mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 22:22:45 +00:00
d347432a9e
When the member is initialized in the constructor body, but also has a default constructor, you pay for default construction to just throw it away. In this case a StringView is light weight to initialize, but we might as well fix all cases we find. Found by PVS-Studio: https://pvs-studio.com/en/docs/warnings/v818/
103 lines
3.9 KiB
C++
103 lines
3.9 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/String.h>
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#include <AK/Types.h>
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/* Auxiliary Vector types, from Intel386 ABI ver 1.0 section 2.3.3 */
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typedef struct
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{
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long a_type; /* Note: Extended to long from int, for ease of compatibility w/64 bit */
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union {
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long a_val;
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void* a_ptr;
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void (*a_fnc)(); /* In spec, not used */
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} a_un;
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} auxv_t;
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static_assert(sizeof(auxv_t) % sizeof(FlatPtr) == 0);
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#define AT_NULL 0 /* No length, last entry's a_type has this value */
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#define AT_IGNORE 1 /* Entry has no meaning, a_un undefined */
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#define AT_EXECFD 2 /* a_val contains a file descriptor of the main program image */
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#define AT_PHDR 3 /* a_ptr contains pointer to program header table of main program image */
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#define AT_PHENT 4 /* a_val holds size of program header table entries */
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#define AT_PHNUM 5 /* a_val holds number of program header table entries */
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#define AT_PAGESZ 6 /* a_val gives system page size in bytes */
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#define AT_BASE 7 /* a_ptr holds base address that Loader was loaded into memory */
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#define AT_FLAGS 8 /* a_val holds 1 bit flags. Undefined flags are 0 */
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#define AT_ENTRY 9 /* a_ptr holds entry point of the main program */
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#define AT_NOTELF 10 /* a_val non-zero if the program is not ELF */
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#define AT_UID 11 /* a_val holds real user id of process */
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#define AT_EUID 12 /* a_val holds effective user id of process */
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#define AT_GID 13 /* a_val holds real group id of process */
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#define AT_EGID 14 /* a_val holds effective group id of process */
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#define AT_PLATFORM 15 /* a_val points to a string containing platform name */
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#define AT_HWCAP 16 /* a_val contains bitmask of CPU features. Equivalent to CPUID 1.EDX*/
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#define AT_CLKTCK 17 /* a_val contains frequence at which times() increments. (Re: Spec. What is times()?) */
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#define AT_SECURE 23 /* a_val holds 1 if program in secure mode (e.g. suid). Otherwise 0 */
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#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) */
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#define AT_RANDOM 25 /* a_ptr points to 16 securely generated random bytes */
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#define AT_HWCAP2 26 /* a_val holds extended hw feature mask. Currently 0 */
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#define AT_EXECFN 31 /* a_ptr points to filename of executed program */
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#define AT_EXE_BASE 32 /* a_ptr holds base address where main program was loaded into memory */
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#define AT_EXE_SIZE 33 /* a_val holds the size of the main program in memory */
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namespace ELF {
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struct AuxiliaryValue {
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enum Type {
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Null = AT_NULL,
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Ignore = AT_IGNORE,
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ExecFileDescriptor = AT_EXECFD,
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Phdr = AT_PHDR,
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Phent = AT_PHENT,
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Phnum = AT_PHNUM,
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PageSize = AT_PAGESZ,
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BaseAddress = AT_BASE,
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Flags = AT_FLAGS,
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Entry = AT_ENTRY,
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NotELF = AT_NOTELF,
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Uid = AT_UID,
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EUid = AT_EUID,
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Gid = AT_GID,
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EGid = AT_EGID,
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Platform = AT_PLATFORM,
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HwCap = AT_HWCAP,
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ClockTick = AT_CLKTCK,
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Secure = AT_SECURE,
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BasePlatform = AT_BASE_PLATFORM,
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Random = AT_RANDOM,
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HwCap2 = AT_HWCAP2,
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ExecFilename = AT_EXECFN,
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ExeBaseAddress = AT_EXE_BASE,
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ExeSize = AT_EXE_SIZE
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};
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AuxiliaryValue(Type type, long val)
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{
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auxv.a_type = type;
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auxv.a_un.a_val = val;
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}
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AuxiliaryValue(Type type, void* ptr)
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{
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auxv.a_type = type;
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auxv.a_un.a_ptr = (void*)ptr;
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}
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AuxiliaryValue(Type type, StringView string)
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: optional_string(string)
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{
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auxv.a_type = type;
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auxv.a_un.a_ptr = nullptr;
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}
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auxv_t auxv {};
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StringView optional_string;
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};
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}
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