diff mbox series

[v7,14/22] mips: define syscall_get_error()

Message ID 20190107025410.GN1207@altlinux.org (mailing list archive)
State Superseded
Headers show
Series None | expand

Commit Message

Dmitry V. Levin Jan. 7, 2019, 2:54 a.m. UTC 
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: 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: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: linux-mips@vger.kernel.org
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
---

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

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

Patch

diff --git a/arch/mips/include/asm/syscall.h b/arch/mips/include/asm/syscall.h
index 6cf8ffb5367e..04ab927ff47d 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)
 {