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uml: borrow const.h techniques

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Suggested by Geert Uytterhoeven - use const.h to get constants that are usable
in both C and assembly.  I can't include it directly since this code can't
include kernel headers.  const.h is also for numeric constants that can be
typed by tacking a "UL" or similar on the end.  The constants here have to be
typed by casting them.

So, the relevant parts of const.h are copied here and modified in order to
allow the constants to be uncasted in assembly and casted in C.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jeff Dike
2008-02-04 22:30:44 -08:00
committed by Linus Torvalds
parent ee56314b79
commit 4bdf8bc4a1
3 changed files with 29 additions and 21 deletions
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8
arch/um/sys-i386/stub.S
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@ -7,7 +7,7 @@
.globl batch_syscall_stub
batch_syscall_stub:
/* load pointer to first operation */
mov $(ASM_STUB_DATA+8), %esp
mov $(STUB_DATA+8), %esp
again:
/* load length of additional data */
@ -15,12 +15,12 @@ again:
/* if(length == 0) : end of list */
/* write possible 0 to header */
mov %eax, ASM_STUB_DATA+4
mov %eax, STUB_DATA+4
cmpl $0, %eax
jz done
/* save current pointer */
mov %esp, ASM_STUB_DATA+4
mov %esp, STUB_DATA+4
/* skip additional data */
add %eax, %esp
@ -46,7 +46,7 @@ again:
done:
/* save return value */
mov %eax, ASM_STUB_DATA
mov %eax, STUB_DATA
/* stop */
int3