initial commit.

1 files changed, 139 insertions, 0 deletions

diff --git a/src/reader/pe_read_optional_header.c b/src/reader/pe_read_optional_header.c
new file mode 100644
index 0000000..701c6a9
--- /dev/null
+++ b/src/reader/pe_read_optional_header.c
@@ -0,0 +1,139 @@
+#include <endian.h>
+#include <string.h>
+
+#include <perk/perk.h>
+#include "perk_impl.h"
+
+int pe_read_optional_header(const union pe_opt_hdr * p, struct pe_meta_opt_hdr * m)
+{
+	struct pe_opt_hdr_std *		astd;
+	struct pe_opt_hdr_vers *	avers;
+	struct pe_opt_hdr_align *	aalign;
+	struct pe_opt_hdr_img *		aimg;
+	struct pe_opt_hdr_ldr *		aldr;
+	struct pe_opt_hdr_dirs *	adirs;
+	size_t				sdirs;
+
+	m->std.magic = pe_read_short(p->opt_hdr_32.magic);
+	memset(&m->dirs,0,sizeof(m->dirs));
+
+	#if (BYTE_ORDER == LITTLE_ENDIAN)
+
+	memcpy(&m->std,p,sizeof(struct pe_meta_opt_hdr_std));
+
+	switch (m->std.magic) {
+		case PE_MAGIC_PE32:
+			memcpy(&m->vers,&p->opt_hdr_32.major_os_ver,sizeof(struct pe_meta_opt_hdr_vers));
+			memcpy(&m->align,&p->opt_hdr_32.section_align,sizeof(struct pe_meta_opt_hdr_align));
+			memcpy(&m->img,&p->opt_hdr_32.size_of_image,sizeof(struct pe_meta_opt_hdr_img));
+			memcpy(&m->ldr,&p->opt_hdr_32.loader_flags,sizeof(struct pe_meta_opt_hdr_ldr));
+
+			if (m->ldr.rva_and_sizes > 0x10)
+				return PERK_BAD_IMAGE_TYPE;
+			else
+				memcpy(&m->dirs,&p->opt_hdr_32.export_tbl,sizeof(struct pe_meta_opt_hdr_dirs));
+
+			break;
+
+		case PE_MAGIC_PE32_PLUS:
+			memcpy(&m->vers,&p->opt_hdr_64.major_os_ver,sizeof(struct pe_meta_opt_hdr_vers));
+			memcpy(&m->align,&p->opt_hdr_64.section_align,sizeof(struct pe_meta_opt_hdr_align));
+			memcpy(&m->img,&p->opt_hdr_64.size_of_image,sizeof(struct pe_meta_opt_hdr_img));
+			memcpy(&m->ldr,&p->opt_hdr_64.loader_flags,sizeof(struct pe_meta_opt_hdr_ldr));
+
+			if (m->ldr.rva_and_sizes > 0x10)
+				return PERK_BAD_IMAGE_TYPE;
+			else
+				memcpy(&m->dirs,&p->opt_hdr_64.export_tbl,sizeof(struct pe_meta_opt_hdr_dirs));
+
+			break;
+
+		default:
+			return PERK_BAD_IMAGE_TYPE;
+	};
+
+	#else
+
+	astd = (struct pe_opt_hdr_std *)p;
+
+	switch (m->std.magic) {
+		case PE_MAGIC_PE32:
+			avers	= (struct pe_opt_hdr_std *)&p->opt_hdr_32.major_os_ver;
+			aalign	= (struct pe_opt_hdr_std *)&p->opt_hdr_32.section_align;
+			aimg	= (struct pe_opt_hdr_img *)&p->opt_hdr_32.size_of_image;
+			aldr	= (struct pe_opt_hdr_ldr *)&p->opt_hdr_32.loader_flags;
+			adirs	= (struct pe_opt_hdr_dirs *)&p->opt_hdr_32.export_tbl;
+			break;
+
+		case PE_MAGIC_PE32_PLUS:
+			avers	= (struct pe_opt_hdr_std *)&p->opt_hdr_64.major_os_ver;
+			aalign	= (struct pe_opt_hdr_std *)&p->opt_hdr_64.section_align;
+			aimg	= (struct pe_opt_hdr_img *)&p->opt_hdr_64.size_of_image;
+			aldr	= (struct pe_opt_hdr_ldr *)&p->opt_hdr_64.loader_flags;
+			adirs	= (struct pe_opt_hdr_dirs *)&p->opt_hdr_64.export_tbl;
+			break;
+
+		default:
+			return PERK_BAD_IMAGE_TYPE;
+	}
+
+	/* std */
+	m->std.major_linker_ver			= astd->major_linker_ver;
+	m->std.minor_linker_ver			= astd->minor_linker_ver;
+
+	m->std.size_of_code			= pe_read_long(astd->size_of_code);
+	m->std.size_of_initialized_data		= pe_read_long(astd->size_of_initialized_data);
+	m->std.size_of_uninitialized_data	= pe_read_long(astd->size_of_uninitialized_data);
+	m->std.entry_point			= pe_read_long(astd->entry_point);
+	m->std.base_of_code			= pe_read_long(astd->base_of_code);
+
+	/* vers */
+	m->vers.major_os_ver			= pe_read_short(avers->major_os_ver);
+	m->vers.minor_os_ver			= pe_read_short(avers->minor_os_ver);
+	m->vers.major_image_ver			= pe_read_short(avers->major_image_ver);
+	m->vers.minor_image_ver			= pe_read_short(avers->minor_image_ver);
+	m->vers.major_subsys_ver		= pe_read_short(avers->major_subsys_ver);
+	m->vers.minor_subsys_ver		= pe_read_short(avers->minor_subsys_ver);
+
+	m->vers.win32_ver			= pe_read_long(avers->win32_ver);
+
+	/* align */
+	m->align.section_align			= pe_read_long(aalign->section_align);
+	m->align.file_align			= pe_read_long(aalign->file_align);
+
+	/* img */
+	m->img.size_of_image			= pe_read_long(aimg->size_of_image);
+	m->img.size_of_headers			= pe_read_long(aimg->size_of_headers);
+	m->img.checksum				= pe_read_long(aimg->checksum);
+
+	m->img.subsystem			= pe_read_short(aimg->subsystem);
+	m->img.dll_characteristics		= pe_read_short(aimg->dll_characteristics);
+
+	/* ldr */
+	m->ldr.loader_flags			= pe_read_long(aldr->loader_flags);
+	m->ldr.rva_and_sizes			= pe_read_long(aldr->rva_and_sizes);
+
+	#endif
+
+	switch (m->std.magic) {
+		case PE_MAGIC_PE32:
+			m->mem.base_of_data		= pe_read_long(p->opt_hdr_32.base_of_data);
+			m->mem.image_base		= pe_read_long(p->opt_hdr_32.image_base);
+			m->mem.size_of_stack_reserve	= pe_read_long(p->opt_hdr_32.size_of_stack_reserve);
+			m->mem.size_of_stack_commit	= pe_read_long(p->opt_hdr_32.size_of_stack_commit);
+			m->mem.size_of_heap_reserve	= pe_read_long(p->opt_hdr_32.size_of_heap_reserve);
+			m->mem.size_of_heap_commit	= pe_read_long(p->opt_hdr_32.size_of_heap_commit);
+			break;
+
+		case PE_MAGIC_PE32_PLUS:
+			m->mem.base_of_data		= (uint64_t)-1;
+			m->mem.image_base		= pe_read_quad(p->opt_hdr_64.image_base);
+			m->mem.size_of_stack_reserve	= pe_read_quad(p->opt_hdr_64.size_of_stack_reserve);
+			m->mem.size_of_stack_commit	= pe_read_quad(p->opt_hdr_64.size_of_stack_commit);
+			m->mem.size_of_heap_reserve	= pe_read_quad(p->opt_hdr_64.size_of_heap_reserve);
+			m->mem.size_of_heap_commit	= pe_read_quad(p->opt_hdr_64.size_of_heap_commit);
+			break;
+	};
+
+	return 0;
+};