From 2e9500a6c94ccbabda48c7157d92541da0dbc442 Mon Sep 17 00:00:00 2001 From: David McCullough Date: Wed, 5 Feb 2003 12:50:23 +0000 Subject: add brk for m68k NOTE: on uClinux-2.[45] kernels, brk works but is limited to slack space in the memory allocated to the process. --- libc/sysdeps/linux/m68k/brk.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 libc/sysdeps/linux/m68k/brk.c (limited to 'libc/sysdeps/linux/m68k/brk.c') diff --git a/libc/sysdeps/linux/m68k/brk.c b/libc/sysdeps/linux/m68k/brk.c new file mode 100644 index 000000000..1fe1090d3 --- /dev/null +++ b/libc/sysdeps/linux/m68k/brk.c @@ -0,0 +1,30 @@ +/* consider this code LGPL - davidm */ + +#include +#include +#include + +/* This must be initialized data because commons can't have aliases. */ +void * ___brk_addr = 0; + +int brk (void *addr) +{ + void *newbrk; + + __asm__ volatile ("movel %2,%/d1\n\t" + "moveq %1,%/d0\n\t" + "trap #0\n\t" + "movel %/d0,%0" + :"=g" (newbrk) + :"i" (__NR_brk),"g" (addr) : "%d0", "%d1"); + + ___brk_addr = newbrk; + + if (newbrk < addr) + { + __set_errno (ENOMEM); + return -1; + } + + return 0; +} -- cgit v1.2.3