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Thumbify & add END

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This commit is contained in:
matt 2013-08-17 01:07:45 +00:00
parent a311d23d12
commit d0837c3349
1 changed files with 14 additions and 5 deletions
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19
lib/libc/arch/arm/gen/alloca.S
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@ -1,4 +1,4 @@
/* $NetBSD: alloca.S,v 1.4 2004/08/21 11:20:10 rearnsha Exp $ */ /* $NetBSD: alloca.S,v 1.5 2013/08/17 01:07:45 matt Exp $ */
/* /*
* Copyright (c) 1995 Mark Brinicombe * Copyright (c) 1995 Mark Brinicombe
@ -37,8 +37,17 @@
#include <machine/asm.h> #include <machine/asm.h>
ENTRY(alloca) ENTRY(alloca)
add r0, r0, #0x00000007 /* round up to next 8 byte alignment */ adds r0, r0, #7 /* round up to next 8 byte alignment */
bic r0, r0, #0x00000007 #if !defined(__thumb__) || defined(_ARM_ARCH_T2)
sub sp, sp, r0 /* Adjust the stack pointer */ bics r0, r0, #7
mov r0, sp /* r0 = base of new space */ sub sp, sp, r0 /* Adjust the stack pointer */
mov r0, sp /* r0 = base of new space */
#else
lsrs r0, r0, #3
lsls r0, r0, #3
mov r1, sp
subs r0, r1, r0 /* Adjust the stack pointer */
mov sp, r0 /* r0 = base of new space */
#endif
RET RET
END(alloca)