diff options
Diffstat (limited to 'bsd-user/openbsd')
| -rw-r--r-- | bsd-user/openbsd/target_os_elf.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/bsd-user/openbsd/target_os_elf.h b/bsd-user/openbsd/target_os_elf.h new file mode 100644 index 0000000000..a5cfcd3aff --- /dev/null +++ b/bsd-user/openbsd/target_os_elf.h @@ -0,0 +1,146 @@ +/* + * openbsd ELF definitions + * + * Copyright (c) 2013 Stacey D. Son + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ +#ifndef _TARGET_OS_ELF_H_ +#define _TARGET_OS_ELF_H_ + +#include "target_arch_elf.h" +#include "elf.h" + +/* this flag is uneffective under linux too, should be deleted */ +#ifndef MAP_DENYWRITE +#define MAP_DENYWRITE 0 +#endif + +/* should probably go in elf.h */ +#ifndef ELIBBAD +#define ELIBBAD 80 +#endif + +#ifndef ELF_PLATFORM +#define ELF_PLATFORM (NULL) +#endif + +#ifndef ELF_HWCAP +#define ELF_HWCAP 0 +#endif + +#ifdef TARGET_ABI32 +#undef ELF_CLASS +#define ELF_CLASS ELFCLASS32 +#undef bswaptls +#define bswaptls(ptr) bswap32s(ptr) +#endif + +/* max code+data+bss space allocated to elf interpreter */ +#define INTERP_MAP_SIZE (32 * 1024 * 1024) + +/* max code+data+bss+brk space allocated to ET_DYN executables */ +#define ET_DYN_MAP_SIZE (128 * 1024 * 1024) + +/* Necessary parameters */ +#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE +#define TARGET_ELF_PAGESTART(_v) ((_v) & \ + ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE - 1)) +#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE - 1)) + +#define DLINFO_ITEMS 12 + +static abi_ulong target_create_elf_tables(abi_ulong p, int argc, int envc, + abi_ulong stringp, + struct elfhdr *exec, + abi_ulong load_addr, + abi_ulong load_bias, + abi_ulong interp_load_addr, + struct image_info *info) +{ + abi_ulong sp; + int size; + abi_ulong u_platform; + const char *k_platform; + const int n = sizeof(elf_addr_t); + + sp = p; + u_platform = 0; + k_platform = ELF_PLATFORM; + if (k_platform) { + size_t len = strlen(k_platform) + 1; + sp -= (len + n - 1) & ~(n - 1); + u_platform = sp; + /* FIXME - check return value of memcpy_to_target() for failure */ + memcpy_to_target(sp, k_platform, len); + } + /* + * Force 16 byte _final_ alignment here for generality. + */ + sp = sp & ~(abi_ulong)15; + size = (DLINFO_ITEMS + 1) * 2; + if (k_platform) { + size += 2; + } +#ifdef DLINFO_ARCH_ITEMS + size += DLINFO_ARCH_ITEMS * 2; +#endif + size += envc + argc + 2; + size += 1; /* argc itself */ + size *= n; + if (size & 15) { + sp -= 16 - (size & 15); + } + + /* + * OpenBSD defines elf_addr_t as Elf32_Off / Elf64_Off + */ +#define NEW_AUX_ENT(id, val) do { \ + sp -= n; put_user_ual(val, sp); \ + sp -= n; put_user_ual(id, sp); \ + } while (0) + + NEW_AUX_ENT(AT_NULL, 0); + + /* There must be exactly DLINFO_ITEMS entries here. */ + NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff)); + NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof(struct elf_phdr))); + NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum)); + NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE)); + NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr)); + NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0); + NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry); + NEW_AUX_ENT(AT_UID, (abi_ulong)getuid()); + NEW_AUX_ENT(AT_EUID, (abi_ulong)geteuid()); + NEW_AUX_ENT(AT_GID, (abi_ulong)getgid()); + NEW_AUX_ENT(AT_EGID, (abi_ulong)getegid()); + NEW_AUX_ENT(AT_HWCAP, (abi_ulong)ELF_HWCAP); + NEW_AUX_ENT(AT_CLKTCK, (abi_ulong)sysconf(_SC_CLK_TCK)); + if (k_platform) { + NEW_AUX_ENT(AT_PLATFORM, u_platform); + } +#ifdef ARCH_DLINFO + /* + * ARCH_DLINFO must come last so platform specific code can enforce + * special alignment requirements on the AUXV if necessary (eg. PPC). + */ + ARCH_DLINFO; +#endif +#undef NEW_AUX_ENT + + sp = loader_build_argptr(envc, argc, sp, stringp); + return sp; +} + +#endif /* _TARGET_OS_ELF_H_ */ |