2 * netbsd ELF definitions
4 * Copyright (c) 2013 Stacey D. Son
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 #ifndef _TARGET_OS_ELF_H_
20 #define _TARGET_OS_ELF_H_
22 #include "target_arch_elf.h"
25 /* this flag is uneffective under linux too, should be deleted */
27 #define MAP_DENYWRITE 0
30 /* should probably go in elf.h */
36 #define ELF_PLATFORM (NULL)
45 #define ELF_CLASS ELFCLASS32
47 #define bswaptls(ptr) bswap32s(ptr)
50 /* max code+data+bss space allocated to elf interpreter */
51 #define INTERP_MAP_SIZE (32 * 1024 * 1024)
53 /* max code+data+bss+brk space allocated to ET_DYN executables */
54 #define ET_DYN_MAP_SIZE (128 * 1024 * 1024)
56 /* Necessary parameters */
57 #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
58 #define TARGET_ELF_PAGESTART(_v) ((_v) & \
59 ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE - 1))
60 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE - 1))
62 #define DLINFO_ITEMS 12
64 static abi_ulong
target_create_elf_tables(abi_ulong p
, int argc
, int envc
,
69 abi_ulong interp_load_addr
,
70 struct image_info
*info
)
75 const char *k_platform
;
76 const int n
= sizeof(elf_addr_t
);
80 k_platform
= ELF_PLATFORM
;
82 size_t len
= strlen(k_platform
) + 1;
83 sp
-= (len
+ n
- 1) & ~(n
- 1);
85 /* FIXME - check return value of memcpy_to_target() for failure */
86 memcpy_to_target(sp
, k_platform
, len
);
89 * Force 16 byte _final_ alignment here for generality.
91 sp
= sp
& ~(abi_ulong
)15;
92 size
= (DLINFO_ITEMS
+ 1) * 2;
96 #ifdef DLINFO_ARCH_ITEMS
97 size
+= DLINFO_ARCH_ITEMS
* 2;
99 size
+= envc
+ argc
+ 2;
100 size
+= 1; /* argc itself */
103 sp
-= 16 - (size
& 15);
107 * NetBSD defines elf_addr_t as Elf32_Off / Elf64_Off
109 #define NEW_AUX_ENT(id, val) do { \
110 sp -= n; put_user_ual(val, sp); \
111 sp -= n; put_user_ual(id, sp); \
114 NEW_AUX_ENT(AT_NULL
, 0);
116 /* There must be exactly DLINFO_ITEMS entries here. */
117 NEW_AUX_ENT(AT_PHDR
, (abi_ulong
)(load_addr
+ exec
->e_phoff
));
118 NEW_AUX_ENT(AT_PHENT
, (abi_ulong
)(sizeof(struct elf_phdr
)));
119 NEW_AUX_ENT(AT_PHNUM
, (abi_ulong
)(exec
->e_phnum
));
120 NEW_AUX_ENT(AT_PAGESZ
, (abi_ulong
)(TARGET_PAGE_SIZE
));
121 NEW_AUX_ENT(AT_BASE
, (abi_ulong
)(interp_load_addr
));
122 NEW_AUX_ENT(AT_FLAGS
, (abi_ulong
)0);
123 NEW_AUX_ENT(AT_ENTRY
, load_bias
+ exec
->e_entry
);
124 NEW_AUX_ENT(AT_UID
, (abi_ulong
)getuid());
125 NEW_AUX_ENT(AT_EUID
, (abi_ulong
)geteuid());
126 NEW_AUX_ENT(AT_GID
, (abi_ulong
)getgid());
127 NEW_AUX_ENT(AT_EGID
, (abi_ulong
)getegid());
128 NEW_AUX_ENT(AT_HWCAP
, (abi_ulong
)ELF_HWCAP
);
129 NEW_AUX_ENT(AT_CLKTCK
, (abi_ulong
)sysconf(_SC_CLK_TCK
));
131 NEW_AUX_ENT(AT_PLATFORM
, u_platform
);
135 * ARCH_DLINFO must come last so platform specific code can enforce
136 * special alignment requirements on the AUXV if necessary (eg. PPC).
142 sp
= loader_build_argptr(envc
, argc
, sp
, stringp
);
146 #endif /* _TARGET_OS_ELF_H_ */