Merge branch 'linus' into stackprotector

Conflicts:
	arch/x86/include/asm/pda.h
	kernel/fork.c

1 files changed, 87 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/reloc_64.S b/arch/powerpc/kernel/reloc_64.S
new file mode 100644
index 00000000000..b47a0e1ab00
--- /dev/null
+++ b/arch/powerpc/kernel/reloc_64.S
@@ -0,0 +1,87 @@
+/*
+ * Code to process dynamic relocations in the kernel.
+ *
+ * Copyright 2008 Paul Mackerras, IBM Corp.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version
+ *  2 of the License, or (at your option) any later version.
+ */
+
+#include <asm/ppc_asm.h>
+
+RELA = 7
+RELACOUNT = 0x6ffffff9
+R_PPC64_RELATIVE = 22
+
+/*
+ * r3 = desired final address of kernel
+ */
+_GLOBAL(relocate)
+	mflr	r0
+	bcl	20,31,$+4
+0:	mflr	r12		/* r12 has runtime addr of label 0 */
+	mtlr	r0
+	ld	r11,(p_dyn - 0b)(r12)
+	add	r11,r11,r12	/* r11 has runtime addr of .dynamic section */
+	ld	r9,(p_rela - 0b)(r12)
+	add	r9,r9,r12	/* r9 has runtime addr of .rela.dyn section */
+	ld	r10,(p_st - 0b)(r12)
+	add	r10,r10,r12	/* r10 has runtime addr of _stext */
+
+	/*
+	 * Scan the dynamic section for the RELA and RELACOUNT entries.
+	 */
+	li	r7,0
+	li	r8,0
+1:	ld	r6,0(r11)	/* get tag */
+	cmpdi	r6,0
+	beq	4f		/* end of list */
+	cmpdi	r6,RELA
+	bne	2f
+	ld	r7,8(r11)	/* get RELA pointer in r7 */
+	b	3f
+2:	addis	r6,r6,(-RELACOUNT)@ha
+	cmpdi	r6,RELACOUNT@l
+	bne	3f
+	ld	r8,8(r11)	/* get RELACOUNT value in r8 */
+3:	addi	r11,r11,16
+	b	1b
+4:	cmpdi	r7,0		/* check we have both RELA and RELACOUNT */
+	cmpdi	cr1,r8,0
+	beq	6f
+	beq	cr1,6f
+
+	/*
+	 * Work out linktime address of _stext and hence the
+	 * relocation offset to be applied.
+	 * cur_offset [r7] = rela.run [r9] - rela.link [r7]
+	 * _stext.link [r10] = _stext.run [r10] - cur_offset [r7]
+	 * final_offset [r3] = _stext.final [r3] - _stext.link [r10]
+	 */
+	subf	r7,r7,r9	/* cur_offset */
+	subf	r10,r7,r10
+	subf	r3,r10,r3	/* final_offset */
+
+	/*
+	 * Run through the list of relocations and process the
+	 * R_PPC64_RELATIVE ones.
+	 */
+	mtctr	r8
+5:	lwz	r0,12(9)	/* ELF64_R_TYPE(reloc->r_info) */
+	cmpwi	r0,R_PPC64_RELATIVE
+	bne	6f
+	ld	r6,0(r9)	/* reloc->r_offset */
+	ld	r0,16(r9)	/* reloc->r_addend */
+	add	r0,r0,r3
+	stdx	r0,r7,r6
+	addi	r9,r9,24
+	bdnz	5b
+
+6:	blr
+
+p_dyn:	.llong	__dynamic_start - 0b
+p_rela:	.llong	__rela_dyn_start - 0b
+p_st:	.llong	_stext - 0b
+