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Add PIC_GOTSETUP and PIC_TOCSETUP which replace the old methods to get the

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GOT (via a bl) to the new REL16 based relocs.  This is another step to
supporting secure plt.
This commit is contained in:
matt 2011-01-16 02:41:55 +00:00
parent b094d98191
commit 810e7ea289
1 changed files with 21 additions and 1 deletions
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22
sys/arch/powerpc/include/asm.h
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@ -1,4 +1,4 @@
/* $NetBSD: asm.h,v 1.31 2011/01/15 07:23:49 matt Exp $ */
/* $NetBSD: asm.h,v 1.32 2011/01/16 02:41:55 matt Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
@ -46,6 +46,24 @@
#define PIC_PROLOGUE XXX
#define PIC_EPILOGUE XXX
#define PIC_PLT(x) x@plt
#ifdef __STDC__
#define PIC_TOCNAME(name) .LCTOC_##name
#else
#define PIC_TOCNAME(name) .LCTOC_/**/name
#endif
#define PIC_TOCSETUP(name, reg) \
.pushsection ".got2","aw" ;\
PIC_TOCNAME(name) = . + 32768 ;\
.popsection ;\
bcl 20,31,1001f ;\
1001: mflr reg ;\
addis reg,reg,PIC_TOCNAME(name)-1001b@ha ;\
addi reg,reg,PIC_TOCNAME(name)-1001b@l
#define PIC_GOTSETUP(reg) \
bcl 20,31,2002f ;\
2002: mflr reg ;\
addis reg,reg,_GLOBAL_OFFSET_TABLE_-2002b@ha ;\
addi reg,reg,_GLOBAL_OFFSET_TABLE_-2002b@l
#ifdef __STDC__
#define PIC_GOT(x) XXX
#define PIC_GOTOFF(x) XXX
@ -59,6 +77,8 @@
#define PIC_PLT(x) x
#define PIC_GOT(x) x
#define PIC_GOTOFF(x) x
#define PIC_GOTSETUP(r)
#define PIC_TOCSETUP(n, r)
#endif
#endif