diff options
Diffstat (limited to 'arch/x86/entry/syscall_x32.c')
| -rw-r--r-- | arch/x86/entry/syscall_x32.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/x86/entry/syscall_x32.c b/arch/x86/entry/syscall_x32.c new file mode 100644 index 000000000..f2fe0a33b --- /dev/null +++ b/arch/x86/entry/syscall_x32.c @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: GPL-2.0 +/* System call table for x32 ABI. */ + +#include <linux/linkage.h> +#include <linux/sys.h> +#include <linux/cache.h> +#include <linux/syscalls.h> +#include <asm/unistd.h> +#include <asm/syscall.h> + +/* + * Reuse the 64-bit entry points for the x32 versions that occupy different + * slots in the syscall table. + */ +#define __x32_sys_readv __x64_sys_readv +#define __x32_sys_writev __x64_sys_writev +#define __x32_sys_getsockopt __x64_sys_getsockopt +#define __x32_sys_setsockopt __x64_sys_setsockopt +#define __x32_sys_vmsplice __x64_sys_vmsplice +#define __x32_sys_process_vm_readv __x64_sys_process_vm_readv +#define __x32_sys_process_vm_writev __x64_sys_process_vm_writev + +#define __SYSCALL_64(nr, sym) + +#define __SYSCALL_X32(nr, sym) extern long __x32_##sym(const struct pt_regs *); +#define __SYSCALL_COMMON(nr, sym) extern long __x64_##sym(const struct pt_regs *); +#include <asm/syscalls_64.h> +#undef __SYSCALL_X32 +#undef __SYSCALL_COMMON + +#define __SYSCALL_X32(nr, sym) [nr] = __x32_##sym, +#define __SYSCALL_COMMON(nr, sym) [nr] = __x64_##sym, + +asmlinkage const sys_call_ptr_t x32_sys_call_table[__NR_x32_syscall_max+1] = { + /* + * Smells like a compiler bug -- it doesn't work + * when the & below is removed. + */ + [0 ... __NR_x32_syscall_max] = &__x64_sys_ni_syscall, +#include <asm/syscalls_64.h> +}; |