forked from luck/tmp_suning_uos_patched
3dd681d944
This patch adds support for 32-bit applications. The vectors page is a binary blob mapped into the application user space at 0xffff0000 (the AArch64 toolchain does not support compilation of AArch32 code). Full compatibility with ARMv7 user space is supported. The use of deprecated ARMv7 functionality (SWP, CP15 barriers) has been disabled by default on AArch64 kernels and unaligned LDM/STM is not supported. Please note that only the ARM 32-bit EABI is supported, so no OABI compatibility. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
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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