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[Support/ELF] - Added few constants and structs relative to compressed sections.

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Patch adds few constants and structs to support compressed sections.

SHF_COMPRESSED intersects with platform specific XCORE_SHF_CP_SECTION,
both has value of 0x800U.

Reference link:
http://www.sco.com/developers/gabi/latest/ch4.sheader.html

Differential revision: http://reviews.llvm.org/D20209

llvm-svn: 269404
This commit is contained in:
George Rimar 2016-05-13 10:20:12 +00:00
parent 7e8c12d210
commit 4712827d36
1 changed files with 27 additions and 0 deletions
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27
include/llvm/Support/ELF.h
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@ -740,6 +740,9 @@ enum : unsigned {
// This section holds Thread-Local Storage.
SHF_TLS = 0x400U,
// Identifies a section containing compressed data.
SHF_COMPRESSED = 0x800U,
// This section is excluded from the final executable or shared library.
SHF_EXCLUDE = 0x80000000U,
@ -1315,6 +1318,30 @@ enum {
NT_GNU_BUILD_ID = 3
};
// Compressed section header for ELF32.
struct Elf32_Chdr {
Elf32_Word ch_type;
Elf32_Word ch_size;
Elf32_Word ch_addralign;
};
// Compressed section header for ELF64.
struct Elf64_Chdr {
Elf64_Word ch_type;
Elf64_Word ch_reserved;
Elf64_Xword ch_size;
Elf64_Xword ch_addralign;
};
// Legal values for ch_type field of compressed section header.
enum {
ELFCOMPRESS_ZLIB = 1, // ZLIB/DEFLATE algorithm.
ELFCOMPRESS_LOOS = 0x60000000, // Start of OS-specific.
ELFCOMPRESS_HIOS = 0x6fffffff, // End of OS-specific.
ELFCOMPRESS_LOPROC = 0x70000000, // Start of processor-specific.
ELFCOMPRESS_HIPROC = 0x7fffffff // End of processor-specific.
};
} // end namespace ELF
} // end namespace llvm