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There is a lot of overlap in building firmware for other platforms from source, so it makes sense to have one source package. Signed-off-by: James Le Cuirot <chewi@gentoo.org>
44 lines
2.5 KiB
Diff
44 lines
2.5 KiB
Diff
https://bugs.gentoo.org/913110
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https://github.com/tianocore/edk2/commit/a257988f590ba90dd8394dd6bc7014ae9d814a08
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From a257988f590ba90dd8394dd6bc7014ae9d814a08 Mon Sep 17 00:00:00 2001
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From: Ard Biesheuvel <ardb@kernel.org>
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Date: Mon, 3 Apr 2023 22:29:15 +0800
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Subject: [PATCH] BaseTools/tools_def CLANGDWARF: Permit text relocations
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We rely on PIE executables to get the codegen that is suitable for
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PE/COFF conversion where the resulting executables can be loaded
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anywhere in the address space.
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However, ELF linkers may default to disallowing text relocations in PIE
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executables, as this would require text segments to be updated at
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runtime, which is bad for security and increases the copy-on-write
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footprint of ELF executables and shared libraries.
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However, none of those concerns apply to PE/COFF executables in the
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context of EFI, which are copied into memory rather than mmap()'ed, and
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fixed up by the loader before launch.
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So pass -z notext to the LLD linker to permit runtime relocations in
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read-only sections.
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Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
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Reviewed-by: Rebecca Cran <rebecca@bsdio.com>
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---
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BaseTools/Conf/tools_def.template | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
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index 39c49b8001f4..9a5c11f6a385 100755
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--- a/BaseTools/Conf/tools_def.template
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+++ b/BaseTools/Conf/tools_def.template
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@@ -2870,7 +2870,7 @@ DEFINE CLANGDWARF_X64_PREFIX = ENV(CLANG_BIN)
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DEFINE CLANGDWARF_IA32_X64_DLINK_COMMON = -nostdlib -Wl,-q,--gc-sections -z max-page-size=0x40
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DEFINE CLANGDWARF_DLINK2_FLAGS_COMMON = -Wl,--script=$(EDK_TOOLS_PATH)/Scripts/ClangBase.lds
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DEFINE CLANGDWARF_IA32_X64_ASLDLINK_FLAGS = DEF(CLANGDWARF_IA32_X64_DLINK_COMMON) -Wl,--defsym=PECOFF_HEADER_SIZE=0 DEF(CLANGDWARF_DLINK2_FLAGS_COMMON) -Wl,--entry,ReferenceAcpiTable -u ReferenceAcpiTable
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-DEFINE CLANGDWARF_IA32_X64_DLINK_FLAGS = DEF(CLANGDWARF_IA32_X64_DLINK_COMMON) -Wl,--entry,$(IMAGE_ENTRY_POINT) -u $(IMAGE_ENTRY_POINT) -Wl,-Map,$(DEST_DIR_DEBUG)/$(BASE_NAME).map,--whole-archive
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+DEFINE CLANGDWARF_IA32_X64_DLINK_FLAGS = DEF(CLANGDWARF_IA32_X64_DLINK_COMMON) -Wl,--entry,$(IMAGE_ENTRY_POINT) -u $(IMAGE_ENTRY_POINT) -Wl,-Map,$(DEST_DIR_DEBUG)/$(BASE_NAME).map,--whole-archive -Wl,-z,notext
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DEFINE CLANGDWARF_IA32_DLINK2_FLAGS = -Wl,--defsym=PECOFF_HEADER_SIZE=0x220 DEF(CLANGDWARF_DLINK2_FLAGS_COMMON)
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DEFINE CLANGDWARF_X64_DLINK2_FLAGS = -Wl,--defsym=PECOFF_HEADER_SIZE=0x228 DEF(CLANGDWARF_DLINK2_FLAGS_COMMON)
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