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