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hexagon: define syscall_get_error() and syscall_get_return_value()

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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>
This commit is contained in:
Dmitry V. Levin 2019-07-16 16:29:28 -07:00 committed by Linus Torvalds
parent 33644b95eb
commit 6c132dd6d4
1 changed files with 14 additions and 0 deletions
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14
arch/hexagon/include/asm/syscall.h
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@ -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;