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authorDmitry V. Levin <ldv@altlinux.org>2019-07-17 02:29:28 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-17 05:23:24 +0300
commit6c132dd6d4020ab37a842be93125d3f96432d01d (patch)
treea8fd4abd4bcf307895f9b03943f5db064a6c7246 /arch/hexagon/include
parent33644b95eb342201511fc951d8fcd10362bd435b (diff)
downloadlinux-6c132dd6d4020ab37a842be93125d3f96432d01d.tar.xz
hexagon: define syscall_get_error() and syscall_get_return_value()
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 adds remaining 2 syscall_get_* functions as documented in asm-generic/syscall.h: syscall_get_error and syscall_get_return_value. Link: http://lkml.kernel.org/r/20190510152756.GB28558@altlinux.org Signed-off-by: Dmitry V. Levin <ldv@altlinux.org> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Elvira Khabirova <lineprinter@altlinux.org> Cc: Eugene Syromyatnikov <esyr@redhat.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greentime Hu <greentime@andestech.com> Cc: Helge Deller <deller@gmx.de> [parisc] Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: James Hogan <jhogan@kernel.org> Cc: kbuild test robot <lkp@intel.com> Cc: Kees Cook <keescook@chromium.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Vincent Chen <deanbo422@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/hexagon/include')
-rw-r--r--arch/hexagon/include/asm/syscall.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/hexagon/include/asm/syscall.h b/arch/hexagon/include/asm/syscall.h
index 4f054b1ddef5..f6e454f18038 100644
--- a/arch/hexagon/include/asm/syscall.h
+++ b/arch/hexagon/include/asm/syscall.h
@@ -9,6 +9,8 @@
#define _ASM_HEXAGON_SYSCALL_H
#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,
@@ -31,6 +33,18 @@ 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)
{
return AUDIT_ARCH_HEXAGON;