lkml.org 
[lkml]   [2019]   [Jan]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH v7 13/22] m68k: add asm/syscall.h
syscall_get_* functions are required to be implemented on all
architectures in order to extend the generic ptrace API with
PTRACE_GET_SYSCALL_INFO request.

This introduces asm/syscall.h on m68k implementing all 5 syscall_get_*
functions as documented in asm-generic/syscall.h: syscall_get_nr,
syscall_get_arguments, syscall_get_error, syscall_get_return_value,
and syscall_get_arch.

Acked-by: Paul Moore <paul@paul-moore.com> # audit related parts
Cc: Geert Uytterhoeven <geert@linux-m68k.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-m68k@lists.linux-m68k.org
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
---

Notes:
v7: added Acked-by
v6: added missing includes, use asm-generic/syscall.h
v5: added syscall_get_nr, syscall_get_arguments, syscall_get_error,
and syscall_get_return_value
v1: added syscall_get_arch

arch/m68k/include/asm/syscall.h | 42 +++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
create mode 100644 arch/m68k/include/asm/syscall.h

diff --git a/arch/m68k/include/asm/syscall.h b/arch/m68k/include/asm/syscall.h
new file mode 100644
index 000000000000..c87b14417753
--- /dev/null
+++ b/arch/m68k/include/asm/syscall.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_M68K_SYSCALL_H
+#define _ASM_M68K_SYSCALL_H
+
+#include <asm/ptrace.h>
+#include <asm-generic/syscall.h>
+#include <linux/err.h>
+#include <uapi/linux/audit.h>
+
+static inline int
+syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
+{
+ return regs->orig_d0;
+}
+
+static inline void
+__syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
+ unsigned int i, unsigned int n, unsigned long *args)
+{
+ BUILD_BUG_ON(sizeof(regs->d1) != sizeof(args[0]));
+ memcpy(args, &regs->d1 + i, n * sizeof(args[0]));
+}
+
+static inline long
+syscall_get_error(struct task_struct *task, struct pt_regs *regs)
+{
+ return IS_ERR_VALUE(regs->d0) ? regs->d0 : 0;
+}
+
+static inline long
+syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
+{
+ return regs->d0;
+}
+
+static inline int
+syscall_get_arch(void)
+{
+ return AUDIT_ARCH_M68K;
+}
+
+#endif /* _ASM_M68K_SYSCALL_H */
--
ldv
\
 
 \ /
  Last update: 2019-01-07 03:54    [W:0.022 / U:2.192 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site