void
runtime·mallocinit ( void )
{
byte *p;
uintptr arena_size , bitmap_size;
extern byte end[];
byte *want;
uintptr limit;
#line 2311 "C:\Go\src\pkg\runtime\malloc.goc"
p = nil;
arena_size = 0;
bitmap_size = 0;
#line 2316 "C:\Go\src\pkg\runtime\malloc.goc"
USED ( p ) ;
USED ( arena_size ) ;
USED ( bitmap_size ) ;
#line 2320 "C:\Go\src\pkg\runtime\malloc.goc"
runtime·InitSizes ( ) ;
#line 2322 "C:\Go\src\pkg\runtime\malloc.goc"
limit = runtime·memlimit ( ) ;
#line 2327 "C:\Go\src\pkg\runtime\malloc.goc"
if ( sizeof ( void* ) == 8 && ( limit == 0 || limit > ( 1<<30 ) ) ) {
#line 2352 "C:\Go\src\pkg\runtime\malloc.goc"
arena_size = 16LL<<30;
bitmap_size = arena_size / ( sizeof ( void* ) *8/4 ) ;
p = runtime·SysReserve ( ( void* ) ( 0x00f8ULL<<32 ) , bitmap_size + arena_size ) ;
}
if ( p == nil ) {
#line 2374 "C:\Go\src\pkg\runtime\malloc.goc"
bitmap_size = MaxArena32 / ( sizeof ( void* ) *8/4 ) ;
arena_size = 512<<20;
if ( limit > 0 && arena_size+bitmap_size > limit ) {
bitmap_size = ( limit / 9 ) & ~ ( ( 1<<PageShift ) - 1 ) ;
arena_size = bitmap_size * 8;
}
#line 2390 "C:\Go\src\pkg\runtime\malloc.goc"
want = ( byte* ) ( ( ( uintptr ) end + ( 1<<18 ) + ( 1<<20 ) - 1 ) &~ ( ( 1<<20 ) -1 ) ) ;
p = runtime·SysReserve ( want , bitmap_size + arena_size ) ;
if ( p == nil )
runtime·throw ( "runtime: cannot reserve arena virtual address space" ) ;
if ( ( uintptr ) p & ( ( ( uintptr ) 1<<PageShift ) -1 ) )
runtime·printf ( "runtime: SysReserve returned unaligned address %p; asked for %p" , p , bitmap_size+arena_size ) ;
}
if ( ( uintptr ) p & ( ( ( uintptr ) 1<<PageShift ) -1 ) )
runtime·throw ( "runtime: SysReserve returned unaligned address" ) ;
#line 2400 "C:\Go\src\pkg\runtime\malloc.goc"
runtime·mheap.bitmap = p;
runtime·mheap.arena_start = p + bitmap_size;
runtime·mheap.arena_used = runtime·mheap.arena_start;
runtime·mheap.arena_end = runtime·mheap.arena_start + arena_size;
#line 2406 "C:\Go\src\pkg\runtime\malloc.goc"
runtime·MHeap_Init ( &runtime·mheap , runtime·SysAlloc ) ;
m->mcache = runtime·allocmcache ( ) ;
#line 2410 "C:\Go\src\pkg\runtime\malloc.goc"
runtime·free ( runtime·malloc ( 1 ) ) ;
}
int main(int argc, char *argv[])
{
const char *map;
int memfd;
size_t fbm;
const char *ptr, *end;
size_t page = get_page_size();
size_t mapbase, maplen;
int err = 1;
(void)argc;
mapbase = memlimit() & ~(page - 1);
if (!mapbase)
return 2;
memfd = open("/dev/mem", O_RDONLY);
if (memfd < 0) {
fprintf(stderr, "%s: cannot open /dev/mem: %s\n",
argv[0], strerror(errno));
return 2;
}
map = mmap(NULL, page, PROT_READ, MAP_SHARED, memfd, 0);
if (map == MAP_FAILED) {
fprintf(stderr, "%s: cannot map page 0: %s\n",
argv[0], strerror(errno));
return 2;
}
fbm = *(uint16_t *)(map + 0x413) << 10;
if (fbm < mapbase)
fbm = mapbase;
munmap((void *)map, page);
if (fbm < 64*1024 || fbm >= 640*1024)
return 1;
maplen = 0xa0000 - mapbase;
map = mmap(NULL, maplen, PROT_READ, MAP_SHARED, memfd, mapbase);
if (map == MAP_FAILED) {
fprintf(stderr, "%s: cannot map base memory: %s\n",
argv[0], strerror(errno));
return 2;
}
ptr = map + (fbm - mapbase);
end = map + (0xa0000 - mapbase);
while (ptr < end) {
if (valid_mbft((const struct mBFT *)ptr, end-ptr)) {
output_params((const struct mBFT *)ptr);
err = 0;
break;
}
ptr += 16;
}
munmap((void *)map, maplen);
return err;
}
