linux/arch/parisc/include/asm/linkage.h
Helge Deller 8801ccb9fa parisc: Fix boot failure of 64-bit kernel
Commit c8921d72e3 ("parisc: Fix and improve kernel stack unwinding")
broke booting of 64-bit kernels. On 64-bit kernels function pointers are
actually function descriptors which require dereferencing. In this patch
we instead declare functions in assembly code which are referenced from
C-code as external data pointers with the ENTRY() macro and thus can use
a simple external reference to the functions.

Signed-off-by: Helge Deller <deller@gmx.de>
Fixes: c8921d72e3 ("parisc: Fix and improve kernel stack unwinding")
2018-08-21 14:32:44 +02:00

41 lines
738 B
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_PARISC_LINKAGE_H
#define __ASM_PARISC_LINKAGE_H
#include <asm/dwarf.h>
#ifndef __ALIGN
#define __ALIGN .align 4
#define __ALIGN_STR ".align 4"
#endif
/*
* In parisc assembly a semicolon marks a comment while a
* exclamation mark is used to separate independent lines.
*/
#define ASM_NL !
#ifdef __ASSEMBLY__
#define ENTRY(name) \
ALIGN !\
name: ASM_NL\
.export name
#define ENTRY_CFI(name, ...) \
ENTRY(name) ASM_NL\
.proc ASM_NL\
.callinfo __VA_ARGS__ ASM_NL\
.entry ASM_NL\
CFI_STARTPROC
#define ENDPROC_CFI(name) \
CFI_ENDPROC ASM_NL\
.exit ASM_NL\
.procend ASM_NL\
ENDPROC(name)
#endif /* __ASSEMBLY__ */
#endif /* __ASM_PARISC_LINKAGE_H */