diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-04-21 14:17:25 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-05-08 17:33:50 +0100 |
| commit | 14327c662822e5e874cb971a7162067519300ca8 (patch) | |
| tree | 3d3424072fa6ef753c8ffaa2eb79005574149a3e /arch/arm/include/asm/assembler.h | |
| parent | 5890298a834c04aaa9b5fb576e5f2b77e79ab38d (diff) | |
ARM: replace BSYM() with badr assembly macro
BSYM() was invented to allow us to work around a problem with the
assembler, where local symbols resolved by the assembler for the 'adr'
instruction did not take account of their ISA.
Since we don't want BSYM() used elsewhere, replace BSYM() with a new
macro 'badr', which is like the 'adr' pseudo-op, but with the BSYM()
mechanics integrated into it. This ensures that the BSYM()-ification
is only used in conjunction with 'adr'.
Acked-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/assembler.h')
| -rw-r--r-- | arch/arm/include/asm/assembler.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h index 186270b3e194..4abe57279c66 100644 --- a/arch/arm/include/asm/assembler.h +++ b/arch/arm/include/asm/assembler.h @@ -178,6 +178,21 @@ .endm /* + * Assembly version of "adr rd, BSYM(sym)". This should only be used to + * reference local symbols in the same assembly file which are to be + * resolved by the assembler. Other usage is undefined. + */ + .irp c,,eq,ne,cs,cc,mi,pl,vs,vc,hi,ls,ge,lt,gt,le,hs,lo + .macro badr\c, rd, sym +#ifdef CONFIG_THUMB2_KERNEL + adr\c \rd, \sym + 1 +#else + adr\c \rd, \sym +#endif + .endm + .endr + +/* * Get current thread_info. */ .macro get_thread_info, rd @@ -326,7 +341,7 @@ THUMB( orr \reg , \reg , #PSR_T_BIT ) bne 1f orr \reg, \reg, #PSR_A_BIT - adr lr, BSYM(2f) + badr lr, 2f msr spsr_cxsf, \reg __MSR_ELR_HYP(14) __ERET |