sysdeps/unix/sysv/linux/sparc/brk_call.h

   1 /* Invoke the brk system call.  Sparc version.
   2    Copyright (C) 2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifdef __arch64__
  20 # define SYSCALL_NUM "0x6d"
  21 #else
  22 # define SYSCALL_NUM "0x10"
  23 #endif
  24
  25 static inline void *
  26 __brk_call (void *addr)
  27 {
  28   register long int g1 asm ("g1") = __NR_brk;
  29   register long int o0 asm ("o0") = (long int) addr;
  30   asm volatile ("ta " SYSCALL_NUM
  31                 : "=r"(o0)
  32                 : "r"(g1), "0"(o0)
  33                 : "cc");
  34   return (void *) o0;
  35 }