commit 31551552a14960196c6b540fa9e842f9dc5ed993
parent 3fea8a77c9a899664dd92a6a84bb0c3a307da1e7
Author: Mykyta Holubakha <hilobakho@gmail.com>
Date: Thu, 18 Mar 2021 15:37:56 +0200
format::elf: add definitions for auxv/vDSO parsing
Added missing values for stt and dt enums
Added auxillary vector and version definiton struct types
Diffstat:
| M | format/elf/types.ha | | | 168 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 168 insertions(+), 0 deletions(-)
diff --git a/format/elf/types.ha b/format/elf/types.ha
@@ -240,6 +240,8 @@ export type stt = enum u8 {
SECTION = 3,
// Source file associated with the object
FILE = 4,
+ // Symbol is a common data object
+ COMMON = 5,
// Environment-specific use
LOOS = 10,
// Environment-specific use
@@ -437,6 +439,20 @@ export type dt = enum i64 {
FINI_ARRAYSZ = 28,
// Reserved for environment-specific use.
LOOS = 0x60000000,
+
+ // Symbol versioning entry types, GNU extension
+ // Version table records
+ // .gnu.version section address
+ VERSYM = 0x6FFFFFF0,
+ // .gnu.version_d section address
+ VERDEF = 0x6FFFFFFC,
+ // Number of version definitions
+ VERDEFNUM = 0x6FFFFFFD,
+ // .gnu.version_r section address
+ VERNEED = 0x6FFFFFFE,
+ // Number of needed versions
+ VERNEEDNUM = 0x6FFFFFFF,
+
// Reserved for environment-specific use.
HIOS = 0x6FFFFFFF,
// Reserved for processor-specific use.
@@ -444,3 +460,155 @@ export type dt = enum i64 {
// Reserved for processor-specific use.
HIPROC = 0x7FFFFFFF,
};
+
+// Auxillary vector
+export type auxv64 = struct {
+ a_type: u64, // Entry type
+ union {
+ a_val: u64, // Integer value
+ }
+};
+
+// Legal auxillary vector entry types
+export type at = enum u32 {
+ // End of vector
+ NULL = 0,
+ // Entry should be ignored
+ IGNORE = 1,
+ // File descriptor of program
+ EXECFD = 2,
+ // Program headers for program
+ PHDR = 3,
+ // Size of program header entry
+ PHENT = 4,
+ // Number of program headers
+ PHNUM = 5,
+ // System page size
+ PAGESZ = 6,
+ // Base address of interpreter
+ BASE = 7,
+ // Flags
+ FLAGS = 8,
+ // Entry point of program
+ ENTRY = 9,
+ // Program is not ELF
+ NOTELF = 10,
+ // Real uid
+ UID = 11,
+ // Effective uid
+ EUID = 12,
+ // Real gid
+ GID = 13,
+ // Effective gid
+ EGID = 14,
+ // Frequency of times()
+ CLKTCK = 17,
+
+ // String identifying platform.
+ PLATFORM = 15,
+ // Machine-dependent hints about processor capabilities.
+ HWCAP = 16,
+
+ // Used FPU control word.
+ FPUCW = 18,
+
+ // Data cache block size.
+ DCACHEBSIZE = 19,
+ // Instruction cache block size.
+ ICACHEBSIZE = 20,
+ // Unified cache block size.
+ UCACHEBSIZE = 21,
+
+ // A special ignored value for PPC, used by the kernel to control the
+ // interpretation of the AUXV. Must be > 16.
+ // Entry should be ignored.
+ IGNOREPPC = 22,
+ // Boolean, was exec setuid-like?
+ SECURE = 23,
+ // String identifying real platforms.
+ BASE_PLATFORM = 24,
+ // Address of 16 random bytes.
+ RANDOM = 25,
+ // More machine-dependent hints about processor capabilities.
+ HWCAP2 = 26,
+ // Filename of executable.
+ EXECFN = 31,
+
+ // Pointer to the global system page used for system calls and other
+ // nice things.
+ SYSINFO = 32,
+ SYSINFO_EHDR = 33,
+
+ // Shapes of the caches. Bits 0-3 contains associativity, bits 4-7 contains
+ // log2 of line size, mask those to get cache size.
+ L1I_CACHESHAPE = 34,
+ L1D_CACHESHAPE = 35,
+ L2_CACHESHAPE = 36,
+ L3_CACHESHAPE = 37,
+
+ // Shapes of the caches, with more room to describe them.
+ // *GEOMETRY are comprised of cache line size in bytes in the bottom 16 bits
+ // and the cache associativity in the next 16 bits.
+ L1I_CACHESIZE = 40,
+ L1I_CACHEGEOMETRY = 41,
+ L1D_CACHESIZE = 42,
+ L1D_CACHEGEOMETRY = 43,
+ L2_CACHESIZE = 44,
+ L2_CACHEGEOMETRY = 45,
+ L3_CACHESIZE = 46,
+ L3_CACHEGEOMETRY = 47,
+
+ // Stack needed for signal delivery (AArch64).
+ MINSIGSTKSZ = 51,
+};
+
+// Version definition section
+export type verdef64 = struct {
+ // Version revision
+ vd_version: u16,
+ // Version information
+ vd_flags: u16,
+ // Version Index
+ vd_ndx: u16,
+ // Number of associated aux entries
+ vd_cnt: u16,
+ // Version name hash value
+ vd_hash: u32,
+ // Offset in bytes to verdaux array
+ vd_aux: u32,
+ // Offset in bytes to next verdef entry
+ vd_next: u32,
+};
+
+// Auxillary version information
+export type verdaux64 = struct {
+ vda_name: u32,
+ vda_next: u32,
+};
+
+// Version revision values
+export type ver_def = enum u16 {
+ NONE = 0,
+ CURRENT = 1,
+ NUM = 2,
+};
+
+// Version information flags
+export type ver_flg = enum u16 {
+ BASE = 0x1,
+ WEAK = 0x2,
+};
+
+// Versym index values
+export type ver_ndx = enum u16 {
+ LOCAL = 0,
+ GLOBAL = 1,
+ LORESERVE = 0xff00,
+ ELIMINATE = 0xff01,
+};
+
+// DT_HASH section header
+export type hashhdr = struct {
+ nbucket: u32,
+ nchain: u32,
+};
