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| author | Simon Schuster <schuster.simon@siemens-energy.com> | 2025-09-01 16:09:53 +0300 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-09-01 16:31:34 +0300 |
| commit | c6ac444ff20ce301020a41e35f1942c6524e0864 (patch) | |
| tree | aa38b7d6038de1c1377d3182244d6f11e721b703 | |
| parent | bbc46b23af5bb934cd1cf066ef4342cee457a24e (diff) | |
| download | linux-c6ac444ff20ce301020a41e35f1942c6524e0864.tar.xz | |
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: Simon Schuster <schuster.simon@siemens-energy.com>
Link: https://lore.kernel.org/20250901-nios2-implement-clone3-v2-4-53fcf5577d57@siemens-energy.com
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
| -rw-r--r-- | arch/nios2/include/asm/syscalls.h | 1 | ||||
| -rw-r--r-- | arch/nios2/include/asm/unistd.h | 2 | ||||
| -rw-r--r-- | arch/nios2/kernel/entry.S | 6 | ||||
| -rw-r--r-- | arch/nios2/kernel/syscall_table.c | 1 |
4 files changed, 8 insertions, 2 deletions
diff --git a/arch/nios2/include/asm/syscalls.h b/arch/nios2/include/asm/syscalls.h index b4d4ed3bf9c8..0e214b0a0ac8 100644 --- a/arch/nios2/include/asm/syscalls.h +++ b/arch/nios2/include/asm/syscalls.h @@ -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> diff --git a/arch/nios2/include/asm/unistd.h b/arch/nios2/include/asm/unistd.h index 1146e56473c5..213f6de3cf7b 100644 --- a/arch/nios2/include/asm/unistd.h +++ b/arch/nios2/include/asm/unistd.h @@ -7,6 +7,4 @@ #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SET_GET_RLIMIT -#define __ARCH_BROKEN_SYS_CLONE3 - #endif diff --git a/arch/nios2/kernel/entry.S b/arch/nios2/kernel/entry.S index 99f0a65e6234..dd40dfd908e5 100644 --- a/arch/nios2/kernel/entry.S +++ b/arch/nios2/kernel/entry.S @@ -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 diff --git a/arch/nios2/kernel/syscall_table.c b/arch/nios2/kernel/syscall_table.c index 434694067d8f..c99818aac9e1 100644 --- a/arch/nios2/kernel/syscall_table.c +++ b/arch/nios2/kernel/syscall_table.c @@ -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, |