[PATCH v6 17/27] parisc: define syscall_get_error()

* [PATCH v6 17/27] parisc: define syscall_get_error()
       [not found] <20181213171833.GA5240@altlinux.org>
@ 2018-12-13 17:23 ` Dmitry V. Levin
  2018-12-13 17:24 ` [PATCH v6 24/27] syscall_get_arch: add "struct task_struct *" argument Dmitry V. Levin
  1 sibling, 0 replies; 2+ messages in thread
From: Dmitry V. Levin @ 2018-12-13 17:23 UTC (permalink / raw)
  To: James E.J. Bottomley, Helge Deller, Oleg Nesterov, Andy Lutomirski
  Cc: Elvira Khabirova, Eugene Syromyatnikov, linux-parisc, linux-kernel

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.

Cc: James E.J. Bottomley <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
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-parisc@vger.kernel.org
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
---

Notes:
    v6: unchanged
    v5: initial revision

 arch/parisc/include/asm/syscall.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/parisc/include/asm/syscall.h b/arch/parisc/include/asm/syscall.h
index 8bff1a58c97f..477511ff7546 100644
--- a/arch/parisc/include/asm/syscall.h
+++ b/arch/parisc/include/asm/syscall.h
@@ -43,6 +43,13 @@ static inline void syscall_get_arguments(struct task_struct *tsk,
 	}
 }
 
+static inline long syscall_get_error(struct task_struct *task,
+				     struct pt_regs *regs)
+{
+	unsigned long error = regs->gr[28];
+	return IS_ERR_VALUE(error) ? error : 0;
+}
+
 static inline long syscall_get_return_value(struct task_struct *task,
 						struct pt_regs *regs)
 {
-- 
ldv

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