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49955d84cd
The MIPS sysmips system call handler may return directly from the
MIPS_ATOMIC_SET case (mips_atomic_set()) to syscall_exit. This path
restores the static (callee saved) registers, however they won't have
been saved on entry to the system call.
Use the save_static_function() macro to create a __sys_sysmips wrapper
function which saves the static registers before calling sys_sysmips, so
that the correct static register state is restored by syscall_exit.
Fixes: f1e39a4a61 ("MIPS: Rewrite sysmips(MIPS_ATOMIC_SET, ...) in C with inline assembler")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/16149/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
443 lines
9.8 KiB
ArmAsm
443 lines
9.8 KiB
ArmAsm
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02 by Ralf Baechle
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* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
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* Copyright (C) 2001 MIPS Technologies, Inc.
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*/
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#include <linux/errno.h>
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#include <asm/asm.h>
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#include <asm/asmmacro.h>
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#include <asm/irqflags.h>
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#include <asm/mipsregs.h>
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#include <asm/regdef.h>
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#include <asm/stackframe.h>
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#include <asm/asm-offsets.h>
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#include <asm/sysmips.h>
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#include <asm/thread_info.h>
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#include <asm/unistd.h>
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#include <asm/war.h>
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#ifndef CONFIG_BINFMT_ELF32
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/* Neither O32 nor N32, so define handle_sys here */
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#define handle_sys64 handle_sys
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#endif
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.align 5
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NESTED(handle_sys64, PT_SIZE, sp)
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#if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
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/*
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* When 32-bit compatibility is configured scall_o32.S
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* already did this.
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*/
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.set noat
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SAVE_SOME
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TRACE_IRQS_ON_RELOAD
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STI
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.set at
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#endif
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#if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
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ld t1, PT_EPC(sp) # skip syscall on return
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daddiu t1, 4 # skip to next instruction
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sd t1, PT_EPC(sp)
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#endif
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sd a3, PT_R26(sp) # save a3 for syscall restarting
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li t1, _TIF_WORK_SYSCALL_ENTRY
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LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
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and t0, t1, t0
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bnez t0, syscall_trace_entry
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syscall_common:
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dsubu t2, v0, __NR_64_Linux
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sltiu t0, t2, __NR_64_Linux_syscalls + 1
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beqz t0, illegal_syscall
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dsll t0, t2, 3 # offset into table
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dla t2, sys_call_table
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daddu t0, t2, t0
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ld t2, (t0) # syscall routine
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beqz t2, illegal_syscall
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jalr t2 # Do The Real Thing (TM)
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li t0, -EMAXERRNO - 1 # error?
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sltu t0, t0, v0
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sd t0, PT_R7(sp) # set error flag
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beqz t0, 1f
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ld t1, PT_R2(sp) # syscall number
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dnegu v0 # error
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sd t1, PT_R0(sp) # save it for syscall restarting
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1: sd v0, PT_R2(sp) # result
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n64_syscall_exit:
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j syscall_exit_partial
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/* ------------------------------------------------------------------------ */
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syscall_trace_entry:
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SAVE_STATIC
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move a0, sp
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move a1, v0
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jal syscall_trace_enter
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bltz v0, 1f # seccomp failed? Skip syscall
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RESTORE_STATIC
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ld v0, PT_R2(sp) # Restore syscall (maybe modified)
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ld a0, PT_R4(sp) # Restore argument registers
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ld a1, PT_R5(sp)
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ld a2, PT_R6(sp)
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ld a3, PT_R7(sp)
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ld a4, PT_R8(sp)
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ld a5, PT_R9(sp)
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j syscall_common
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1: j syscall_exit
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illegal_syscall:
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/* This also isn't a 64-bit syscall, throw an error. */
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li v0, ENOSYS # error
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sd v0, PT_R2(sp)
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li t0, 1 # set error flag
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sd t0, PT_R7(sp)
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j n64_syscall_exit
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END(handle_sys64)
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.align 3
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.type sys_call_table, @object
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EXPORT(sys_call_table)
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PTR sys_read /* 5000 */
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PTR sys_write
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PTR sys_open
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PTR sys_close
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PTR sys_newstat
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PTR sys_newfstat /* 5005 */
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PTR sys_newlstat
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PTR sys_poll
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PTR sys_lseek
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PTR sys_mips_mmap
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PTR sys_mprotect /* 5010 */
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PTR sys_munmap
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PTR sys_brk
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PTR sys_rt_sigaction
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PTR sys_rt_sigprocmask
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PTR sys_ioctl /* 5015 */
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PTR sys_pread64
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PTR sys_pwrite64
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PTR sys_readv
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PTR sys_writev
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PTR sys_access /* 5020 */
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PTR sysm_pipe
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PTR sys_select
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PTR sys_sched_yield
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PTR sys_mremap
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PTR sys_msync /* 5025 */
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PTR sys_mincore
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PTR sys_madvise
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PTR sys_shmget
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PTR sys_shmat
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PTR sys_shmctl /* 5030 */
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PTR sys_dup
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PTR sys_dup2
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PTR sys_pause
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PTR sys_nanosleep
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PTR sys_getitimer /* 5035 */
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PTR sys_setitimer
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PTR sys_alarm
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PTR sys_getpid
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PTR sys_sendfile64
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PTR sys_socket /* 5040 */
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PTR sys_connect
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PTR sys_accept
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PTR sys_sendto
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PTR sys_recvfrom
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PTR sys_sendmsg /* 5045 */
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PTR sys_recvmsg
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PTR sys_shutdown
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PTR sys_bind
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PTR sys_listen
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PTR sys_getsockname /* 5050 */
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PTR sys_getpeername
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PTR sys_socketpair
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PTR sys_setsockopt
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PTR sys_getsockopt
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PTR __sys_clone /* 5055 */
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PTR __sys_fork
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PTR sys_execve
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PTR sys_exit
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PTR sys_wait4
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PTR sys_kill /* 5060 */
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PTR sys_newuname
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PTR sys_semget
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PTR sys_semop
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PTR sys_semctl
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PTR sys_shmdt /* 5065 */
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PTR sys_msgget
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PTR sys_msgsnd
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PTR sys_msgrcv
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PTR sys_msgctl
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PTR sys_fcntl /* 5070 */
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PTR sys_flock
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PTR sys_fsync
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PTR sys_fdatasync
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PTR sys_truncate
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PTR sys_ftruncate /* 5075 */
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PTR sys_getdents
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PTR sys_getcwd
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PTR sys_chdir
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PTR sys_fchdir
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PTR sys_rename /* 5080 */
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PTR sys_mkdir
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PTR sys_rmdir
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PTR sys_creat
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PTR sys_link
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PTR sys_unlink /* 5085 */
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PTR sys_symlink
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PTR sys_readlink
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PTR sys_chmod
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PTR sys_fchmod
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PTR sys_chown /* 5090 */
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PTR sys_fchown
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PTR sys_lchown
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PTR sys_umask
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PTR sys_gettimeofday
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PTR sys_getrlimit /* 5095 */
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PTR sys_getrusage
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PTR sys_sysinfo
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PTR sys_times
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PTR sys_ptrace
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PTR sys_getuid /* 5100 */
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PTR sys_syslog
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PTR sys_getgid
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PTR sys_setuid
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PTR sys_setgid
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PTR sys_geteuid /* 5105 */
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PTR sys_getegid
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PTR sys_setpgid
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PTR sys_getppid
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PTR sys_getpgrp
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PTR sys_setsid /* 5110 */
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PTR sys_setreuid
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PTR sys_setregid
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PTR sys_getgroups
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PTR sys_setgroups
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PTR sys_setresuid /* 5115 */
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PTR sys_getresuid
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PTR sys_setresgid
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PTR sys_getresgid
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PTR sys_getpgid
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PTR sys_setfsuid /* 5120 */
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PTR sys_setfsgid
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PTR sys_getsid
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PTR sys_capget
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PTR sys_capset
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PTR sys_rt_sigpending /* 5125 */
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PTR sys_rt_sigtimedwait
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PTR sys_rt_sigqueueinfo
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PTR sys_rt_sigsuspend
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PTR sys_sigaltstack
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PTR sys_utime /* 5130 */
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PTR sys_mknod
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PTR sys_personality
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PTR sys_ustat
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PTR sys_statfs
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PTR sys_fstatfs /* 5135 */
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PTR sys_sysfs
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PTR sys_getpriority
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PTR sys_setpriority
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PTR sys_sched_setparam
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PTR sys_sched_getparam /* 5140 */
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PTR sys_sched_setscheduler
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PTR sys_sched_getscheduler
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PTR sys_sched_get_priority_max
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PTR sys_sched_get_priority_min
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PTR sys_sched_rr_get_interval /* 5145 */
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PTR sys_mlock
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PTR sys_munlock
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PTR sys_mlockall
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PTR sys_munlockall
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PTR sys_vhangup /* 5150 */
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PTR sys_pivot_root
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PTR sys_sysctl
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PTR sys_prctl
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PTR sys_adjtimex
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PTR sys_setrlimit /* 5155 */
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PTR sys_chroot
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PTR sys_sync
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PTR sys_acct
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PTR sys_settimeofday
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PTR sys_mount /* 5160 */
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PTR sys_umount
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PTR sys_swapon
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PTR sys_swapoff
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PTR sys_reboot
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PTR sys_sethostname /* 5165 */
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PTR sys_setdomainname
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PTR sys_ni_syscall /* was create_module */
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PTR sys_init_module
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PTR sys_delete_module
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PTR sys_ni_syscall /* 5170, was get_kernel_syms */
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PTR sys_ni_syscall /* was query_module */
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PTR sys_quotactl
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PTR sys_ni_syscall /* was nfsservctl */
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PTR sys_ni_syscall /* res. for getpmsg */
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PTR sys_ni_syscall /* 5175 for putpmsg */
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PTR sys_ni_syscall /* res. for afs_syscall */
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PTR sys_ni_syscall /* res. for security */
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PTR sys_gettid
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PTR sys_readahead
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PTR sys_setxattr /* 5180 */
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PTR sys_lsetxattr
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PTR sys_fsetxattr
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PTR sys_getxattr
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PTR sys_lgetxattr
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PTR sys_fgetxattr /* 5185 */
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PTR sys_listxattr
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PTR sys_llistxattr
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PTR sys_flistxattr
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PTR sys_removexattr
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PTR sys_lremovexattr /* 5190 */
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PTR sys_fremovexattr
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PTR sys_tkill
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PTR sys_ni_syscall
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PTR sys_futex
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PTR sys_sched_setaffinity /* 5195 */
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PTR sys_sched_getaffinity
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PTR sys_cacheflush
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PTR sys_cachectl
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PTR __sys_sysmips
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PTR sys_io_setup /* 5200 */
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PTR sys_io_destroy
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PTR sys_io_getevents
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PTR sys_io_submit
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PTR sys_io_cancel
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PTR sys_exit_group /* 5205 */
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PTR sys_lookup_dcookie
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PTR sys_epoll_create
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PTR sys_epoll_ctl
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PTR sys_epoll_wait
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PTR sys_remap_file_pages /* 5210 */
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PTR sys_rt_sigreturn
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PTR sys_set_tid_address
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PTR sys_restart_syscall
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PTR sys_semtimedop
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PTR sys_fadvise64_64 /* 5215 */
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PTR sys_timer_create
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PTR sys_timer_settime
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PTR sys_timer_gettime
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PTR sys_timer_getoverrun
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PTR sys_timer_delete /* 5220 */
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PTR sys_clock_settime
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PTR sys_clock_gettime
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PTR sys_clock_getres
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PTR sys_clock_nanosleep
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PTR sys_tgkill /* 5225 */
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PTR sys_utimes
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PTR sys_mbind
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PTR sys_get_mempolicy
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PTR sys_set_mempolicy
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PTR sys_mq_open /* 5230 */
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PTR sys_mq_unlink
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PTR sys_mq_timedsend
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PTR sys_mq_timedreceive
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PTR sys_mq_notify
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PTR sys_mq_getsetattr /* 5235 */
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PTR sys_ni_syscall /* sys_vserver */
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PTR sys_waitid
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PTR sys_ni_syscall /* available, was setaltroot */
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PTR sys_add_key
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PTR sys_request_key /* 5240 */
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PTR sys_keyctl
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PTR sys_set_thread_area
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PTR sys_inotify_init
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PTR sys_inotify_add_watch
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PTR sys_inotify_rm_watch /* 5245 */
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PTR sys_migrate_pages
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PTR sys_openat
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PTR sys_mkdirat
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PTR sys_mknodat
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PTR sys_fchownat /* 5250 */
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PTR sys_futimesat
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PTR sys_newfstatat
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PTR sys_unlinkat
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PTR sys_renameat
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PTR sys_linkat /* 5255 */
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PTR sys_symlinkat
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PTR sys_readlinkat
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PTR sys_fchmodat
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PTR sys_faccessat
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PTR sys_pselect6 /* 5260 */
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PTR sys_ppoll
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PTR sys_unshare
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PTR sys_splice
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PTR sys_sync_file_range
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PTR sys_tee /* 5265 */
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PTR sys_vmsplice
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PTR sys_move_pages
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PTR sys_set_robust_list
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PTR sys_get_robust_list
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PTR sys_kexec_load /* 5270 */
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PTR sys_getcpu
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PTR sys_epoll_pwait
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PTR sys_ioprio_set
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PTR sys_ioprio_get
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PTR sys_utimensat /* 5275 */
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PTR sys_signalfd
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PTR sys_ni_syscall /* was timerfd */
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PTR sys_eventfd
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PTR sys_fallocate
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PTR sys_timerfd_create /* 5280 */
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PTR sys_timerfd_gettime
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PTR sys_timerfd_settime
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PTR sys_signalfd4
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PTR sys_eventfd2
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PTR sys_epoll_create1 /* 5285 */
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PTR sys_dup3
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PTR sys_pipe2
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PTR sys_inotify_init1
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PTR sys_preadv
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PTR sys_pwritev /* 5290 */
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PTR sys_rt_tgsigqueueinfo
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PTR sys_perf_event_open
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PTR sys_accept4
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PTR sys_recvmmsg
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PTR sys_fanotify_init /* 5295 */
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PTR sys_fanotify_mark
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PTR sys_prlimit64
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PTR sys_name_to_handle_at
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PTR sys_open_by_handle_at
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PTR sys_clock_adjtime /* 5300 */
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PTR sys_syncfs
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PTR sys_sendmmsg
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PTR sys_setns
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PTR sys_process_vm_readv
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PTR sys_process_vm_writev /* 5305 */
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PTR sys_kcmp
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PTR sys_finit_module
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PTR sys_getdents64
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PTR sys_sched_setattr
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PTR sys_sched_getattr /* 5310 */
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PTR sys_renameat2
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PTR sys_seccomp
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PTR sys_getrandom
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PTR sys_memfd_create
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PTR sys_bpf /* 5315 */
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PTR sys_execveat
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PTR sys_userfaultfd
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PTR sys_membarrier
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PTR sys_mlock2
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PTR sys_copy_file_range /* 5320 */
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PTR sys_preadv2
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PTR sys_pwritev2
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PTR sys_pkey_mprotect
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PTR sys_pkey_alloc
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PTR sys_pkey_free /* 5325 */
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PTR sys_statx
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.size sys_call_table,.-sys_call_table
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