1 /* 1 /*
2 * This file is subject to the terms and condi 2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the mai 3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details. 4 * for more details.
5 * 5 *
6 * Copyright (C) 1995, 96, 97, 98, 99, 2000, 0 6 * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02 by Ralf Baechle
7 * Copyright (C) 1999, 2000 Silicon Graphics, 7 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
8 * Copyright (C) 2001 MIPS Technologies, Inc. 8 * Copyright (C) 2001 MIPS Technologies, Inc.
9 */ 9 */
10 #include <linux/errno.h> 10 #include <linux/errno.h>
11 #include <asm/asm.h> 11 #include <asm/asm.h>
12 #include <asm/asmmacro.h> 12 #include <asm/asmmacro.h>
13 #include <asm/irqflags.h> 13 #include <asm/irqflags.h>
14 #include <asm/mipsregs.h> 14 #include <asm/mipsregs.h>
15 #include <asm/regdef.h> 15 #include <asm/regdef.h>
16 #include <asm/stackframe.h> 16 #include <asm/stackframe.h>
17 #include <asm/asm-offsets.h> 17 #include <asm/asm-offsets.h>
18 #include <asm/sysmips.h> 18 #include <asm/sysmips.h>
19 #include <asm/thread_info.h> 19 #include <asm/thread_info.h>
20 #include <asm/unistd.h> 20 #include <asm/unistd.h>
>> 21 #include <asm/war.h>
21 22
22 #ifndef CONFIG_MIPS32_COMPAT !! 23 #ifndef CONFIG_BINFMT_ELF32
23 /* Neither O32 nor N32, so define handle_sys h 24 /* Neither O32 nor N32, so define handle_sys here */
24 #define handle_sys64 handle_sys 25 #define handle_sys64 handle_sys
25 #endif 26 #endif
26 27
27 .align 5 28 .align 5
28 NESTED(handle_sys64, PT_SIZE, sp) 29 NESTED(handle_sys64, PT_SIZE, sp)
29 #if !defined(CONFIG_MIPS32_O32) && !defined(CO 30 #if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
30 /* 31 /*
31 * When 32-bit compatibility is config 32 * When 32-bit compatibility is configured scall_o32.S
32 * already did this. 33 * already did this.
33 */ 34 */
34 .set noat 35 .set noat
35 SAVE_SOME 36 SAVE_SOME
36 TRACE_IRQS_ON_RELOAD 37 TRACE_IRQS_ON_RELOAD
37 STI 38 STI
38 .set at 39 .set at
39 #endif 40 #endif
40 41
41 #if !defined(CONFIG_MIPS32_O32) && !defined(CO 42 #if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
42 ld t1, PT_EPC(sp) # skip 43 ld t1, PT_EPC(sp) # skip syscall on return
43 daddiu t1, 4 # skip 44 daddiu t1, 4 # skip to next instruction
44 sd t1, PT_EPC(sp) 45 sd t1, PT_EPC(sp)
45 #endif 46 #endif
46 47
47 sd a3, PT_R26(sp) # save 48 sd a3, PT_R26(sp) # save a3 for syscall restarting
48 49
49 LONG_S v0, TI_SYSCALL($28) # Stor <<
50 <<
51 li t1, _TIF_WORK_SYSCALL_ENTRY 50 li t1, _TIF_WORK_SYSCALL_ENTRY
52 LONG_L t0, TI_FLAGS($28) # sysc 51 LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
53 and t0, t1, t0 52 and t0, t1, t0
54 bnez t0, syscall_trace_entry 53 bnez t0, syscall_trace_entry
55 54
56 syscall_common: 55 syscall_common:
57 dsubu t2, v0, __NR_64_Linux 56 dsubu t2, v0, __NR_64_Linux
58 sltiu t0, t2, __NR_64_Linux_syscalls 57 sltiu t0, t2, __NR_64_Linux_syscalls
59 beqz t0, illegal_syscall 58 beqz t0, illegal_syscall
60 59
61 dsll t0, t2, 3 # offs 60 dsll t0, t2, 3 # offset into table
62 dla t2, sys_call_table 61 dla t2, sys_call_table
63 daddu t0, t2, t0 62 daddu t0, t2, t0
64 ld t2, (t0) # sysc 63 ld t2, (t0) # syscall routine
65 beqz t2, illegal_syscall 64 beqz t2, illegal_syscall
66 65
67 jalr t2 # Do T 66 jalr t2 # Do The Real Thing (TM)
68 67
69 li t0, -EMAXERRNO - 1 # erro 68 li t0, -EMAXERRNO - 1 # error?
70 sltu t0, t0, v0 69 sltu t0, t0, v0
71 sd t0, PT_R7(sp) # set 70 sd t0, PT_R7(sp) # set error flag
72 beqz t0, 1f 71 beqz t0, 1f
73 72
74 ld t1, PT_R2(sp) # sysc 73 ld t1, PT_R2(sp) # syscall number
75 dnegu v0 # erro 74 dnegu v0 # error
76 sd t1, PT_R0(sp) # save 75 sd t1, PT_R0(sp) # save it for syscall restarting
77 1: sd v0, PT_R2(sp) # resu 76 1: sd v0, PT_R2(sp) # result
78 77
79 n64_syscall_exit: 78 n64_syscall_exit:
80 j syscall_exit_partial 79 j syscall_exit_partial
81 80
82 /* ------------------------------------------- 81 /* ------------------------------------------------------------------------ */
83 82
84 syscall_trace_entry: 83 syscall_trace_entry:
85 SAVE_STATIC 84 SAVE_STATIC
86 move a0, sp 85 move a0, sp
>> 86 move a1, v0
87 jal syscall_trace_enter 87 jal syscall_trace_enter
88 88
89 bltz v0, 1f # secc 89 bltz v0, 1f # seccomp failed? Skip syscall
90 90
91 RESTORE_STATIC 91 RESTORE_STATIC
92 ld v0, PT_R2(sp) # Rest 92 ld v0, PT_R2(sp) # Restore syscall (maybe modified)
93 ld a0, PT_R4(sp) # Rest 93 ld a0, PT_R4(sp) # Restore argument registers
94 ld a1, PT_R5(sp) 94 ld a1, PT_R5(sp)
95 ld a2, PT_R6(sp) 95 ld a2, PT_R6(sp)
96 ld a3, PT_R7(sp) 96 ld a3, PT_R7(sp)
97 ld a4, PT_R8(sp) 97 ld a4, PT_R8(sp)
98 ld a5, PT_R9(sp) 98 ld a5, PT_R9(sp)
99 j syscall_common 99 j syscall_common
100 100
101 1: j syscall_exit 101 1: j syscall_exit
102 102
103 illegal_syscall: 103 illegal_syscall:
104 /* This also isn't a 64-bit syscall, t 104 /* This also isn't a 64-bit syscall, throw an error. */
105 li v0, ENOSYS 105 li v0, ENOSYS # error
106 sd v0, PT_R2(sp) 106 sd v0, PT_R2(sp)
107 li t0, 1 107 li t0, 1 # set error flag
108 sd t0, PT_R7(sp) 108 sd t0, PT_R7(sp)
109 j n64_syscall_exit 109 j n64_syscall_exit
110 END(handle_sys64) 110 END(handle_sys64)
111 111
112 #define __SYSCALL(nr, entry) PTR_WD entry !! 112 #define __SYSCALL(nr, entry) PTR entry
113 .align 3 113 .align 3
114 .type sys_call_table, @object 114 .type sys_call_table, @object
115 EXPORT(sys_call_table) 115 EXPORT(sys_call_table)
116 #include <asm/syscall_table_n64.h> !! 116 #include <asm/syscall_table_64_n64.h>
>> 117 #undef __SYSCALL
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