File seabios.699a4e5d6919cc8eae5342443025ceb6909dc27... of Package xen

Overview Repositories Revisions Requests Users Attributes Meta

File seabios.699a4e5d6919cc8eae5342443025ceb6909dc276.patch of Package xen (Revision 3b077056294bcb49994ea3227248b4ad)

Currently displaying revision 3b077056294bcb49994ea3227248b4ad , Show latest

From: Kevin O'Connor <kevin@koconnor.net>
Date: Wed, 22 Jul 2020 11:31:40 -0400
Subject: 699a4e5d6919cc8eae5342443025ceb6909dc276

ldnoexec: Add script to remove ET_EXEC flag from intermediate build objects

Add a script to remove the ET_EXEC flag from the 16bit and "32bit
segmented" intermediate objects.  This avoids build failures with some
linkers that will not allow linking these objects again.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
---
 Makefile            |  9 +--
 scripts/ldnoexec.py | 32 +++++++++
 2 files changed, 37 insertions(+), 4 deletions(-)
 create mode 100755 scripts/ldnoexec.py

--- a/Makefile
+++ b/Makefile
@@ -109,27 +109,28 @@ endif
 ifeq "$(TESTGCC)" "0"
 # Use -fwhole-program
 CFLAGSWHOLE=-fwhole-program -DWHOLE_PROGRAM
 endif
 
 # Do a whole file compile by textually including all C code.
 define whole-compile
 @echo "  Compiling whole program $3"
 $(Q)printf '$(foreach i,$2,#include "$i"\n)' > $3.tmp.c
 $(Q)$(CC) -I. $1 $(CFLAGSWHOLE) -c $3.tmp.c -o $3
 endef
 
-%.strip.o: %.o
+%.noexec.o: %.o
 	@echo "  Stripping $@"
-	$(Q)$(STRIP) $< -o $@
+	$(Q)$(STRIP) $< -o $<.strip.o
+	$(Q)$(PYTHON) ./scripts/ldnoexec.py $<.strip.o $@
 
 $(OUT)%.s: %.c
 	@echo "  Compiling to assembler $@"
 	$(Q)$(CC) $(CFLAGS16) -S -c $< -o $@
 
 $(OUT)%.o: %.c $(OUT)autoconf.h
 	@echo "  Compile checking $@"
 	$(Q)$(CC) $(CFLAGS32FLAT) -c $< -o $@
 
 $(OUT)%.lds: %.lds.S
 	@echo "  Precompiling $@"
 	$(Q)$(CPP) $(CPPFLAGS) -D__ASSEMBLY__ $< -o $@
@@ -167,27 +168,27 @@ $(OUT)romlayout16.lds: $(OUT)ccode32flat.o $(OUT)code32seg.o $(OUT)ccode16.o $(O
 # These are actually built by scripts/layoutrom.py above, but by pulling them
 # into an extra rule we prevent make -j from spawning layoutrom.py 4 times.
 $(OUT)romlayout32seg.lds $(OUT)romlayout32flat.lds $(OUT)code32flat.o $(OUT)code16.o: $(OUT)romlayout16.lds
 
 $(OUT)rom16.o: $(OUT)code16.o $(OUT)romlayout16.lds
 	@echo "  Linking $@"
 	$(Q)$(LD) -T $(OUT)romlayout16.lds $< -o $@
 
 $(OUT)rom32seg.o: $(OUT)code32seg.o $(OUT)romlayout32seg.lds
 	@echo "  Linking $@"
 	$(Q)$(LD) -T $(OUT)romlayout32seg.lds $< -o $@
 
-$(OUT)rom.o: $(OUT)rom16.strip.o $(OUT)rom32seg.strip.o $(OUT)code32flat.o $(OUT)romlayout32flat.lds
+$(OUT)rom.o: $(OUT)rom16.noexec.o $(OUT)rom32seg.noexec.o $(OUT)code32flat.o $(OUT)romlayout32flat.lds
 	@echo "  Linking $@"
-	$(Q)$(LD) -N -T $(OUT)romlayout32flat.lds $(OUT)rom16.strip.o $(OUT)rom32seg.strip.o $(OUT)code32flat.o -o $@
+	$(Q)$(LD) -N -T $(OUT)romlayout32flat.lds $(OUT)rom16.noexec.o $(OUT)rom32seg.noexec.o $(OUT)code32flat.o -o $@
 
 $(OUT)bios.bin.prep: $(OUT)rom.o scripts/checkrom.py
 	@echo "  Prepping $@"
 	$(Q)rm -f $(OUT)bios.bin $(OUT)Csm16.bin $(OUT)bios.bin.elf
 	$(Q)$(OBJDUMP) -thr $< > $<.objdump
 	$(Q)$(OBJCOPY) -O binary $< $(OUT)bios.bin.raw
 	$(Q)$(PYTHON) ./scripts/checkrom.py $<.objdump $(CONFIG_ROM_SIZE) $(OUT)bios.bin.raw $(OUT)bios.bin.prep
 
 $(OUT)bios.bin: $(OUT)bios.bin.prep
 	@echo "  Creating $@"
 	$(Q)cp $< $@
 
new file mode 100755
--- /dev/null
+++ b/scripts/ldnoexec.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+# Script to remove EXEC flag from an ELF file
+#
+# Copyright (C) 2020  Kevin O'Connor <kevin@koconnor.net>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+import optparse
+
+FLAG_OFFSET = 16
+
+def main():
+    # Parse command-line arguments
+    usage = "%prog <input_file> <output_file>"
+    opts = optparse.OptionParser(usage)
+    options, args = opts.parse_args()
+    if len(args) != 2:
+        opts.error("Incorrect number of arguments")
+    infilename, outfilename = args
+    # Read input
+    f = open(infilename, "rb")
+    srcdata = f.read()
+    f.close()
+    # Update
+    outdata = bytearray(srcdata)
+    outdata[FLAG_OFFSET] = 0x01 # change ET_EXEC to ET_REL
+    # Write output
+    f = open(outfilename, "wb")
+    f.write(outdata)
+    f.close()
+
+if __name__ == '__main__':
+    main()

Places

File seabios.699a4e5d6919cc8eae5342443025ceb6909dc276.patch of Package xen (Revision 3b077056294bcb49994ea3227248b4ad)

Places