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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2012-09-05 13:26:11 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-09-26 15:45:10 +0200 |
| commit | eb608fb366de123a97227437e5306f731f4a63c5 (patch) | |
| tree | 6466e9b0bcd942457e0aa251af48816e3e925d90 /arch/s390/include/asm/processor.h | |
| parent | 24996edce547fd981c089db9a12717fd76a51160 (diff) | |
| download | linux-eb608fb366de123a97227437e5306f731f4a63c5.tar.gz linux-eb608fb366de123a97227437e5306f731f4a63c5.tar.bz2 linux-eb608fb366de123a97227437e5306f731f4a63c5.zip | |
s390/exceptions: switch to relative exception table entries
This is the s390 port of 70627654 "x86, extable: Switch to relative
exception table entries".
Reduces the size of our exception tables by 50% on 64 bit builds.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/processor.h')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 42 |
1 files changed, 24 insertions, 18 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 7e81ff17a89b..f3e0aabfc6bc 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -11,6 +11,8 @@ #ifndef __ASM_S390_PROCESSOR_H #define __ASM_S390_PROCESSOR_H +#ifndef __ASSEMBLY__ + #include <linux/linkage.h> #include <linux/irqflags.h> #include <asm/cpu.h> @@ -348,23 +350,6 @@ extern void (*s390_base_ext_handler_fn)(void); #define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL -/* - * Helper macro for exception table entries - */ -#ifndef CONFIG_64BIT -#define EX_TABLE(_fault,_target) \ - ".section __ex_table,\"a\"\n" \ - " .align 4\n" \ - " .long " #_fault "," #_target "\n" \ - ".previous\n" -#else -#define EX_TABLE(_fault,_target) \ - ".section __ex_table,\"a\"\n" \ - " .align 8\n" \ - " .quad " #_fault "," #_target "\n" \ - ".previous\n" -#endif - extern int memcpy_real(void *, void *, size_t); extern void memcpy_absolute(void *, void *, size_t); @@ -375,4 +360,25 @@ extern void memcpy_absolute(void *, void *, size_t); memcpy_absolute(&(dest), &__tmp, sizeof(__tmp)); \ } -#endif /* __ASM_S390_PROCESSOR_H */ +/* + * Helper macro for exception table entries + */ +#define EX_TABLE(_fault, _target) \ + ".section __ex_table,\"a\"\n" \ + ".align 4\n" \ + ".long (" #_fault ") - .\n" \ + ".long (" #_target ") - .\n" \ + ".previous\n" + +#else /* __ASSEMBLY__ */ + +#define EX_TABLE(_fault, _target) \ + .section __ex_table,"a" ; \ + .align 4 ; \ + .long (_fault) - . ; \ + .long (_target) - . ; \ + .previous + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_S390_PROCESSOR_H */ |