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