Commit a4497235 authored by Olaf Hering's avatar Olaf Hering Committed by Paul Mackerras
Browse files

[PATCH] ppc64 boot: make the zImage relocateable

Make the zImage relocateable.  So yaboot could just load and run any ELF
binary, without worrying about its load address.
Signed-off-by: default avatarOlaf Hering <>
Cc: Benjamin Herrenschmidt <>
Cc: Anton Blanchard <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarPaul Mackerras <>
parent afbe8c4b
......@@ -22,7 +22,7 @@
HOSTCC := gcc
BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem $(shell $(CROSS32CC) -print-file-name=include)
BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem $(shell $(CROSS32CC) -print-file-name=include) -fPIC
BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
BOOTLFLAGS := -Ttext 0x00400000 -e _start -T $(srctree)/$(src)/
OBJCOPYFLAGS := contents,alloc,load,readonly,data
......@@ -14,9 +14,38 @@
.globl _start
bl reloc_offset
mflr r0
lis r9,reloc_offset@ha
addi r9,r9,reloc_offset@l
subf. r0,r9,r0
beq clear_caches
lis r9,__got2_start@ha
addi r9,r9,__got2_start@l
lis r8,__got2_end@ha
addi r8,r8,__got2_end@l
subf. r8,r9,r8
beq clear_caches
srwi. r8,r8,2
mtctr r8
add r9,r0,r9
lwz r8,0(r9)
add r8,r8,r0
stw r8,0(r9)
addi r9,r9,4
bdnz reloc_got2_loop
lis r9,_start@h
add r9,r0,r9
lis r8,_etext@ha
addi r8,r8,_etext@l
add r8,r0,r8
1: dcbf r0,r9
icbi r0,r9
addi r9,r9,0x20
......@@ -13,7 +13,9 @@ SECTIONS
__got2_start = .;
__got2_end = .;
. = ALIGN(4096);
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