diff options
Diffstat (limited to 'arch/arm64/kernel/sys32.S')
| -rw-r--r-- | arch/arm64/kernel/sys32.S | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/arch/arm64/kernel/sys32.S b/arch/arm64/kernel/sys32.S new file mode 100644 index 000000000000..5e4dc93cc31f --- /dev/null +++ b/arch/arm64/kernel/sys32.S @@ -0,0 +1,282 @@ +/* + * Compat system call wrappers + * + * Copyright (C) 2012 ARM Ltd. + * Authors: Will Deacon <will.deacon@arm.com> + * Catalin Marinas <catalin.marinas@arm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/linkage.h> + +#include <asm/assembler.h> +#include <asm/asm-offsets.h> + +/* + * System call wrappers for the AArch32 compatibility layer. + */ +compat_sys_fork_wrapper: + mov x0, sp + b compat_sys_fork +ENDPROC(compat_sys_fork_wrapper) + +compat_sys_vfork_wrapper: + mov x0, sp + b compat_sys_vfork +ENDPROC(compat_sys_vfork_wrapper) + +compat_sys_execve_wrapper: + mov x3, sp + b compat_sys_execve +ENDPROC(compat_sys_execve_wrapper) + +compat_sys_clone_wrapper: + mov x5, sp + b compat_sys_clone +ENDPROC(compat_sys_clone_wrapper) + +compat_sys_sigreturn_wrapper: + mov x0, sp + mov x27, #0 // prevent syscall restart handling (why) + b compat_sys_sigreturn +ENDPROC(compat_sys_sigreturn_wrapper) + +compat_sys_rt_sigreturn_wrapper: + mov x0, sp + mov x27, #0 // prevent syscall restart handling (why) + b compat_sys_rt_sigreturn +ENDPROC(compat_sys_rt_sigreturn_wrapper) + +compat_sys_sigaltstack_wrapper: + ldr x2, [sp, #S_COMPAT_SP] + b compat_do_sigaltstack +ENDPROC(compat_sys_sigaltstack_wrapper) + +compat_sys_statfs64_wrapper: + mov w3, #84 + cmp w1, #88 + csel w1, w3, w1, eq + b compat_sys_statfs64 +ENDPROC(compat_sys_statfs64_wrapper) + +compat_sys_fstatfs64_wrapper: + mov w3, #84 + cmp w1, #88 + csel w1, w3, w1, eq + b compat_sys_fstatfs64 +ENDPROC(compat_sys_fstatfs64_wrapper) + +/* + * Wrappers for AArch32 syscalls that either take 64-bit parameters + * in registers or that take 32-bit parameters which require sign + * extension. + */ +compat_sys_lseek_wrapper: + sxtw x1, w1 + b sys_lseek +ENDPROC(compat_sys_lseek_wrapper) + +compat_sys_pread64_wrapper: + orr x3, x4, x5, lsl #32 + b sys_pread64 +ENDPROC(compat_sys_pread64_wrapper) + +compat_sys_pwrite64_wrapper: + orr x3, x4, x5, lsl #32 + b sys_pwrite64 +ENDPROC(compat_sys_pwrite64_wrapper) + +compat_sys_truncate64_wrapper: + orr x1, x2, x3, lsl #32 + b sys_truncate +ENDPROC(compat_sys_truncate64_wrapper) + +compat_sys_ftruncate64_wrapper: + orr x1, x2, x3, lsl #32 + b sys_ftruncate +ENDPROC(compat_sys_ftruncate64_wrapper) + +compat_sys_readahead_wrapper: + orr x1, x2, x3, lsl #32 + mov w2, w4 + b sys_readahead +ENDPROC(compat_sys_readahead_wrapper) + +compat_sys_lookup_dcookie: + orr x0, x0, x1, lsl #32 + mov w1, w2 + mov w2, w3 + b sys_lookup_dcookie +ENDPROC(compat_sys_lookup_dcookie) + +compat_sys_fadvise64_64_wrapper: + mov w6, w1 + orr x1, x2, x3, lsl #32 + orr x2, x4, x5, lsl #32 + mov w3, w6 + b sys_fadvise64_64 +ENDPROC(compat_sys_fadvise64_64_wrapper) + +compat_sys_sync_file_range2_wrapper: + orr x2, x2, x3, lsl #32 + orr x3, x4, x5, lsl #32 + b sys_sync_file_range2 +ENDPROC(compat_sys_sync_file_range2_wrapper) + +compat_sys_fallocate_wrapper: + orr x2, x2, x3, lsl #32 + orr x3, x4, x5, lsl #32 + b sys_fallocate +ENDPROC(compat_sys_fallocate_wrapper) + +compat_sys_fanotify_mark_wrapper: + orr x2, x2, x3, lsl #32 + mov w3, w4 + mov w4, w5 + b sys_fanotify_mark +ENDPROC(compat_sys_fanotify_mark_wrapper) + +/* + * Use the compat system call wrappers. + */ +#define sys_fork compat_sys_fork_wrapper +#define sys_open compat_sys_open +#define sys_execve compat_sys_execve_wrapper +#define sys_lseek compat_sys_lseek_wrapper +#define sys_mount compat_sys_mount +#define sys_ptrace compat_sys_ptrace +#define sys_times compat_sys_times +#define sys_ioctl compat_sys_ioctl +#define sys_fcntl compat_sys_fcntl +#define sys_ustat compat_sys_ustat +#define sys_sigaction compat_sys_sigaction +#define sys_sigsuspend compat_sys_sigsuspend +#define sys_sigpending compat_sys_sigpending +#define sys_setrlimit compat_sys_setrlimit +#define sys_getrusage compat_sys_getrusage +#define sys_gettimeofday compat_sys_gettimeofday +#define sys_settimeofday compat_sys_settimeofday +#define sys_statfs compat_sys_statfs +#define sys_fstatfs compat_sys_fstatfs +#define sys_setitimer compat_sys_setitimer +#define sys_getitimer compat_sys_getitimer +#define sys_newstat compat_sys_newstat +#define sys_newlstat compat_sys_newlstat +#define sys_newfstat compat_sys_newfstat +#define sys_wait4 compat_sys_wait4 +#define sys_sysinfo compat_sys_sysinfo +#define sys_sigreturn compat_sys_sigreturn_wrapper +#define sys_clone compat_sys_clone_wrapper +#define sys_adjtimex compat_sys_adjtimex +#define sys_sigprocmask compat_sys_sigprocmask +#define sys_getdents compat_sys_getdents +#define sys_select compat_sys_select +#define sys_readv compat_sys_readv +#define sys_writev compat_sys_writev +#define sys_sysctl compat_sys_sysctl +#define sys_sched_rr_get_interval compat_sys_sched_rr_get_interval +#define sys_nanosleep compat_sys_nanosleep +#define sys_rt_sigreturn compat_sys_rt_sigreturn_wrapper +#define sys_rt_sigaction compat_sys_rt_sigaction +#define sys_rt_sigprocmask compat_sys_rt_sigprocmask +#define sys_rt_sigpending compat_sys_rt_sigpending +#define sys_rt_sigtimedwait compat_sys_rt_sigtimedwait +#define sys_rt_sigqueueinfo compat_sys_rt_sigqueueinfo +#define sys_rt_sigsuspend compat_sys_rt_sigsuspend +#define sys_pread64 compat_sys_pread64_wrapper +#define sys_pwrite64 compat_sys_pwrite64_wrapper +#define sys_sigaltstack compat_sys_sigaltstack_wrapper +#define sys_sendfile compat_sys_sendfile +#define sys_vfork compat_sys_vfork_wrapper +#define sys_getrlimit compat_sys_getrlimit +#define sys_mmap2 sys_mmap_pgoff +#define sys_truncate64 compat_sys_truncate64_wrapper +#define sys_ftruncate64 compat_sys_ftruncate64_wrapper +#define sys_getdents64 compat_sys_getdents64 +#define sys_fcntl64 compat_sys_fcntl64 +#define sys_readahead compat_sys_readahead_wrapper +#define sys_futex compat_sys_futex +#define sys_sched_setaffinity compat_sys_sched_setaffinity +#define sys_sched_getaffinity compat_sys_sched_getaffinity +#define sys_io_setup compat_sys_io_setup +#define sys_io_getevents compat_sys_io_getevents +#define sys_io_submit compat_sys_io_submit +#define sys_lookup_dcookie compat_sys_lookup_dcookie +#define sys_timer_create compat_sys_timer_create +#define sys_timer_settime compat_sys_timer_settime +#define sys_timer_gettime compat_sys_timer_gettime +#define sys_clock_settime compat_sys_clock_settime +#define sys_clock_gettime compat_sys_clock_gettime +#define sys_clock_getres compat_sys_clock_getres +#define sys_clock_nanosleep compat_sys_clock_nanosleep +#define sys_statfs64 compat_sys_statfs64_wrapper +#define sys_fstatfs64 compat_sys_fstatfs64_wrapper +#define sys_utimes compat_sys_utimes +#define sys_fadvise64_64 compat_sys_fadvise64_64_wrapper +#define sys_mq_open compat_sys_mq_open +#define sys_mq_timedsend compat_sys_mq_timedsend +#define sys_mq_timedreceive compat_sys_mq_timedreceive +#define sys_mq_notify compat_sys_mq_notify +#define sys_mq_getsetattr compat_sys_mq_getsetattr +#define sys_waitid compat_sys_waitid +#define sys_recv compat_sys_recv +#define sys_recvfrom compat_sys_recvfrom +#define sys_setsockopt compat_sys_setsockopt +#define sys_getsockopt compat_sys_getsockopt +#define sys_sendmsg compat_sys_sendmsg +#define sys_recvmsg compat_sys_recvmsg +#define sys_semctl compat_sys_semctl +#define sys_msgsnd compat_sys_msgsnd +#define sys_msgrcv compat_sys_msgrcv +#define sys_msgctl compat_sys_msgctl +#define sys_shmat compat_sys_shmat +#define sys_shmctl compat_sys_shmctl +#define sys_keyctl compat_sys_keyctl +#define sys_semtimedop compat_sys_semtimedop +#define sys_mbind compat_sys_mbind +#define sys_get_mempolicy compat_sys_get_mempolicy +#define sys_set_mempolicy compat_sys_set_mempolicy +#define sys_openat compat_sys_openat +#define sys_futimesat compat_sys_futimesat +#define sys_pselect6 compat_sys_pselect6 +#define sys_ppoll compat_sys_ppoll +#define sys_set_robust_list compat_sys_set_robust_list +#define sys_get_robust_list compat_sys_get_robust_list +#define sys_sync_file_range2 compat_sys_sync_file_range2_wrapper +#define sys_vmsplice compat_sys_vmsplice +#define sys_move_pages compat_sys_move_pages +#define sys_epoll_pwait compat_sys_epoll_pwait +#define sys_kexec_load compat_sys_kexec_load +#define sys_utimensat compat_sys_utimensat +#define sys_signalfd compat_sys_signalfd +#define sys_fallocate compat_sys_fallocate_wrapper +#define sys_timerfd_settime compat_sys_timerfd_settime +#define sys_timerfd_gettime compat_sys_timerfd_gettime +#define sys_signalfd4 compat_sys_signalfd4 +#define sys_preadv compat_sys_preadv +#define sys_pwritev compat_sys_pwritev +#define sys_rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo +#define sys_recvmmsg compat_sys_recvmmsg +#define sys_fanotify_mark compat_sys_fanotify_mark_wrapper + +#undef __SYSCALL +#define __SYSCALL(x, y) .quad y // x +#define __SYSCALL_COMPAT + +/* + * The system calls table must be 4KB aligned. + */ + .align 12 +ENTRY(compat_sys_call_table) +#include <asm/unistd.h> |