9c0928045c
Leading underscores are ill-advised because such identifiers are reserved. Trailing underscores are merely ugly. Strip both. Our header guards commonly end in _H. Normalize the exceptions. Macros should be ALL_CAPS. Normalize the exception. Done with scripts/clean-header-guards.pl. include/hw/xen/interface/ and tools/virtiofsd/ left alone, because these were imported from Xen and libfuse respectively. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20220506134911.2856099-3-armbru@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
148 lines
4.6 KiB
C
148 lines
4.6 KiB
C
/*
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* openbsd ELF definitions
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*
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* Copyright (c) 2013 Stacey D. Son
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TARGET_OS_ELF_H
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#define TARGET_OS_ELF_H
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#include "target_arch_elf.h"
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#include "elf.h"
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/* this flag is uneffective under linux too, should be deleted */
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#ifndef MAP_DENYWRITE
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#define MAP_DENYWRITE 0
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#endif
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/* should probably go in elf.h */
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#ifndef ELIBBAD
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#define ELIBBAD 80
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#endif
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#ifndef ELF_PLATFORM
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#define ELF_PLATFORM (NULL)
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#endif
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#ifndef ELF_HWCAP
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#define ELF_HWCAP 0
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#endif
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#ifdef TARGET_ABI32
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#undef ELF_CLASS
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#define ELF_CLASS ELFCLASS32
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#undef bswaptls
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#define bswaptls(ptr) bswap32s(ptr)
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#endif
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/* max code+data+bss space allocated to elf interpreter */
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#define INTERP_MAP_SIZE (32 * 1024 * 1024)
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/* max code+data+bss+brk space allocated to ET_DYN executables */
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#define ET_DYN_MAP_SIZE (128 * 1024 * 1024)
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/* Necessary parameters */
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#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
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#define TARGET_ELF_PAGESTART(_v) ((_v) & \
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~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE - 1))
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#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE - 1))
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#define DLINFO_ITEMS 12
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static abi_ulong target_create_elf_tables(abi_ulong p, int argc, int envc,
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abi_ulong stringp,
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struct elfhdr *exec,
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abi_ulong load_addr,
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abi_ulong load_bias,
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abi_ulong interp_load_addr,
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struct image_info *info)
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{
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abi_ulong sp;
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int size;
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abi_ulong u_platform;
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const char *k_platform;
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const int n = sizeof(elf_addr_t);
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sp = p;
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u_platform = 0;
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k_platform = ELF_PLATFORM;
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if (k_platform) {
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size_t len = strlen(k_platform) + 1;
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sp -= (len + n - 1) & ~(n - 1);
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u_platform = sp;
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/* FIXME - check return value of memcpy_to_target() for failure */
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memcpy_to_target(sp, k_platform, len);
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}
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/*
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* Force 16 byte _final_ alignment here for generality.
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*/
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sp = sp & ~(abi_ulong)15;
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size = (DLINFO_ITEMS + 1) * 2;
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if (k_platform) {
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size += 2;
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}
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#ifdef DLINFO_ARCH_ITEMS
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size += DLINFO_ARCH_ITEMS * 2;
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#endif
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size += envc + argc + 2;
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size += 1; /* argc itself */
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size *= n;
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if (size & 15) {
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sp -= 16 - (size & 15);
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}
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/*
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* OpenBSD defines elf_addr_t as Elf32_Off / Elf64_Off
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*/
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#define NEW_AUX_ENT(id, val) do { \
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sp -= n; put_user_ual(val, sp); \
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sp -= n; put_user_ual(id, sp); \
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} while (0)
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NEW_AUX_ENT(AT_NULL, 0);
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/* There must be exactly DLINFO_ITEMS entries here. */
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NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff));
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NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof(struct elf_phdr)));
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NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
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NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
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NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr));
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NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
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NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry);
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NEW_AUX_ENT(AT_UID, (abi_ulong)getuid());
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NEW_AUX_ENT(AT_EUID, (abi_ulong)geteuid());
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NEW_AUX_ENT(AT_GID, (abi_ulong)getgid());
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NEW_AUX_ENT(AT_EGID, (abi_ulong)getegid());
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NEW_AUX_ENT(AT_HWCAP, (abi_ulong)ELF_HWCAP);
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NEW_AUX_ENT(AT_CLKTCK, (abi_ulong)sysconf(_SC_CLK_TCK));
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if (k_platform) {
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NEW_AUX_ENT(AT_PLATFORM, u_platform);
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}
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#ifdef ARCH_DLINFO
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/*
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* ARCH_DLINFO must come last so platform specific code can enforce
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* special alignment requirements on the AUXV if necessary (eg. PPC).
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*/
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ARCH_DLINFO;
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#endif
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#undef NEW_AUX_ENT
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sp = loader_build_argptr(envc, argc, sp, stringp);
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return sp;
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}
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#endif /* TARGET_OS_ELF_H */
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