tools/include/nolibc/arch.h

   1 /* SPDX-License-Identifier: LGPL-2.1 OR MIT */
   2 /*
   3  * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
   4  */
   5
   6 /* Below comes the architecture-specific code. For each architecture, we have
   7  * the syscall declarations and the _start code definition. This is the only
   8  * global part. On all architectures the kernel puts everything in the stack
   9  * before jumping to _start just above us, without any return address (_start
  10  * is not a function but an entry point). So at the stack pointer we find argc.
  11  * Then argv[] begins, and ends at the first NULL. Then we have envp which
  12  * starts and ends with a NULL as well. So envp=argv+argc+1.
  13  */
  14
  15 #ifndef _NOLIBC_ARCH_H
  16 #define _NOLIBC_ARCH_H
  17
  18 #if defined(__x86_64__)
  19 #include "arch-x86_64.h"
  20 #elif defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)
  21 #include "arch-i386.h"
  22 #elif defined(__ARM_EABI__)
  23 #include "arch-arm.h"
  24 #elif defined(__aarch64__)
  25 #include "arch-aarch64.h"
  26 #elif defined(__mips__)
  27 #include "arch-mips.h"
  28 #elif defined(__powerpc__)
  29 #include "arch-powerpc.h"
  30 #elif defined(__riscv)
  31 #include "arch-riscv.h"
  32 #elif defined(__s390x__)
  33 #include "arch-s390.h"
  34 #elif defined(__loongarch__)
  35 #include "arch-loongarch.h"
  36 #else
  37 #error Unsupported Architecture
  38 #endif
  39
  40 #endif /* _NOLIBC_ARCH_H */