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Commit b837e97f authored by Hans-Christian Egtvedt's avatar Hans-Christian Egtvedt
Browse files

avr32: wire up copy_file_range syscall 



This patch wires up the new copy_file_range syscall on AVR32.

On AVR32, all parameters beyond the 5th are passed on the stack. System
calls don't use the stack -- they borrow a callee-saved register
instead. This means that syscalls that take 6 parameters must be called
through a stub that pushes the last parameter on the stack.

Signed-off-by: default avatarHans-Christian Noren Egtvedt <egtvedt@samfundet.no>
parent b562e44f

arch/avr32/include/uapi/asm/unistd.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -337,5 +337,6 @@ 
#define __NR_userfaultfd	322

#define __NR_userfaultfd	322

#define __NR_membarrier		323

#define __NR_membarrier		323

#define __NR_mlock2		324

#define __NR_mlock2		324

#define __NR_copy_file_range    325





#endif /* _UAPI__ASM_AVR32_UNISTD_H */
 
#endif /* _UAPI__ASM_AVR32_UNISTD_H */

arch/avr32/kernel/syscall-stubs.S

+9 −0
Original line number Original line Diff line number Diff line
@@ -124,3 +124,12 @@ __sys_process_vm_writev: 
	call	sys_process_vm_writev

	call	sys_process_vm_writev

	sub	sp, -4

	sub	sp, -4

	popm	pc

	popm	pc



	.global __sys_copy_file_range

	.type	__sys_copy_file_range,@function

__sys_copy_file_range:

	pushm	lr

	st.w	--sp, ARG6

	call	sys_copy_file_range

	sub	sp, -4

	popm	pc

arch/avr32/kernel/syscall_table.S

+1 −0
Original line number Original line Diff line number Diff line
@@ -338,4 +338,5 @@ sys_call_table: 
	.long	sys_userfaultfd

	.long	sys_userfaultfd

	.long	sys_membarrier

	.long	sys_membarrier

	.long	sys_mlock2

	.long	sys_mlock2

	.long   __sys_copy_file_range   /* 325 */

	.long	sys_ni_syscall		/* r8 is saturated at nr_syscalls */
 
	.long	sys_ni_syscall		/* r8 is saturated at nr_syscalls */