X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=linux%2Fplat.c;h=2842691e5e22d2e65be373eb10a26b27942ea8ea;hb=39b2c61e1d4ef370b0f84cb5a601f9f2d3a1d35a;hp=c34beeaa355a43e51b334ce72c7cf07a483d8f96;hpb=6282e17ef5f37915df1a77b5d7138c666e94d0fb;p=libpicofe.git

diff --git a/linux/plat.c b/linux/plat.c
index c34beea..2842691 100644
--- a/linux/plat.c
+++ b/linux/plat.c
@@ -19,6 +19,7 @@
 #include <unistd.h>
 #include <sys/mman.h>
 #include <errno.h>
+#include <sys/stat.h>
 
 #include "../plat.h"
 
@@ -40,24 +41,56 @@ int plat_is_dir(const char *path)
 	return 0;
 }
 
-int plat_get_root_dir(char *dst, int len)
+static int plat_get_data_dir(char *dst, int len)
 {
-	int j, ret;
-
-	ret = readlink("/proc/self/exe", dst, len - 1);
+#ifdef PICO_DATA_DIR
+	memcpy(dst, PICO_DATA_DIR, sizeof PICO_DATA_DIR);
+	return sizeof(PICO_DATA_DIR) - 1;
+#else
+	int j, ret = readlink("/proc/self/exe", dst, len - 1);
 	if (ret < 0) {
 		perror("readlink");
 		ret = 0;
 	}
 	dst[ret] = 0;
 
-	for (j = strlen(dst); j > 0; j--)
+	for (j = ret - 1; j > 0; j--)
 		if (dst[j] == '/') {
 			dst[++j] = 0;
 			break;
 		}
-
 	return j;
+#endif
+}
+
+int plat_get_skin_dir(char *dst, int len)
+{
+	int ret = plat_get_data_dir(dst, len);
+	if (ret < 0)
+		return ret;
+
+	memcpy(dst + ret, "skin/", sizeof "skin/");
+	return ret + sizeof("skin/") - 1;
+}
+
+#ifndef PICO_HOME_DIR
+#define PICO_HOME_DIR "/.picodrive/"
+#endif
+int plat_get_root_dir(char *dst, int len)
+{
+#if !defined(__GP2X__) && !defined(PANDORA)
+	const char *home = getenv("HOME");
+	int ret;
+
+	if (home != NULL) {
+		ret = snprintf(dst, len, "%s%s", home, PICO_HOME_DIR);
+		if (ret >= len)
+			ret = len - 1;
+		mkdir(dst, 0755);
+		return ret;
+	}
+#endif
+	return plat_get_data_dir(dst, len);
 }
 
 #ifdef __GP2X__
@@ -145,8 +178,10 @@ void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
 	req = (void *)addr;
 	if (need_exec)
 		prot |= PROT_EXEC;
+	/* avoid MAP_FIXED, it overrides existing mappings..
 	if (is_fixed)
 		flags |= MAP_FIXED;
+	*/
 	if (size >= HUGETLB_THRESHOLD)
 		flags |= MAP_HUGETLB;
 
@@ -164,9 +199,14 @@ void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
 	if (ret == MAP_FAILED)
 		return NULL;
 
-	if (req != NULL && ret != req)
-		fprintf(stderr,
-			"warning: mmaped to %p, requested %p\n", ret, req);
+	if (req != NULL && ret != req) {
+		fprintf(stderr, "%s: mmaped to %p, requested %p\n",
+			is_fixed ? "error" : "warning", ret, req);
+		if (is_fixed) {
+			munmap(ret, size);
+			return NULL;
+		}
+	}
 
 	return ret;
 }
@@ -176,8 +216,18 @@ 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 == MAP_FAILED) {
+		fprintf(stderr, "mremap %p %zd %zd: ",
+			ptr, oldsize, newsize);
+		perror(NULL);
+		// might be because huge pages can't be remapped,
+		// just make a new mapping
+		ret = plat_mmap(0, newsize, 0, 0);
+		if (ret == MAP_FAILED)
+			return NULL;
+		memcpy(ret, ptr, oldsize);
+		munmap(ptr, oldsize);
+	}
 	if (ret != ptr)
 		printf("warning: mremap moved: %p -> %p\n", ptr, ret);