From 0b7cb74a17a6eea07b2d9319db33ec3332db0216 Mon Sep 17 00:00:00 2001
From: Regia König
Date: Wed, 17 Aug 2022 11:50:55 +0200
Subject: Save old Makefile version without debug, but running

---
 GNU_efi_HelloWorld/Makefile_save | 36 ++++++++++++++++++++++++++++++++++++
 documentation/GNU-efi            | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 72 insertions(+)
 create mode 100644 GNU_efi_HelloWorld/Makefile_save

diff --git a/GNU_efi_HelloWorld/Makefile_save b/GNU_efi_HelloWorld/Makefile_save
new file mode 100644
index 0000000..6ae963d
--- /dev/null
+++ b/GNU_efi_HelloWorld/Makefile_save
@@ -0,0 +1,36 @@
+ARCH		= $(shell uname -m | sed s,i[3456789]86,ia32,)
+
+OBJS		= hello.o
+TARGET		= hello.efi
+
+EFIINC		= /usr/include/efi
+EFFINCS		= -I$(EFIINC) -I$(EFIINC)/$(ARCH) -I$(EFIINC)/protocol
+EFILIB		= /usr/lib
+EFI_CRT_OBJS	= $(EFILIB)/crt0-efi-$(ARCH).o
+EFI_LDS		= $(EFILIB)/elf_$(ARCH)_efi.lds
+
+CFLAGS		= $(EFFINCS) -fno-stack-protector -fpic \
+			-fshort-wchar -mno-red-zone -Wall
+
+ifeq ($(ARCH),x86_64)
+	CFLAGS += -DEFI_FUNCTION_WRAPPER
+endif
+
+LDFLAGS		= -nostdlib -znocombreloc -T $(EFI_LDS) -shared \
+			-Bsymbolic -L $(EFILIB) $(EFI_CRT_OBJS)
+
+all: $(TARGET)
+	cp hello.efi ../test_code/hda-contents/
+
+hello.so: $(OBJS)
+	ld $(LDFLAGS) $(OBJS) -o $@ -lefi -lgnuefi
+
+%.efi: %.so
+	objcopy -j .text -j .sdata -j .data -j .dynamic \
+	-j .dynsym -j .rel -j .rela -j .reloc \
+	--target=efi-app-$(ARCH) $^ $@
+
+clear:
+	rm *.efi
+	rm *.o
+	rm *.so
diff --git a/documentation/GNU-efi b/documentation/GNU-efi
index 5d75960..1efe81c 100644
--- a/documentation/GNU-efi
+++ b/documentation/GNU-efi
@@ -190,3 +190,39 @@ ST->ConOut->OutputString(ST->ConOut, buffer);
 #	https://wiki.osdev.org/Debugging_UEFI_applications_with_GDB		#
 #################################################################################
 
+Makefile at:
+https://sourceforge.net/p/ast-phoenix/code/ci/master/tree/kernel/boot/Makefile#l72
+
+EFI firmware is unable to launch binaries with debug sections. What you need is
+to create two EFI binaries - one with only required sections to upload it to
+target system and another one with debug symbols to use with GDB. Actually you 
+just need to run objcopy utility twice with different set of sections to copy and
+different output files. (See Makefile example)
+
+To load image with symbols to relocated addresses for .text and .data sections,
+you need to add ImageBase address to their offsets:
+
+*********************************************************************************
+* # gdb hello.efi								*
+* (gdb) info files								*
+* ...										*
+* Entry point: 0x3000								*
+* 3000 - ... is .text								*
+* c00 - ... is .data								*
+* (gdb) file			|| unload file					*
+* add-symbol-table hello.efi (ImageBase+text-off) -s .data (ImageBase+data-off)	*
+*********************************************************************************
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-- 
cgit v1.2.3-55-g7522