From: Peter Jones <pjo...@redhat.com>
In order to properly validate a loaded kernel's support for being loaded
without a writable stack or executable, we need to be able to properly
parse arbitrary PE headers.
Currently, pe32.h is written in such a way that the MS-DOS header that
tells us where to find the PE header in the binary can't be accessed.
Further, for some reason it calls the DOS MZ magic "GRUB_PE32_MAGIC".
This patch adds the structure for the DOS header, renames the DOS magic
define, and adds defines for the actual PE magic.
Signed-off-by: Peter Jones <pjo...@redhat.com>
(cherry picked from commit c850db5c0478c8328ebdd48ee8cce02995d4ead0)
Signed-off-by: Jan Setje-Eilers <jan.setjeeil...@oracle.com>
Conflicts:
grub-core/loader/arm64/linux.c (deleted)
include/grub/efi/pe32.h (fixup)
Signed-off-by: Mate Kukri <mate.ku...@canonical.com>
---
include/grub/efi/pe32.h | 98 ++++++++++++++++++++++++++++++++++++++---
1 file changed, 92 insertions(+), 6 deletions(-)
diff --git a/include/grub/efi/pe32.h b/include/grub/efi/pe32.h
index 4e6e9d254..20db6be19 100644
--- a/include/grub/efi/pe32.h
+++ b/include/grub/efi/pe32.h
@@ -48,6 +48,29 @@
#define GRUB_PE32_MAGIC 0x5a4d
+struct grub_dos_header
+{
+ grub_uint16_t magic;
+ grub_uint16_t cblp;
+ grub_uint16_t cp;
+ grub_uint16_t crlc;
+ grub_uint16_t cparhdr;
+ grub_uint16_t minalloc;
+ grub_uint16_t maxalloc;
+ grub_uint16_t ss;
+ grub_uint16_t sp;
+ grub_uint16_t csum;
+ grub_uint16_t ip;
+ grub_uint16_t cs;
+ grub_uint16_t lfarlc;
+ grub_uint16_t ovno;
+ grub_uint16_t res0[4];
+ grub_uint16_t oemid;
+ grub_uint16_t oeminfo;
+ grub_uint16_t res1[10];
+ grub_uint32_t lfanew;
+};
+
struct grub_msdos_image_header
{
/* This is always 'MZ'. (GRUB_PE32_MAGIC) */
@@ -171,6 +194,8 @@ struct grub_pe32_optional_header
struct grub_pe32_data_directory reserved_entry;
};
+#define GRUB_PE32_NX_COMPAT 0x0100
+
struct grub_pe64_optional_header
{
grub_uint16_t magic;
@@ -236,7 +261,11 @@ struct grub_pe64_optional_header
struct grub_pe32_section_table
{
char name[8];
- grub_uint32_t virtual_size;
+ union
+ {
+ grub_uint32_t physical_address;
+ grub_uint32_t virtual_size;
+ };
grub_uint32_t virtual_address;
grub_uint32_t raw_data_size;
grub_uint32_t raw_data_offset;
@@ -247,12 +276,18 @@ struct grub_pe32_section_table
grub_uint32_t characteristics;
};
+#define GRUB_PE32_SCN_TYPE_NO_PAD 0x00000008
#define GRUB_PE32_SCN_CNT_CODE 0x00000020
#define GRUB_PE32_SCN_CNT_INITIALIZED_DATA 0x00000040
-#define GRUB_PE32_SCN_MEM_DISCARDABLE 0x02000000
-#define GRUB_PE32_SCN_MEM_EXECUTE 0x20000000
-#define GRUB_PE32_SCN_MEM_READ 0x40000000
-#define GRUB_PE32_SCN_MEM_WRITE 0x80000000
+#define GRUB_PE32_SCN_CNT_UNINITIALIZED_DATA 0x00000080
+#define GRUB_PE32_SCN_LNK_OTHER 0x00000100
+#define GRUB_PE32_SCN_LNK_INFO 0x00000200
+#define GRUB_PE32_SCN_LNK_REMOVE 0x00000800
+#define GRUB_PE32_SCN_LNK_COMDAT 0x00001000
+#define GRUB_PE32_SCN_GPREL 0x00008000
+#define GRUB_PE32_SCN_MEM_16BIT 0x00020000
+#define GRUB_PE32_SCN_MEM_LOCKED 0x00040000
+#define GRUB_PE32_SCN_MEM_PRELOAD 0x00080000
#define GRUB_PE32_SCN_ALIGN_1BYTES 0x00100000
#define GRUB_PE32_SCN_ALIGN_2BYTES 0x00200000
@@ -261,11 +296,28 @@ struct grub_pe32_section_table
#define GRUB_PE32_SCN_ALIGN_16BYTES 0x00500000
#define GRUB_PE32_SCN_ALIGN_32BYTES 0x00600000
#define GRUB_PE32_SCN_ALIGN_64BYTES 0x00700000
+#define GRUB_PE32_SCN_ALIGN_128BYTES 0x00800000
+#define GRUB_PE32_SCN_ALIGN_256BYTES 0x00900000
+#define GRUB_PE32_SCN_ALIGN_512BYTES 0x00A00000
+#define GRUB_PE32_SCN_ALIGN_1024BYTES 0x00B00000
+#define GRUB_PE32_SCN_ALIGN_2048BYTES 0x00C00000
+#define GRUB_PE32_SCN_ALIGN_4096BYTES 0x00D00000
+#define GRUB_PE32_SCN_ALIGN_8192BYTES 0x00E00000
#define GRUB_PE32_SCN_ALIGN_SHIFT 20
#define GRUB_PE32_SCN_ALIGN_MASK 7
-#define GRUB_PE32_SIGNATURE_SIZE 4
+#define GRUB_PE32_SCN_LNK_NRELOC_OVFL 0x01000000
+#define GRUB_PE32_SCN_MEM_DISCARDABLE 0x02000000
+#define GRUB_PE32_SCN_MEM_NOT_CACHED 0x04000000
+#define GRUB_PE32_SCN_MEM_NOT_PAGED 0x08000000
+#define GRUB_PE32_SCN_MEM_SHARED 0x10000000
+#define GRUB_PE32_SCN_MEM_EXECUTE 0x20000000
+#define GRUB_PE32_SCN_MEM_READ 0x40000000
+#define GRUB_PE32_SCN_MEM_WRITE 0x80000000
+
+#define GRUB_PE32_SIGNATURE_SIZE 4
+#define GRUB_PE32_SIGNATURE "PE\0\0"
#if GRUB_TARGET_SIZEOF_VOID_P == 8
#define GRUB_PE32_NATIVE_MAGIC GRUB_PE32_PE64_MAGIC
@@ -290,6 +342,40 @@ struct grub_pe_image_header
#endif
};
+struct grub_pe32_header
+{
+ /* This should be filled in with GRUB_PE32_MSDOS_STUB. */
+ grub_uint8_t msdos_stub[GRUB_PE32_MSDOS_STUB_SIZE];
+
+ /* This is always PE\0\0. */
+ char signature[GRUB_PE32_SIGNATURE_SIZE];
+
+ /* The COFF file header. */
+ struct grub_pe32_coff_header coff_header;
+
+#if GRUB_TARGET_SIZEOF_VOID_P == 8
+ /* The Optional header. */
+ struct grub_pe64_optional_header optional_header;
+#else
+ /* The Optional header. */
+ struct grub_pe32_optional_header optional_header;
+#endif
+};
+
+struct grub_pe32_header_32
+{
+ char signature[GRUB_PE32_SIGNATURE_SIZE];
+ struct grub_pe32_coff_header coff_header;
+ struct grub_pe32_optional_header optional_header;
+};
+
+struct grub_pe32_header_64
+{
+ char signature[GRUB_PE32_SIGNATURE_SIZE];
+ struct grub_pe32_coff_header coff_header;
+ struct grub_pe64_optional_header optional_header;
+};
+
struct grub_pe32_fixup_block
{
grub_uint32_t page_rva;
--
2.39.2
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