[ARM] 3110/5: old ABI compat: multi-ABI syscall entry support
Patch from Nicolas Pitre This patch adds the required code to support both user space ABIs at the same time. A second syscall table is created to include legacy ABI syscalls that need an ABI compat wrapper. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Nicolas Pitre
Russell King
Родитель
687ad01914
Коммит
dd35afc22b
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@ -13,7 +13,7 @@
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#define NR_syscalls 328
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#else
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__syscall_start:
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100:
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/* 0 */ .long sys_restart_syscall
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.long sys_exit
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.long sys_fork_wrapper
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@ -27,7 +27,7 @@ __syscall_start:
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/* 10 */ .long sys_unlink
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.long sys_execve_wrapper
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.long sys_chdir
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.long sys_time /* used by libc4 */
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.long OBSOLETE(sys_time) /* used by libc4 */
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.long sys_mknod
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/* 15 */ .long sys_chmod
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.long sys_lchown16
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@ -36,15 +36,15 @@ __syscall_start:
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.long sys_lseek
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/* 20 */ .long sys_getpid
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.long sys_mount
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.long sys_oldumount /* used by libc4 */
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.long OBSOLETE(sys_oldumount) /* used by libc4 */
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.long sys_setuid16
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.long sys_getuid16
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/* 25 */ .long sys_stime
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/* 25 */ .long OBSOLETE(sys_stime)
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.long sys_ptrace
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.long sys_alarm /* used by libc4 */
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.long OBSOLETE(sys_alarm) /* used by libc4 */
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.long sys_ni_syscall /* was sys_fstat */
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.long sys_pause
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/* 30 */ .long sys_utime /* used by libc4 */
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/* 30 */ .long OBSOLETE(sys_utime) /* used by libc4 */
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.long sys_ni_syscall /* was sys_stty */
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.long sys_ni_syscall /* was sys_getty */
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.long sys_access
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@ -90,21 +90,21 @@ __syscall_start:
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.long sys_sigpending
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.long sys_sethostname
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/* 75 */ .long sys_setrlimit
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.long sys_old_getrlimit /* used by libc4 */
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.long OBSOLETE(sys_old_getrlimit) /* used by libc4 */
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.long sys_getrusage
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.long sys_gettimeofday
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.long sys_settimeofday
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/* 80 */ .long sys_getgroups16
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.long sys_setgroups16
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.long old_select /* used by libc4 */
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.long OBSOLETE(old_select) /* used by libc4 */
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.long sys_symlink
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.long sys_ni_syscall /* was sys_lstat */
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/* 85 */ .long sys_readlink
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.long sys_uselib
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.long sys_swapon
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.long sys_reboot
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.long old_readdir /* used by libc4 */
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/* 90 */ .long old_mmap /* used by libc4 */
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.long OBSOLETE(old_readdir) /* used by libc4 */
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/* 90 */ .long OBSOLETE(old_mmap) /* used by libc4 */
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.long sys_munmap
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.long sys_truncate
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.long sys_ftruncate
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@ -116,7 +116,7 @@ __syscall_start:
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.long sys_statfs
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/* 100 */ .long sys_fstatfs
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.long sys_ni_syscall
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.long sys_socketcall
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.long OBSOLETE(sys_socketcall)
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.long sys_syslog
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.long sys_setitimer
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/* 105 */ .long sys_getitimer
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@ -127,11 +127,11 @@ __syscall_start:
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/* 110 */ .long sys_ni_syscall /* was sys_iopl */
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.long sys_vhangup
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.long sys_ni_syscall
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.long sys_syscall /* call a syscall */
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.long OBSOLETE(sys_syscall) /* call a syscall */
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.long sys_wait4
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/* 115 */ .long sys_swapoff
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.long sys_sysinfo
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.long sys_ipc
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.long OBSOLETE(ABI(sys_ipc, sys_oabi_ipc))
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.long sys_fsync
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.long sys_sigreturn_wrapper
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/* 120 */ .long sys_clone_wrapper
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@ -194,8 +194,8 @@ __syscall_start:
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.long sys_rt_sigtimedwait
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.long sys_rt_sigqueueinfo
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.long sys_rt_sigsuspend_wrapper
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/* 180 */ .long sys_pread64
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.long sys_pwrite64
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/* 180 */ .long ABI(sys_pread64, sys_oabi_pread64)
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.long ABI(sys_pwrite64, sys_oabi_pwrite64)
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.long sys_chown16
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.long sys_getcwd
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.long sys_capget
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@ -207,11 +207,11 @@ __syscall_start:
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/* 190 */ .long sys_vfork_wrapper
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.long sys_getrlimit
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.long sys_mmap2
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.long sys_truncate64
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.long sys_ftruncate64
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/* 195 */ .long sys_stat64
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.long sys_lstat64
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.long sys_fstat64
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.long ABI(sys_truncate64, sys_oabi_truncate64)
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.long ABI(sys_ftruncate64, sys_oabi_ftruncate64)
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/* 195 */ .long ABI(sys_stat64, sys_oabi_stat64)
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.long ABI(sys_lstat64, sys_oabi_lstat64)
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.long ABI(sys_fstat64, sys_oabi_fstat64)
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.long sys_lchown
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.long sys_getuid
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/* 200 */ .long sys_getgid
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@ -235,11 +235,11 @@ __syscall_start:
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.long sys_pivot_root
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.long sys_mincore
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/* 220 */ .long sys_madvise
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.long sys_fcntl64
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.long ABI(sys_fcntl64, sys_oabi_fcntl64)
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.long sys_ni_syscall /* TUX */
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.long sys_ni_syscall
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.long sys_gettid
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/* 225 */ .long sys_readahead
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/* 225 */ .long ABI(sys_readahead, sys_oabi_readahead)
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.long sys_setxattr
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.long sys_lsetxattr
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.long sys_fsetxattr
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@ -265,8 +265,8 @@ __syscall_start:
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.long sys_exit_group
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.long sys_lookup_dcookie
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/* 250 */ .long sys_epoll_create
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.long sys_epoll_ctl
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.long sys_epoll_wait
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.long ABI(sys_epoll_ctl, sys_oabi_epoll_ctl)
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.long ABI(sys_epoll_wait, sys_oabi_epoll_wait)
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.long sys_remap_file_pages
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.long sys_ni_syscall /* sys_set_thread_area */
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/* 255 */ .long sys_ni_syscall /* sys_get_thread_area */
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@ -312,7 +312,7 @@ __syscall_start:
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/* 295 */ .long sys_getsockopt
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.long sys_sendmsg
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.long sys_recvmsg
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.long sys_semop
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.long ABI(sys_semop, sys_oabi_semop)
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.long sys_semget
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/* 300 */ .long sys_semctl
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.long sys_msgsnd
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@ -326,7 +326,7 @@ __syscall_start:
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.long sys_add_key
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/* 310 */ .long sys_request_key
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.long sys_keyctl
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.long sys_semtimedop
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.long ABI(sys_semtimedop, sys_oabi_semtimedop)
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/* vserver */ .long sys_ni_syscall
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.long sys_ioprio_set
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/* 315 */ .long sys_ioprio_get
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@ -336,9 +336,8 @@ __syscall_start:
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.long sys_mbind
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/* 320 */ .long sys_get_mempolicy
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.long sys_set_mempolicy
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__syscall_end:
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.rept NR_syscalls - (__syscall_end - __syscall_start) / 4
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.rept NR_syscalls - (. - 100b) / 4
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.long sys_ni_syscall
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.endr
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#endif
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@ -123,23 +123,49 @@ ENTRY(vector_swi)
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/*
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* Get the system call number.
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*/
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#if defined(CONFIG_AEABI)
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@ syscall number is in scno (r7) already.
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#if defined(CONFIG_OABI_COMPAT)
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/*
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* If we have CONFIG_OABI_COMPAT then we need to look at the swi
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* value to determine if it is an EABI or an old ABI call.
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*/
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#ifdef CONFIG_ARM_THUMB
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tst r8, #PSR_T_BIT
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movne r10, #0 @ no thumb OABI emulation
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ldreq r10, [lr, #-4] @ get SWI instruction
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#else
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ldr r10, [lr, #-4] @ get SWI instruction
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A710( and ip, r10, #0x0f000000 @ check for SWI )
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A710( teq ip, #0x0f000000 )
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A710( bne .Larm710bug )
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#endif
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#elif defined(CONFIG_AEABI)
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/*
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* Pure EABI user space always put syscall number into scno (r7).
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*/
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A710( ldr ip, [lr, #-4] @ get SWI instruction )
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A710( and ip, ip, #0x0f000000 @ check for SWI )
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A710( teq ip, #0x0f000000 )
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A710( bne .Larm710bug )
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#elif defined(CONFIG_ARM_THUMB)
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/* Legacy ABI only, possibly thumb mode. */
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tst r8, #PSR_T_BIT @ this is SPSR from save_user_regs
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addne scno, r7, #__NR_SYSCALL_BASE @ put OS number in
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ldreq scno, [lr, #-4]
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#else
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/* Legacy ABI only. */
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ldr scno, [lr, #-4] @ get SWI instruction
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A710( and ip, scno, #0x0f000000 @ check for SWI )
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A710( teq ip, #0x0f000000 )
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A710( bne .Larm710bug )
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#endif
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#ifdef CONFIG_ALIGNMENT_TRAP
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@ -150,12 +176,24 @@ ENTRY(vector_swi)
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enable_irq
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get_thread_info tsk
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adr tbl, sys_call_table @ load syscall table pointer
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ldr ip, [tsk, #TI_FLAGS] @ check for syscall tracing
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#ifndef CONFIG_AEABI
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#if defined(CONFIG_OABI_COMPAT)
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/*
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* If the swi argument is zero, this is an EABI call and we do nothing.
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*
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* If this is an old ABI call, get the syscall number into scno and
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* get the old ABI syscall table address.
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*/
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bics r10, r10, #0xff000000
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eorne scno, r10, #__NR_OABI_SYSCALL_BASE
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ldrne tbl, =sys_oabi_call_table
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#elif !defined(CONFIG_AEABI)
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bic scno, scno, #0xff000000 @ mask off SWI op-code
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eor scno, scno, #__NR_SYSCALL_BASE @ check OS number
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#endif
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adr tbl, sys_call_table @ load syscall table pointer
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stmdb sp!, {r4, r5} @ push fifth and sixth args
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tst ip, #_TIF_SYSCALL_TRACE @ are we tracing syscalls?
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bne __sys_trace
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@ -199,11 +237,25 @@ __sys_trace_return:
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.type __cr_alignment, #object
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__cr_alignment:
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.word cr_alignment
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#endif
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.ltorg
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/*
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* This is the syscall table declaration for native ABI syscalls.
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* With EABI a couple syscalls are obsolete and defined as sys_ni_syscall.
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*/
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#define ABI(native, compat) native
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#ifdef CONFIG_AEABI
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#define OBSOLETE(syscall) sys_ni_syscall
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#else
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#define OBSOLETE(syscall) syscall
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#endif
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.type sys_call_table, #object
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ENTRY(sys_call_table)
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#include "calls.S"
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#undef ABI
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#undef OBSOLETE
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/*============================================================================
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* Special system call wrappers
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@ -212,8 +264,7 @@ ENTRY(sys_call_table)
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@ r8 = syscall table
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.type sys_syscall, #function
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sys_syscall:
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#ifndef CONFIG_AEABI
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eor scno, r0, #__NR_SYSCALL_BASE
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eor scno, r0, #__NR_OABI_SYSCALL_BASE
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cmp scno, #__NR_syscall - __NR_SYSCALL_BASE
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cmpne scno, #NR_syscalls @ check range
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stmloia sp, {r5, r6} @ shuffle args
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@ -222,7 +273,6 @@ sys_syscall:
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movlo r2, r3
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movlo r3, r4
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ldrlo pc, [tbl, scno, lsl #2]
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#endif
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b sys_ni_syscall
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sys_fork_wrapper:
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@ -290,6 +340,7 @@ sys_mmap2:
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#endif
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#ifdef CONFIG_OABI_COMPAT
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/*
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* These are syscalls with argument register differences
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*/
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@ -318,5 +369,18 @@ sys_oabi_readahead:
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mov r2, r1
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b sys_readahead
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/*
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* Let's declare a second syscall table for old ABI binaries
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* using the compatibility syscall entries.
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*/
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#define ABI(native, compat) compat
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#define OBSOLETE(syscall) syscall
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.type sys_oabi_call_table, #object
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ENTRY(sys_oabi_call_table)
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#include "calls.S"
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#undef ABI
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#undef OBSOLETE
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#endif
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@ -147,6 +147,7 @@ asmlinkage int old_select(struct sel_arg_struct __user *arg)
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return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
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}
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#if !defined(CONFIG_AEABI) || defined(CONFIG_OABI_COMPAT)
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/*
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* sys_ipc() is the de-multiplexer for the SysV IPC calls..
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*
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@ -226,6 +227,7 @@ asmlinkage int sys_ipc(uint call, int first, int second, int third,
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return -ENOSYS;
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}
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}
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#endif
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/* Fork a new task - this creates a new program thread.
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* This is called indirectly via a small wrapper
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@ -514,22 +514,25 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5, type6 arg6
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#ifdef __KERNEL__
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#define __ARCH_WANT_IPC_PARSE_VERSION
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#define __ARCH_WANT_OLD_READDIR
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#define __ARCH_WANT_STAT64
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#define __ARCH_WANT_SYS_ALARM
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#define __ARCH_WANT_SYS_GETHOSTNAME
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#define __ARCH_WANT_SYS_PAUSE
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#define __ARCH_WANT_SYS_TIME
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#define __ARCH_WANT_SYS_UTIME
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#define __ARCH_WANT_SYS_SOCKETCALL
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#define __ARCH_WANT_SYS_GETPGRP
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#define __ARCH_WANT_SYS_LLSEEK
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#define __ARCH_WANT_SYS_NICE
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#define __ARCH_WANT_SYS_OLD_GETRLIMIT
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#define __ARCH_WANT_SYS_OLDUMOUNT
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#define __ARCH_WANT_SYS_SIGPENDING
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#define __ARCH_WANT_SYS_SIGPROCMASK
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#define __ARCH_WANT_SYS_RT_SIGACTION
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#if !defined(CONFIG_AEABI) || defined(CONFIG_OABI_COMPAT)
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#define __ARCH_WANT_SYS_TIME
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#define __ARCH_WANT_SYS_OLDUMOUNT
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#define __ARCH_WANT_SYS_ALARM
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#define __ARCH_WANT_SYS_UTIME
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#define __ARCH_WANT_SYS_OLD_GETRLIMIT
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#define __ARCH_WANT_OLD_READDIR
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#define __ARCH_WANT_SYS_SOCKETCALL
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#endif
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#endif
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#ifdef __KERNEL_SYSCALLS__
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