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authorPatrick Georgi <patrick@georgi-clan.de>2012-11-25 17:31:25 +0100
committerPatrick Georgi <patrick@georgi-clan.de>2012-11-27 22:01:02 +0100
commit6999217ab6e4c8ed4c7f19a5578c36b01ad883ed (patch)
tree9aaf971665adeeeaa601f14e5249ed0941b8cb2c /src
parent23f38cd05c05ed1876febfa59b652cd7171027ca (diff)
downloadcoreboot-6999217ab6e4c8ed4c7f19a5578c36b01ad883ed.tar.xz
build system: Eliminate special case for c_start
c_start.o has a special case in the build system, which we can eliminate, somewhat simplifying the build. To ensure that the entry point is at the beginning, introduce a new section .textfirst that is placed appropriately. In principle the ENTRY() definition in the linker script should be enough, but better be safe. Change-Id: I9737f7f5731e12ceb2119eb432b0e09832bc53fa Signed-off-by: Patrick Georgi <patrick@georgi-clan.de> Reviewed-on: http://review.coreboot.org/1909 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src')
-rw-r--r--src/arch/x86/Makefile.inc6
-rw-r--r--src/arch/x86/coreboot_ram.ld1
-rw-r--r--src/arch/x86/lib/c_start.S2
3 files changed, 5 insertions, 4 deletions
diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index a7446df7c1..2555280456 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -161,12 +161,12 @@ else
$(CC) -nostdlib -nostartfiles -static -o $@ -L$(obj) -T $(src)/arch/x86/coreboot_ram.ld $<
endif
-$(objgenerated)/coreboot_ram.o: $(obj)/arch/x86/lib/c_start.ramstage.o $$(ramstage-objs) $(LIBGCC_FILE_NAME)
+$(objgenerated)/coreboot_ram.o: $$(ramstage-objs) $(LIBGCC_FILE_NAME)
@printf " CC $(subst $(obj)/,,$(@))\n"
ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
- $(LD) -m elf_i386 -r -o $@ $(obj)/arch/x86/lib/c_start.ramstage.o --wrap __divdi3 --wrap __udivdi3 --wrap __moddi3 --wrap __umoddi3 --start-group $(filter-out $(obj)/arch/x86/lib/c_start.ramstage.o,$(ramstage-objs)) $(LIBGCC_FILE_NAME) --end-group
+ $(LD) -m elf_i386 -r -o $@ --wrap __divdi3 --wrap __udivdi3 --wrap __moddi3 --wrap __umoddi3 --start-group $(ramstage-objs) $(LIBGCC_FILE_NAME) --end-group
else
- $(CC) -nostdlib -r -o $@ $(obj)/arch/x86/lib/c_start.ramstage.o -Wl,--wrap,__divdi3 -Wl,--wrap,__udivdi3 -Wl,--wrap,__moddi3 -Wl,--wrap,__umoddi3 -Wl,--start-group $(filter-out $(obj)/arch/x86/lib/c_start.ramstage.o,$(ramstage-objs)) $(LIBGCC_FILE_NAME) -Wl,--end-group
+ $(CC) -nostdlib -r -o $@ -Wl,--wrap,__divdi3 -Wl,--wrap,__udivdi3 -Wl,--wrap,__moddi3 -Wl,--wrap,__umoddi3 -Wl,--start-group $(ramstage-objs) $(LIBGCC_FILE_NAME) -Wl,--end-group
endif
################################################################################
diff --git a/src/arch/x86/coreboot_ram.ld b/src/arch/x86/coreboot_ram.ld
index 57ddd03c0d..a87a0e7e91 100644
--- a/src/arch/x86/coreboot_ram.ld
+++ b/src/arch/x86/coreboot_ram.ld
@@ -32,6 +32,7 @@ SECTIONS
*/
.text : {
_text = .;
+ *(.textfirst);
*(.text);
*(.text.*);
. = ALIGN(16);
diff --git a/src/arch/x86/lib/c_start.S b/src/arch/x86/lib/c_start.S
index a84724d7b9..9a8b4ac3c2 100644
--- a/src/arch/x86/lib/c_start.S
+++ b/src/arch/x86/lib/c_start.S
@@ -1,6 +1,6 @@
#include <cpu/x86/post_code.h>
- .section ".text"
+ .section ".textfirst"
.code32
.globl _start
_start: