Commit 17fc7b8f authored by Dmitry V. Levin's avatar Dmitry V. Levin Committed by Andrew Morton
Browse files

syscall.h: add syscall_set_arguments() 

This function is going to be needed on all HAVE_ARCH_TRACEHOOK
architectures to implement PTRACE_SET_SYSCALL_INFO API.

This partially reverts commit 7962c2ed ("arch: remove unused function
syscall_set_arguments()") by reusing some of old syscall_set_arguments()
implementations.

[nathan@kernel.org: fix compile time fortify checks]
  Link: https://lkml.kernel.org/r/20250408213131.GA2872426@ax162
Link: https://lkml.kernel.org/r/20250303112009.GC24170@strace.io


Signed-off-by: default avatarDmitry V. Levin <ldv@strace.io>
Signed-off-by: default avatarNathan Chancellor <nathan@kernel.org>
Tested-by: default avatarCharlie Jenkins <charlie@rivosinc.com>
Reviewed-by: default avatarCharlie Jenkins <charlie@rivosinc.com>
Acked-by: Helge Deller <deller@gmx.de> # parisc
Reviewed-by: Maciej W. Rozycki <macro@orcam.me.uk>	[mips]
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexey Gladkov (Intel) <legion@kernel.org>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: anton ivanov <anton.ivanov@cambridgegreys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Betkov <bp@alien8.de>
Cc: Brian Cain <bcain@quicinc.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Christian Zankel <chris@zankel.net>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Davide Berardi <berardi.dav@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Eugene Syromiatnikov <esyr@redhat.com>
Cc: Eugene Syromyatnikov <evgsyr@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Naveen N Rao <naveen@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Renzo Davoi <renzo@cs.unibo.it>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russel King <linux@armlinux.org.uk>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@kernel.org>
Cc: WANG Xuerui <kernel@xen0n.name>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 87a929ae

arch/arc/include/asm/syscall.h

+14 −0
Original line number Diff line number Diff line
@@ -67,6 +67,20 @@ syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, 
	}

}



static inline void

syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,

		      unsigned long *args)

{

	unsigned long *inside_ptregs = &regs->r0;

	unsigned int n = 6;

	unsigned int i = 0;



	while (n--) {

		*inside_ptregs = args[i++];

		inside_ptregs--;

	}

}



static inline int

syscall_get_arch(struct task_struct *task)

{

arch/arm/include/asm/syscall.h

+13 −0
Original line number Diff line number Diff line
@@ -80,6 +80,19 @@ static inline void syscall_get_arguments(struct task_struct *task, 
	memcpy(args, &regs->ARM_r0 + 1, 5 * sizeof(args[0]));

}



static inline void syscall_set_arguments(struct task_struct *task,

					 struct pt_regs *regs,

					 const unsigned long *args)

{

	memcpy(&regs->ARM_r0, args, 6 * sizeof(args[0]));

	/*

	 * Also copy the first argument into ARM_ORIG_r0

	 * so that syscall_get_arguments() would return it

	 * instead of the previous value.

	 */

	regs->ARM_ORIG_r0 = regs->ARM_r0;

}



static inline int syscall_get_arch(struct task_struct *task)

{

	/* ARM tasks don't change audit architectures on the fly. */

arch/arm64/include/asm/syscall.h

+13 −0
Original line number Diff line number Diff line
@@ -73,6 +73,19 @@ static inline void syscall_get_arguments(struct task_struct *task, 
	memcpy(args, &regs->regs[1], 5 * sizeof(args[0]));

}



static inline void syscall_set_arguments(struct task_struct *task,

					 struct pt_regs *regs,

					 const unsigned long *args)

{

	memcpy(&regs->regs[0], args, 6 * sizeof(args[0]));

	/*

	 * Also copy the first argument into orig_x0

	 * so that syscall_get_arguments() would return it

	 * instead of the previous value.

	 */

	regs->orig_x0 = regs->regs[0];

}



/*

 * We don't care about endianness (__AUDIT_ARCH_LE bit) here because

 * AArch64 has the same system calls both on little- and big- endian.

arch/csky/include/asm/syscall.h

+13 −0
Original line number Diff line number Diff line
@@ -59,6 +59,19 @@ syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, 
	memcpy(args, &regs->a1, 5 * sizeof(args[0]));

}



static inline void

syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,

		      const unsigned long *args)

{

	memcpy(&regs->a0, args, 6 * sizeof(regs->a0));

	/*

	 * Also copy the first argument into orig_a0

	 * so that syscall_get_arguments() would return it

	 * instead of the previous value.

	 */

	regs->orig_a0 = regs->a0;

}



static inline int

syscall_get_arch(struct task_struct *task)

{

arch/hexagon/include/asm/syscall.h

+7 −0
Original line number Diff line number Diff line
@@ -33,6 +33,13 @@ static inline void syscall_get_arguments(struct task_struct *task, 
	memcpy(args, &(&regs->r00)[0], 6 * sizeof(args[0]));

}



static inline void syscall_set_arguments(struct task_struct *task,

					 struct pt_regs *regs,

					 unsigned long *args)

{

	memcpy(&(&regs->r00)[0], args, 6 * sizeof(args[0]));

}



static inline long syscall_get_error(struct task_struct *task,

				     struct pt_regs *regs)

{