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grub2.27717
0031-util-mkimage-Unify-more-of-the-PE32-and-PE...
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File 0031-util-mkimage-Unify-more-of-the-PE32-and-PE32-header-.patch of Package grub2.27717
From a5d91042a8a9bfba5aad7c9a5735cc33dae9e240 Mon Sep 17 00:00:00 2001 From: Peter Jones <pjones@redhat.com> Date: Mon, 15 Feb 2021 14:19:31 +0100 Subject: [PATCH 31/41] util/mkimage: Unify more of the PE32 and PE32+ header set-up There's quite a bit of code duplication in the code that sets the optional header for PE32 and PE32+. The two are very similar with the exception of a few fields that have type grub_uint64_t instead of grub_uint32_t. Factor out the common code and add a PE_OHDR() macro that simplifies the set-up and make the code more readable. Signed-off-by: Peter Jones <pjones@redhat.com> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> --- util/mkimage.c | 111 +++++++++++++++++++++++-------------------------- 1 file changed, 51 insertions(+), 60 deletions(-) diff --git a/util/mkimage.c b/util/mkimage.c index edd69b0cf..32376ac54 100644 --- a/util/mkimage.c +++ b/util/mkimage.c @@ -748,6 +748,21 @@ grub_install_get_image_targets_string (void) return formats; } +/* + * tmp_ is just here so the compiler knows we'll never derefernce a NULL. + * It should get fully optimized away. + */ +#define PE_OHDR(o32, o64, field) (*( \ +{ \ + __typeof__((o64)->field) tmp_; \ + __typeof__((o64)->field) *ret_ = &tmp_; \ + if (o32) \ + ret_ = (void *)(&((o32)->field)); \ + else if (o64) \ + ret_ = (void *)(&((o64)->field)); \ + ret_; \ +})) + void grub_install_generate_image (const char *dir, const char *prefix, FILE *out, const char *outname, char *mods[], @@ -1171,6 +1186,8 @@ grub_install_generate_image (const char *dir, const char *prefix, static const grub_uint8_t stub[] = GRUB_PE32_MSDOS_STUB; int header_size; int reloc_addr; + struct grub_pe32_optional_header *o32 = NULL; + struct grub_pe64_optional_header *o64 = NULL; if (image_target->voidp_sizeof == 4) header_size = EFI32_HEADER_SIZE; @@ -1212,76 +1229,50 @@ grub_install_generate_image (const char *dir, const char *prefix, /* The PE Optional header. */ if (image_target->voidp_sizeof == 4) { - struct grub_pe32_optional_header *o; - c->optional_header_size = grub_host_to_target16 (sizeof (struct grub_pe32_optional_header)); - o = (struct grub_pe32_optional_header *) - (header + GRUB_PE32_MSDOS_STUB_SIZE + GRUB_PE32_SIGNATURE_SIZE - + sizeof (struct grub_pe32_coff_header)); - o->magic = grub_host_to_target16 (GRUB_PE32_PE32_MAGIC); - o->code_size = grub_host_to_target32 (layout.exec_size); - o->data_size = grub_host_to_target32 (reloc_addr - layout.exec_size - - header_size); - o->entry_addr = grub_host_to_target32 (layout.start_address); - o->code_base = grub_host_to_target32 (header_size); - - o->data_base = grub_host_to_target32 (header_size + layout.exec_size); - - o->image_base = 0; - o->section_alignment = grub_host_to_target32 (image_target->section_align); - o->file_alignment = grub_host_to_target32 (GRUB_PE32_FILE_ALIGNMENT); - o->image_size = grub_host_to_target32 (pe_size); - o->header_size = grub_host_to_target32 (header_size); - o->subsystem = grub_host_to_target16 (GRUB_PE32_SUBSYSTEM_EFI_APPLICATION); - - /* Do these really matter? */ - o->stack_reserve_size = grub_host_to_target32 (0x10000); - o->stack_commit_size = grub_host_to_target32 (0x10000); - o->heap_reserve_size = grub_host_to_target32 (0x10000); - o->heap_commit_size = grub_host_to_target32 (0x10000); - - o->num_data_directories = grub_host_to_target32 (GRUB_PE32_NUM_DATA_DIRECTORIES); + o32 = (struct grub_pe32_optional_header *) + (header + GRUB_PE32_MSDOS_STUB_SIZE + GRUB_PE32_SIGNATURE_SIZE + + sizeof (struct grub_pe32_coff_header)); + o32->magic = grub_host_to_target16 (GRUB_PE32_PE32_MAGIC); + o32->data_base = grub_host_to_target32 (header_size + layout.exec_size); - o->base_relocation_table.rva = grub_host_to_target32 (reloc_addr); - o->base_relocation_table.size = grub_host_to_target32 (layout.reloc_size); - sections = o + 1; + sections = o32 + 1; } else { - struct grub_pe64_optional_header *o; - c->optional_header_size = grub_host_to_target16 (sizeof (struct grub_pe64_optional_header)); - o = (struct grub_pe64_optional_header *) - (header + GRUB_PE32_MSDOS_STUB_SIZE + GRUB_PE32_SIGNATURE_SIZE - + sizeof (struct grub_pe32_coff_header)); - o->magic = grub_host_to_target16 (GRUB_PE32_PE64_MAGIC); - o->code_size = grub_host_to_target32 (layout.exec_size); - o->data_size = grub_host_to_target32 (reloc_addr - layout.exec_size - - header_size); - o->entry_addr = grub_host_to_target32 (layout.start_address); - o->code_base = grub_host_to_target32 (header_size); - o->image_base = 0; - o->section_alignment = grub_host_to_target32 (image_target->section_align); - o->file_alignment = grub_host_to_target32 (GRUB_PE32_FILE_ALIGNMENT); - o->image_size = grub_host_to_target32 (pe_size); - o->header_size = grub_host_to_target32 (header_size); - o->subsystem = grub_host_to_target16 (GRUB_PE32_SUBSYSTEM_EFI_APPLICATION); - - /* Do these really matter? */ - o->stack_reserve_size = grub_host_to_target32 (0x10000); - o->stack_commit_size = grub_host_to_target32 (0x10000); - o->heap_reserve_size = grub_host_to_target32 (0x10000); - o->heap_commit_size = grub_host_to_target32 (0x10000); - - o->num_data_directories - = grub_host_to_target32 (GRUB_PE32_NUM_DATA_DIRECTORIES); + o64 = (struct grub_pe64_optional_header *) + (header + GRUB_PE32_MSDOS_STUB_SIZE + GRUB_PE32_SIGNATURE_SIZE + + sizeof (struct grub_pe32_coff_header)); + o64->magic = grub_host_to_target16 (GRUB_PE32_PE64_MAGIC); - o->base_relocation_table.rva = grub_host_to_target32 (reloc_addr); - o->base_relocation_table.size = grub_host_to_target32 (layout.reloc_size); - sections = o + 1; + sections = o64 + 1; } + + PE_OHDR (o32, o64, code_size) = grub_host_to_target32 (layout.exec_size); + PE_OHDR (o32, o64, data_size) = grub_host_to_target32 (reloc_addr - layout.exec_size - header_size); + PE_OHDR (o32, o64, entry_addr) = grub_host_to_target32 (layout.start_address); + PE_OHDR (o32, o64, code_base) = grub_host_to_target32 (header_size); + + PE_OHDR (o32, o64, image_base) = 0; + PE_OHDR (o32, o64, section_alignment) = grub_host_to_target32 (image_target->section_align); + PE_OHDR (o32, o64, file_alignment) = grub_host_to_target32 (GRUB_PE32_FILE_ALIGNMENT); + PE_OHDR (o32, o64, image_size) = grub_host_to_target32 (pe_size); + PE_OHDR (o32, o64, header_size) = grub_host_to_target32 (header_size); + PE_OHDR (o32, o64, subsystem) = grub_host_to_target16 (GRUB_PE32_SUBSYSTEM_EFI_APPLICATION); + + /* Do these really matter? */ + PE_OHDR (o32, o64, stack_reserve_size) = grub_host_to_target32 (0x10000); + PE_OHDR (o32, o64, stack_commit_size) = grub_host_to_target32 (0x10000); + PE_OHDR (o32, o64, heap_reserve_size) = grub_host_to_target32 (0x10000); + PE_OHDR (o32, o64, heap_commit_size) = grub_host_to_target32 (0x10000); + + PE_OHDR (o32, o64, num_data_directories) = grub_host_to_target32 (GRUB_PE32_NUM_DATA_DIRECTORIES); + PE_OHDR (o32, o64, base_relocation_table.rva) = grub_host_to_target32 (reloc_addr); + PE_OHDR (o32, o64, base_relocation_table.size) = grub_host_to_target32 (layout.reloc_size); + /* The sections. */ text_section = sections; strcpy (text_section->name, ".text"); -- 2.26.2
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