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/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/String.h>
#include <AK/Types.h>
/* Auxiliary Vector types, from Intel386 ABI ver 1.0 section 2.3.3 */
typedef struct
{
long a_type; /* Note: Extended to long from int, for ease of compatibility w/64 bit */
union {
long a_val;
void* a_ptr;
void (*a_fnc)(); /* In spec, not used */
} a_un;
} auxv_t;
static_assert(sizeof(auxv_t) % sizeof(FlatPtr) == 0);
#define AT_NULL 0 /* No length, last entry's a_type has this value */
#define AT_IGNORE 1 /* Entry has no meaning, a_un undefined */
#define AT_EXECFD 2 /* a_val contains a file descriptor of the main program image */
#define AT_PHDR 3 /* a_ptr contains pointer to program header table of main program image */
#define AT_PHENT 4 /* a_val holds size of program header table entries */
#define AT_PHNUM 5 /* a_val holds number of program header table entries */
#define AT_PAGESZ 6 /* a_val gives system page size in bytes */
#define AT_BASE 7 /* a_ptr holds base address that Loader was loaded into memory */
#define AT_FLAGS 8 /* a_val holds 1 bit flags. Undefined flags are 0 */
#define AT_ENTRY 9 /* a_ptr holds entry point of the main program */
#define AT_NOTELF 10 /* a_val non-zero if the program is not ELF */
#define AT_UID 11 /* a_val holds real user id of process */
#define AT_EUID 12 /* a_val holds effective user id of process */
#define AT_GID 13 /* a_val holds real group id of process */
#define AT_EGID 14 /* a_val holds effective group id of process */
#define AT_PLATFORM 15 /* a_val points to a string containing platform name */
#define AT_HWCAP 16 /* a_val contains bitmask of CPU features. Equivalent to CPUID 1.EDX*/
#define AT_CLKTCK 17 /* a_val contains frequence at which times() increments. (Re: Spec. What is times()?) */
#define AT_SECURE 23 /* a_val holds 1 if program in secure mode (e.g. suid). Otherwise 0 */
#define AT_BASE_PLATFORM 24 /* a_ptr points to a string identifying base platform name, which might be different from platform (e.g x86_64 when in i386 compat) */
#define AT_RANDOM 25 /* a_ptr points to 16 securely generated random bytes */
#define AT_HWCAP2 26 /* a_val holds extended hw feature mask. Currently 0 */
#define AT_EXECFN 31 /* a_ptr points to filename of executed program */
#define AT_EXE_BASE 32 /* a_ptr holds base address where main program was loaded into memory */
#define AT_EXE_SIZE 33 /* a_val holds the size of the main program in memory */
namespace ELF {
struct AuxiliaryValue {
enum Type {
Null = AT_NULL,
Ignore = AT_IGNORE,
ExecFileDescriptor = AT_EXECFD,
Phdr = AT_PHDR,
Phent = AT_PHENT,
Phnum = AT_PHNUM,
PageSize = AT_PAGESZ,
BaseAddress = AT_BASE,
Flags = AT_FLAGS,
Entry = AT_ENTRY,
NotELF = AT_NOTELF,
Uid = AT_UID,
EUid = AT_EUID,
Gid = AT_GID,
EGid = AT_EGID,
Platform = AT_PLATFORM,
HwCap = AT_HWCAP,
ClockTick = AT_CLKTCK,
Secure = AT_SECURE,
BasePlatform = AT_BASE_PLATFORM,
Random = AT_RANDOM,
HwCap2 = AT_HWCAP2,
ExecFilename = AT_EXECFN,
ExeBaseAddress = AT_EXE_BASE,
ExeSize = AT_EXE_SIZE
};
AuxiliaryValue(Type type, long val)
{
auxv.a_type = type;
auxv.a_un.a_val = val;
}
AuxiliaryValue(Type type, void* ptr)
{
auxv.a_type = type;
auxv.a_un.a_ptr = (void*)ptr;
}
AuxiliaryValue(Type type, String string)
{
auxv.a_type = type;
auxv.a_un.a_ptr = nullptr;
optional_string = string;
}
auxv_t auxv {};
String optional_string;
};
}
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