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authorKumar Gala <galak@kernel.crashing.org>2008-04-16 05:52:28 +1000
committerPaul Mackerras <paulus@samba.org>2008-04-17 07:46:14 +1000
commit366234f657879aeb7a1e2ca582f2f24f3fae9269 (patch)
tree17dc5ce69cecc5ea61b78d8f71fb7d189e6a8e83 /arch/powerpc/kernel
parentd04ceb3fc294ea2c4f538a04343f3a473953a3b0 (diff)
[POWERPC] Update linker script to properly set physical addresses
We can set LOAD_OFFSET and use the AT attribute on sections and the linker will properly set the physical address of the LOAD program header for us. This allows us to know how the PHYSICAL_START the user configured a kernel with by just looking at the resulting vmlinux ELF. This is pretty much stolen from how x86 does things in their linker scripts. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/vmlinux.lds.S47
1 files changed, 23 insertions, 24 deletions
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index b5a76bcd95a..0c3000bf8d7 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -31,7 +31,7 @@ SECTIONS
*/
/* Text and gots */
- .text : {
+ .text : AT(ADDR(.text) - LOAD_OFFSET) {
ALIGN_FUNCTION();
*(.text.head)
_text = .;
@@ -56,7 +56,7 @@ SECTIONS
RODATA
/* Exception & bug tables */
- __ex_table : {
+ __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
__start___ex_table = .;
*(__ex_table)
__stop___ex_table = .;
@@ -72,7 +72,7 @@ SECTIONS
. = ALIGN(PAGE_SIZE);
__init_begin = .;
- .init.text : {
+ .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
_sinittext = .;
INIT_TEXT
_einittext = .;
@@ -81,11 +81,11 @@ SECTIONS
/* .exit.text is discarded at runtime, not link time,
* to deal with references from __bug_table
*/
- .exit.text : {
+ .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
EXIT_TEXT
}
- .init.data : {
+ .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
INIT_DATA
__vtop_table_begin = .;
*(.vtop_fixup);
@@ -101,19 +101,19 @@ SECTIONS
}
. = ALIGN(16);
- .init.setup : {
+ .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
__setup_start = .;
*(.init.setup)
__setup_end = .;
}
- .initcall.init : {
+ .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
__initcall_start = .;
INITCALLS
__initcall_end = .;
}
- .con_initcall.init : {
+ .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
__con_initcall_start = .;
*(.con_initcall.init)
__con_initcall_end = .;
@@ -122,14 +122,14 @@ SECTIONS
SECURITY_INIT
. = ALIGN(8);
- __ftr_fixup : {
+ __ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
__start___ftr_fixup = .;
*(__ftr_fixup)
__stop___ftr_fixup = .;
}
#ifdef CONFIG_PPC64
. = ALIGN(8);
- __fw_ftr_fixup : {
+ __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
__start___fw_ftr_fixup = .;
*(__fw_ftr_fixup)
__stop___fw_ftr_fixup = .;
@@ -137,14 +137,14 @@ SECTIONS
#endif
#ifdef CONFIG_BLK_DEV_INITRD
. = ALIGN(PAGE_SIZE);
- .init.ramfs : {
+ .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
__initramfs_start = .;
*(.init.ramfs)
__initramfs_end = .;
}
#endif
. = ALIGN(PAGE_SIZE);
- .data.percpu : {
+ .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) {
__per_cpu_start = .;
*(.data.percpu)
*(.data.percpu.shared_aligned)
@@ -152,7 +152,7 @@ SECTIONS
}
. = ALIGN(8);
- .machine.desc : {
+ .machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
__machine_desc_start = . ;
*(.machine.desc)
__machine_desc_end = . ;
@@ -170,25 +170,24 @@ SECTIONS
_sdata = .;
#ifdef CONFIG_PPC32
- .data :
- {
+ .data : AT(ADDR(.data) - LOAD_OFFSET) {
DATA_DATA
*(.sdata)
*(.got.plt) *(.got)
}
#else
- .data : {
+ .data : AT(ADDR(.data) - LOAD_OFFSET) {
DATA_DATA
*(.data.rel*)
*(.toc1)
*(.branch_lt)
}
- .opd : {
+ .opd : AT(ADDR(.opd) - LOAD_OFFSET) {
*(.opd)
}
- .got : {
+ .got : AT(ADDR(.got) - LOAD_OFFSET) {
__toc_start = .;
*(.got)
*(.toc)
@@ -205,26 +204,26 @@ SECTIONS
#else
. = ALIGN(16384);
#endif
- .data.init_task : {
+ .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
*(.data.init_task)
}
. = ALIGN(PAGE_SIZE);
- .data.page_aligned : {
+ .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
*(.data.page_aligned)
}
- .data.cacheline_aligned : {
+ .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
*(.data.cacheline_aligned)
}
. = ALIGN(L1_CACHE_BYTES);
- .data.read_mostly : {
+ .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
*(.data.read_mostly)
}
. = ALIGN(PAGE_SIZE);
- __data_nosave : {
+ .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
__nosave_begin = .;
*(.data.nosave)
. = ALIGN(PAGE_SIZE);
@@ -235,7 +234,7 @@ SECTIONS
* And finally the bss
*/
- .bss : {
+ .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
__bss_start = .;
*(.sbss) *(.scommon)
*(.dynbss)