Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20220120-1' into...
[qemu.git] / bsd-user / freebsd / target_os_elf.h
1 /*
2 * freebsd ELF definitions
3 *
4 * Copyright (c) 2013-15 Stacey D. Son
5 *
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.
10 *
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.
15 *
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/>.
18 */
19 #ifndef _TARGET_OS_ELF_H_
20 #define _TARGET_OS_ELF_H_
21
22 #include "target_arch_elf.h"
23 #include "elf.h"
24
25 #define bsd_get_ncpu() 1 /* until we pull in bsd-proc.[hc] */
26
27 /* this flag is uneffective under linux too, should be deleted */
28 #ifndef MAP_DENYWRITE
29 #define MAP_DENYWRITE 0
30 #endif
31
32 /* should probably go in elf.h */
33 #ifndef ELIBBAD
34 #define ELIBBAD 80
35 #endif
36
37 #ifndef ELF_PLATFORM
38 #define ELF_PLATFORM (NULL)
39 #endif
40
41 /* XXX Look at the other conflicting AT_* values. */
42 #define FREEBSD_AT_NCPUS 19
43 #define FREEBSD_AT_HWCAP 25
44 #define FREEBSD_AT_HWCAP2 26
45
46 #ifdef TARGET_ABI32
47 #undef ELF_CLASS
48 #define ELF_CLASS ELFCLASS32
49 #undef bswaptls
50 #define bswaptls(ptr) bswap32s(ptr)
51 #endif
52
53 /* max code+data+bss space allocated to elf interpreter */
54 #define INTERP_MAP_SIZE (32 * 1024 * 1024)
55
56 /* max code+data+bss+brk space allocated to ET_DYN executables */
57 #define ET_DYN_MAP_SIZE (128 * 1024 * 1024)
58
59 /* Necessary parameters */
60 #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
61 #define TARGET_ELF_PAGESTART(_v) ((_v) & \
62 ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE - 1))
63 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE - 1))
64
65 #define DLINFO_ITEMS 14
66
67 static abi_ulong target_create_elf_tables(abi_ulong p, int argc, int envc,
68 abi_ulong stringp,
69 struct elfhdr *exec,
70 abi_ulong load_addr,
71 abi_ulong load_bias,
72 abi_ulong interp_load_addr,
73 struct image_info *info)
74 {
75 abi_ulong features, sp;
76 int size;
77 const int n = sizeof(elf_addr_t);
78
79 target_auxents_sz = 0;
80 sp = p;
81 /*
82 * Force 16 byte _final_ alignment here for generality.
83 */
84 sp = sp & ~(abi_ulong)15;
85 size = (DLINFO_ITEMS + 1) * 2;
86 size += envc + argc + 2;
87 size += 1; /* argc itself */
88 size *= n;
89 if (size & 15) {
90 sp -= 16 - (size & 15);
91 }
92
93 /*
94 * FreeBSD defines elf_addr_t as Elf32_Off / Elf64_Off
95 */
96 #define NEW_AUX_ENT(id, val) do { \
97 sp -= n; put_user_ual(val, sp); \
98 sp -= n; put_user_ual(id, sp); \
99 target_auxents_sz += 2 * n; \
100 } while (0)
101
102 NEW_AUX_ENT(AT_NULL, 0);
103
104 /* There must be exactly DLINFO_ITEMS entries here. */
105 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff));
106 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof(struct elf_phdr)));
107 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
108 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
109 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr));
110 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
111 NEW_AUX_ENT(FREEBSD_AT_NCPUS, (abi_ulong)bsd_get_ncpu());
112 NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry);
113 features = ELF_HWCAP;
114 NEW_AUX_ENT(FREEBSD_AT_HWCAP, features);
115 #ifdef ELF_HWCAP2
116 features = ELF_HWCAP2;
117 NEW_AUX_ENT(FREEBSD_AT_HWCAP2, features);
118 #endif
119 NEW_AUX_ENT(AT_UID, (abi_ulong)getuid());
120 NEW_AUX_ENT(AT_EUID, (abi_ulong)geteuid());
121 NEW_AUX_ENT(AT_GID, (abi_ulong)getgid());
122 NEW_AUX_ENT(AT_EGID, (abi_ulong)getegid());
123 target_auxents = sp; /* Note where the aux entries are in the target */
124 #ifdef ARCH_DLINFO
125 /*
126 * ARCH_DLINFO must come last so platform specific code can enforce
127 * special alignment requirements on the AUXV if necessary (eg. PPC).
128 */
129 ARCH_DLINFO;
130 #endif
131 #undef NEW_AUX_ENT
132
133 sp = loader_build_argptr(envc, argc, sp, stringp);
134 return sp;
135 }
136
137 #endif /* _TARGET_OS_ELF_H_ */