Commit c6ac444f authored by Simon Schuster's avatar Simon Schuster Committed by Christian Brauner
Browse files

nios2: implement architecture-specific portion of sys_clone3 



This commit adds the sys_clone3 entry point for nios2. An
architecture-specific wrapper (__sys_clone3) is required to save and
restore additional registers to the kernel stack via SAVE_SWITCH_STACK
and RESTORE_SWITCH_STACK.

Signed-off-by: default avatarSimon Schuster <schuster.simon@siemens-energy.com>
Link: https://lore.kernel.org/20250901-nios2-implement-clone3-v2-4-53fcf5577d57@siemens-energy.com


Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent bbc46b23

arch/nios2/include/asm/syscalls.h

+1 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 


int sys_cacheflush(unsigned long addr, unsigned long len,

				unsigned int op);

asmlinkage long __sys_clone3(struct clone_args __user *uargs, size_t size);



#include <asm-generic/syscalls.h>

arch/nios2/include/asm/unistd.h

+0 −2
Original line number Diff line number Diff line
@@ -7,6 +7,4 @@ 
#define __ARCH_WANT_STAT64

#define __ARCH_WANT_SET_GET_RLIMIT



#define __ARCH_BROKEN_SYS_CLONE3



#endif

arch/nios2/kernel/entry.S

+6 −0
Original line number Diff line number Diff line
@@ -403,6 +403,12 @@ ENTRY(sys_clone) 
	addi    sp, sp, 4

	RESTORE_SWITCH_STACK

	ret

/* long syscall(SYS_clone3, struct clone_args *cl_args, size_t size); */

ENTRY(__sys_clone3)

	SAVE_SWITCH_STACK

	call	sys_clone3

	RESTORE_SWITCH_STACK

	ret



ENTRY(sys_rt_sigreturn)

	SAVE_SWITCH_STACK

arch/nios2/kernel/syscall_table.c

+1 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#define __SYSCALL_WITH_COMPAT(nr, native, compat)        __SYSCALL(nr, native)



#define sys_mmap2 sys_mmap_pgoff

#define sys_clone3 __sys_clone3



void *sys_call_table[__NR_syscalls] = {

	[0 ... __NR_syscalls-1] = sys_ni_syscall,