2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02 by Ralf Baechle
7 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
8 * Copyright (C) 2001 MIPS Technologies, Inc.
10 #include <linux/errno.h>
12 #include <asm/asmmacro.h>
13 #include <asm/irqflags.h>
14 #include <asm/mipsregs.h>
15 #include <asm/regdef.h>
16 #include <asm/stackframe.h>
17 #include <asm/asm-offsets.h>
18 #include <asm/sysmips.h>
19 #include <asm/thread_info.h>
20 #include <asm/unistd.h>
22 #ifndef CONFIG_MIPS32_COMPAT
23 /* Neither O32 nor N32, so define handle_sys here */
24 #define handle_sys64 handle_sys
28 NESTED(handle_sys64, PT_SIZE, sp)
29 #if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
31 * When 32-bit compatibility is configured scall_o32.S
41 #if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
42 ld t1, PT_EPC(sp) # skip syscall on return
43 daddiu t1, 4 # skip to next instruction
47 sd a3, PT_R26(sp) # save a3 for syscall restarting
49 li t1, _TIF_WORK_SYSCALL_ENTRY
50 LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
52 bnez t0, syscall_trace_entry
55 dsubu t2, v0, __NR_64_Linux
56 sltiu t0, t2, __NR_64_Linux_syscalls
57 beqz t0, illegal_syscall
59 dsll t0, t2, 3 # offset into table
60 dla t2, sys_call_table
62 ld t2, (t0) # syscall routine
63 beqz t2, illegal_syscall
65 jalr t2 # Do The Real Thing (TM)
67 li t0, -EMAXERRNO - 1 # error?
69 sd t0, PT_R7(sp) # set error flag
72 ld t1, PT_R2(sp) # syscall number
74 sd t1, PT_R0(sp) # save it for syscall restarting
75 1: sd v0, PT_R2(sp) # result
78 j syscall_exit_partial
80 /* ------------------------------------------------------------------------ */
86 jal syscall_trace_enter
88 bltz v0, 1f # seccomp failed? Skip syscall
91 ld v0, PT_R2(sp) # Restore syscall (maybe modified)
92 ld a0, PT_R4(sp) # Restore argument registers
103 /* This also isn't a 64-bit syscall, throw an error. */
104 li v0, ENOSYS # error
106 li t0, 1 # set error flag
111 #define __SYSCALL(nr, entry) PTR_WD entry
113 .type sys_call_table, @object
114 EXPORT(sys_call_table)
115 #include <asm/syscall_table_n64.h>