+/*
+ * (C) GraÅžvydas "notaz" Ignotas, 2008-2012
+ *
+ * This work is licensed under the terms of any of these licenses
+ * (at your option):
+ * - GNU GPL, version 2 or later.
+ * - GNU LGPL, version 2.1 or later.
+ * - MAME license.
+ * See the COPYING file in the top-level directory.
+ */
+
+#define _GNU_SOURCE 1
#include <stdio.h>
#include <string.h>
+#include <stdarg.h>
#include <dirent.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
+#include <sys/mman.h>
+#include <errno.h>
-#include "../common/plat.h"
+#include "../plat.h"
+
+/* XXX: maybe unhardcode pagesize? */
+#define HUGETLB_PAGESIZE (2 * 1024 * 1024)
+#define HUGETLB_THRESHOLD (HUGETLB_PAGESIZE / 2)
+#ifndef MAP_HUGETLB
+#define MAP_HUGETLB 0x40000 /* arch specific */
+#endif
int plat_is_dir(const char *path)
int plat_get_root_dir(char *dst, int len)
{
- extern char **g_argv;
- int j;
+ int j, ret;
+
+ ret = readlink("/proc/self/exe", dst, len - 1);
+ if (ret < 0) {
+ perror("readlink");
+ ret = 0;
+ }
+ dst[ret] = 0;
- strncpy(dst, g_argv[0], len);
- len -= 32; // reserve
- if (len < 0) len = 0;
- dst[len] = 0;
for (j = strlen(dst); j > 0; j--)
- if (dst[j] == '/') { dst[j+1] = 0; break; }
+ if (dst[j] == '/') {
+ dst[++j] = 0;
+ break;
+ }
- return j + 1;
+ return j;
}
#ifdef __GP2X__
return ret;
}
+void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
+{
+ static int hugetlb_disabled;
+ int prot = PROT_READ | PROT_WRITE;
+ int flags = MAP_PRIVATE | MAP_ANONYMOUS;
+ void *req, *ret;
+
+ req = (void *)addr;
+ if (need_exec)
+ prot |= PROT_EXEC;
+ if (is_fixed)
+ flags |= MAP_FIXED;
+ if (size >= HUGETLB_THRESHOLD && !hugetlb_disabled)
+ flags |= MAP_HUGETLB;
+
+ ret = mmap(req, size, prot, flags, -1, 0);
+ if (ret == MAP_FAILED && (flags & MAP_HUGETLB)) {
+ fprintf(stderr,
+ "warning: failed to do hugetlb mmap (%p, %zu): %d\n",
+ req, size, errno);
+ hugetlb_disabled = 1;
+ flags &= ~MAP_HUGETLB;
+ ret = mmap(req, size, prot, flags, -1, 0);
+ }
+ if (ret == MAP_FAILED)
+ return NULL;
+
+ if (req != NULL && ret != req)
+ fprintf(stderr,
+ "warning: mmaped to %p, requested %p\n", ret, req);
+
+ return ret;
+}
+
+void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
+{
+ void *ret;
+
+ ret = mremap(ptr, oldsize, newsize, MREMAP_MAYMOVE);
+ if (ret == MAP_FAILED)
+ return NULL;
+ if (ret != ptr)
+ printf("warning: mremap moved: %p -> %p\n", ptr, ret);
+
+ return ret;
+}
+
+void plat_munmap(void *ptr, size_t size)
+{
+ int ret;
+
+ ret = munmap(ptr, size);
+ if (ret != 0 && (size & (HUGETLB_PAGESIZE - 1))) {
+ // prehaps an autorounded hugetlb mapping?
+ size = (size + HUGETLB_PAGESIZE - 1) & ~(HUGETLB_PAGESIZE - 1);
+ ret = munmap(ptr, size);
+ }
+ if (ret != 0) {
+ fprintf(stderr,
+ "munmap(%p, %zu) failed: %d\n", ptr, size, errno);
+ }
+}
+
+/* lprintf */
+void lprintf(const char *fmt, ...)
+{
+ va_list vl;
+
+ va_start(vl, fmt);
+ vprintf(fmt, vl);
+ va_end(vl);
+}
+