| 38 |
|
#endif |
| 39 |
|
#endif |
| 40 |
|
|
| 41 |
+ |
/* We want MAP_32BIT, if available, for SheepShaver and BasiliskII |
| 42 |
+ |
because the emulated target is 32-bit and this helps to allocate |
| 43 |
+ |
memory so that branches could be resolved more easily (32-bit |
| 44 |
+ |
displacement to code in .text), on AMD64 for example. */ |
| 45 |
+ |
#ifndef MAP_32BIT |
| 46 |
+ |
#define MAP_32BIT 0 |
| 47 |
+ |
#endif |
| 48 |
+ |
|
| 49 |
+ |
#define MAP_EXTRA_FLAGS (MAP_32BIT) |
| 50 |
+ |
|
| 51 |
|
#ifdef HAVE_MMAP_VM |
| 52 |
< |
static char * next_address = 0; |
| 52 |
> |
#if defined(__linux__) && defined(__i386__) |
| 53 |
> |
/* Force a reasonnable address below 0x80000000 on x86 so that we |
| 54 |
> |
don't get addresses above when the program is run on AMD64. |
| 55 |
> |
NOTE: this is empirically determined on Linux/x86. */ |
| 56 |
> |
#define MAP_BASE 0x10000000 |
| 57 |
> |
#else |
| 58 |
> |
#define MAP_BASE 0x00000000 |
| 59 |
> |
#endif |
| 60 |
> |
static char * next_address = (char *)MAP_BASE; |
| 61 |
|
#ifdef HAVE_MMAP_ANON |
| 62 |
< |
#define map_flags (MAP_PRIVATE | MAP_ANON) |
| 62 |
> |
#define map_flags (MAP_PRIVATE | MAP_ANON | MAP_EXTRA_FLAGS) |
| 63 |
|
#define zero_fd -1 |
| 64 |
|
#else |
| 65 |
|
#ifdef HAVE_MMAP_ANONYMOUS |
| 66 |
< |
#define map_flags (MAP_PRIVATE | MAP_ANONYMOUS) |
| 66 |
> |
#define map_flags (MAP_PRIVATE | MAP_ANONYMOUS | MAP_EXTRA_FLAGS) |
| 67 |
|
#define zero_fd -1 |
| 68 |
|
#else |
| 69 |
|
#ifdef HAVE_FCNTL_H |
| 70 |
|
#include <fcntl.h> |
| 71 |
|
#endif |
| 72 |
< |
#define map_flags (MAP_PRIVATE) |
| 72 |
> |
#define map_flags (MAP_PRIVATE | MAP_EXTRA_FLAGS) |
| 73 |
|
static int zero_fd = -1; |
| 74 |
|
#endif |
| 75 |
|
#endif |
