[PATCH v11 2/7] hexagon: define syscall_get_error() and syscall_get_return_value()

From: Dmitry V. Levin
Date: Fri May 10 2019 - 11:29:21 EST

syscall_get_* functions are required to be implemented on all
architectures in order to extend the generic ptrace API with

This adds remaining 2 syscall_get_* functions as documented in
asm-generic/syscall.h: syscall_get_error and syscall_get_return_value.

Cc: Richard Kuo <rkuo@xxxxxxxxxxxxxx>
Cc: Elvira Khabirova <lineprinter@xxxxxxxxxxxx>
Cc: Eugene Syromyatnikov <esyr@xxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: linux-hexagon@xxxxxxxxxxxxxxx
Signed-off-by: Dmitry V. Levin <ldv@xxxxxxxxxxxx>

Richard, this patch is waiting for ACK since November.

v11: unchanged
v10: unchanged
v9: unchanged
v8: moved syscall_get_arch to separate audit patchset
v7: unchanged
v6: added missing includes
v5: added syscall_get_error and syscall_get_return_value
v4: unchanged
v3: unchanged
v2: unchanged

arch/hexagon/include/asm/syscall.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/arch/hexagon/include/asm/syscall.h b/arch/hexagon/include/asm/syscall.h
index dab26a71f577..0f28a6a39c3a 100644
--- a/arch/hexagon/include/asm/syscall.h
+++ b/arch/hexagon/include/asm/syscall.h
@@ -22,6 +22,8 @@

#include <uapi/linux/audit.h>
+#include <linux/err.h>
+#include <asm/ptrace.h>

typedef long (*syscall_fn)(unsigned long, unsigned long,
unsigned long, unsigned long,
@@ -44,6 +46,18 @@ static inline void syscall_get_arguments(struct task_struct *task,
memcpy(args, &(&regs->r00)[0], 6 * sizeof(args[0]));

+static inline long syscall_get_error(struct task_struct *task,
+ struct pt_regs *regs)
+ return IS_ERR_VALUE(regs->r00) ? regs->r00 : 0;
+static inline long syscall_get_return_value(struct task_struct *task,
+ struct pt_regs *regs)
+ return regs->r00;
static inline int syscall_get_arch(struct task_struct *task)