/*
- * assembly.c: Routines for manipulating and assembly stored in an
- * extended PE/COFF file.
+ * assembly.c: Routines for loading assemblies.
*
* Author:
* Miguel de Icaza (miguel@ximian.com)
* (C) 2001 Ximian, Inc. http://www.ximian.com
*
* TODO:
- * Do byteswaps for big-endian systems on the various headers.
+ * Implement big-endian versions of the reading routines.
*/
#include <config.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include "assembly.h"
+#include "image.h"
#include "cil-coff.h"
#include "rawbuffer.h"
-#define INVALID_ADDRESS 0xffffffff
+#define CSIZE(x) (sizeof (x) / 4)
-/* FIXME: implement big endian versions */
-#define le64_to_cpu(x) (x)
-#define le32_to_cpu(x) (x)
-#define le16_to_cpu(x) (x)
-#define read32(x) le32_to_cpu (*((guint32 *) (x)))
-#define read16(x) le16_to_cpu (*((guint16 *) (x)))
-#define read64(x) le64_to_cpu (*((guint64 *) (x)))
-
-static guint32
-coff_map (dotnet_image_info_t *iinfo, guint32 addr)
-{
- const int top = iinfo->dn_section_count;
- section_table_t *tables = iinfo->dn_section_tables;
- int i;
-
- for (i = 0; i < top; i++){
- if ((addr >= tables->st_virtual_address) &&
- (addr < tables->st_virtual_address + tables->st_raw_data_size)){
- return addr - tables->st_virtual_address + tables->st_raw_data_ptr;
- }
- tables++;
- }
- return INVALID_ADDRESS;
-}
+/*
+ * keeps track of loaded assemblies
+ */
+static GHashTable *assemblies;
-static int
-load_section_tables (MonoAssembly *assembly, dotnet_image_info_t *iinfo)
+/**
+ * g_concat_dir_and_file:
+ * @dir: directory name
+ * @file: filename.
+ *
+ * returns a new allocated string that is the concatenation of dir and file,
+ * takes care of the exact details for concatenating them.
+ */
+static char *
+g_concat_dir_and_file (const char *dir, const char *file)
{
- const int top = iinfo->dn_header.coff.coff_sections;
- int i;
-
- iinfo->dn_section_count = top;
- iinfo->dn_section_tables = g_new (section_table_t, top);
-
- for (i = 0; i < top; i++){
- section_table_t *t = &iinfo->dn_section_tables [i];
-
- if (fread (t, sizeof (section_table_t), 1, assembly->f) != 1)
- return FALSE;
+ g_return_val_if_fail (dir != NULL, NULL);
+ g_return_val_if_fail (file != NULL, NULL);
- t->st_virtual_size = le32_to_cpu (t->st_virtual_size);
- t->st_virtual_address = le32_to_cpu (t->st_virtual_address);
- t->st_raw_data_size = le32_to_cpu (t->st_raw_data_size);
- t->st_raw_data_ptr = le32_to_cpu (t->st_raw_data_ptr);
- t->st_reloc_ptr = le32_to_cpu (t->st_reloc_ptr);
- t->st_lineno_ptr = le32_to_cpu (t->st_lineno_ptr);
- t->st_reloc_count = le16_to_cpu (t->st_reloc_count);
- t->st_line_count = le16_to_cpu (t->st_line_count);
- }
-
- return TRUE;
+ /*
+ * If the directory name doesn't have a / on the end, we need
+ * to add one so we get a proper path to the file
+ */
+ if (dir [strlen(dir) - 1] != G_DIR_SEPARATOR)
+ return g_strconcat (dir, G_DIR_SEPARATOR_S, file, NULL);
+ else
+ return g_strconcat (dir, file, NULL);
}
-static gboolean
-load_cli_header (MonoAssembly *assembly, dotnet_image_info_t *iinfo)
+static char *
+default_assembly_name_resolver (const char *base_dir, const char *name)
{
- guint32 offset;
- int n;
-
- offset = coff_map (iinfo, iinfo->dn_header.datadir.pe_cli_header.rva);
- if (offset == INVALID_ADDRESS)
- return FALSE;
-
- if (fseek (assembly->f, offset, 0) != 0)
- return FALSE;
-
- if ((n = fread (&iinfo->dn_cli_header, sizeof (cli_header_t), 1, assembly->f)) != 1)
- return FALSE;
-
- /* Catch new uses of the fields that are supposed to be zero */
-
- if ((iinfo->dn_cli_header.ch_eeinfo_table.rva != 0) ||
- (iinfo->dn_cli_header.ch_helper_table.rva != 0) ||
- (iinfo->dn_cli_header.ch_dynamic_info.rva != 0) ||
- (iinfo->dn_cli_header.ch_delay_load_info.rva != 0) ||
- (iinfo->dn_cli_header.ch_module_image.rva != 0) ||
- (iinfo->dn_cli_header.ch_external_fixups.rva != 0) ||
- (iinfo->dn_cli_header.ch_ridmap.rva != 0) ||
- (iinfo->dn_cli_header.ch_debug_map.rva != 0) ||
- (iinfo->dn_cli_header.ch_ip_map.rva != 0)){
- g_message ("Some fields in the CLI header which should have been zero are not zero");
- }
-
- return TRUE;
+ char *file, *path;
+
+ if ((strcmp (name, "mscorlib") == 0) ||
+ (strcmp (name, "mscorlib.dll") == 0) ||
+ (strcmp (name, "corlib.dll") == 0) ||
+ (strcmp (name, "corlib") == 0))
+ return g_concat_dir_and_file (MONO_ASSEMBLIES, CORLIB_NAME);
+
+ path = g_concat_dir_and_file (base_dir, name);
+ if (g_file_test (name, G_FILE_TEST_EXISTS))
+ return path;
+
+ file = path;
+ path = g_strconcat (file, ".dll", NULL);
+ g_free (file);
+ if (g_file_test (path, G_FILE_TEST_EXISTS))
+ return path;
+ g_free (path);
+
+ path = g_concat_dir_and_file (MONO_ASSEMBLIES, name);
+ if (g_file_test (path, G_FILE_TEST_EXISTS))
+ return path;
+ g_free (path);
+
+ file = g_strconcat (name, ".dll", NULL);
+ path = g_concat_dir_and_file (MONO_ASSEMBLIES, file);
+ g_free (file);
+
+ return path;
}
-static gboolean
-load_metadata_ptrs (MonoAssembly *assembly, dotnet_image_info_t *iinfo)
+/**
+ * mono_assembly_open:
+ * @filename: Opens the assembly pointed out by this name
+ * @resolver: A user provided function to resolve assembly references
+ * @status: where a status code can be returned
+ *
+ * mono_assembly_open opens the PE-image pointed by @filename, and
+ * loads any external assemblies referenced by it.
+ *
+ * NOTE: we could do lazy loading of the assemblies. Or maybe not worth
+ * it.
+ */
+MonoAssembly *
+mono_assembly_open (const char *filename, MonoAssemblyResolverFn resolver,
+ enum MonoImageOpenStatus *status)
{
- metadata_t *metadata = &iinfo->dn_metadata;
- guint32 offset, size;
- guint16 records;
+ MonoAssembly *ass;
+ MonoImage *image;
+ MonoTableInfo *t;
int i;
- char *ptr;
+ char *fullname, *base_dir;
+ const char *base_name = strrchr (filename, G_DIR_SEPARATOR);
+ static MonoAssembly *corlib;
- offset = coff_map (iinfo, iinfo->dn_cli_header.ch_metadata.rva);
- size = iinfo->dn_cli_header.ch_metadata.size;
-
- metadata->raw_metadata = raw_buffer_load (fileno (assembly->f), FALSE, offset, size);
- if (metadata->raw_metadata == NULL)
- return FALSE;
+ g_return_val_if_fail (filename != NULL, NULL);
- ptr = metadata->raw_metadata;
+ if (assemblies == NULL)
+ assemblies = g_hash_table_new (g_str_hash, g_str_equal);
- /*
- * Handle Beta 1 and ECMA versions of the metadata root
- */
- if (strncmp (ptr, "COM+", 4) == 0){
- ptr += 10;
- } else if (strncmp (ptr, "BSJB", 4) == 0){
- guint32 version_string_len;
-
- ptr += 12;
- version_string_len = read32 (ptr);
- ptr += 4;
- ptr += version_string_len;
- if (((guint32) ptr) % 4)
- ptr += 4 - (((guint32) ptr) %4);
+ if ((ass = g_hash_table_lookup (assemblies, filename)) != NULL){
+ ass->ref_count++;
+ return ass;
}
-
- /* skip over flags */
- ptr += 2;
- records = read16 (ptr);
- ptr += 2;
+ if (base_name == NULL)
+ base_name = filename;
+ else
+ base_name++;
- for (i = 0; i < records; i++){
- if (strncmp (ptr + 8, "#~", 3) == 0){
- metadata->heap_tables.sh_offset = read32 (ptr);
- metadata->heap_tables.sh_size = read32 (ptr + 4);
- ptr += 8 + 3;
- } else if (strncmp (ptr + 8, "#Strings", 9) == 0){
- metadata->heap_strings.sh_offset = read32 (ptr);
- metadata->heap_strings.sh_size = read32 (ptr + 4);
- ptr += 8 + 9;
- } else if (strncmp (ptr + 8, "#US", 4) == 0){
- metadata->heap_us.sh_offset = read32 (ptr);
- metadata->heap_us.sh_size = read32 (ptr + 4);
- ptr += 8 + 4;
- } else if (strncmp (ptr + 8, "#Blob", 6) == 0){
- metadata->heap_blob.sh_offset = read32 (ptr);
- metadata->heap_blob.sh_size = read32 (ptr + 4);
- ptr += 8 + 6;
- } else if (strncmp (ptr + 8, "#GUID", 6) == 0){
- metadata->heap_guid.sh_offset = read32 (ptr);
- metadata->heap_guid.sh_size = read32 (ptr + 4);
- ptr += 8 + 6;
- } else
- g_message ("Unknown heap type: %s\n", ptr + 8);
- if (((guint32)ptr) % 4){
- ptr += 4 - (((guint32)ptr) % 4);
- }
- }
- return TRUE;
-}
+ if (resolver == NULL)
+ resolver = default_assembly_name_resolver;
-static gboolean
-load_tables (MonoAssembly *assembly, metadata_t *meta)
-{
- char *heap_tables = meta->raw_metadata + meta->heap_tables.sh_offset;
- guint32 *rows;
- guint64 valid_mask;
- int valid = 0, table;
+ base_dir = g_path_get_dirname (fullname);
- valid_mask = read64 (heap_tables + 8);
- rows = (guint32 *) (heap_tables + 24);
-
- for (table = 0; table < 64; table++){
- if ((valid_mask & ((guint64) 1 << table)) == 0){
- meta->rows [table] = 0;
- continue;
- }
- meta->rows [table] = *rows;
- rows++;
- valid++;
- }
-
- return TRUE;
-}
+ fullname = resolver (base_dir, filename);
+ image = mono_image_open (fullname, status);
-static gboolean
-load_metadata (MonoAssembly *assembly, dotnet_image_info_t *iinfo)
-{
- if (!load_metadata_ptrs (assembly, iinfo))
- return FALSE;
-
- return load_tables (assembly, &iinfo->dn_metadata);
-}
-
-MonoAssembly *
-mono_assembly_open (const char *fname, enum MonoAssemblyOpenStatus *status)
-{
- dotnet_image_info_t *iinfo;
- dotnet_header_t *header;
- msdos_header_t msdos;
- MonoAssembly *assembly;
- int n;
-
- assembly = g_new (MonoAssembly, 1);
- assembly->f = fopen (fname, "r");
- iinfo = g_new (dotnet_image_info_t, 1);
- assembly->image_info = iinfo;
-
- header = &iinfo->dn_header;
-
- if (assembly->f == NULL){
+ if (!image){
if (status)
- *status = MONO_ASSEMBLY_ERROR_ERRNO;
- mono_assembly_close (assembly);
+ *status = MONO_IMAGE_ERROR_ERRNO;
+ g_free (fullname);
+ g_free (base_dir);
return NULL;
}
- if (status)
- *status = MONO_ASSEMBLY_IMAGE_INVALID;
-
- if (fread (&msdos, sizeof (msdos), 1, assembly->f) != 1)
- goto invalid_image;
-
- if (!(msdos.msdos_header [0] == 0x4d && msdos.msdos_header [1] == 0x5a))
- goto invalid_image;
-
- if ((n = fread (header, sizeof (dotnet_header_t), 1, assembly->f)) != 1)
- goto invalid_image;
+ t = &image->tables [MONO_TABLE_ASSEMBLYREF];
+
+ image->references = g_new0 (MonoAssembly *, t->rows + 1);
/*
- * FIXME: byte swap all addresses here for header.
+ * Create assembly struct, and enter it into the assembly cache
*/
-
- if (!load_section_tables (assembly, iinfo))
- goto invalid_image;
-
- /* Load the CLI header */
- if (!load_cli_header (assembly, iinfo))
- goto invalid_image;
+ ass = g_new (MonoAssembly, 1);
+ ass->name = fullname;
+ ass->image = image;
- if (!load_metadata (assembly, iinfo))
- goto invalid_image;
+ g_hash_table_insert (assemblies, image->name, ass);
+ g_hash_table_insert (assemblies, ass->name, ass);
- if (status)
- *status = MONO_ASSEMBLY_OK;
-
- return assembly;
+ /*
+ * Load any assemblies this image references
+ */
+ for (i = 0; i < t->rows; i++){
+ char *assembly_ref;
+ const char *name;
+ guint32 cols [MONO_ASSEMBLYREF_SIZE];
+
+ mono_metadata_decode_row (t, i, cols, CSIZE (cols));
+ name = mono_metadata_string_heap (image, cols [MONO_ASSEMBLYREF_NAME]);
+
+ /*
+ * Special case until we have a passable corlib:
+ *
+ * ie, references to mscorlib from corlib.dll are ignored
+ * and we do not load corlib twice.
+ */
+ if (strcmp (base_name, CORLIB_NAME) == 0){
+ if (corlib == NULL)
+ corlib = ass;
+
+ if (strcmp (name, "mscorlib") == 0)
+ continue;
+ }
+
+ assembly_ref = (*resolver) (base_dir, name);
+
+ image->references [i] = mono_assembly_open (assembly_ref, resolver, status);
+
+ if (image->references [i] == NULL){
+ int j;
+
+ for (j = 0; j < i; j++)
+ mono_assembly_close (image->references [j]);
+ g_free (image->references);
+ mono_image_close (image);
+
+ g_warning ("Could not find assembly %s %s", name, assembly_ref);
+ g_free (assembly_ref);
+ if (status)
+ *status = MONO_IMAGE_MISSING_ASSEMBLYREF;
+ g_free (ass);
+ g_free (base_dir);
+ return NULL;
+ }
+ g_free (assembly_ref);
+ }
+ image->references [i] = NULL;
-invalid_image:
- mono_assembly_close (assembly);
- return NULL;
+ g_free (base_dir);
+ return ass;
}
void
mono_assembly_close (MonoAssembly *assembly)
{
+ MonoImage *image;
+ int i;
+
g_return_if_fail (assembly != NULL);
- if (assembly->f)
- fclose (assembly->f);
-
- if (assembly->image_info){
- dotnet_image_info_t *ii = assembly->image_info;
-
- if (ii->dn_metadata.raw_metadata != NULL)
- raw_buffer_free (ii->dn_metadata.raw_metadata);
+ if (--assembly->ref_count != 0)
+ return;
- if (ii->dn_section_tables)
- g_free (ii->dn_section_tables);
+ image = assembly->image;
+ for (i = 0; image->references [i] != NULL; i++)
+ mono_image_close (image->references [i]->image);
+ g_free (image->references);
+
+ mono_image_close (assembly->image);
- g_free (assembly->image_info);
- }
-
+ g_hash_table_remove (assemblies, assembly->name);
+
+ g_free (assembly->name);
g_free (assembly);
}
-const char *
-mono_assembly_strerror (enum MonoAssemblyOpenStatus status)
+/*
+ * Temporary hack until we get AppDomains
+ */
+GHashTable *
+mono_get_assemblies ()
{
- switch (status){
- case MONO_ASSEMBLY_OK:
- return "succes";
- case MONO_ASSEMBLY_ERROR_ERRNO:
- return strerror (errno);
- case MONO_ASSEMBLY_IMAGE_INVALID:
- return "File does not contain a valid CIL image";
- }
- return "Internal error";
+ return assemblies;
}
projects / mono.git / blobdiff