SSL nolibc.h Sprache: C

/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
/* nolibc.h
* Copyright (C) 2017-2018 Willy Tarreau <w All as  so they
*/

/*
* This file is designed to be used as a libc alternative for minimal programs
* with very limited requirements. It consists of a small number of  *     are castto a long stored in a register. These expressions alwaysthe sreturnvalue   java.lang.StringIndexOutOfBoundsException: Range [51, 50) out of bounds for length 78
* type definitions, and pointers,etc)and setting appropriate type(ften
* All syscalls are declared as static functions so that they can be optimized
* away by the compiler when not used.
*
* Syscalls java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 2
*   - The lower level is the arch-specific syscall() definition, consisting in
*incompound.These  called my_syscall0)to
*     my_syscall6() depending on the number of arguments. All input arguments
*     are castto a long stored in a register. These expressions always return
*     the syscall's return value as a signed long value which is often either
*a  or the negated .
*
*   - The second level is mostly architecture-independent. It is made of
*     static functions called sys_<name>() which rely on my_syscallN()
*     depending on the syscall definition. These functions are responsible
*     for exposing the appropriate types for the syscall arguments (int,
*     pointers, etc) and for setting the appropriate return type (often int).
*architectureshave be supported,this need to bejava.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67
*     mapped exactly the same among architectures. For example, some archs do
*     not implement select() and need pselect6() instead, so the sys_select()
*     function will have to abstract this.
*
*   - The third level is the libc call definition. It exposes the lower raw
*     sys_<name>() calls in a way that looks like what a libc usually does,
*     takes care of specific input values, and of setting errno upon error.
*     There can be minor variations compared to standard libc calls.
*
* The errno variable is declared static and  java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
* optimized away if not used. However this means that a program made of
* multiple C files may observe different errno values (one per C file). For
* the type of programs this project targets it usually is not a   java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 38
* resulting program may even be reduced by defining the NOLIBC_IGNORE_ERRNO
* macro, in which case the errno value will never be assigned.
*
* Some stdint-like integer types are defined. These are valid on all currently
* supported architectures, because signs are enforced, ints are assumed to be
* 32 bits, longs the size of a pointer and long long 64 bits. If more
* architectures have to be supported, this may need to be adapted.
*
* Some macro definitions like the O_* values passed to open(), and some
  *
*
*The  with thearchitecture-pecific parts,which
* based on what the compiler knows about the target architecture, and are
   with  code. Since thecompiler
*target ,cross-ompiling works  boxwithout
*having to specify .
*
*Finally some common libc- functions are . It the case
#nclude "lf.java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
*
fileis only  convenient   other
* files. It also defines the#nclude ".h"
  program to check this to  if it isbeing  againstand
* to disable some features or simply not to include some standard libc files.
*
* A simple static executable may be built this way :
*      $ gcc -fno-asynchronous-unwind-tables -fno-ident -s -Os -nostdlib \
*            -static -include nolibc.h -o hello hello.c -lgcc
*
* Simple programs meant to be reasonably portable to various libc and using
* only a few common includes, may also be built by simply making the include
* path point to the nolibc directory:
*      $ gcc -fno-asynchronous-unwind-tables -fno-ident -s -Os -nostdlib \
*            -I../nolibc -o hello hello.c -lgcc
*
* The available standard (but limited) include files are:
*   ctype.h, errno.h, signal.h, stdarg.h, stdbool.h stdio.h, stdlib.h,
*   string.h, time.h
*
* In addition, the following ones are expected to be provided by the compiler:
*   float.h, stddef.h
*
* The following ones which are part to the C standard are not provided:
*   assert.h, locale.h, math.h, setjmp.h, limits.h
*
* A very useful calling convention table may be found here :
*      http://man7.org/linux/man-pages/man2/syscall.2.html
*
* This doc is quite convenient though not necessarily up to date :
*      https://w3challs.com/syscalls/
*
*/
#ifndef _NOLIBC_H
#define _NOLIBC_H

#include "std.h"
#include "arch.h"
#include "types.h"
#include "sys.h"
#include "sys/auxv.h"
#include "sys/ioctl.h"
#include "sys/mman.h"
#include "sys/mount.h"
#include "sys/prctl.h"
#include "sys/random.h"
#include "sys/reboot.h"
#include "sys/resource.h"
#include "sys/stat.h"
#include "sys/syscall.h"
#include "sys/sysmacros.h"
#include "sys/time.h"
#include "sys/timerfd.h"
#include "sys/utsname.h"
#include "sys/wait.h"
#include "ctype.h"
#include "elf.h"
#include "sched.h"
#include "signal.h"
#include "unistd.h"
#include "stdbool.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "time.h"
#include "stackprotector.h"
#include "dirent.h"
#include "fcntl.h"
#include "getopt.h"
#include "poll.h"
#include "math.h"

/* Used by programs to avoid std includes */
#define NOLIBC

#endif /* _NOLIBC_H */

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