x86, boot: make symbols from the main vmlinux available

Make symbols from the main vmlinux, as opposed to just
compressed/vmlinux, available to header.S.  Also, export a few
additional symbols.

This will be used in a subsequent patch to export the total memory
footprint of the kernel.

[ Impact: enable future enhancement ]

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile
index 6633b6e..75e0301 100644 (file)
--- a/arch/x86/boot/Makefile
+++ b/arch/x86/boot/Makefile
@@ -86,19 +86,27 @@ $(obj)/vmlinux.bin: $(obj)/compressed/vmlinux FORCE
 
 SETUP_OBJS = $(addprefix $(obj)/,$(setup-y))
 
-sed-offsets := -e 's/^00*/0/' \
-        -e 's/^\([0-9a-fA-F]*\) . \(input_data\|input_data_end\)$$/\#define \2 0x\1/p'
+sed-voffset := -e 's/^\([0-9a-fA-F]*\) . \(_text\|_end\)$$/\#define VO_\2 0x\1/p'
 
-quiet_cmd_offsets = OFFSETS $@
-      cmd_offsets = $(NM) $< | sed -n $(sed-offsets) > $@
+quiet_cmd_voffset = VOFFSET $@
+      cmd_voffset = $(NM) $< | sed -n $(sed-voffset) > $@
 
-$(obj)/offsets.h: $(obj)/compressed/vmlinux FORCE
-       $(call if_changed,offsets)
+targets += voffset.h
+$(obj)/voffset.h: vmlinux FORCE
+       $(call if_changed,voffset)
+
+sed-zoffset := -e 's/^\([0-9a-fA-F]*\) . \(input_data\|_end\|z_.*\)$$/\#define ZO_\2 0x\1/p'
+
+quiet_cmd_zoffset = ZOFFSET $@
+      cmd_zoffset = $(NM) $< | sed -n $(sed-zoffset) > $@
+
+targets += zoffset.h
+$(obj)/zoffset.h: $(obj)/compressed/vmlinux FORCE
+       $(call if_changed,zoffset)
 
-targets += offsets.h
 
 AFLAGS_header.o += -I$(obj)
-$(obj)/header.o: $(obj)/offsets.h
+$(obj)/header.o: $(obj)/voffset.h $(obj)/zoffset.h
 
 LDFLAGS_setup.elf      := -T
 $(obj)/setup.elf: $(src)/setup.ld $(SETUP_OBJS) FORCE

diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S
index 5d84d1c..2728514 100644 (file)
--- a/arch/x86/boot/header.S
+++ b/arch/x86/boot/header.S
@@ -22,7 +22,8 @@
 #include <asm/page_types.h>
 #include <asm/setup.h>
 #include "boot.h"
-#include "offsets.h"
+#include "voffset.h"
+#include "zoffset.h"
 
 BOOTSEG                = 0x07C0                /* original address of boot-sector */
 SYSSEG         = 0x1000                /* historical load address >> 4 */
@@ -212,8 +213,8 @@ hardware_subarch:   .long 0                 # subarchitecture, added with 2.07
 
 hardware_subarch_data: .quad 0
 
-payload_offset:                .long input_data
-payload_length:                .long input_data_end-input_data
+payload_offset:                .long ZO_input_data
+payload_length:                .long ZO_z_input_len
 
 setup_data:            .quad 0                 # 64-bit physical pointer to
                                                # single linked list of