1 /*
2 * This file is subject to the terms and condi
3 * License. See the file "COPYING" in the mai
4 * for more details.
5 *
6 * Copyright (C) 1995, 96, 97, 98, 99, 2000, 0
7 * Copyright (C) 1999, 2000 Silicon Graphics,
8 * Copyright (C) 2001 MIPS Technologies, Inc.
9 */
10 #include <linux/errno.h>
11 #include <asm/asm.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>
21
22 #ifndef CONFIG_MIPS32_COMPAT
23 /* Neither O32 nor N32, so define handle_sys h
24 #define handle_sys64 handle_sys
25 #endif
26
27 .align 5
28 NESTED(handle_sys64, PT_SIZE, sp)
29 #if !defined(CONFIG_MIPS32_O32) && !defined(CO
30 /*
31 * When 32-bit compatibility is config
32 * already did this.
33 */
34 .set noat
35 SAVE_SOME
36 TRACE_IRQS_ON_RELOAD
37 STI
38 .set at
39 #endif
40
41 #if !defined(CONFIG_MIPS32_O32) && !defined(CO
42 ld t1, PT_EPC(sp) # skip
43 daddiu t1, 4 # skip
44 sd t1, PT_EPC(sp)
45 #endif
46
47 sd a3, PT_R26(sp) # save
48
49 LONG_S v0, TI_SYSCALL($28) # Stor
50
51 li t1, _TIF_WORK_SYSCALL_ENTRY
52 LONG_L t0, TI_FLAGS($28) # sysc
53 and t0, t1, t0
54 bnez t0, syscall_trace_entry
55
56 syscall_common:
57 dsubu t2, v0, __NR_64_Linux
58 sltiu t0, t2, __NR_64_Linux_syscalls
59 beqz t0, illegal_syscall
60
61 dsll t0, t2, 3 # offs
62 dla t2, sys_call_table
63 daddu t0, t2, t0
64 ld t2, (t0) # sysc
65 beqz t2, illegal_syscall
66
67 jalr t2 # Do T
68
69 li t0, -EMAXERRNO - 1 # erro
70 sltu t0, t0, v0
71 sd t0, PT_R7(sp) # set
72 beqz t0, 1f
73
74 ld t1, PT_R2(sp) # sysc
75 dnegu v0 # erro
76 sd t1, PT_R0(sp) # save
77 1: sd v0, PT_R2(sp) # resu
78
79 n64_syscall_exit:
80 j syscall_exit_partial
81
82 /* -------------------------------------------
83
84 syscall_trace_entry:
85 SAVE_STATIC
86 move a0, sp
87 jal syscall_trace_enter
88
89 bltz v0, 1f # secc
90
91 RESTORE_STATIC
92 ld v0, PT_R2(sp) # Rest
93 ld a0, PT_R4(sp) # Rest
94 ld a1, PT_R5(sp)
95 ld a2, PT_R6(sp)
96 ld a3, PT_R7(sp)
97 ld a4, PT_R8(sp)
98 ld a5, PT_R9(sp)
99 j syscall_common
100
101 1: j syscall_exit
102
103 illegal_syscall:
104 /* This also isn't a 64-bit syscall, t
105 li v0, ENOSYS
106 sd v0, PT_R2(sp)
107 li t0, 1
108 sd t0, PT_R7(sp)
109 j n64_syscall_exit
110 END(handle_sys64)
111
112 #define __SYSCALL(nr, entry) PTR_WD entry
113 .align 3
114 .type sys_call_table, @object
115 EXPORT(sys_call_table)
116 #include <asm/syscall_table_n64.h>
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