diff options
Diffstat (limited to 'libc/sysdeps/linux/powerpc/mmap.c')
| -rw-r--r-- | libc/sysdeps/linux/powerpc/mmap.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/powerpc/mmap.c b/libc/sysdeps/linux/powerpc/mmap.c new file mode 100644 index 000000000..ec4bfd1f9 --- /dev/null +++ b/libc/sysdeps/linux/powerpc/mmap.c @@ -0,0 +1,48 @@ + +#include <unistd.h> +#include <sys/mman.h> +#include <errno.h> +#include <sys/syscall.h> + +#define __syscall_clobbers \ + "r9", "r10", "r11", "r12" +#define __syscall_return(type) \ + return (__sc_err & 0x10000000 ? errno = __sc_ret, __sc_ret = -1 : 0), \ + (type) __sc_ret + +void * mmap(void *start, size_t length, int prot, int flags, int fd, + off_t offset) +{ + unsigned long __sc_ret, __sc_err; + register unsigned long __sc_0 __asm__ ("r0"); + register unsigned long __sc_3 __asm__ ("r3"); + register unsigned long __sc_4 __asm__ ("r4"); + register unsigned long __sc_5 __asm__ ("r5"); + register unsigned long __sc_6 __asm__ ("r6"); + register unsigned long __sc_7 __asm__ ("r7"); + register unsigned long __sc_8 __asm__ ("r8"); + + __sc_3 = (unsigned long) start; + __sc_4 = (unsigned long) length; + __sc_5 = (unsigned long) prot; + __sc_6 = (unsigned long) flags; + __sc_7 = (unsigned long) fd; + __sc_8 = (unsigned long) offset; + __sc_0 = __NR_mmap; + __asm__ __volatile__ + ("sc \n\t" + "mfcr %1 " + : "=&r" (__sc_3), "=&r" (__sc_0) + : "0" (__sc_3), "1" (__sc_0), + "r" (__sc_4), + "r" (__sc_5), + "r" (__sc_6), + "r" (__sc_7), + "r" (__sc_8) + : __syscall_clobbers); + __sc_ret = __sc_3; + __sc_err = __sc_0; + + __syscall_return (void *); +} + |