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769 lines
20 KiB
769 lines
20 KiB
6 years ago
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From 08278452325454027c6d42bc2d687dc8dd518006 Mon Sep 17 00:00:00 2001
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From: "H. Peter Anvin" <hpa@linux.intel.com>
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Date: Tue, 29 May 2012 14:08:11 -0700
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Subject: [PATCH] relocs: Move stop to the end
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The Linux kernel puts the stop word at the beginning of the relocation
|
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list (the list is processed backwards); Syslinux puts the stop word at
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the beginning of the relocation list (the list is processed forwards.)
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Missed that change when syncing with the kernel version.
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(plus everything to actually make this get built... -- pjones)
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Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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---
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diff --git a/com32/Makefile b/com32/Makefile
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index da632a1..b59fd3f 100644
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--- a/com32/Makefile
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+++ b/com32/Makefile
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@@ -1,5 +1,5 @@
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SUBDIRS = libupload tools lib gpllib libutil modules mboot menu samples rosh cmenu \
|
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- hdt gfxboot sysdump lua/src
|
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+ hdt gfxboot sysdump lua/src chain
|
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all tidy dist clean spotless install:
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set -e; for d in $(SUBDIRS); do $(MAKE) -C $$d $@; done
|
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diff --git a/com32/chain/Makefile b/com32/chain/Makefile
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|
new file mode 100644
|
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|
index 0000000..9d398a8
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--- /dev/null
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+++ b/com32/chain/Makefile
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@@ -0,0 +1,39 @@
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+## -----------------------------------------------------------------------
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+##
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+## Copyright 2001-2010 H. Peter Anvin - All Rights Reserved
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+## Copyright 2010 Michal Soltys
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+##
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+## This program is free software; you can redistribute it and/or modify
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+## it under the terms of the GNU General Public License as published by
|
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+## the Free Software Foundation, Inc., 53 Temple Place Ste 330,
|
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+## Boston MA 02111-1307, USA; either version 2 of the License, or
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+## (at your option) any later version; incorporated herein by reference.
|
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+##
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+## -----------------------------------------------------------------------
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+
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|
+
|
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+topdir = ../..
|
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|
+MAKEDIR = $(topdir)/mk
|
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|
+include $(MAKEDIR)/com32.mk
|
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|
+
|
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|
+OBJS = chain.o partiter.o utility.o options.o mangle.o
|
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|
+
|
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|
+all:
|
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|
+
|
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|
+%.o: %.c
|
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|
+ $(CC) $(MAKEDEPS) $(CFLAGS) $(CHAINEXTOPT) -c -o $@ $<
|
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|
+
|
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|
+tidy dist:
|
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|
+ rm -f *.o *.lo *.a *.lst .*.d *.tmp
|
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|
+
|
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|
+clean: tidy
|
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|
+ rm -f *.lnx
|
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|
+
|
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+spotless: clean
|
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|
+ rm -f *.lss *.c32 *.com
|
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|
+ rm -f *~ \#*
|
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|
+
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+install:
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+
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|
+
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+-include .*.d
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diff --git a/com32/hdt/Makefile b/com32/hdt/Makefile
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|
index f187346..ea9ddfe 100644
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|
--- a/com32/hdt/Makefile
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|
+++ b/com32/hdt/Makefile
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|
@@ -45,7 +45,7 @@ FLOPPY_DIR ?= floppy
|
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|
PCI_IDS_FILE ?= $(PWD)/$(FLOPPY_DIR)/pci.ids
|
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|
GZ_PCI_IDS_FILE ?= $(PCI_IDS_FILE).gz
|
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|
MENU_COM32 ?= $(com32)/menu/menu.c32
|
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|
-CHAIN_COM32 ?= $(com32)/modules/chain.c32
|
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|
+CHAIN_COM32 ?= $(com32)/modules/chain.c32
|
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ART_DIR ?= art/
|
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|
QEMU ?= qemu-kvm
|
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|
|
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@@ -110,10 +110,16 @@ hdt.iso: hdt.c32 $(topdir)/core/isolinux.bin $(FLOPPY_DIR)/hdt.cfg memtest
|
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mv hdt.iso hdt-$(VERSION).iso
|
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|
ln -sf hdt-$(VERSION).iso hdt.iso
|
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|
|
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|
-release: spotless hdt.c32 hdt.img hdt.img.gz hdt.iso
|
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|
+hdt-hybrid.iso: hdt.iso ../../utils/isohybrid
|
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|
+ cp hdt-$(VERSION).iso hdt-hybrid-$(VERSION).iso
|
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|
+ ../../utils/isohybrid --partok hdt-hybrid-$(VERSION).iso
|
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|
+ ln -sf hdt-hybrid-$(VERSION).iso hdt-hybrid.iso
|
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|
+
|
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|
+release: spotless hdt.c32 hdt.img hdt.img.gz hdt.iso hdt-hybrid.iso
|
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|
mv hdt.c32 hdt_$(NODASH_VERSION).c32
|
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|
md5sum hdt_$(NODASH_VERSION).c32 >$(SUM_FILE)
|
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|
md5sum hdt-$(VERSION).iso >>$(SUM_FILE)
|
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|
+ md5sum hdt-hybrid-$(VERSION).iso >>$(SUM_FILE)
|
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|
md5sum hdt-$(VERSION).img >>$(SUM_FILE)
|
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|
md5sum hdt-$(VERSION).img.gz >>$(SUM_FILE)
|
||
|
|
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|
diff --git a/com32/lib/com32.ld b/com32/lib/com32.ld
|
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|
index 37ee46c..008e4ce 100644
|
||
|
--- a/com32/lib/com32.ld
|
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|
+++ b/com32/lib/com32.ld
|
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|
@@ -36,36 +36,23 @@ SECTIONS
|
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|
.rodata1 : { *(.rodata1) }
|
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|
__rodata_end = .;
|
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|
|
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|
- /* Ensure the __preinit_array_start label is properly aligned. We
|
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|
- could instead move the label definition inside the section, but
|
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|
- the linker would then create the section even if it turns out to
|
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|
- be empty, which isn't pretty. */
|
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|
+ /*
|
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|
+ * The difference betwee .ctors/.dtors and .init_array/.fini_array
|
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|
+ * is the ordering, but we don't use prioritization for libcom32, so
|
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|
+ * just lump them all together and hope that's okay.
|
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|
+ */
|
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|
. = ALIGN(4);
|
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|
- .preinit_array : {
|
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|
- PROVIDE (__preinit_array_start = .);
|
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|
- *(.preinit_array)
|
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|
- PROVIDE (__preinit_array_end = .);
|
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|
- }
|
||
|
- .init_array : {
|
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|
- PROVIDE (__init_array_start = .);
|
||
|
- *(.init_array)
|
||
|
- PROVIDE (__init_array_end = .);
|
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|
- }
|
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|
- .fini_array : {
|
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|
- PROVIDE (__fini_array_start = .);
|
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|
- *(.fini_array)
|
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|
- PROVIDE (__fini_array_end = .);
|
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|
- }
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|
.ctors : {
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|
PROVIDE (__ctors_start = .);
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|
- KEEP (*(SORT(.ctors.*)))
|
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|
- KEEP (*(.ctors))
|
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|
+ KEEP (*(SORT(.preinit_array*)))
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|
+ KEEP (*(SORT(.init_array*)))
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|
+ KEEP (*(SORT(.ctors*)))
|
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|
PROVIDE (__ctors_end = .);
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|
}
|
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|
.dtors : {
|
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|
PROVIDE (__dtors_start = .);
|
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|
- KEEP (*(SORT(.dtors.*)))
|
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|
- KEEP (*(.dtors))
|
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|
+ KEEP (*(SORT(.fini_array*)))
|
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|
+ KEEP (*(SORT(.dtors*)))
|
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|
PROVIDE (__dtors_end = .);
|
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|
}
|
||
|
|
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|
diff --git a/com32/modules/Makefile b/com32/modules/Makefile
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|
index e9ce1d1..d8861c4 100644
|
||
|
--- a/com32/modules/Makefile
|
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|
+++ b/com32/modules/Makefile
|
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|
@@ -19,11 +19,12 @@ topdir = ../..
|
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|
MAKEDIR = $(topdir)/mk
|
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|
include $(MAKEDIR)/com32.mk
|
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|
|
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-MODULES = chain.c32 config.c32 ethersel.c32 dmitest.c32 cpuidtest.c32 \
|
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|
+MODULES = chain.c32 config.c32 ethersel.c32 dmitest.c32 cpuidtest.c32 \
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disk.c32 pcitest.c32 elf.c32 linux.c32 reboot.c32 pmload.c32 \
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|
meminfo.c32 sdi.c32 sanboot.c32 ifcpu64.c32 vesainfo.c32 \
|
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kbdmap.c32 cmd.c32 vpdtest.c32 host.c32 ls.c32 gpxecmd.c32 \
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- ifcpu.c32 cpuid.c32 cat.c32 pwd.c32 ifplop.c32 zzjson.c32 whichsys.c32
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+ ifcpu.c32 cpuid.c32 cat.c32 pwd.c32 ifplop.c32 zzjson.c32 \
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|
+ whichsys.c32
|
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|
|
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|
TESTFILES =
|
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|
|
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|
diff --git a/com32/tools/Makefile b/com32/tools/Makefile
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|
index 7badabd..0161baf 100644
|
||
|
--- a/com32/tools/Makefile
|
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|
+++ b/com32/tools/Makefile
|
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|
@@ -15,6 +15,8 @@ include $(MAKEDIR)/build.mk
|
||
|
|
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|
BINS = relocs
|
||
|
|
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|
+INCLUDES += -I./include
|
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|
+
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|
all : $(BINS)
|
||
|
|
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|
relocs : relocs.o
|
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|
diff --git a/com32/tools/include/tools/le_byteshift.h b/com32/tools/include/tools/le_byteshift.h
|
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|
new file mode 100644
|
||
|
index 0000000..c99d45a
|
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|
--- /dev/null
|
||
|
+++ b/com32/tools/include/tools/le_byteshift.h
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|
@@ -0,0 +1,70 @@
|
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|
+#ifndef _TOOLS_LE_BYTESHIFT_H
|
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|
+#define _TOOLS_LE_BYTESHIFT_H
|
||
|
+
|
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|
+#include <linux/types.h>
|
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|
+
|
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|
+static inline __u16 __get_unaligned_le16(const __u8 *p)
|
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|
+{
|
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|
+ return p[0] | p[1] << 8;
|
||
|
+}
|
||
|
+
|
||
|
+static inline __u32 __get_unaligned_le32(const __u8 *p)
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|
+{
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|
+ return p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
|
||
|
+}
|
||
|
+
|
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|
+static inline __u64 __get_unaligned_le64(const __u8 *p)
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|
+{
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|
+ return (__u64)__get_unaligned_le32(p + 4) << 32 |
|
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|
+ __get_unaligned_le32(p);
|
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|
+}
|
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|
+
|
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|
+static inline void __put_unaligned_le16(__u16 val, __u8 *p)
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+{
|
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|
+ *p++ = val;
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+ *p++ = val >> 8;
|
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|
+}
|
||
|
+
|
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|
+static inline void __put_unaligned_le32(__u32 val, __u8 *p)
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+{
|
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|
+ __put_unaligned_le16(val >> 16, p + 2);
|
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|
+ __put_unaligned_le16(val, p);
|
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|
+}
|
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|
+
|
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|
+static inline void __put_unaligned_le64(__u64 val, __u8 *p)
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|
+{
|
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|
+ __put_unaligned_le32(val >> 32, p + 4);
|
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|
+ __put_unaligned_le32(val, p);
|
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|
+}
|
||
|
+
|
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|
+static inline __u16 get_unaligned_le16(const void *p)
|
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|
+{
|
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|
+ return __get_unaligned_le16((const __u8 *)p);
|
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|
+}
|
||
|
+
|
||
|
+static inline __u32 get_unaligned_le32(const void *p)
|
||
|
+{
|
||
|
+ return __get_unaligned_le32((const __u8 *)p);
|
||
|
+}
|
||
|
+
|
||
|
+static inline __u64 get_unaligned_le64(const void *p)
|
||
|
+{
|
||
|
+ return __get_unaligned_le64((const __u8 *)p);
|
||
|
+}
|
||
|
+
|
||
|
+static inline void put_unaligned_le16(__u16 val, void *p)
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||
|
+{
|
||
|
+ __put_unaligned_le16(val, p);
|
||
|
+}
|
||
|
+
|
||
|
+static inline void put_unaligned_le32(__u32 val, void *p)
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||
|
+{
|
||
|
+ __put_unaligned_le32(val, p);
|
||
|
+}
|
||
|
+
|
||
|
+static inline void put_unaligned_le64(__u64 val, void *p)
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||
|
+{
|
||
|
+ __put_unaligned_le64(val, p);
|
||
|
+}
|
||
|
+
|
||
|
+#endif /* _TOOLS_LE_BYTESHIFT_H */
|
||
|
diff --git a/com32/tools/relocs.c b/com32/tools/relocs.c
|
||
|
index 2474206..86fc7c5 100644
|
||
|
--- a/com32/tools/relocs.c
|
||
|
+++ b/com32/tools/relocs.c
|
||
|
@@ -13,12 +13,16 @@
|
||
|
#define USE_BSD
|
||
|
#include <endian.h>
|
||
|
#include <regex.h>
|
||
|
-#include <sys/types.h>
|
||
|
+#include <tools/le_byteshift.h>
|
||
|
+
|
||
|
+static void die(char *fmt, ...);
|
||
|
|
||
|
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
|
||
|
static Elf32_Ehdr ehdr;
|
||
|
static unsigned long reloc_count, reloc_idx;
|
||
|
static unsigned long *relocs;
|
||
|
+static unsigned long reloc16_count, reloc16_idx;
|
||
|
+static unsigned long *relocs16;
|
||
|
|
||
|
struct section {
|
||
|
Elf32_Shdr shdr;
|
||
|
@@ -29,60 +33,87 @@ struct section {
|
||
|
};
|
||
|
static struct section *secs;
|
||
|
|
||
|
-static void die(char *fmt, ...)
|
||
|
-{
|
||
|
- va_list ap;
|
||
|
- va_start(ap, fmt);
|
||
|
- vfprintf(stderr, fmt, ap);
|
||
|
- va_end(ap);
|
||
|
- exit(1);
|
||
|
-}
|
||
|
+enum symtype {
|
||
|
+ S_ABS,
|
||
|
+ S_REL,
|
||
|
+ S_SEG,
|
||
|
+ S_LIN,
|
||
|
+ S_NSYMTYPES
|
||
|
+};
|
||
|
|
||
|
+static const char * const sym_regex_kernel[S_NSYMTYPES] = {
|
||
|
/*
|
||
|
* Following symbols have been audited. Don't warn user about
|
||
|
* absolute relocations present w.r.t these symbols.
|
||
|
*/
|
||
|
+ [S_ABS] =
|
||
|
+ "^(__.*_len|__.*_dwords)$",
|
||
|
|
||
|
-/* True absolute relocations */
|
||
|
+/*
|
||
|
+ * These symbols are known to be relative, even if the linker marks them
|
||
|
+ * as absolute (typically defined outside any section in the linker script.)
|
||
|
+ */
|
||
|
+ [S_REL] =
|
||
|
+ "^(__.*_start|__.*_end|_end|_[se](text|data))$",
|
||
|
+};
|
||
|
|
||
|
-static const char safe_abs_regex[] =
|
||
|
-"^(__.*_len|__.*_dwords)$";
|
||
|
-static regex_t safe_abs_regex_c;
|
||
|
|
||
|
-static int is_safe_abs_reloc(const char *sym_name)
|
||
|
-{
|
||
|
- return !regexec(&safe_abs_regex_c, sym_name, 0, NULL, 0);
|
||
|
-}
|
||
|
+static const char * const sym_regex_realmode[S_NSYMTYPES] = {
|
||
|
+/*
|
||
|
+ * These are 16-bit segment symbols when compiling 16-bit code.
|
||
|
+ */
|
||
|
+ [S_SEG] =
|
||
|
+ "^real_mode_seg$",
|
||
|
|
||
|
-/* These are relative even though the linker marks them absolute */
|
||
|
+/*
|
||
|
+ * These are offsets belonging to segments, as opposed to linear addresses,
|
||
|
+ * when compiling 16-bit code.
|
||
|
+ */
|
||
|
+ [S_LIN] =
|
||
|
+ "^pa_",
|
||
|
+};
|
||
|
|
||
|
-static const char safe_rel_regex[] =
|
||
|
-"^(__.*_start|__.*_end|_end|_[se](text|data))$";
|
||
|
-static regex_t safe_rel_regex_c;
|
||
|
+static const char * const *sym_regex;
|
||
|
|
||
|
-static int is_safe_rel_reloc(const char *sym_name)
|
||
|
+static regex_t sym_regex_c[S_NSYMTYPES];
|
||
|
+static int is_reloc(enum symtype type, const char *sym_name)
|
||
|
{
|
||
|
- return !regexec(&safe_rel_regex_c, sym_name, 0, NULL, 0);
|
||
|
+ return sym_regex[type] &&
|
||
|
+ !regexec(&sym_regex_c[type], sym_name, 0, NULL, 0);
|
||
|
}
|
||
|
|
||
|
-static void regex_init(void)
|
||
|
+static void regex_init(int use_real_mode)
|
||
|
{
|
||
|
- char errbuf[128];
|
||
|
- int err;
|
||
|
+ char errbuf[128];
|
||
|
+ int err;
|
||
|
+ int i;
|
||
|
|
||
|
- err = regcomp(&safe_abs_regex_c, safe_abs_regex,
|
||
|
- REG_EXTENDED|REG_NOSUB);
|
||
|
- if (err) {
|
||
|
- regerror(err, &safe_abs_regex_c, errbuf, sizeof errbuf);
|
||
|
- die("%s", errbuf);
|
||
|
- }
|
||
|
+ if (use_real_mode)
|
||
|
+ sym_regex = sym_regex_realmode;
|
||
|
+ else
|
||
|
+ sym_regex = sym_regex_kernel;
|
||
|
|
||
|
- err = regcomp(&safe_rel_regex_c, safe_rel_regex,
|
||
|
- REG_EXTENDED|REG_NOSUB);
|
||
|
- if (err) {
|
||
|
- regerror(err, &safe_rel_regex_c, errbuf, sizeof errbuf);
|
||
|
- die("%s", errbuf);
|
||
|
- }
|
||
|
+ for (i = 0; i < S_NSYMTYPES; i++) {
|
||
|
+ if (!sym_regex[i])
|
||
|
+ continue;
|
||
|
+
|
||
|
+ err = regcomp(&sym_regex_c[i], sym_regex[i],
|
||
|
+ REG_EXTENDED|REG_NOSUB);
|
||
|
+
|
||
|
+ if (err) {
|
||
|
+ regerror(err, &sym_regex_c[i], errbuf, sizeof errbuf);
|
||
|
+ die("%s", errbuf);
|
||
|
+ }
|
||
|
+ }
|
||
|
+}
|
||
|
+
|
||
|
+static void die(char *fmt, ...)
|
||
|
+{
|
||
|
+ va_list ap;
|
||
|
+ va_start(ap, fmt);
|
||
|
+ vfprintf(stderr, fmt, ap);
|
||
|
+ va_end(ap);
|
||
|
+ exit(1);
|
||
|
}
|
||
|
|
||
|
static const char *sym_type(unsigned type)
|
||
|
@@ -153,13 +184,16 @@ static const char *rel_type(unsigned type)
|
||
|
REL_TYPE(R_386_RELATIVE),
|
||
|
REL_TYPE(R_386_GOTOFF),
|
||
|
REL_TYPE(R_386_GOTPC),
|
||
|
+ REL_TYPE(R_386_8),
|
||
|
+ REL_TYPE(R_386_PC8),
|
||
|
+ REL_TYPE(R_386_16),
|
||
|
+ REL_TYPE(R_386_PC16),
|
||
|
#undef REL_TYPE
|
||
|
};
|
||
|
- const char *name = NULL;
|
||
|
- if (type < ARRAY_SIZE(type_name))
|
||
|
+ const char *name = "unknown type rel type name";
|
||
|
+ if (type < ARRAY_SIZE(type_name) && type_name[type]) {
|
||
|
name = type_name[type];
|
||
|
- if (!name)
|
||
|
- name = "unknown";
|
||
|
+ }
|
||
|
return name;
|
||
|
}
|
||
|
|
||
|
@@ -189,7 +223,7 @@ static const char *sym_name(const char *sym_strtab, Elf32_Sym *sym)
|
||
|
name = sym_strtab + sym->st_name;
|
||
|
}
|
||
|
else {
|
||
|
- name = sec_name(secs[sym->st_shndx].shdr.sh_name);
|
||
|
+ name = sec_name(sym->st_shndx);
|
||
|
}
|
||
|
return name;
|
||
|
}
|
||
|
@@ -428,7 +462,7 @@ static void print_absolute_symbols(void)
|
||
|
printf("\n");
|
||
|
}
|
||
|
|
||
|
-static int print_absolute_relocs(FILE *f)
|
||
|
+static void print_absolute_relocs(void)
|
||
|
{
|
||
|
int i, printed = 0;
|
||
|
|
||
|
@@ -472,17 +506,18 @@ static int print_absolute_relocs(FILE *f)
|
||
|
* Before warning check if this absolute symbol
|
||
|
* relocation is harmless.
|
||
|
*/
|
||
|
- if (is_safe_abs_reloc(name) ||
|
||
|
- is_safe_rel_reloc(name))
|
||
|
+ if (is_reloc(S_ABS, name) || is_reloc(S_REL, name))
|
||
|
continue;
|
||
|
|
||
|
if (!printed) {
|
||
|
- fprintf(f, "Unknown absolute relocations present\n");
|
||
|
- fprintf(f, "Offset Info Type Sym.Value Sym.Name\n");
|
||
|
+ printf("WARNING: Absolute relocations"
|
||
|
+ " present\n");
|
||
|
+ printf("Offset Info Type Sym.Value "
|
||
|
+ "Sym.Name\n");
|
||
|
printed = 1;
|
||
|
}
|
||
|
|
||
|
- fprintf(f, "%08x %08x %10s %08x %s\n",
|
||
|
+ printf("%08x %08x %10s %08x %s\n",
|
||
|
rel->r_offset,
|
||
|
rel->r_info,
|
||
|
rel_type(ELF32_R_TYPE(rel->r_info)),
|
||
|
@@ -492,12 +527,11 @@ static int print_absolute_relocs(FILE *f)
|
||
|
}
|
||
|
|
||
|
if (printed)
|
||
|
- fputc('\n', f);
|
||
|
-
|
||
|
- return printed;
|
||
|
+ printf("\n");
|
||
|
}
|
||
|
|
||
|
-static void walk_relocs(void (*visit)(Elf32_Rel *rel, Elf32_Sym *sym))
|
||
|
+static void walk_relocs(void (*visit)(Elf32_Rel *rel, Elf32_Sym *sym),
|
||
|
+ int use_real_mode)
|
||
|
{
|
||
|
int i;
|
||
|
/* Walk through the relocations */
|
||
|
@@ -522,31 +556,71 @@ static void walk_relocs(void (*visit)(Elf32_Rel *rel, Elf32_Sym *sym))
|
||
|
Elf32_Rel *rel;
|
||
|
Elf32_Sym *sym;
|
||
|
unsigned r_type;
|
||
|
+ const char *symname;
|
||
|
+ int shn_abs;
|
||
|
+
|
||
|
rel = &sec->reltab[j];
|
||
|
sym = &sh_symtab[ELF32_R_SYM(rel->r_info)];
|
||
|
r_type = ELF32_R_TYPE(rel->r_info);
|
||
|
- /* Don't visit relocations to absolute symbols */
|
||
|
- if (sym->st_shndx == SHN_ABS &&
|
||
|
- !is_safe_rel_reloc(sym_name(sym_strtab, sym)))
|
||
|
- continue;
|
||
|
+
|
||
|
+ shn_abs = sym->st_shndx == SHN_ABS;
|
||
|
|
||
|
switch (r_type) {
|
||
|
case R_386_NONE:
|
||
|
case R_386_PC32:
|
||
|
+ case R_386_PC16:
|
||
|
+ case R_386_PC8:
|
||
|
case R_386_GOTPC:
|
||
|
case R_386_GOTOFF:
|
||
|
case R_386_GOT32:
|
||
|
case R_386_PLT32:
|
||
|
- /* Relative relocations don't need to
|
||
|
- be adjusted */
|
||
|
+ /*
|
||
|
+ * NONE can be ignored and and PC relative
|
||
|
+ * relocations don't need to be adjusted.
|
||
|
+ */
|
||
|
break;
|
||
|
+
|
||
|
+ case R_386_16:
|
||
|
+ symname = sym_name(sym_strtab, sym);
|
||
|
+ if (!use_real_mode)
|
||
|
+ goto bad;
|
||
|
+ if (shn_abs) {
|
||
|
+ if (is_reloc(S_ABS, symname))
|
||
|
+ break;
|
||
|
+ else if (!is_reloc(S_SEG, symname))
|
||
|
+ goto bad;
|
||
|
+ } else {
|
||
|
+ if (is_reloc(S_LIN, symname))
|
||
|
+ goto bad;
|
||
|
+ else
|
||
|
+ break;
|
||
|
+ }
|
||
|
+ visit(rel, sym);
|
||
|
+ break;
|
||
|
+
|
||
|
case R_386_32:
|
||
|
- /* Visit relocations that need adjustment */
|
||
|
+ symname = sym_name(sym_strtab, sym);
|
||
|
+ if (shn_abs) {
|
||
|
+ if (is_reloc(S_ABS, symname))
|
||
|
+ break;
|
||
|
+ else if (!is_reloc(S_REL, symname))
|
||
|
+ goto bad;
|
||
|
+ } else {
|
||
|
+ if (use_real_mode &&
|
||
|
+ !is_reloc(S_LIN, symname))
|
||
|
+ break;
|
||
|
+ }
|
||
|
visit(rel, sym);
|
||
|
break;
|
||
|
default:
|
||
|
die("Unsupported relocation type: %s (%d)\n",
|
||
|
rel_type(r_type), r_type);
|
||
|
+ break;
|
||
|
+ bad:
|
||
|
+ symname = sym_name(sym_strtab, sym);
|
||
|
+ die("Invalid %s %s relocation: %s\n",
|
||
|
+ shn_abs ? "absolute" : "relative",
|
||
|
+ rel_type(r_type), symname);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
@@ -554,8 +628,12 @@ static void walk_relocs(void (*visit)(Elf32_Rel *rel, Elf32_Sym *sym))
|
||
|
|
||
|
static void count_reloc(Elf32_Rel *rel, Elf32_Sym *sym)
|
||
|
{
|
||
|
- (void)rel; (void)sym;
|
||
|
- reloc_count += 1;
|
||
|
+ (void)sym;
|
||
|
+
|
||
|
+ if (ELF32_R_TYPE(rel->r_info) == R_386_16)
|
||
|
+ reloc16_count++;
|
||
|
+ else
|
||
|
+ reloc_count++;
|
||
|
}
|
||
|
|
||
|
static void collect_reloc(Elf32_Rel *rel, Elf32_Sym *sym)
|
||
|
@@ -563,7 +641,10 @@ static void collect_reloc(Elf32_Rel *rel, Elf32_Sym *sym)
|
||
|
(void)sym;
|
||
|
|
||
|
/* Remember the address that needs to be adjusted. */
|
||
|
- relocs[reloc_idx++] = rel->r_offset;
|
||
|
+ if (ELF32_R_TYPE(rel->r_info) == R_386_16)
|
||
|
+ relocs16[reloc16_idx++] = rel->r_offset;
|
||
|
+ else
|
||
|
+ relocs[reloc_idx++] = rel->r_offset;
|
||
|
}
|
||
|
|
||
|
static int cmp_relocs(const void *va, const void *vb)
|
||
|
@@ -573,23 +654,41 @@ static int cmp_relocs(const void *va, const void *vb)
|
||
|
return (*a == *b)? 0 : (*a > *b)? 1 : -1;
|
||
|
}
|
||
|
|
||
|
-static void emit_relocs(int as_text)
|
||
|
+static int write32(unsigned int v, FILE *f)
|
||
|
+{
|
||
|
+ unsigned char buf[4];
|
||
|
+
|
||
|
+ put_unaligned_le32(v, buf);
|
||
|
+ return fwrite(buf, 1, 4, f) == 4 ? 0 : -1;
|
||
|
+}
|
||
|
+
|
||
|
+static void emit_relocs(int as_text, int use_real_mode)
|
||
|
{
|
||
|
int i;
|
||
|
/* Count how many relocations I have and allocate space for them. */
|
||
|
reloc_count = 0;
|
||
|
- walk_relocs(count_reloc);
|
||
|
+ walk_relocs(count_reloc, use_real_mode);
|
||
|
relocs = malloc(reloc_count * sizeof(relocs[0]));
|
||
|
if (!relocs) {
|
||
|
die("malloc of %d entries for relocs failed\n",
|
||
|
reloc_count);
|
||
|
}
|
||
|
+
|
||
|
+ relocs16 = malloc(reloc16_count * sizeof(relocs[0]));
|
||
|
+ if (!relocs16) {
|
||
|
+ die("malloc of %d entries for relocs16 failed\n",
|
||
|
+ reloc16_count);
|
||
|
+ }
|
||
|
/* Collect up the relocations */
|
||
|
reloc_idx = 0;
|
||
|
- walk_relocs(collect_reloc);
|
||
|
+ walk_relocs(collect_reloc, use_real_mode);
|
||
|
+
|
||
|
+ if (reloc16_count && !use_real_mode)
|
||
|
+ die("Segment relocations found but --realmode not specified\n");
|
||
|
|
||
|
/* Order the relocations for more efficient processing */
|
||
|
qsort(relocs, reloc_count, sizeof(relocs[0]), cmp_relocs);
|
||
|
+ qsort(relocs16, reloc16_count, sizeof(relocs16[0]), cmp_relocs);
|
||
|
|
||
|
/* Print the relocations */
|
||
|
if (as_text) {
|
||
|
@@ -598,61 +697,83 @@ static void emit_relocs(int as_text)
|
||
|
*/
|
||
|
printf(".section \".data.reloc\",\"a\"\n");
|
||
|
printf(".balign 4\n");
|
||
|
- for (i = 0; i < reloc_count; i++) {
|
||
|
- printf("\t .long 0x%08lx\n", relocs[i]);
|
||
|
+ if (use_real_mode) {
|
||
|
+ printf("\t.long %lu\n", reloc16_count);
|
||
|
+ for (i = 0; i < reloc16_count; i++)
|
||
|
+ printf("\t.long 0x%08lx\n", relocs16[i]);
|
||
|
+ printf("\t.long %lu\n", reloc_count);
|
||
|
+ for (i = 0; i < reloc_count; i++) {
|
||
|
+ printf("\t.long 0x%08lx\n", relocs[i]);
|
||
|
+ }
|
||
|
+ } else {
|
||
|
+ for (i = 0; i < reloc_count; i++) {
|
||
|
+ printf("\t.long 0x%08lx\n", relocs[i]);
|
||
|
+ }
|
||
|
+ /* Print a stop */
|
||
|
+ printf("\t.long 0x%08lx\n", (unsigned long)0);
|
||
|
}
|
||
|
+
|
||
|
printf("\n");
|
||
|
}
|
||
|
else {
|
||
|
- unsigned char buf[4];
|
||
|
- /* Now print each relocation */
|
||
|
- for (i = 0; i < reloc_count; i++) {
|
||
|
- buf[0] = (relocs[i] >> 0) & 0xff;
|
||
|
- buf[1] = (relocs[i] >> 8) & 0xff;
|
||
|
- buf[2] = (relocs[i] >> 16) & 0xff;
|
||
|
- buf[3] = (relocs[i] >> 24) & 0xff;
|
||
|
- fwrite(buf, 4, 1, stdout);
|
||
|
+ if (use_real_mode) {
|
||
|
+ write32(reloc16_count, stdout);
|
||
|
+ for (i = 0; i < reloc16_count; i++)
|
||
|
+ write32(relocs16[i], stdout);
|
||
|
+ write32(reloc_count, stdout);
|
||
|
+
|
||
|
+ /* Now print each relocation */
|
||
|
+ for (i = 0; i < reloc_count; i++)
|
||
|
+ write32(relocs[i], stdout);
|
||
|
+ } else {
|
||
|
+ /* Now print each relocation */
|
||
|
+ for (i = 0; i < reloc_count; i++) {
|
||
|
+ write32(relocs[i], stdout);
|
||
|
+ }
|
||
|
+
|
||
|
+ /* Print a stop */
|
||
|
+ write32(0, stdout);
|
||
|
}
|
||
|
- /* Print a stop */
|
||
|
- memset(buf, 0, sizeof buf);
|
||
|
- fwrite(buf, 4, 1, stdout);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void usage(void)
|
||
|
{
|
||
|
- die("relocs [--abs-syms |--abs-relocs | --text] vmlinux\n");
|
||
|
+ die("relocs [--abs-syms|--abs-relocs|--text|--realmode] vmlinux\n");
|
||
|
}
|
||
|
|
||
|
int main(int argc, char **argv)
|
||
|
{
|
||
|
int show_absolute_syms, show_absolute_relocs;
|
||
|
- int as_text;
|
||
|
+ int as_text, use_real_mode;
|
||
|
const char *fname;
|
||
|
FILE *fp;
|
||
|
int i;
|
||
|
- int err = 0;
|
||
|
|
||
|
show_absolute_syms = 0;
|
||
|
show_absolute_relocs = 0;
|
||
|
as_text = 0;
|
||
|
+ use_real_mode = 0;
|
||
|
fname = NULL;
|
||
|
for (i = 1; i < argc; i++) {
|
||
|
char *arg = argv[i];
|
||
|
if (*arg == '-') {
|
||
|
- if (strcmp(argv[1], "--abs-syms") == 0) {
|
||
|
+ if (strcmp(arg, "--abs-syms") == 0) {
|
||
|
show_absolute_syms = 1;
|
||
|
continue;
|
||
|
}
|
||
|
-
|
||
|
- if (strcmp(argv[1], "--abs-relocs") == 0) {
|
||
|
+ if (strcmp(arg, "--abs-relocs") == 0) {
|
||
|
show_absolute_relocs = 1;
|
||
|
continue;
|
||
|
}
|
||
|
- else if (strcmp(argv[1], "--text") == 0) {
|
||
|
+ if (strcmp(arg, "--text") == 0) {
|
||
|
as_text = 1;
|
||
|
continue;
|
||
|
}
|
||
|
+ if (strcmp(arg, "--realmode") == 0) {
|
||
|
+ use_real_mode = 1;
|
||
|
+ continue;
|
||
|
+ }
|
||
|
}
|
||
|
else if (!fname) {
|
||
|
fname = arg;
|
||
|
@@ -663,10 +784,7 @@ int main(int argc, char **argv)
|
||
|
if (!fname) {
|
||
|
usage();
|
||
|
}
|
||
|
-
|
||
|
-
|
||
|
- regex_init();
|
||
|
-
|
||
|
+ regex_init(use_real_mode);
|
||
|
fp = fopen(fname, "r");
|
||
|
if (!fp) {
|
||
|
die("Cannot open %s: %s\n",
|
||
|
@@ -682,10 +800,9 @@ int main(int argc, char **argv)
|
||
|
return 0;
|
||
|
}
|
||
|
if (show_absolute_relocs) {
|
||
|
- print_absolute_relocs(stdout);
|
||
|
+ print_absolute_relocs();
|
||
|
return 0;
|
||
|
}
|
||
|
- err = print_absolute_relocs(stderr);
|
||
|
- emit_relocs(as_text);
|
||
|
- return err;
|
||
|
+ emit_relocs(as_text, use_real_mode);
|
||
|
+ return 0;
|
||
|
}
|