1 /*
2 * Copyright (c) 2012 The Native Client Authors. All rights reserved.
3 * Use of this source code is governed by a BSD-style license that can be
4 * found in the LICENSE file.
5 */
6
7 /*
8 * NaCl Secure Runtime
9 */
10
11 #ifndef __NATIVE_CLIENT_SERVICE_RUNTIME_ARCH_MIPS_SEL_RT_H__
12 #define __NATIVE_CLIENT_SERVICE_RUNTIME_ARCH_MIPS_SEL_RT_H__ 1
13
14 #if !defined(__ASSEMBLER__)
15
16 #include <stddef.h>
17
18 #include "native_client/src/include/nacl_base.h"
19 #include "native_client/src/include/nacl_macros.h"
20 #include "native_client/src/include/portability.h"
21 #include "native_client/src/shared/platform/nacl_check.h"
22
23 EXTERN_C_BEGIN
24
25 uint32_t NaClGetStackPtr(void);
26
27 typedef uint32_t nacl_reg_t;
28
29 #define NACL_PRIdNACL_REG NACL_PRId32
30 #define NACL_PRIiNACL_REG NACL_PRIi32
31 #define NACL_PRIoNACL_REG NACL_PRIo32
32 #define NACL_PRIuNACL_REG NACL_PRIu32
33 #define NACL_PRIxNACL_REG NACL_PRIx32
34 #define NACL_PRIXNACL_REG NACL_PRIX32
35
36 /*
37 * NOTE: This struct needs to be synchronized with NACL_CALLEE_SAVE_LIST
38 */
39
40 struct NaClThreadContext {
41 nacl_reg_t s0, s1, s2, s3, s4, s5, s6, s7, t8;
42 /* 0 4 8 c 10 14 18 1c 20 */
43
44 nacl_reg_t stack_ptr, frame_ptr, prog_ctr;
45 /* 24 28 2c */
46
47 /*
48 * sys_ret and new_prog_ctr are not a part of the thread's register set,
49 * but are needed by NaClSwitch. By including them here, the two
50 * use the same interface.
51 */
52 uint32_t sysret;
53 /* 30 */
54 uint32_t new_prog_ctr;
55 /* 34 */
56 uint32_t trusted_stack_ptr;
57 /* 38 */
58 uint32_t tls_idx;
59 /* 3c */
60 uint32_t tls_value1;
61 /* 40 */
62 uint32_t tls_value2;
63 /* 44 */
64 uint32_t guard_token;
65 /* 48 */
66 };
67
NaClGetThreadCtxSp(struct NaClThreadContext * th_ctx)68 static INLINE uintptr_t NaClGetThreadCtxSp(struct NaClThreadContext *th_ctx) {
69 return th_ctx->stack_ptr;
70 }
71
72 NORETURN void NaClStartSwitch(struct NaClThreadContext *);
73
74 #endif /* !defined(__ASSEMBLER__) */
75
76 #define NACL_THREAD_CONTEXT_OFFSET_S0 0x00
77 #define NACL_THREAD_CONTEXT_OFFSET_S1 0x04
78 #define NACL_THREAD_CONTEXT_OFFSET_S2 0x08
79 #define NACL_THREAD_CONTEXT_OFFSET_S3 0x0c
80 #define NACL_THREAD_CONTEXT_OFFSET_S4 0x10
81 #define NACL_THREAD_CONTEXT_OFFSET_S5 0x14
82 #define NACL_THREAD_CONTEXT_OFFSET_S6 0x18
83 #define NACL_THREAD_CONTEXT_OFFSET_S7 0x1c
84 #define NACL_THREAD_CONTEXT_OFFSET_T8 0x20
85 #define NACL_THREAD_CONTEXT_OFFSET_STACK_PTR 0x24
86 #define NACL_THREAD_CONTEXT_OFFSET_FRAME_PTR 0x28
87 #define NACL_THREAD_CONTEXT_OFFSET_PROG_CTR 0x2c
88 #define NACL_THREAD_CONTEXT_OFFSET_SYSRET 0x30
89 #define NACL_THREAD_CONTEXT_OFFSET_NEW_PROG_CTR 0x34
90 #define NACL_THREAD_CONTEXT_OFFSET_TRUSTED_STACK_PTR 0x38
91 #define NACL_THREAD_CONTEXT_OFFSET_TLS_IDX 0x3c
92 #define NACL_THREAD_CONTEXT_OFFSET_TLS_VALUE1 0x40
93 #define NACL_THREAD_CONTEXT_OFFSET_TLS_VALUE2 0x44
94 #define NACL_THREAD_CONTEXT_OFFSET_GUARD_TOKEN 0x48
95
96 #if !defined(__ASSEMBLER__)
97
98 /*
99 * This function exists as a function only because compile-time
100 * assertions need to be inside a function. This function does not
101 * need to be called for the assertions to be checked.
102 */
NaClThreadContextOffsetCheck(void)103 static INLINE void NaClThreadContextOffsetCheck(void) {
104 int offset = 0;
105
106 #define NACL_CHECK_FIELD(offset_name, field) \
107 NACL_COMPILE_TIME_ASSERT(offset_name == \
108 offsetof(struct NaClThreadContext, field)); \
109 CHECK(offset == offset_name); \
110 offset += sizeof(((struct NaClThreadContext *) NULL)->field);
111
112 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_S0, s0);
113 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_S1, s1);
114 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_S2, s2);
115 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_S3, s3);
116 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_S4, s4);
117 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_S5, s5);
118 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_S6, s6);
119 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_S7, s7);
120 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_T8, t8);
121 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_STACK_PTR, stack_ptr);
122 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_FRAME_PTR, frame_ptr);
123 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_PROG_CTR, prog_ctr);
124 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_SYSRET, sysret);
125 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_NEW_PROG_CTR, new_prog_ctr);
126 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_TRUSTED_STACK_PTR,
127 trusted_stack_ptr);
128 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_TLS_IDX, tls_idx);
129 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_TLS_VALUE1, tls_value1);
130 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_TLS_VALUE2, tls_value2);
131 NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_GUARD_TOKEN, guard_token);
132 CHECK(offset == sizeof(struct NaClThreadContext));
133
134 #undef NACL_CHECK_FIELD
135 }
136
137 EXTERN_C_END
138
139 #endif /* !defined(__ASSEMBLER__) */
140
141 #endif /* __NATIVE_CLIENT_SERVICE_RUNTIME_ARCH_MIPS_SEL_RT_H___ */
142