diff options
| -rw-r--r-- | libc/sysdeps/linux/m68k/Makefile | 2 | ||||
| -rw-r--r-- | libc/sysdeps/linux/m68k/brk.c | 30 |
2 files changed, 31 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/m68k/Makefile b/libc/sysdeps/linux/m68k/Makefile index 36970c6df..a98352198 100644 --- a/libc/sysdeps/linux/m68k/Makefile +++ b/libc/sysdeps/linux/m68k/Makefile @@ -33,7 +33,7 @@ CRT0_OBJ = crt0.o crt1.o SSRC= __longjmp.S bsd-_setjmp.S bsd-setjmp.S clone.S setjmp.S vfork.S SOBJS=$(patsubst %.S,%.o, $(SSRC)) -CSRC=ptrace.c +CSRC=ptrace.c brk.c COBJS=$(patsubst %.c,%.o, $(CSRC)) OBJS=$(SOBJS) $(MOBJ) $(COBJS) 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 <unistd.h> +#include <sys/syscall.h> +#include <errno.h> + +/* 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; +} |