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u-boot-a20-olinuxinomicro.25181
0026-efi_loader-Rename-sections-to-allow.patch
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File 0026-efi_loader-Rename-sections-to-allow.patch of Package u-boot-a20-olinuxinomicro.25181
From c9ef636123b2a8c29c9fc7cabed0fe856d19f879 Mon Sep 17 00:00:00 2001 From: Alexander Graf <agraf@suse.de> Date: Tue, 12 Jun 2018 07:48:37 +0200 Subject: [PATCH] efi_loader: Rename sections to allow for implicit data Some times gcc may generate data that is then used within code that may be part of an efi runtime section. That data could be jump tables, constants or strings. In order to make sure we catch these, we need to ensure that gcc emits them into a section that we can relocate together with all the other efi runtime bits. This only works if the -ffunction-sections and -fdata-sections flags are passed and the efi runtime functions are in a section that starts with ".text". Up to now we had all efi runtime bits in sections that did not interfere with the normal section naming scheme, but this forces us to do so. Hence we need to move the efi_loader text/data/rodata sections before the global *(.text*) catch-all section. With this patch in place, we should hopefully have an easier time to extend the efi runtime functionality in the future. Signed-off-by: Alexander Graf <agraf@suse.de> --- arch/arm/config.mk | 4 +-- arch/arm/cpu/armv8/u-boot.lds | 24 +++++++++------ arch/arm/cpu/u-boot.lds | 36 +++++++++++++---------- arch/arm/mach-zynq/u-boot.lds | 36 +++++++++++++---------- arch/sandbox/config.mk | 3 ++ arch/x86/config.mk | 2 +- arch/x86/cpu/u-boot.lds | 32 ++++++++++---------- board/qualcomm/dragonboard410c/u-boot.lds | 17 +++++++++-- board/qualcomm/dragonboard820c/u-boot.lds | 24 +++++++++------ board/ti/am335x/u-boot.lds | 36 +++++++++++++---------- include/efi_loader.h | 4 +-- 11 files changed, 133 insertions(+), 85 deletions(-) diff --git a/arch/arm/config.mk b/arch/arm/config.mk index 9c213b897c..40cfcd4265 100644 --- a/arch/arm/config.mk +++ b/arch/arm/config.mk @@ -137,11 +137,11 @@ endif ifdef CONFIG_ARM64 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \ -j .u_boot_list -j .rela.dyn -j .got -j .got.plt \ - -j .binman_sym_table + -j .binman_sym_table -j .text_rest else OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \ -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn \ - -j .binman_sym_table + -j .binman_sym_table -j .text_rest endif # if a dtb section exists we always have to include it diff --git a/arch/arm/cpu/armv8/u-boot.lds b/arch/arm/cpu/armv8/u-boot.lds index 7b76e0f9f0..9fa213cbf3 100644 --- a/arch/arm/cpu/armv8/u-boot.lds +++ b/arch/arm/cpu/armv8/u-boot.lds @@ -26,6 +26,19 @@ SECTIONS { *(.__image_copy_start) CPUDIR/start.o (.text*) + } + + /* This needs to come before *(.text*) */ + .efi_runtime : { + __efi_runtime_start = .; + *(.text.efi_runtime*) + *(.rodata.efi_runtime*) + *(.data.efi_runtime*) + __efi_runtime_stop = .; + } + + .text_rest : + { *(.text*) } @@ -99,17 +112,10 @@ SECTIONS . = ALIGN(8); - .efi_runtime : { - __efi_runtime_start = .; - *(efi_runtime_text) - *(efi_runtime_data) - __efi_runtime_stop = .; - } - .efi_runtime_rel : { __efi_runtime_rel_start = .; - *(.relaefi_runtime_text) - *(.relaefi_runtime_data) + *(.rel*.efi_runtime) + *(.rel*.efi_runtime.*) __efi_runtime_rel_stop = .; } diff --git a/arch/arm/cpu/u-boot.lds b/arch/arm/cpu/u-boot.lds index 37d4c605ac..ec7927b2f4 100644 --- a/arch/arm/cpu/u-boot.lds +++ b/arch/arm/cpu/u-boot.lds @@ -44,6 +44,25 @@ SECTIONS *(.__image_copy_start) *(.vectors) CPUDIR/start.o (.text*) + } + + /* This needs to come before *(.text*) */ + .__efi_runtime_start : { + *(.__efi_runtime_start) + } + + .efi_runtime : { + *(.text.efi_runtime*) + *(.rodata.efi_runtime*) + *(.data.efi_runtime*) + } + + .__efi_runtime_stop : { + *(.__efi_runtime_stop) + } + + .text_rest : + { *(.text*) } @@ -137,27 +156,14 @@ SECTIONS . = ALIGN(4); - .__efi_runtime_start : { - *(.__efi_runtime_start) - } - - .efi_runtime : { - *(efi_runtime_text) - *(efi_runtime_data) - } - - .__efi_runtime_stop : { - *(.__efi_runtime_stop) - } - .efi_runtime_rel_start : { *(.__efi_runtime_rel_start) } .efi_runtime_rel : { - *(.relefi_runtime_text) - *(.relefi_runtime_data) + *(.rel*.efi_runtime) + *(.rel*.efi_runtime.*) } .efi_runtime_rel_stop : diff --git a/arch/arm/mach-zynq/u-boot.lds b/arch/arm/mach-zynq/u-boot.lds index 86559cb6aa..06c57e8d55 100644 --- a/arch/arm/mach-zynq/u-boot.lds +++ b/arch/arm/mach-zynq/u-boot.lds @@ -20,6 +20,25 @@ SECTIONS *(.__image_copy_start) *(.vectors) CPUDIR/start.o (.text*) + } + + /* This needs to come before *(.text*) */ + .__efi_runtime_start : { + *(.__efi_runtime_start) + } + + .efi_runtime : { + *(.text.efi_runtime*) + *(.rodata.efi_runtime*) + *(.data.efi_runtime*) + } + + .__efi_runtime_stop : { + *(.__efi_runtime_stop) + } + + .text_rest : + { *(.text*) } @@ -42,27 +61,14 @@ SECTIONS . = ALIGN(4); - .__efi_runtime_start : { - *(.__efi_runtime_start) - } - - .efi_runtime : { - *(efi_runtime_text) - *(efi_runtime_data) - } - - .__efi_runtime_stop : { - *(.__efi_runtime_stop) - } - .efi_runtime_rel_start : { *(.__efi_runtime_rel_start) } .efi_runtime_rel : { - *(.relefi_runtime_text) - *(.relefi_runtime_data) + *(.rel*.efi_runtime) + *(.rel*.efi_runtime.*) } .efi_runtime_rel_stop : diff --git a/arch/sandbox/config.mk b/arch/sandbox/config.mk index 6d62abb035..405010f89c 100644 --- a/arch/sandbox/config.mk +++ b/arch/sandbox/config.mk @@ -5,6 +5,9 @@ PLATFORM_CPPFLAGS += -D__SANDBOX__ -U_FORTIFY_SOURCE PLATFORM_CPPFLAGS += -DCONFIG_ARCH_MAP_SYSMEM PLATFORM_LIBS += -lrt +LDFLAGS_FINAL += --gc-sections +PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections + # Define this to avoid linking with SDL, which requires SDL libraries # This can solve 'sdl-config: Command not found' errors ifneq ($(NO_SDL),) diff --git a/arch/x86/config.mk b/arch/x86/config.mk index 472ada5490..9cd51678cb 100644 --- a/arch/x86/config.mk +++ b/arch/x86/config.mk @@ -29,7 +29,7 @@ else PLATFORM_CPPFLAGS += $(if $(CONFIG_SPL_BUILD),,-fpic) -fno-common -m64 endif -PLATFORM_RELFLAGS += -ffunction-sections -fvisibility=hidden +PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections -fvisibility=hidden PLATFORM_LDFLAGS += -Bsymbolic -Bsymbolic-functions PLATFORM_LDFLAGS += -m $(if $(IS_32BIT),elf_i386,elf_x86_64) diff --git a/arch/x86/cpu/u-boot.lds b/arch/x86/cpu/u-boot.lds index 186718d8f9..bd53c29a49 100644 --- a/arch/x86/cpu/u-boot.lds +++ b/arch/x86/cpu/u-boot.lds @@ -18,6 +18,21 @@ SECTIONS . = CONFIG_SYS_TEXT_BASE; /* Location of bootcode in flash */ __text_start = .; + + .__efi_runtime_start : { + *(.__efi_runtime_start) + } + + .efi_runtime : { + *(.text.efi_runtime*) + *(.rodata.efi_runtime*) + *(.data.efi_runtime*) + } + + .__efi_runtime_stop : { + *(.__efi_runtime_stop) + } + .text : { *(.text*); } . = ALIGN(4); @@ -44,27 +59,14 @@ SECTIONS . = ALIGN(4); - .__efi_runtime_start : { - *(.__efi_runtime_start) - } - - .efi_runtime : { - *(efi_runtime_text) - *(efi_runtime_data) - } - - .__efi_runtime_stop : { - *(.__efi_runtime_stop) - } - .efi_runtime_rel_start : { *(.__efi_runtime_rel_start) } .efi_runtime_rel : { - *(.relefi_runtime_text) - *(.relefi_runtime_data) + *(.rel*.efi_runtime) + *(.rel*.efi_runtime.*) } .efi_runtime_rel_stop : diff --git a/board/qualcomm/dragonboard410c/u-boot.lds b/board/qualcomm/dragonboard410c/u-boot.lds index 62ac4d7a60..040e646cfe 100644 --- a/board/qualcomm/dragonboard410c/u-boot.lds +++ b/board/qualcomm/dragonboard410c/u-boot.lds @@ -21,6 +21,19 @@ SECTIONS *(.__image_copy_start) board/qualcomm/dragonboard410c/head.o (.text*) CPUDIR/start.o (.text*) + } + + /* This needs to come before *(.text*) */ + .efi_runtime : { + __efi_runtime_start = .; + *(.text.efi_runtime*) + *(.rodata.efi_runtime*) + *(.data.efi_runtime*) + __efi_runtime_stop = .; + } + + .text_rest : + { *(.text*) } @@ -52,8 +65,8 @@ SECTIONS .efi_runtime_rel : { __efi_runtime_rel_start = .; - *(.relaefi_runtime_text) - *(.relaefi_runtime_data) + *(.rel*.efi_runtime) + *(.rel*.efi_runtime.*) __efi_runtime_rel_stop = .; } diff --git a/board/qualcomm/dragonboard820c/u-boot.lds b/board/qualcomm/dragonboard820c/u-boot.lds index b84b4ac8b3..9a1125c26a 100644 --- a/board/qualcomm/dragonboard820c/u-boot.lds +++ b/board/qualcomm/dragonboard820c/u-boot.lds @@ -21,6 +21,19 @@ SECTIONS *(.__image_copy_start) board/qualcomm/dragonboard820c/head.o (.text*) CPUDIR/start.o (.text*) + } + + /* This needs to come before *(.text*) */ + .efi_runtime : { + __efi_runtime_start = .; + *(.text.efi_runtime*) + *(.rodata.efi_runtime*) + *(.data.efi_runtime*) + __efi_runtime_stop = .; + } + + .text_rest : + { *(.text*) } @@ -43,17 +56,10 @@ SECTIONS . = ALIGN(8); - .efi_runtime : { - __efi_runtime_start = .; - *(efi_runtime_text) - *(efi_runtime_data) - __efi_runtime_stop = .; - } - .efi_runtime_rel : { __efi_runtime_rel_start = .; - *(.relaefi_runtime_text) - *(.relaefi_runtime_data) + *(.rel*.efi_runtime) + *(.rel*.efi_runtime.*) __efi_runtime_rel_stop = .; } diff --git a/board/ti/am335x/u-boot.lds b/board/ti/am335x/u-boot.lds index a56cc8216b..03c1d5f73b 100644 --- a/board/ti/am335x/u-boot.lds +++ b/board/ti/am335x/u-boot.lds @@ -37,6 +37,25 @@ SECTIONS *(.vectors) CPUDIR/start.o (.text*) board/ti/am335x/built-in.o (.text*) + } + + /* This needs to come before *(.text*) */ + .__efi_runtime_start : { + *(.__efi_runtime_start) + } + + .efi_runtime : { + *(.text.efi_runtime*) + *(.rodata.efi_runtime*) + *(.data.efi_runtime*) + } + + .__efi_runtime_stop : { + *(.__efi_runtime_stop) + } + + .text_rest : + { *(.text*) } @@ -59,27 +78,14 @@ SECTIONS . = ALIGN(4); - .__efi_runtime_start : { - *(.__efi_runtime_start) - } - - .efi_runtime : { - *(efi_runtime_text) - *(efi_runtime_data) - } - - .__efi_runtime_stop : { - *(.__efi_runtime_stop) - } - .efi_runtime_rel_start : { *(.__efi_runtime_rel_start) } .efi_runtime_rel : { - *(.relefi_runtime_text) - *(.relefi_runtime_data) + *(.rel*.efi_runtime) + *(.rel*.efi_runtime.*) } .efi_runtime_rel_stop : diff --git a/include/efi_loader.h b/include/efi_loader.h index 07730c3f39..d82cf9738e 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -341,8 +341,8 @@ static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2) * Use these to indicate that your code / data should go into the EFI runtime * section and thus still be available when the OS is running */ -#define __efi_runtime_data __attribute__ ((section ("efi_runtime_data"))) -#define __efi_runtime __attribute__ ((section ("efi_runtime_text"))) +#define __efi_runtime_data __attribute__ ((section (".data.efi_runtime"))) +#define __efi_runtime __attribute__ ((section (".text.efi_runtime"))) /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region * to make it available at runtime */
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