[coreboot-gerrit] Patch set updated for coreboot: 60db58e CAR_GLOBAL: Define section details once
Patrick Georgi (patrick@georgi-clan.de)
gerrit at coreboot.org
Mon Jan 20 12:57:33 CET 2014
Patrick Georgi (patrick at georgi-clan.de) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4716
-gerrit
commit 60db58e8b876963bee4b568c536bfb538a2b9e85
Author: Patrick Georgi <patrick at georgi-clan.de>
Date: Sat Jan 18 16:38:12 2014 +0100
CAR_GLOBAL: Define section details once
Improve clang compatibility by dropping an opaque hack
The section attribute was only ever meant for specifying
section names, not their properties - otherwise they would
have provided section(name,attribute,class) instead of only
section(name).
The hack to add attribute and class to the name, and commenting
out the "real" definitions inserted by the compiler (see the
terminating "#"), is refused by clang developers.
This is a cleaner implementation in that the section is first
declared with its properties, then used later-on, expecting that
later conflicting declarations are ignored.
It can still break in two ways:
1. The assembler or linker could complain about a section declared
in two different ways.
2. The assembler could just use the latest declaration, not the first,
to determine the section's properties.
I won't sort these out unless they actually happen.
Change-Id: I4640b0fc397b301102dde6dc3ea1a078ce9edf1c
Signed-off-by: Patrick Georgi <patrick at georgi-clan.de>
---
src/arch/x86/include/arch/early_variables.h | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/src/arch/x86/include/arch/early_variables.h b/src/arch/x86/include/arch/early_variables.h
index ba7df97..ea1a133 100644
--- a/src/arch/x86/include/arch/early_variables.h
+++ b/src/arch/x86/include/arch/early_variables.h
@@ -21,8 +21,12 @@
#define ARCH_EARLY_VARIABLES_H
#ifdef __PRE_RAM__
-#define CAR_GLOBAL __attribute__((section(".car.global_data,\"w\", at nobits#")))
-#define CAR_CBMEM __attribute__((section(".car.cbmem_console,\"w\", at nobits#")))
+asm(".section .car.global_data,\"w\", at nobits");
+asm(".previous");
+asm(".section .car.cbmem_console,\"w\", at nobits");
+asm(".previous");
+#define CAR_GLOBAL __attribute__((section(".car.global_data")))
+#define CAR_CBMEM __attribute__((section(".car.cbmem_console")))
#else
#define CAR_GLOBAL
#define CAR_CBMEM
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