[coreboot-gerrit] Patch set updated for coreboot: 60db58e CAR_GLOBAL: Define section details once

[Patrick Georgi]

Patrick Georgi ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4716

-gerrit

commit 60db58e8b876963bee4b568c536bfb538a2b9e85
Author: Patrick Georgi 
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 
---
 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",@nobits#")))
-#define CAR_CBMEM __attribute__((section(".car.cbmem_console,"w",@nobits#")))
+asm(".section .car.global_data,"w",@nobits");
+asm(".previous");
+asm(".section .car.cbmem_console,"w",@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