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1 /*
2  * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3  * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without modification,
6  * are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice, this list of
9  *    conditions and the following disclaimer.
10  *
11  * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12  *    of conditions and the following disclaimer in the documentation and/or other materials
13  *    provided with the distribution.
14  *
15  * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16  *    to endorse or promote products derived from this software without specific prior written
17  *    permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 #ifndef _LOS_LOAD_ELF_H
33 #define _LOS_LOAD_ELF_H
34 
35 #include "los_ld_elf_pri.h"
36 #include "los_elf_auxvec_pri.h"
37 #include "los_process_pri.h"
38 #include "los_memory.h"
39 #include "los_strncpy_from_user.h"
40 #include "los_strnlen_user.h"
41 #include "los_user_put.h"
42 #include "los_user_get.h"
43 #include "user_copy.h"
44 #include "sys/stat.h"
45 #ifdef LOSCFG_DRIVERS_TZDRIVER
46 #include "fs/file.h"
47 #endif
48 #include "unistd.h"
49 
50 #ifdef __cplusplus
51 #if __cplusplus
52 extern "C" {
53 #endif /* __cplusplus */
54 #endif /* __cplusplus */
55 
56 #define INTERP_FULL_PATH                    "/lib/libc.so"
57 #define INVALID_FD                          (-1)
58 #define STRINGS_COUNT_MAX                   256
59 #define ELF_PHDR_NUM_MAX                    128
60 #define FILE_LENGTH_MAX                     0x1000000
61 #define MEM_SIZE_MAX                        0x1000000
62 
63 #ifndef FILE_PATH_MAX
64 #define FILE_PATH_MAX                       PATH_MAX
65 #endif
66 #ifndef FILE_PATH_MIN
67 #define FILE_PATH_MIN                       2
68 #endif
69 
70 #define USER_STACK_SIZE                     0x100000
71 #define USER_PARAM_BYTE_MAX                 0x1000
72 #define USER_STACK_TOP_MAX                  USER_ASPACE_TOP_MAX
73 
74 #define EXEC_MMAP_BASE                      0x02000000
75 
76 #ifdef LOSCFG_ASLR
77 #define RANDOM_MASK                         ((((USER_ASPACE_TOP_MAX + GB - 1) & (-GB)) >> 3) - 1)
78 #endif
79 
80 #define STACK_ALIGN_SIZE                    0x10
81 #define RANDOM_VECTOR_SIZE                  1
82 
83 /* The permissions on sections in the program header. */
84 #define PF_R                                0x4
85 #define PF_W                                0x2
86 #define PF_X                                0x1
87 
88 typedef struct {
89     LD_ELF_EHDR  elfEhdr;
90     LD_ELF_PHDR  *elfPhdr;
91     UINT32       fileLen;
92     INT32        procfd;
93 } ELFInfo;
94 
95 typedef struct {
96     ELFInfo      execInfo;
97     ELFInfo      interpInfo;
98     const CHAR   *fileName;
99     CHAR         *execName;
100     INT32        argc;
101     INT32        envc;
102     CHAR * const  *argv;
103     CHAR * const  *envp;
104     UINTPTR      stackTop;
105     UINTPTR      stackTopMax;
106     UINTPTR      stackBase;
107     UINTPTR      stackParamBase;
108     UINT32       stackSize;
109     INT32        stackProt;
110     UINTPTR      argStart;
111     UINTPTR      loadAddr;
112     UINTPTR      elfEntry;
113     UINTPTR      topOfMem;
114     UINTPTR      oldFiles;
115     LosVmSpace   *newSpace;
116     LosVmSpace   *oldSpace;
117     INT32        randomDevFD;
118 } ELFLoadInfo;
119 
OsIsBadUserAddress(VADDR_T vaddr)120 STATIC INLINE BOOL OsIsBadUserAddress(VADDR_T vaddr)
121 {
122     return (vaddr >= USER_STACK_TOP_MAX);
123 }
124 
125 extern UINT32 OsGetRndOffset(INT32 randomDevFD);
126 extern INT32 OsLoadELFFile(ELFLoadInfo *loadInfo);
127 
128 #ifdef __cplusplus
129 #if __cplusplus
130 }
131 #endif /* __cplusplus */
132 #endif /* __cplusplus */
133 
134 #endif /* _LOS_ELF_LIB_H */
135