ivanov <aivanov@brocade.com>
Cc: Meredydd Luff <meredydd@senatehouse.org>
Cc: David Drysdale <drysdale@google.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Acked-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'arch/um/os-Linux')
| -rw-r--r-- | arch/um/os-Linux/skas/process.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c index b856c66ebd3a..23025d645160 100644 --- a/arch/um/os-Linux/skas/process.c +++ b/arch/um/os-Linux/skas/process.c @@ -172,13 +172,6 @@ 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) |