[PATCH linux-next v10 3/7] mips: define syscall_get_error()

Dmitry V. Levin
2019-04-15T23:44:26Z

syscall_get_error() is required to be implemented on all
architectures in addition to already implemented syscall_get_nr(),
syscall_get_arguments(), syscall_get_return_value(), and
syscall_get_arch() functions in order to extend the generic
ptrace API with PTRACE_GET_SYSCALL_INFO request.

Acked-by: Paul Burton <paul.burton@mips.com>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: linux-mips@vger.kernel.org
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
---

Notes:
v10: unchanged
v9: unchanged
v8: unchanged
v7: added Acked-by
v6: unchanged
v5: initial revision

arch/mips/include/asm/syscall.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/mips/include/asm/syscall.h b/arch/mips/include/asm/syscall.h
index acf80ae0a430..83bb439597d8 100644
--- a/arch/mips/include/asm/syscall.h
+++ b/arch/mips/include/asm/syscall.h
@@ -89,6 +89,12 @@ static inline unsigned long mips_get_syscall_arg(unsigned long *arg,
unreachable();
}

+static inline long syscall_get_error(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return regs->regs[7] ? -regs->regs[2] : 0;
+}
+
static inline long syscall_get_return_value(struct task_struct *task,
struct pt_regs *regs)
{
--
ldv