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x86, boot: Use .code16 instead of .code16gcc

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This reverts commit 28b48688 ("x86, boot: use .code16gcc instead
of .code16").

Versions of binutils older than 2.16 are already not working, so this
workaround is no longer necessary either.  At the same time, some of
the transformations that .code16gcc does can be *extremely*
counterintuitive to a human programmer.

[ hpa: folded ret -> retl and call -> calll fixes from followup patch ]

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Link: http://lkml.kernel.org/r/1388788242.2391.75.camel@shinybook.infradead.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
David Woodhouse 2014-01-03 22:30:42 +00:00 committed by H. Peter Anvin
parent df90ca9690
commit e24df921af
2 changed files with 12 additions and 12 deletions
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2
arch/x86/boot/bioscall.S
View File

@ -13,7 +13,7 @@
* touching registers they shouldn't be. * touching registers they shouldn't be.
*/ */
.code16gcc .code16
.text .text
.globl intcall .globl intcall
.type intcall, @function .type intcall, @function

22
arch/x86/boot/copy.S
View File

@ -14,7 +14,7 @@
* Memory copy routines * Memory copy routines
*/ */
.code16gcc .code16
.text .text
GLOBAL(memcpy) GLOBAL(memcpy)
@ -30,7 +30,7 @@ GLOBAL(memcpy)
rep; movsb rep; movsb
popw %di popw %di
popw %si popw %si
ret retl
ENDPROC(memcpy) ENDPROC(memcpy)
GLOBAL(memset) GLOBAL(memset)
@ -45,25 +45,25 @@ GLOBAL(memset)
andw $3, %cx andw $3, %cx
rep; stosb rep; stosb
popw %di popw %di
ret retl
ENDPROC(memset) ENDPROC(memset)
GLOBAL(copy_from_fs) GLOBAL(copy_from_fs)
pushw %ds pushw %ds
pushw %fs pushw %fs
popw %ds popw %ds
call memcpy calll memcpy
popw %ds popw %ds
ret retl
ENDPROC(copy_from_fs) ENDPROC(copy_from_fs)
GLOBAL(copy_to_fs) GLOBAL(copy_to_fs)
pushw %es pushw %es
pushw %fs pushw %fs
popw %es popw %es
call memcpy calll memcpy
popw %es popw %es
ret retl
ENDPROC(copy_to_fs) ENDPROC(copy_to_fs)
#if 0 /* Not currently used, but can be enabled as needed */ #if 0 /* Not currently used, but can be enabled as needed */
@ -71,17 +71,17 @@ GLOBAL(copy_from_gs)
pushw %ds pushw %ds
pushw %gs pushw %gs
popw %ds popw %ds
call memcpy calll memcpy
popw %ds popw %ds
ret retl
ENDPROC(copy_from_gs) ENDPROC(copy_from_gs)
GLOBAL(copy_to_gs) GLOBAL(copy_to_gs)
pushw %es pushw %es
pushw %gs pushw %gs
popw %es popw %es
call memcpy calll memcpy
popw %es popw %es
ret retl
ENDPROC(copy_to_gs) ENDPROC(copy_to_gs)
#endif #endif