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287d6070ac
Currently there are some variables in the purgatory (e.g. kernel_entry) which are defined twice, once in assembler- and once in c-code. The reason for this is that these variables are set during purgatory load, where sanity checks on the corresponding Elf_Sym's are made, while they are used in assembler-code. Thus adding a second definition in c-code is a handy workaround to guarantee correct Elf_Sym's are created. When the purgatory is compiled with -fcommon (default for gcc on s390) this is no problem because both symbols are merged by the linker. However this is not required by ISO C and when the purgatory is built with -fno-common the linker fails with errors like arch/s390/purgatory/purgatory.o:(.bss+0x18): multiple definition of `kernel_entry' arch/s390/purgatory/head.o:/.../arch/s390/purgatory/head.S:230: first defined here Thus remove the duplicate definitions and add the required size and type information to the assembler definition. Also add -fno-common to the command line options to prevent similar hacks in the future. Signed-off-by: Philipp Rudo <prudo@linux.ibm.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
18 lines
329 B
C
18 lines
329 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright IBM Corp. 2018
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*
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* Author(s): Philipp Rudo <prudo@linux.vnet.ibm.com>
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*/
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#ifndef _S390_PURGATORY_H_
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#define _S390_PURGATORY_H_
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#ifndef __ASSEMBLY__
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#include <linux/purgatory.h>
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int verify_sha256_digest(void);
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#endif /* __ASSEMBLY__ */
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#endif /* _S390_PURGATORY_H_ */
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