Add ix86 and ARM32 MacOS (embedded ELF) CI/CD

.github/workflows/macos-gcc.yml

@@ -8,8 +8,12 @@ jobs:
 
     strategy:
       matrix:
-        arch: [x64, aa64]
+        arch: [ia32, x64, aa64, arm]
         include:
+          - arch: ia32
+            dir: ia32
+            cross_compile: i686-elf-
+            toolchain: i686-elf-gcc
           - arch: x64
             dir: x86_64
             cross_compile: x86_64-elf-
@@ -18,7 +22,10 @@ jobs:
             dir: aarch64
             cross_compile: aarch64-elf-
             toolchain: aarch64-elf-gcc
-
+          - arch: arm
+            dir: arm
+            cross_compile: arm-none-eabi-
+            toolchain: arm-none-eabi-gcc
 
 
     steps:
@@ -33,7 +40,7 @@ jobs:
 
     - name: Build
       run: |
-        make ARCH=${{ matrix.arch }} CROSS_COMPILE=${{ matrix.cross_compile }} USING_APPLE=1
+        make ARCH=${{ matrix.arch }} CROSS_COMPILE=${{ matrix.cross_compile }}
 
     - name: Generate binary information
       run: ${{ matrix.cross_compile }}readelf -a ./${{ matrix.dir }}/apps/ctors_dtors_priority_test.so > ./${{ matrix.dir }}/apps/readelf.txt
@@ -51,18 +58,28 @@ jobs:
 
     strategy:
       matrix:
-        arch: [x64, aa64]
+        arch: [ia32, x64, aa64, arm]
         include:
         - arch: x64
           pkg: qemu-system-x86
           qemu_arch: x86_64
           qemu_opts: -M q35
           fw_base: OVMF
+        - arch: ia32
+          pkg: qemu-system-x86
+          qemu_arch: i386
+          qemu_opts: -M pc
+          fw_base: OVMF
         - arch: aa64
           pkg: qemu-system-arm
           qemu_arch: aarch64
           qemu_opts: -M virt -cpu cortex-a57
           fw_base: AAVMF
+        - arch: arm
+          pkg: qemu-system-arm
+          qemu_arch: arm
+          qemu_opts: -M virt -cpu cortex-a15
+          fw_base: AAVMF
 
     steps:
     - name: Set up Linux environment

Make.defaults

@@ -110,7 +110,7 @@ endif
 GCCVERSION   := $(shell $(CC) -dumpversion | sed -e 's/-win32/.0/' | cut -f1 -d.)
 GCCMINOR     := $(shell $(CC) -dumpversion | sed -e 's/-win32/.0/' | cut -f2 -d.)
 USING_CLANG  := $(shell $(CC) -v 2>&1 | grep -q 'clang version' && echo clang || echo 0)
-USING_APPLE  ?= 0
+USING_APPLE  ?= $(shell uname -s | grep -q 'Darwin' && echo 1 || echo 0)
 
 # Rely on GCC MS ABI support?
 GCCNEWENOUGH := $(shell ( [ $(GCCVERSION) -gt "4" ]           \
@@ -206,6 +206,12 @@ export SYSTEM_HAS_EFI_OBJCOPY ?= 0
 endif
 endif
 
+ifeq ($(ARCH),ia32)
+ifeq ($(USING_APPLE),1)
+export SYSTEM_HAS_EFI_OBJCOPY ?= 0
+endif
+endif
+
 ifeq ($(HAVE_EFI_OBJCOPY),y)
 export SYSTEM_HAS_EFI_OBJCOPY ?= 1
 else
@@ -255,6 +261,13 @@ ifeq ($(USING_CLANG),clang)
 CFLAGS += -gdwarf-4
 endif
 
+# Force hard float (for library mismatch)
+ifeq ($(ARCH),arm)
+ifeq ($(USING_APPLE),1)
+CFLAGS += -mfloat-abi=hard -mfpu=vfpv2
+endif
+endif
+
 ifeq ($(V),1)
 ARFLAGS := rDv
 else
@@ -264,9 +277,9 @@ ASFLAGS += $(ARCH3264)
 LDFLAGS += -nostdlib 
 ifeq ($(IS_MINGW32),)
   LDFLAGS += --warn-common --no-undefined --fatal-warnings \
-             --build-id=sha1 -z nocombreloc
+             --build-id=sha1
   ifeq ($(USING_APPLE),0)
-  LDFLAGS += -z norelro
+  LDFLAGS += -z norelro -z nocombreloc
   endif
 else
   LDFLAGS += -Wl,--warn-common -Wl,--no-undefined -Wl,--fatal-warnings \

Make.rules

@@ -45,8 +45,10 @@ ifeq ($(IS_MINGW32),)
 		    -j .rela -j .rel.* -j .rela.* -j .rel* -j .rela* \
 		    -j .areloc -j .reloc $(FORMAT) $*.so $@
 ifeq ($(ARCH),riscv64)
+ifeq ($(SYSTEM_HAS_EFI_OBJCOPY),0)
 	$(HIDE)/bin/echo -ne "$(CHAR_SUBSYSTEM)" | dd of=$@ bs=1 seek=156 count=1 conv=notrunc status=none
 endif
+endif
 
 %.efi.debug: %.so
 	@$(ECHO) "  OBJCOPY  $(notdir $@)"

gnuefi/Makefile

@@ -80,7 +80,7 @@ endif
 # on aarch64, avoid jump tables before all relocations have been processed
 reloc_aarch64.o: CFLAGS += -fno-jump-tables
 
-ifneq (,$(filter $(ARCH),aarch64 riscv64))
+ifneq (,$(filter $(ARCH),aarch64 riscv64 ia32))
 CRT0_LOCAL_TARGET = crt0-efi-$(ARCH)-local.o
 endif
 
@@ -116,7 +116,7 @@ ifneq (,$(findstring FreeBSD,$(OS)))
  ifeq ($(ARCH),x86_64)
 	$(INSTALL) -m 644 $(SRCDIR)/elf_$(ARCH)_fbsd_efi.lds $(INSTALLROOT)$(LIBDIR)
  else
-    ifneq (,$(filter $(ARCH),aarch64 riscv64))
+    ifneq (,$(filter $(ARCH),aarch64 riscv64 ia32))
         $(INSTALL) -m 644 $(SRCDIR)/elf_$(ARCH)_efi_local.lds $(INSTALLROOT)$(LIBDIR)
     endif
 	$(INSTALL) -m 644 $(SRCDIR)/elf_$(ARCH)_efi.lds $(INSTALLROOT)$(LIBDIR)

gnuefi/crt0-efi-ia32-local.S

@@ -0,0 +1,176 @@
+.section	.text.head
+
+	/*
+	 * Magic "MZ" signature for PE/COFF
+	 */
+	.globl	ImageBase
+ImageBase:
+	.ascii	"MZ"
+	.skip	58				// 'MZ' + pad + offset == 64
+	.4byte	pe_header - ImageBase		// Offset to the PE header.
+pe_header:
+	.ascii	"PE"
+	.2byte 	0
+coff_header:
+	.2byte	0x14c				// i386+
+	.2byte	4				// nr_sections
+	.4byte	0 				// TimeDateStamp
+	.4byte	0				// PointerToSymbolTable
+	.4byte	0				// NumberOfSymbols
+	.2byte	section_table - optional_header	// SizeOfOptionalHeader
+	.2byte	0x306				// Characteristics.
+						// IMAGE_FILE_32BIT_MACHINE |
+						// IMAGE_FILE_DEBUG_STRIPPED |
+						// IMAGE_FILE_EXECUTABLE_IMAGE |
+						// IMAGE_FILE_LINE_NUMS_STRIPPED
+optional_header:
+	.2byte	0x10b				// PE32+ format
+	.byte	0x02				// MajorLinkerVersion
+	.byte	0x14				// MinorLinkerVersion
+	.4byte	_etext - _start		// SizeOfCode
+	.4byte	_alldata_size - ImageBase		// SizeOfInitializedData
+	.4byte	0				// SizeOfUninitializedData
+	.4byte	_start - ImageBase		// AddressOfEntryPoint
+	.4byte	_start - ImageBase		// BaseOfCode
+	.4byte	_reloc - ImageBase		// BaseOfData
+
+extra_header_fields:
+	.4byte	0				// ImageBase
+	.4byte	0x1000				// SectionAlignment
+	.4byte	0x1000				// FileAlignment
+	.2byte	0				// MajorOperatingSystemVersion
+	.2byte	0				// MinorOperatingSystemVersion
+	.2byte	0				// MajorImageVersion
+	.2byte	0				// MinorImageVersion
+	.2byte	0				// MajorSubsystemVersion
+	.2byte	0				// MinorSubsystemVersion
+	.4byte	0				// Win32VersionValue
+
+	.4byte	_image_end - ImageBase		// SizeOfImage
+
+	// Everything before the kernel image is considered part of the header
+	.4byte	_start - ImageBase		// SizeOfHeaders
+	.4byte	0				// CheckSum
+	.2byte	EFI_SUBSYSTEM			// Subsystem
+	.2byte	0				// DllCharacteristics
+	.4byte	0				// SizeOfStackReserve
+	.4byte	0				// SizeOfStackCommit
+	.4byte	0				// SizeOfHeapReserve
+	.4byte	0				// SizeOfHeapCommit
+	.4byte	0				// LoaderFlags
+	.4byte	0x10				// NumberOfRvaAndSizes
+
+	.8byte	0				// ExportTable
+	.8byte	0				// ImportTable
+	.8byte	0				// ResourceTable
+	.8byte	0				// ExceptionTable
+	.8byte	0				// CertificationTable
+	.4byte	_reloc - ImageBase				// BaseRelocationTable (VirtualAddress)
+	.4byte	_reloc_vsize - ImageBase				// BaseRelocationTable (Size)
+	.8byte	0				// Debug
+	.8byte	0				// Architecture
+	.8byte	0				// Global Ptr
+	.8byte	0				// TLS Table
+	.8byte	0				// Load Config Table
+	.8byte	0				// Bound Import
+	.8byte	0				// IAT
+	.8byte	0				// Delay Import Descriptor
+	.8byte	0				// CLR Runtime Header
+	.8byte	0				// Reserved, must be zero
+
+	// Section table
+section_table:
+
+	.ascii	".text\0\0\0"
+	.4byte	_evtext - _start // VirtualSize
+	.4byte	_start - ImageBase	// VirtualAddress
+	.4byte	_etext - _start		// SizeOfRawData
+	.4byte	_start - ImageBase	// PointerToRawData
+	.4byte	0		// PointerToRelocations (0 for executables)
+	.4byte	0		// PointerToLineNumbers (0 for executables)
+	.2byte	0		// NumberOfRelocations  (0 for executables)
+	.2byte	0		// NumberOfLineNumbers  (0 for executables)
+	.4byte	0x60000020	// Characteristics (section flags)
+
+	/*
+	 * The EFI application loader requires a relocation section
+	 * because EFI applications must be relocatable.  This is a
+	 * dummy section as far as we are concerned.
+	 */
+	.ascii	".reloc\0\0"
+	.4byte	_reloc_vsize - ImageBase			// VirtualSize
+	.4byte	_reloc - ImageBase			// VirtualAddress
+	.4byte	_reloc_size - ImageBase			// SizeOfRawData
+	.4byte	_reloc - ImageBase			// PointerToRawData
+	.4byte	0			// PointerToRelocations
+	.4byte	0			// PointerToLineNumbers
+	.2byte	0			// NumberOfRelocations
+	.2byte	0			// NumberOfLineNumbers
+	.4byte	0x42000040		// Characteristics (section flags)
+
+	.ascii	".data\0\0\0"
+	.4byte	_data_vsize - ImageBase			// VirtualSize
+	.4byte	_data - ImageBase			// VirtualAddress
+	.4byte	_data_size - ImageBase			// SizeOfRawData
+	.4byte	_data - ImageBase			// PointerToRawData
+	.4byte	0			// PointerToRelocations
+	.4byte	0			// PointerToLineNumbers
+	.2byte	0			// NumberOfRelocations
+	.2byte	0			// NumberOfLineNumbers
+	.4byte	0xC0000040		// Characteristics (section flags)
+
+	.ascii	".rodata\0"
+	.4byte	_rodata_vsize - ImageBase			// VirtualSize
+	.4byte	_rodata - ImageBase			// VirtualAddress
+	.4byte	_rodata_size - ImageBase			// SizeOfRawData
+	.4byte	_rodata - ImageBase			// PointerToRawData
+	.4byte	0			// PointerToRelocations
+	.4byte	0			// PointerToLineNumbers
+	.2byte	0			// NumberOfRelocations
+	.2byte	0			// NumberOfLineNumbers
+	.4byte	0x40000040		// Characteristics (section flags)
+
+.globl	_start
+.type _start,%function
+_start:
+	pushl %ebp
+	movl %esp,%ebp
+
+	pushl 12(%ebp)			# copy "image" argument
+	pushl  8(%ebp)			# copy "systab" argument
+
+	call 0f
+0:	popl %eax
+	movl %eax,%ebx
+
+	addl $ImageBase-0b,%eax		# %eax = ldbase
+	addl $_DYNAMIC-0b,%ebx		# %ebx = _DYNAMIC
+
+	pushl %ebx			# pass _DYNAMIC as second argument
+	pushl %eax			# pass ldbase as first argument
+	call _relocate
+	popl %ebx
+	popl %ebx
+	testl %eax,%eax
+	jne .exit
+
+	call _entry			# call app with "image" and "systab" argument
+
+.exit:	leave
+	ret
+
+// hand-craft a dummy .reloc section so EFI knows it's a relocatable executable:
+
+ 	.data
+dummy:	.4byte	0
+
+#define IMAGE_REL_ABSOLUTE	0
+ 	.section .reloc
+ 	.4byte	dummy					// Page RVA
+	.4byte	12					// Block Size (2*4+2*2), must be aligned by 32 Bits
+	.2byte	(IMAGE_REL_ABSOLUTE<<12) +  0		// reloc for dummy
+	.2byte	(IMAGE_REL_ABSOLUTE<<12) +  0		// reloc for dummy
+
+#if defined(__ELF__) && defined(__linux__)
+	.section .note.GNU-stack,"",%progbits
+#endif

gnuefi/elf_aarch64_efi.lds

@@ -29,6 +29,7 @@ SECTIONS
     KEEP (*(.reloc))
   }
   . = ALIGN(4096);
+  _DYNAMIC = .;
   .dynamic  : { *(.dynamic) }
   . = ALIGN(4096);
   .data :

gnuefi/elf_aarch64_efi_local.lds

@@ -30,6 +30,7 @@ SECTIONS
   _reloc_size = _ereloc - _reloc;
   . = ALIGN(4096);
   _data = .;
+  _DYNAMIC = .;
   .dynamic  : { *(.dynamic) }
   . = ALIGN(4096);
   .data :

gnuefi/elf_arm_efi.lds

@@ -29,6 +29,7 @@ SECTIONS
   _reloc_size = _ereloc - _reloc;
   . = ALIGN(4096);
   _data = .;
+  _DYNAMIC = .;
   .dynamic  : { *(.dynamic) }
   . = ALIGN(4096);
   .data :

gnuefi/elf_ia32_efi.lds

@@ -69,6 +69,7 @@ SECTIONS
   .note.gnu.build-id : { *(.note.gnu.build-id) }
 
   . = ALIGN(4096);
+  _DYNAMIC = .;
   .dynamic  : { *(.dynamic) }
   . = ALIGN(4096);
   .rel :