initial commit.

6 files changed, 195 insertions, 0 deletions

diff --git a/src/headers/pe_get_image_coff_hdr_addr.c b/src/headers/pe_get_image_coff_hdr_addr.c
new file mode 100644
index 0000000..d2ff03a
--- /dev/null
+++ b/src/headers/pe_get_image_coff_hdr_addr.c
@@ -0,0 +1,30 @@
+/*****************************************************************************/
+/*  pemagination: a (virtual) tour into portable bits and executable bytes   */
+/*  Copyright (C) 2013,2014,2015  Z. Gilboa                                  */
+/*  Released under GPLv2 and GPLv3; see COPYING.PEMAGINE.                    */
+/*****************************************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <pemagine/pe_consts.h>
+#include <pemagine/pe_structs.h>
+#include <pemagine/pemagine.h>
+
+pe_api
+struct pe_coff_file_hdr * pe_get_image_coff_hdr_addr(const void * base)
+{
+	struct pe_image_dos_hdr *	dos;
+	struct pe_coff_file_hdr *	coff;
+	uint32_t *			offset;
+
+	if (!(dos = pe_get_image_dos_hdr_addr(base)))
+		return 0;
+
+	offset   = (uint32_t *)(dos->dos_lfanew);
+	coff = (struct pe_coff_file_hdr *)pe_va_from_rva(base,*offset);
+
+	if ((coff->signature[0] == 'P') && (coff->signature[1] == 'E')
+			&& (coff->signature[2] == '\0') && (coff->signature[3] == '\0'))
+		return coff;
+	else
+		return 0;
+}
diff --git a/src/headers/pe_get_image_data_dirs_addr.c b/src/headers/pe_get_image_data_dirs_addr.c
new file mode 100644
index 0000000..d0167c0
--- /dev/null
+++ b/src/headers/pe_get_image_data_dirs_addr.c
@@ -0,0 +1,33 @@
+/*****************************************************************************/
+/*  pemagination: a (virtual) tour into portable bits and executable bytes   */
+/*  Copyright (C) 2013,2014,2015  Z. Gilboa                                  */
+/*  Released under GPLv2 and GPLv3; see COPYING.PEMAGINE.                    */
+/*****************************************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <pemagine/pe_consts.h>
+#include <pemagine/pe_structs.h>
+#include <pemagine/pemagine.h>
+
+pe_api
+struct pe_data_dirs * pe_get_image_data_dirs_addr(const void * base)
+{
+	uint16_t *		magic;
+	union pe_opt_hdr *	hdr;
+
+	if (!(hdr = pe_get_image_opt_hdr_addr(base)))
+		return 0;
+
+	magic = (uint16_t *)hdr;
+
+	switch (*magic) {
+		case PE_MAGIC_PE32:
+			return (struct pe_data_dirs *)hdr->opt_hdr_32.rva_and_sizes;
+
+		case PE_MAGIC_PE32_PLUS:
+			return (struct pe_data_dirs *)hdr->opt_hdr_64.rva_and_sizes;
+
+		default:
+			return 0;
+	}
+}
diff --git a/src/headers/pe_get_image_dos_hdr_addr.c b/src/headers/pe_get_image_dos_hdr_addr.c
new file mode 100644
index 0000000..279d04e
--- /dev/null
+++ b/src/headers/pe_get_image_dos_hdr_addr.c
@@ -0,0 +1,24 @@
+/*****************************************************************************/
+/*  pemagination: a (virtual) tour into portable bits and executable bytes   */
+/*  Copyright (C) 2013,2014,2015  Z. Gilboa                                  */
+/*  Released under GPLv2 and GPLv3; see COPYING.PEMAGINE.                    */
+/*****************************************************************************/
+
+#include <psxtypes/psxtypes.h>
+
+#include <pemagine/pe_consts.h>
+#include <pemagine/pe_structs.h>
+#include <pemagine/pemagine.h>
+
+pe_api
+struct pe_image_dos_hdr * pe_get_image_dos_hdr_addr(const void * base)
+{
+	struct pe_image_dos_hdr * dos;
+
+	dos = (struct pe_image_dos_hdr *)base;
+
+	if ((dos->dos_magic[0] == 'M') && (dos->dos_magic[1] == 'Z'))
+		return dos;
+	else
+		return 0;
+}
diff --git a/src/headers/pe_get_image_entry_point_addr.c b/src/headers/pe_get_image_entry_point_addr.c
new file mode 100644
index 0000000..5869633
--- /dev/null
+++ b/src/headers/pe_get_image_entry_point_addr.c
@@ -0,0 +1,39 @@
+/*****************************************************************************/
+/*  pemagination: a (virtual) tour into portable bits and executable bytes   */
+/*  Copyright (C) 2013,2014,2015  Z. Gilboa                                  */
+/*  Released under GPLv2 and GPLv3; see COPYING.PEMAGINE.                    */
+/*****************************************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <pemagine/pe_structs.h>
+#include <pemagine/pe_consts.h>
+#include <pemagine/pemagine.h>
+
+
+pe_api
+void * pe_get_image_entry_point_addr(const void * base)
+{
+	uint16_t *		magic;
+	union pe_opt_hdr *	hdr;
+	uint32_t *		rva;
+
+	if (!(hdr = pe_get_image_opt_hdr_addr(base)))
+		return 0;
+
+	magic = (uint16_t *)hdr;
+
+	switch (*magic) {
+		case PE_MAGIC_PE32:
+			rva = (uint32_t *)hdr->opt_hdr_32.entry_point;
+			break;
+
+		case PE_MAGIC_PE32_PLUS:
+			rva = (uint32_t *)hdr->opt_hdr_64.entry_point;
+			break;
+
+		default:
+			return 0;
+	}
+
+	return pe_va_from_rva(base,*rva);
+}
diff --git a/src/headers/pe_get_image_opt_hdr_addr.c b/src/headers/pe_get_image_opt_hdr_addr.c
new file mode 100644
index 0000000..dcb8c48
--- /dev/null
+++ b/src/headers/pe_get_image_opt_hdr_addr.c
@@ -0,0 +1,20 @@
+/*****************************************************************************/
+/*  pemagination: a (virtual) tour into portable bits and executable bytes   */
+/*  Copyright (C) 2013,2014,2015  Z. Gilboa                                  */
+/*  Released under GPLv2 and GPLv3; see COPYING.PEMAGINE.                    */
+/*****************************************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <pemagine/pe_structs.h>
+#include <pemagine/pemagine.h>
+
+pe_api
+union pe_opt_hdr * pe_get_image_opt_hdr_addr(const void * base)
+{
+	struct pe_coff_file_hdr * coff;
+
+	if (!(coff = pe_get_image_coff_hdr_addr(base)))
+		return 0;
+	else
+		return (union pe_opt_hdr *)pe_va_from_rva(coff, sizeof(*coff));
+}
diff --git a/src/headers/pe_get_image_special_hdr_addr.c b/src/headers/pe_get_image_special_hdr_addr.c
new file mode 100644
index 0000000..276ec9f
--- /dev/null
+++ b/src/headers/pe_get_image_special_hdr_addr.c
@@ -0,0 +1,49 @@
+/*****************************************************************************/
+/*  pemagination: a (virtual) tour into portable bits and executable bytes   */
+/*  Copyright (C) 2013,2014,2015  Z. Gilboa                                  */
+/*  Released under GPLv2 and GPLv3; see COPYING.PEMAGINE.                    */
+/*****************************************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <pemagine/pe_consts.h>
+#include <pemagine/pe_structs.h>
+#include <pemagine/pemagine.h>
+#include "pe_impl.h"
+
+pe_api
+void * pe_get_image_special_hdr_addr(const void * base, uint32_t ordinal, uint32_t * sec_size)
+{
+	struct pe_data_dirs *	dirs;
+	struct pe_block *	dir;
+	uint32_t *		count;
+
+	if (!(dirs = pe_get_image_data_dirs_addr(base)))
+		return 0;
+
+	count = (uint32_t *)dirs->rva_and_sizes;
+
+	if (*count < (ordinal+1))
+		return 0;
+
+	dir = (struct pe_block *)dirs->export_tbl;
+	dir += ordinal;
+
+	if (sec_size)
+		*sec_size = dir->size;
+
+	return dir->rva
+		? pe_va_from_rva(base,dir->rva)
+		: 0;
+}
+
+pe_api
+struct pe_export_hdr * pe_get_image_export_hdr_addr(const void * base, uint32_t * sec_size)
+{
+	return (struct pe_export_hdr *)pe_get_image_special_hdr_addr(base,PE_IMAGE_DATA_DIR_ORDINAL_EXPORT,sec_size);
+}
+
+pe_api
+struct pe_import_hdr * pe_get_image_import_dir_addr(const void * base, uint32_t * sec_size)
+{
+	return (struct pe_import_hdr *)pe_get_image_special_hdr_addr(base,PE_IMAGE_DATA_DIR_ORDINAL_IMPORT,sec_size);
+}