2 * freebsd ELF definitions
4 * Copyright (c) 2013-15 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/>.
20 #ifndef TARGET_OS_ELF_H
21 #define TARGET_OS_ELF_H
23 #include "target_arch_elf.h"
25 #include "user/tswap-target.h"
27 #define bsd_get_ncpu() 1 /* until we pull in bsd-proc.[hc] */
29 /* this flag is uneffective under linux too, should be deleted */
31 #define MAP_DENYWRITE 0
34 /* should probably go in elf.h */
40 #define ELF_PLATFORM (NULL)
43 /* XXX Look at the other conflicting AT_* values. */
44 #define FREEBSD_AT_NCPUS 19
45 #define FREEBSD_AT_HWCAP 25
46 #define FREEBSD_AT_HWCAP2 26
50 #define ELF_CLASS ELFCLASS32
52 #define bswaptls(ptr) bswap32s(ptr)
55 /* max code+data+bss space allocated to elf interpreter */
56 #define INTERP_MAP_SIZE (32 * 1024 * 1024)
58 /* max code+data+bss+brk space allocated to ET_DYN executables */
59 #define ET_DYN_MAP_SIZE (128 * 1024 * 1024)
61 /* Necessary parameters */
62 #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
63 #define TARGET_ELF_PAGESTART(_v) ((_v) & \
64 ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE - 1))
65 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE - 1))
67 #define DLINFO_ITEMS 14
69 static abi_ulong
target_create_elf_tables(abi_ulong p
, int argc
, int envc
,
74 abi_ulong interp_load_addr
,
75 struct image_info
*info
)
77 abi_ulong features
, sp
;
79 const int n
= sizeof(elf_addr_t
);
81 target_auxents_sz
= 0;
84 * Force 16 byte _final_ alignment here for generality.
86 sp
= sp
& ~(abi_ulong
)15;
87 size
= (DLINFO_ITEMS
+ 1) * 2;
88 size
+= envc
+ argc
+ 2;
89 size
+= 1; /* argc itself */
92 sp
-= 16 - (size
& 15);
96 * FreeBSD defines elf_addr_t as Elf32_Off / Elf64_Off
98 #define NEW_AUX_ENT(id, val) do { \
99 sp -= n; put_user_ual(val, sp); \
100 sp -= n; put_user_ual(id, sp); \
101 target_auxents_sz += 2 * n; \
104 NEW_AUX_ENT(AT_NULL
, 0);
106 /* There must be exactly DLINFO_ITEMS entries here. */
107 NEW_AUX_ENT(AT_PHDR
, (abi_ulong
)(load_addr
+ exec
->e_phoff
));
108 NEW_AUX_ENT(AT_PHENT
, (abi_ulong
)(sizeof(struct elf_phdr
)));
109 NEW_AUX_ENT(AT_PHNUM
, (abi_ulong
)(exec
->e_phnum
));
110 NEW_AUX_ENT(AT_PAGESZ
, (abi_ulong
)(TARGET_PAGE_SIZE
));
111 NEW_AUX_ENT(AT_BASE
, (abi_ulong
)(interp_load_addr
));
112 NEW_AUX_ENT(AT_FLAGS
, (abi_ulong
)0);
113 NEW_AUX_ENT(FREEBSD_AT_NCPUS
, (abi_ulong
)bsd_get_ncpu());
114 NEW_AUX_ENT(AT_ENTRY
, load_bias
+ exec
->e_entry
);
115 features
= ELF_HWCAP
;
116 NEW_AUX_ENT(FREEBSD_AT_HWCAP
, features
);
118 features
= ELF_HWCAP2
;
119 NEW_AUX_ENT(FREEBSD_AT_HWCAP2
, features
);
121 NEW_AUX_ENT(AT_UID
, (abi_ulong
)getuid());
122 NEW_AUX_ENT(AT_EUID
, (abi_ulong
)geteuid());
123 NEW_AUX_ENT(AT_GID
, (abi_ulong
)getgid());
124 NEW_AUX_ENT(AT_EGID
, (abi_ulong
)getegid());
125 target_auxents
= sp
; /* Note where the aux entries are in the target */
128 * ARCH_DLINFO must come last so platform specific code can enforce
129 * special alignment requirements on the AUXV if necessary (eg. PPC).
135 sp
= loader_build_argptr(envc
, argc
, sp
, stringp
);
139 #endif /* TARGET_OS_ELF_H */