f6f0706cc2
Some architectures publish AT_HWCAP2 as well as AT_HWCAP. Those architectures will define ELF_HWCAP2 in their target_arch_elf.h files for the value for this process. If it is defined, then publish it. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
138 lines
4.5 KiB
C
138 lines
4.5 KiB
C
/*
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* freebsd ELF definitions
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*
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* Copyright (c) 2013-15 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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#define bsd_get_ncpu() 1 /* until we pull in bsd-proc.[hc] */
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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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/* XXX Look at the other conflicting AT_* values. */
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#define FREEBSD_AT_NCPUS 19
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#define FREEBSD_AT_HWCAP 25
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#define FREEBSD_AT_HWCAP2 26
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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 14
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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 features, sp;
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int size;
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const int n = sizeof(elf_addr_t);
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target_auxents_sz = 0;
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sp = p;
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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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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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* FreeBSD 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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target_auxents_sz += 2 * n; \
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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(FREEBSD_AT_NCPUS, (abi_ulong)bsd_get_ncpu());
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NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry);
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features = ELF_HWCAP;
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NEW_AUX_ENT(FREEBSD_AT_HWCAP, features);
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#ifdef ELF_HWCAP2
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features = ELF_HWCAP2;
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NEW_AUX_ENT(FREEBSD_AT_HWCAP2, features);
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#endif
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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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target_auxents = sp; /* Note where the aux entries are in the target */
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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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