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authorFelix Fietkau <nbd@openwrt.org>2012-02-12 18:40:18 +0000
committerFelix Fietkau <nbd@openwrt.org>2012-02-12 18:40:18 +0000
commit7a010ef4d19eb6cc3890ffa87235f9085f82b198 (patch)
tree86388c4eb7167961e342866340eeee7116773391
parent38dde1e79bbdcf816e6f22462101cb6ae0e413ad (diff)
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package/grub: fix stage2 link with recent binutils
We want the `_start's symbols to be at the very beginning of the `stage2' binary's `.text' section. However, nothing enforces this requirement. With recent binutils (ie. post 2.19.1), this results in a corrupt binary, as ld(1) puts another symbol (eg. `journal_init') at the beginning of the section. Fix this by providing a stripped down version of the default linker script where we enforces the position of `_start' in the `.text' section. Patch by Arnaud Lacombe (#10444) git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30484 3c298f89-4303-0410-b956-a3cf2f4a3e73
-rw-r--r--package/grub/patches/030-add-stage2-ldscripts.patch77
1 files changed, 77 insertions, 0 deletions
diff --git a/package/grub/patches/030-add-stage2-ldscripts.patch b/package/grub/patches/030-add-stage2-ldscripts.patch
new file mode 100644
index 0000000000..aff7ed466f
--- /dev/null
+++ b/package/grub/patches/030-add-stage2-ldscripts.patch
@@ -0,0 +1,77 @@
+From 8858927ddc6797489cad322fc2d2134aeae543cd Mon Sep 17 00:00:00 2001
+From: Arnaud Lacombe <lacombar@gmail.com>
+Date: Sun, 11 Dec 2011 16:44:02 -0500
+Subject: [PATCH] add-stage2-ldscripts
+
+---
+ stage2/Makefile.am | 2 +-
+ stage2/Makefile.in | 2 +-
+ stage2/stage2.ldscripts | 30 ++++++++++++++++++++++++++++++
+ 3 files changed, 32 insertions(+), 2 deletions(-)
+ create mode 100644 stage2/stage2.ldscripts
+
+diff --git a/stage2/Makefile.am b/stage2/Makefile.am
+index f8e6d42..ea28a4d 100644
+--- a/stage2/Makefile.am
++++ b/stage2/Makefile.am
+@@ -55,7 +55,7 @@ noinst_PROGRAMS = pre_stage2.exec start.exec start_eltorito.exec \
+ endif
+ MOSTLYCLEANFILES = $(noinst_PROGRAMS)
+
+-PRE_STAGE2_LINK = -nostdlib -Wl,-N -Wl,-Ttext -Wl,8200
++PRE_STAGE2_LINK = -nostdlib -Wl,-N -Wl,-Tstage2.ldscripts
+ START_LINK = -nostdlib -Wl,-N -Wl,-Ttext -Wl,8000
+ NBLOADER_LINK = -nostdlib -Wl,-N -Wl,-Ttext -Wl,0
+ PXELOADER_LINK = -nostdlib -Wl,-N -Wl,-Ttext -Wl,7C00
+diff --git a/stage2/Makefile.in b/stage2/Makefile.in
+index d0062bd..7bee2d5 100644
+--- a/stage2/Makefile.in
++++ b/stage2/Makefile.in
+@@ -468,7 +468,7 @@ libgrub_a_CFLAGS = $(GRUB_CFLAGS) -I$(top_srcdir)/lib \
+ @DISKLESS_SUPPORT_FALSE@noinst_DATA = pre_stage2 start start_eltorito
+ @DISKLESS_SUPPORT_TRUE@noinst_DATA = pre_stage2 start start_eltorito nbloader pxeloader diskless
+ MOSTLYCLEANFILES = $(noinst_PROGRAMS)
+-PRE_STAGE2_LINK = -nostdlib -Wl,-N -Wl,-Ttext -Wl,8200
++PRE_STAGE2_LINK = -nostdlib -Wl,-N -Wl,-Tstage2.ldscripts
+ START_LINK = -nostdlib -Wl,-N -Wl,-Ttext -Wl,8000
+ NBLOADER_LINK = -nostdlib -Wl,-N -Wl,-Ttext -Wl,0
+ PXELOADER_LINK = -nostdlib -Wl,-N -Wl,-Ttext -Wl,7C00
+diff --git a/stage2/stage2.ldscripts b/stage2/stage2.ldscripts
+new file mode 100644
+index 0000000..2c8b8e1
+--- /dev/null
++++ b/stage2/stage2.ldscripts
+@@ -0,0 +1,30 @@
++/* Script for -N: mix text and data on same page; don't align data */
++OUTPUT_FORMAT("elf32-i386", "elf32-i386",
++ "elf32-i386")
++OUTPUT_ARCH(i386)
++ENTRY(_start)
++SECTIONS
++{
++ . = 0x8200;
++ .text :
++ {
++ _start = .;
++ *(.text .text.* )
++ }
++ .rodata : { *(.rodata .rodata.* ) }
++ /* Adjust the address for the data segment. We want to adjust up to
++ the same address within the page on the next page up. */
++ . = .;
++ .data : { *(.data .data.* ) }
++ __bss_start = .;
++ .bss :
++ {
++ *(.bss .bss.* )
++ *(COMMON)
++ . = ALIGN(. != 0 ? 32 / 8 : 1);
++ }
++ . = ALIGN(32 / 8);
++ . = ALIGN(32 / 8);
++ _end = .; PROVIDE (end = .);
++ .comment 0 : { *(.comment) }
++}
+--
+1.7.6.153.g78432
+