diff options
Diffstat (limited to 'libc/sysdeps/linux/metag/brk.c')
-rw-r--r-- | libc/sysdeps/linux/metag/brk.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/metag/brk.c b/libc/sysdeps/linux/metag/brk.c new file mode 100644 index 000000000..355e88fc7 --- /dev/null +++ b/libc/sysdeps/linux/metag/brk.c @@ -0,0 +1,38 @@ +/* + * Copyright (C) 2013 Imagination Technologies Ltd. + * + * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + */ + +#include <errno.h> +#include <unistd.h> +#include <sys/syscall.h> + +libc_hidden_proto(brk) + +/* This must be initialized data because commons can't have aliases. */ +void * __curbrk attribute_hidden = 0; + +int brk (void *addr) +{ + void *newbrk; + + __asm__ __volatile__ ("MOV D1Re0,%2\n\t" + "MOV D1Ar1,%1\n\t" + "SWITCH #0x440001\n\t" + "MOV %0,D0Re0" + : "=r" (newbrk) + : "r" (addr), "K" (__NR_brk) + : "D0Re0", "D1Re0", "D1Ar1"); + + __curbrk = newbrk; + + if (newbrk < addr) + { + __set_errno (ENOMEM); + return -1; + } + + return 0; +} +libc_hidden_def(brk) |