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293f71435d
Historically the code to set up AT_HWCAP and AT_PLATFORM was only built for 32bit x86 as it was intermingled with the vDSO passthrough code. Now that vDSO passthrough has been removed, always pass through AT_HWCAP and AT_PLATFORM. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://patch.msgid.link/20251028-uml-remove-32bit-pseudo-vdso-v1-10-e930063eff5f@weissschuh.net Signed-off-by: Johannes Berg <johannes.berg@intel.com>
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* arch/um/kernel/elf_aux.c
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*
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* Scan the ELF auxiliary vector provided by the host to extract
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* information about vsyscall-page, etc.
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*
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* Copyright (C) 2004 Fujitsu Siemens Computers GmbH
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* Author: Bodo Stroesser (bodo.stroesser@fujitsu-siemens.com)
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*/
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#include <elf.h>
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#include <stddef.h>
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#include <init.h>
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#include <elf_user.h>
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#include <mem_user.h>
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#include "internal.h"
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#include <linux/swab.h>
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#if __BITS_PER_LONG == 64
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typedef Elf64_auxv_t elf_auxv_t;
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#else
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typedef Elf32_auxv_t elf_auxv_t;
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#endif
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/* These are initialized very early in boot and never changed */
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char * elf_aux_platform;
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long elf_aux_hwcap;
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__init void scan_elf_aux( char **envp)
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{
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elf_auxv_t * auxv;
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while ( *envp++ != NULL) ;
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for ( auxv = (elf_auxv_t *)envp; auxv->a_type != AT_NULL; auxv++) {
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switch ( auxv->a_type ) {
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case AT_HWCAP:
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elf_aux_hwcap = auxv->a_un.a_val;
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break;
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case AT_PLATFORM:
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/* elf.h removed the pointer elements from
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* a_un, so we have to use a_val, which is
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* all that's left.
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*/
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elf_aux_platform =
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(char *) (long) auxv->a_un.a_val;
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break;
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}
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}
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}
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