/* Solaris host-specific hook definitions.
- Copyright (C) 2004, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2007, 2008, 2010 Free Software Foundation, Inc.
This file is part of GCC.
#include "config.h"
#include "system.h"
#include "coretypes.h"
-#include <sys/mman.h>
#include "hosthooks.h"
#include "hosthooks-def.h"
+#undef HOST_HOOKS_GT_PCH_GET_ADDRESS
+#define HOST_HOOKS_GT_PCH_GET_ADDRESS sol_gt_pch_get_address
#undef HOST_HOOKS_GT_PCH_USE_ADDRESS
#define HOST_HOOKS_GT_PCH_USE_ADDRESS sol_gt_pch_use_address
-/* Map SIZE bytes of FD+OFFSET at BASE. Return 1 if we succeeded at
- mapping the data at BASE, -1 if we couldn't. */
+/* Before Solaris 11, the mmap ADDR parameter is mostly ignored without
+ MAP_FIXED set. Before we give up, search the desired address space with
+ mincore to see if the space is really free. */
-static int
-sol_gt_pch_use_address (void *base, size_t size, int fd, size_t offset)
+static void *
+mmap_fixed (void *addr, size_t len, int prot, int flags, int fd, off_t off)
{
- void *addr;
-
- /* We're called with size == 0 if we're not planning to load a PCH
- file at all. This allows the hook to free any static space that
- we might have allocated at link time. */
- if (size == 0)
- return -1;
-
- addr = mmap ((caddr_t) base, size, PROT_READ | PROT_WRITE, MAP_PRIVATE,
- fd, offset);
+ void *base;
- /* Solaris isn't good about honoring the mmap START parameter
- without MAP_FIXED set. Before we give up, search the desired
- address space with mincore to see if the space is really free. */
- if (addr != base)
+ base = mmap ((caddr_t) addr, len, prot, flags, fd, off);
+
+ if (base != addr)
{
size_t page_size = getpagesize();
char one_byte;
size_t i;
- if (addr != (void *) MAP_FAILED)
- munmap ((caddr_t) addr, size);
+ if (base != (void *) MAP_FAILED)
+ munmap ((caddr_t) base, len);
errno = 0;
- for (i = 0; i < size; i += page_size)
- if (mincore ((char *)base + i, page_size, (char *) &one_byte) == -1
+ for (i = 0; i < len; i += page_size)
+ if (mincore ((char *)addr + i, page_size, (char *) &one_byte) == -1
&& errno == ENOMEM)
continue; /* The page is not mapped. */
else
break;
- if (i >= size)
- addr = mmap ((caddr_t) base, size,
- PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED,
- fd, offset);
+ if (i >= len)
+ base = mmap ((caddr_t) addr, len, prot, flags | MAP_FIXED, fd, off);
}
+ return base;
+}
+
+/* For various ports, try to guess a fixed spot in the vm space
+ that's probably free. Based on McDougall, Mauro, Solaris Internals, 2nd
+ ed., p.460-461, fig. 9-3, 9-4, 9-5. */
+#if defined(__sparcv9__)
+/* This low to avoid VA hole on UltraSPARC I/II. */
+# define TRY_EMPTY_VM_SPACE 0x70000000000
+#elif defined(__sparc__)
+# define TRY_EMPTY_VM_SPACE 0x80000000
+#elif defined(__x86_64__)
+# define TRY_EMPTY_VM_SPACE 0x80000000000
+#elif defined(__i386__)
+# define TRY_EMPTY_VM_SPACE 0xB0000000
+#else
+# define TRY_EMPTY_VM_SPACE 0
+#endif
+
+/* Determine a location where we might be able to reliably allocate
+ SIZE bytes. FD is the PCH file, though we should return with the
+ file unmapped. */
+
+static void *
+sol_gt_pch_get_address (size_t size, int fd)
+{
+ void *addr;
+
+ addr = mmap_fixed ((caddr_t) TRY_EMPTY_VM_SPACE, size,
+ PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
+
+ /* If we failed the map, that means there's *no* free space. */
+ if (addr == (void *) MAP_FAILED)
+ return NULL;
+ /* Unmap the area before returning. */
+ munmap ((caddr_t) addr, size);
+
+ return addr;
+}
+
+/* Map SIZE bytes of FD+OFFSET at BASE. Return 1 if we succeeded at
+ mapping the data at BASE, -1 if we couldn't. */
+
+static int
+sol_gt_pch_use_address (void *base, size_t size, int fd, size_t offset)
+{
+ void *addr;
+
+ /* We're called with size == 0 if we're not planning to load a PCH
+ file at all. This allows the hook to free any static space that
+ we might have allocated at link time. */
+ if (size == 0)
+ return -1;
+
+ addr = mmap_fixed ((caddr_t) base, size,
+ PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, offset);
+
return addr == base ? 1 : -1;
}
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