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/thread_info.h>
18 #include <asm/unistd.h>
19
20 #ifndef CONFIG_MIPS32_O32
21 /* No O32, so define handle_sys here */
22 #define handle_sysn32 handle_sys
23 #endif
24
25 .align 5
26 NESTED(handle_sysn32, PT_SIZE, sp)
27 #ifndef CONFIG_MIPS32_O32
28 .set noat
29 SAVE_SOME
30 TRACE_IRQS_ON_RELOAD
31 STI
32 .set at
33 #endif
34
35 dsubu t0, v0, __NR_N32_Linux # chec
36 sltiu t0, t0, __NR_N32_Linux_syscall
37
38 #ifndef CONFIG_MIPS32_O32
39 ld t1, PT_EPC(sp) # skip
40 daddiu t1, 4 # skip
41 sd t1, PT_EPC(sp)
42 #endif
43 beqz t0, not_n32_scall
44
45 sd a3, PT_R26(sp) # save
46
47 LONG_S v0, TI_SYSCALL($28) # Stor
48
49 li t1, _TIF_WORK_SYSCALL_ENTRY
50 LONG_L t0, TI_FLAGS($28) # sysc
51 and t0, t1, t0
52 bnez t0, n32_syscall_trace_entry
53
54 syscall_common:
55 dsll t0, v0, 3 # offs
56 ld t2, (sysn32_call_table - (__NR
57
58 jalr t2 # Do T
59
60 li t0, -EMAXERRNO - 1 # erro
61 sltu t0, t0, v0
62 sd t0, PT_R7(sp) # set
63 beqz t0, 1f
64
65 ld t1, PT_R2(sp) # sysc
66 dnegu v0 # erro
67 sd t1, PT_R0(sp) # save
68 1: sd v0, PT_R2(sp) # resu
69
70 j syscall_exit_partial
71
72 /* -------------------------------------------
73
74 n32_syscall_trace_entry:
75 SAVE_STATIC
76 move a0, sp
77 jal syscall_trace_enter
78
79 bltz v0, 1f # secc
80
81 RESTORE_STATIC
82 ld v0, PT_R2(sp) # Rest
83 ld a0, PT_R4(sp) # Rest
84 ld a1, PT_R5(sp)
85 ld a2, PT_R6(sp)
86 ld a3, PT_R7(sp)
87 ld a4, PT_R8(sp)
88 ld a5, PT_R9(sp)
89
90 dsubu t2, v0, __NR_N32_Linux # chec
91 sltiu t0, t2, __NR_N32_Linux_syscall
92 beqz t0, not_n32_scall
93
94 j syscall_common
95
96 1: j syscall_exit
97
98 not_n32_scall:
99 /* This is not an n32 compatibility sy
100 the n64 syscall handlers. */
101 j handle_sys64
102
103 END(handle_sysn32)
104
105 #define __SYSCALL(nr, entry) PTR_WD entry
106 .type sysn32_call_table, @object
107 EXPORT(sysn32_call_table)
108 #include <asm/syscall_table_n32.h>
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