New patch to review for coreboot: 90c6f69 x86 romstage.ld: handle the AGESA special case in the linker script

[Patrick Georgi]

Patrick Georgi ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/7307

-gerrit

commit 90c6f69ae987d51cabacdfcbadbde80168103b93
Author: Patrick Georgi 
Date:   Sat Nov 1 00:02:50 2014 +0100

x86 romstage.ld: handle the AGESA special case in the linker script

Move the .illegal_globals definition lower in the romstage linker script
    to make some versions of ld happy.

Also add a special case for AGESA files (which host a bunch of globals
    that could be const, but aren't) here, so they're ignored from the start
    instead of failing the test, then have the Makefile ignore the test result.

Change-Id: Ib533b7516135d2d3cab2bfda50d69c132c68e261
    Signed-off-by: Patrick Georgi 
---
 src/arch/x86/Makefile.inc     |  2 +-
 src/arch/x86/init/romstage.ld | 28 +++++++++++++++-------------
 2 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index 7ca3ca4..55266f6 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -217,7 +217,7 @@ endif
    $(OBJCOPY_romstage) --only-section .illegal_globals $(@) $(objcbfs)/romstage_null.offenders && \
    $(NM_romstage) $(objcbfs)/romstage_null.offenders | grep -q ""; if [ $$? -eq 0 ]; then \
    	echo "Forbidden global variables in romstage:"; \
-		$(NM_romstage) $(objcbfs)/romstage_null.offenders; test "$(CONFIG_CPU_AMD_AGESA)" = y; \
+		$(NM_romstage) $(objcbfs)/romstage_null.offenders; false; \
    	else true; fi

$(objcbfs)/romstage_xip.debug: $$(romstage-objs) $(objgenerated)/romstage_xip.ld $$(romstage-libs)
diff --git a/src/arch/x86/init/romstage.ld b/src/arch/x86/init/romstage.ld
index f4a4dde..56b096e 100644
--- a/src/arch/x86/init/romstage.ld
+++ b/src/arch/x86/init/romstage.ld
@@ -43,19 +43,6 @@ SECTIONS
    	_erom = .;
    }

-	/* Global variables are not allowed in romstage
-	 * This section is checked during stage creation to ensure
-	 * that there are no global variables present
-	 */
-	.illegal_globals . : {
-		*(.data)
-		*(.data.*)
-		*(.bss)
-		*(.bss.*)
-		*(.sbss)
-		*(.sbss.*)
-	}
-
    /DISCARD/ : {
    	*(.comment)
    	*(.note)
@@ -78,5 +65,20 @@ SECTIONS
    	preram_cbmem_console = .;
    }

+	/* Global variables are not allowed in romstage
+	 * This section is checked during stage creation to ensure
+	 * that there are no global variables present
+	 */
+
+	. = 0xffffff00;
+	.illegal_globals . : {
+		*(EXCLUDE_FILE (*/libagesa.*.a: */buildOpts.romstage.o */agesawrapper.romstage.o) .data)
+		*(.data.*)
+		*(.bss)
+		*(.bss.*)
+		*(.sbss)
+		*(.sbss.*)
+	}
+
    _bogus = ASSERT((SIZEOF(.car.data) + CONFIG_CONSOLE_PRERAM_BUFFER_SIZE <= CONFIG_DCACHE_RAM_SIZE), "Cache as RAM area is too full");
 }