lx_dump.c
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/**
* 2ine; an OS/2 emulator for Linux.
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
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#include "lib2ine.h"
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// !!! FIXME: some cut-and-paste with lx_loader.c ...
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static int sanityCheckLxExe(const uint8 *exe, const uint32 exelen)
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if (sizeof (LxHeader) >= exelen) {
fprintf(stderr, "not an OS/2 EXE\n");
return 0;
}
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const LxHeader *lx = (const LxHeader *) exe;
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if ((lx->byte_order != 0) || (lx->word_order != 0)) {
fprintf(stderr, "Program is not little-endian!\n");
return 0;
}
if (lx->lx_version != 0) {
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fprintf(stderr, "Program is unknown LX EXE version (%u)\n", (uint) lx->lx_version);
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return 0;
}
if (lx->cpu_type > 3) { // 1==286, 2==386, 3==486
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fprintf(stderr, "Program needs unknown CPU type (%u)\n", (uint) lx->cpu_type);
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return 0;
}
if (lx->os_type != 1) { // 1==OS/2, others: dos4, windows, win386, unknown.
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fprintf(stderr, "Program needs unknown OS type (%u)\n", (uint) lx->os_type);
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return 0;
}
if (lx->page_size != 4096) {
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fprintf(stderr, "Program page size isn't 4096 (%u)\n", (uint) lx->page_size);
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return 0;
}
return 1;
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} // sanityCheckLxExe
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static int sanityCheckNeExe(const uint8 *exe, const uint32 exelen)
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if (sizeof (NeHeader) >= exelen) {
fprintf(stderr, "not an OS/2 EXE\n");
return 0;
}
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const NeHeader *ne = (const NeHeader *) exe;
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if (ne->exe_type > 1) {
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fprintf(stderr, "Not an OS/2 NE EXE file (exe_type is %d, not 1)\n", (int) ne->exe_type);
return 0;
}
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return 1;
} // sanityCheckNeExe
static int sanityCheckExe(uint8 **_exe, uint32 *_exelen, int *_is_lx)
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if (*_exelen < 62) {
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fprintf(stderr, "not an OS/2 EXE\n");
return 0;
}
const uint32 header_offset = *((uint32 *) (*_exe + 0x3C));
//printf("header offset is %u\n", (uint) header_offset);
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*_exe += header_offset; // skip the DOS stub, etc.
*_exelen -= header_offset;
const uint8 *magic = *_exe;
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if ((magic[0] == 'L') && (magic[1] == 'X')) {
*_is_lx = 1;
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return sanityCheckLxExe(*_exe, *_exelen);
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} else if ((magic[0] == 'N') && (magic[1] == 'E')) {
*_is_lx = 0;
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return sanityCheckNeExe(*_exe, *_exelen);
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}
fprintf(stderr, "not an OS/2 EXE\n");
return 0;
} // sanityCheckExe
static int parseLxExe(const uint8 *origexe, const uint8 *exe)
{
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const LxHeader *lx = (const LxHeader *) exe;
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printf("LX (32-bit) executable.\n");
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printf("module version: %u\n", (uint) lx->module_version);
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printf("module flags:");
if (lx->module_flags & 0x4) printf(" LIBINIT");
if (lx->module_flags & 0x10) printf(" INTERNALFIXUPS");
if (lx->module_flags & 0x20) printf(" EXTERNALFIXUPS");
if (lx->module_flags & 0x100) printf(" PMINCOMPAT");
if (lx->module_flags & 0x200) printf(" PMCOMPAT");
if (lx->module_flags & 0x300) printf(" USESPM");
if (lx->module_flags & 0x2000) printf(" NOTLOADABLE");
if (lx->module_flags & 0x8000) printf(" LIBRARYMODULE");
if (lx->module_flags & 0x18000) printf(" PROTMEMLIBRARYMODULE");
if (lx->module_flags & 0x20000) printf(" PHYSDRIVERMODULE");
if (lx->module_flags & 0x28000) printf(" VIRTDRIVERMODULE");
if (lx->module_flags & 0x40000000) printf(" LIBTERM");
printf("\n");
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printf("Number of pages in module: %u\n", (uint) lx->module_num_pages);
printf("EIP Object number: %u\n", (uint) lx->eip_object);
printf("EIP: 0x%X\n", (uint) lx->eip);
printf("ESP Object number: %u\n", (uint) lx->esp_object);
printf("ESP: 0x%X\n", (uint) lx->esp);
printf("Page size: %u\n", (uint) lx->page_size);
printf("Page offset shift: %u\n", (uint) lx->page_offset_shift);
printf("Fixup section size: %u\n", (uint) lx->fixup_section_size);
printf("Fixup section checksum: 0x%X\n", (uint) lx->fixup_section_checksum);
printf("Loader section size: %u\n", (uint) lx->loader_section_size);
printf("Loader section checksum: 0x%X\n", (uint) lx->loader_section_checksum);
printf("Object table offset: %u\n", (uint) lx->object_table_offset);
printf("Number of objects in module: %u\n", (uint) lx->module_num_objects);
printf("Object page table offset: %u\n", (uint) lx->object_page_table_offset);
printf("Object iterated pages offset: %u\n", (uint) lx->object_iter_pages_offset);
printf("Resource table offset: %u\n", (uint) lx->resource_table_offset);
printf("Number of resource table entries: %u\n", (uint) lx->num_resource_table_entries);
printf("Resident name table offset: %u\n", (uint) lx->resident_name_table_offset);
printf("Entry table offset: %u\n", (uint) lx->entry_table_offset);
printf("Module directives offset: %u\n", (uint) lx->module_directives_offset);
printf("Number of module directives: %u\n", (uint) lx->num_module_directives);
printf("Fixup page table offset: %u\n", (uint) lx->fixup_page_table_offset);
printf("Fixup record table offset: %u\n", (uint) lx->fixup_record_table_offset);
printf("Import module table offset: %u\n", (uint) lx->import_module_table_offset);
printf("Number of inport module entries: %u\n", (uint) lx->num_import_mod_entries);
printf("Import procedure name table offset: %u\n", (uint) lx->import_proc_table_offset);
printf("Per-page checksum offset: %u\n", (uint) lx->per_page_checksum_offset);
printf("Data pages offset: %u\n", (uint) lx->data_pages_offset);
printf("Number of preload pages: %u\n", (uint) lx->num_preload_pages);
printf("Non-resident name table offset: %u\n", (uint) lx->non_resident_name_table_offset);
printf("Non-resident name table length: %u\n", (uint) lx->non_resident_name_table_len);
printf("Non-resident name table checksum: 0x%X\n", (uint) lx->non_resident_name_table_checksum);
printf("Auto data segment object number: %u\n", (uint) lx->auto_ds_object_num);
printf("Debug info offset: %u\n", (uint) lx->debug_info_offset);
printf("Debug info length: %u\n", (uint) lx->debug_info_len);
printf("Number of instance pages in preload section: %u\n", (uint) lx->num_instance_preload);
printf("Number of instance pages in demand section: %u\n", (uint) lx->num_instance_demand);
printf("Heap size: %u\n", (uint) lx->heapsize);
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/* This is apparently a requirement as of OS/2 2.0, according to lxexe.txt. */
if ((lx->object_iter_pages_offset != 0) && (lx->object_iter_pages_offset != lx->data_pages_offset)) {
fprintf(stderr, "Object iterator pages offset must be 0 or equal to Data pages offset\n");
}
// when an LX file says "object" it's probably more like "section" or "segment" ...?
printf("\n");
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printf("Object table (%u entries):\n", (uint) lx->module_num_objects);
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for (uint32 i = 0; i < lx->module_num_objects; i++) {
const LxObjectTableEntry *obj = ((const LxObjectTableEntry *) (exe + lx->object_table_offset)) + i;
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printf("Object #%u:\n", (uint) i+1);
printf("Virtual size: %u\n", (uint) obj->virtual_size);
printf("Relocation base address: 0x%X\n", (uint) obj->reloc_base_addr);
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printf("Object flags:");
if (obj->object_flags & 0x1) printf(" READ");
if (obj->object_flags & 0x2) printf(" WRITE");
if (obj->object_flags & 0x4) printf(" EXEC");
if (obj->object_flags & 0x8) printf(" RESOURCE");
if (obj->object_flags & 0x10) printf(" DISCARD");
if (obj->object_flags & 0x20) printf(" SHARED");
if (obj->object_flags & 0x40) printf(" PRELOAD");
if (obj->object_flags & 0x80) printf(" INVALID");
if (obj->object_flags & 0x100) printf(" ZEROFILL");
if (obj->object_flags & 0x200) printf(" RESIDENT");
if (obj->object_flags & 0x300) printf(" RESIDENT+CONTIG");
if (obj->object_flags & 0x400) printf(" RESIDENT+LONGLOCK");
if (obj->object_flags & 0x800) printf(" SYSRESERVED");
if (obj->object_flags & 0x1000) printf(" 16:16");
if (obj->object_flags & 0x2000) printf(" BIG");
if (obj->object_flags & 0x4000) printf(" CONFORM");
if (obj->object_flags & 0x8000) printf(" IOPL");
printf("\n");
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printf("Page table index: %u\n", (uint) obj->page_table_index);
printf("Number of page table entries: %u\n", (uint) obj->num_page_table_entries);
printf("System-reserved field: %u\n", (uint) obj->reserved);
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printf("Object pages:\n");
const LxObjectPageTableEntry *objpage = ((const LxObjectPageTableEntry *) (exe + lx->object_page_table_offset)) + (obj->page_table_index - 1);
const uint32 *fixuppage = (((const uint32 *) (exe + lx->fixup_page_table_offset)) + (obj->page_table_index - 1));
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for (uint32 i = 0; i < obj->num_page_table_entries; i++, objpage++, fixuppage++) {
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printf("Object Page #%u:\n", (uint) (i + obj->page_table_index));
printf("Page data offset: 0x%X\n", (uint) objpage->page_data_offset);
printf("Page data size: %u\n", (uint) objpage->data_size);
printf("Page flags: (%u)", (uint) objpage->flags);
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if (objpage->flags == 0x0) printf(" PHYSICAL");
else if (objpage->flags == 0x1) printf(" ITERATED");
else if (objpage->flags == 0x2) printf(" INVALID");
else if (objpage->flags == 0x3) printf(" ZEROFILL");
else if (objpage->flags == 0x4) printf(" RANGE");
else if (objpage->flags == 0x5) printf(" COMPRESSED");
else printf(" UNKNOWN");
printf("\n");
const uint32 fixupoffset = *fixuppage;
const uint32 fixuplen = fixuppage[1] - fixuppage[0];
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printf("Page's fixup record offset: %u\n", (uint) fixupoffset);
printf("Page's fixup record size: %u\n", (uint) fixuplen);
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printf("Fixup records:\n");
const uint8 *fixup = (exe + lx->fixup_record_table_offset) + fixupoffset;
const uint8 *fixupend = fixup + fixuplen;
for (uint32 i = 0; fixup < fixupend; i++) {
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printf("Fixup Record #%u:\n", (uint) (i + 1));
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printf("Source type: ");
const uint8 srctype = *(fixup++);
if (srctype & 0x10) printf("[FIXUPTOALIAS] ");
if (srctype & 0x20) printf("[SOURCELIST] ");
switch (srctype & 0xF) {
case 0x00: printf("Byte fixup"); break;
case 0x02: printf("16-bit selector fixup"); break;
case 0x03: printf("16:16 pointer fixup"); break;
case 0x05: printf("16-bit offset fixup"); break;
case 0x06: printf("16:32 pointer fixup"); break;
case 0x07: printf("32-bit offset fixup"); break;
case 0x08: printf("32-bit self-relative offset fixup"); break;
default: printf("(undefined fixup)"); break;
} // switch
printf("\n");
const uint8 fixupflags = *(fixup++);
printf("Target flags:");
switch (fixupflags & 0x3) {
case 0x0: printf(" INTERNAL"); break;
case 0x1: printf(" IMPORTBYORDINAL"); break;
case 0x2: printf(" IMPORTBYNAME"); break;
case 0x3: printf(" INTERNALVIAENTRY"); break;
} // switch
if (fixupflags & 0x4) printf(" ADDITIVE");
if (fixupflags & 0x8) printf(" INTERNALCHAINING");
if (fixupflags & 0x10) printf(" 32BITTARGETOFFSET");
if (fixupflags & 0x20) printf(" 32BITADDITIVE");
if (fixupflags & 0x40) printf(" 16BITORDINAL");
if (fixupflags & 0x80) printf(" 8BITORDINAL");
printf("\n");
uint8 srclist_count = 0;
if (srctype & 0x20) { // source list
srclist_count = *(fixup++);
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printf("Source offset list count: %u\n", (uint) srclist_count);
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} else {
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const sint16 srcoffset = *((sint16 *) fixup); fixup += 2;
printf("Source offset: %d\n", (int) srcoffset);
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} // else
printf("\n");
switch (fixupflags & 0x3) {
case 0x0:
printf("Internal fixup record:\n");
if (fixupflags & 0x40) { // 16 bit value
const uint16 val = *((uint16 *) fixup); fixup += 2;
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printf("Object: %u\n", (uint) val);
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} else {
const uint8 val = *(fixup++);
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printf("Object: %u\n", (uint) val);
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} // else
printf("Target offset: ");
if ((srctype & 0xF) == 0x2) { // 16-bit selector fixup
printf("[not used for 16-bit selector fixups]\n");
} else if (fixupflags & 0x10) { // 32-bit target offset
const uint32 val = *((uint32 *) fixup); fixup += 4;
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printf("%u\n", (uint) val);
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} else { // 16-bit target offset
const uint16 val = *((uint16 *) fixup); fixup += 2;
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printf("%u\n", (uint) val);
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} // else
break;
case 0x1:
printf("Import by ordinal fixup record:\n");
if (fixupflags & 0x40) { // 16 bit value
const uint16 val = *((uint16 *) fixup); fixup += 2;
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printf("Module ordinal: %u\n", (uint) val);
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} else {
const uint8 val = *(fixup++);
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printf("Module ordinal: %u\n", (uint) val);
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} // else
if (fixupflags & 0x80) { // 8 bit value
const uint8 val = *(fixup++);
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printf("Import ordinal: %u\n", (uint) val);
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} else if (fixupflags & 0x10) { // 32-bit value
const uint32 val = *((uint32 *) fixup); fixup += 4;
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printf("Import ordinal: %u\n", (uint) val);
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} else { // 16-bit value
const uint16 val = *((uint16 *) fixup); fixup += 2;
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printf("Import ordinal: %u\n", (uint) val);
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} // else
uint32 additive = 0;
if (fixupflags & 0x4) { // Has additive.
if (fixupflags & 0x20) { // 32-bit value
additive = *((uint32 *) fixup);
fixup += 4;
} else { // 16-bit value
additive = *((uint16 *) fixup);
fixup += 2;
} // else
} // if
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printf("Additive: %u\n", (uint) additive);
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break;
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case 0x2: {
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printf("Import by name fixup record:\n");
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if (fixupflags & 0x40) { // 16 bit value
const uint16 val = *((uint16 *) fixup); fixup += 2;
printf("Module ordinal: %u\n", (uint) val);
} else {
const uint8 val = *(fixup++);
printf("Module ordinal: %u\n", (uint) val);
} // else
uint32 name_offset = 0;
if (fixupflags & 0x10) { // 32-bit value
name_offset = *((uint32 *) fixup); fixup += 4;
} else { // 16-bit value
name_offset = *((uint16 *) fixup); fixup += 2;
} // else
const uint8 *import_name = (exe + lx->import_proc_table_offset) + name_offset;
char name[128];
const uint8 namelen = *(import_name++) & 0x7F;
memcpy(name, import_name, namelen);
name[namelen] = '\0';
printf("Name offset: %u ('%s')\n", (uint) name_offset, name);
uint32 additive = 0;
if (fixupflags & 0x4) { // Has additive.
if (fixupflags & 0x20) { // 32-bit value
additive = *((uint32 *) fixup);
fixup += 4;
} else { // 16-bit value
additive = *((uint16 *) fixup);
fixup += 2;
} // else
} // if
printf("Additive: %u\n", (uint) additive);
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break;
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} // case
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case 0x3:
printf("Internal entry table fixup record:\n");
printf("WRITE ME\n"); exit(1);
break;
} // switch
if (srctype & 0x20) { // source list
printf("Source offset list:");
for (uint8 i = 0; i < srclist_count; i++) {
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const sint16 val = *((sint16 *) fixup); fixup += 2;
printf(" %d", (int) val);
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} // for
} // if
printf("\n\n");
} // while
printf("\n");
} // for
} // for
printf("\n");
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printf("Resource table (%u entries):\n", (uint) lx->num_resource_table_entries);
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for (uint32 i = 0; i < lx->num_resource_table_entries; i++) {
const LxResourceTableEntry *rsrc = ((const LxResourceTableEntry *) (exe + lx->resource_table_offset)) + i;
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printf("%u:\n", (uint) i);
printf("Type ID: %u\n", (uint) rsrc->type_id);
printf("Name ID: %u\n", (uint) rsrc->name_id);
printf("Resource size: %u\n", (uint) rsrc->resource_size);
printf("Object: %u\n", (uint) rsrc->object);
printf("Offset: 0x%X\n", (uint) rsrc->offset);
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printf("\n");
} // for
printf("\n");
printf("Entry table:\n");
int bundleid = 1;
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int ordinal = 1;
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const uint8 *entryptr = exe + lx->entry_table_offset;
while (*entryptr) { /* end field has a value of zero. */
const uint8 numentries = *(entryptr++); /* number of entries in this bundle */
const uint8 bundletype = (*entryptr) & ~0x80;
const uint8 paramtypes = (*(entryptr++) & 0x80) ? 1 : 0;
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printf("Bundle %d (%u entries): ", bundleid, (uint) numentries);
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bundleid++;
if (paramtypes)
printf("[PARAMTYPES] ");
switch (bundletype) {
case 0x00:
printf("UNUSED\n");
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printf(" %u unused entries.\n\n", (uint) numentries);
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ordinal += numentries;
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break;
case 0x01:
printf("16BIT\n");
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printf(" Object number: %u\n", (uint) *((const uint16 *) entryptr)); entryptr += 2;
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for (uint8 i = 0; i < numentries; i++) {
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printf(" %d:\n", ordinal++);
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printf(" Flags:");
if (*entryptr & 0x1) printf(" EXPORTED");
printf("\n");
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printf(" Parameter word count: %u\n", (uint) ((*entryptr & 0xF8) >> 3)); entryptr++;
printf(" Offset: %u\n", (uint) *((const uint16 *) entryptr)); entryptr += 2;
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printf("\n");
}
break;
case 0x02:
printf("286CALLGATE\n");
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printf(" Object number: %u\n", (uint) *((const uint16 *) entryptr)); entryptr += 2;
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for (uint8 i = 0; i < numentries; i++) {
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printf(" %d:\n", ordinal++);
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printf(" Flags:");
if (*entryptr & 0x1) printf(" EXPORTED");
printf("\n");
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printf(" Parameter word count: %u\n", (uint) ((*entryptr & 0xF8) >> 3)); entryptr++;
printf(" Offset: %u\n", (uint) *((const uint16 *) entryptr)); entryptr += 2;
printf(" Callgate selector: %u\n", (uint) *((const uint16 *) entryptr)); entryptr += 2;
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printf("\n");
}
break;
case 0x03: printf("32BIT\n");
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printf(" Object number: %u\n", (uint) *((const uint16 *) entryptr)); entryptr += 2;
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for (uint8 i = 0; i < numentries; i++) {
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printf(" %d:\n", ordinal++);
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printf(" Flags:");
if (*entryptr & 0x1) printf(" EXPORTED");
printf("\n");
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printf(" Parameter word count: %u\n", (uint) ((*entryptr & 0xF8) >> 3)); entryptr++;
printf(" Offset: %u\n", (uint) *((const uint32 *) entryptr)); entryptr += 4;
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printf("\n");
}
break;
case 0x04: printf("FORWARDER\n"); break;
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printf(" Reserved field: %u\n", (uint) *((const uint16 *) entryptr)); entryptr += 2;
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for (uint8 i = 0; i < numentries; i++) {
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printf(" %d:\n", ordinal++);
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printf(" Flags:");
const int isordinal = (*entryptr & 0x1);
if (isordinal) printf(" IMPORTBYORDINAL");
printf("\n");
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printf(" Reserved for future use: %u\n", (uint) ((*entryptr & 0xF8) >> 3)); entryptr++;
printf(" Module ordinal number: %u\n", (uint) *((const uint16 *) entryptr)); entryptr += 2;
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if (isordinal) {
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printf(" Import ordinal number: %u\n", (uint) *((const uint32 *) entryptr)); entryptr += 4;
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} else {
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printf(" Import name offset: %u\n", (uint) *((const uint32 *) entryptr)); entryptr += 4;
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}
printf("\n");
}
break;
default:
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printf("UNKNOWN (%u)\n\n", (uint) bundletype);
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break; // !!! FIXME: what to do?
} // switch
} // while
printf("\n");
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printf("Module directives (%u entries):\n", (uint) lx->num_module_directives);
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const uint8 *dirptr = exe + lx->module_directives_offset;
for (uint32 i = 0; i < lx->num_module_directives; i++) {
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printf("%u:\n", (uint) i+1);
printf("Directive ID: %u\n", (uint) *((const uint16 *) dirptr)); dirptr += 2;
printf("Data size: %u\n", (uint) *((const uint16 *) dirptr)); dirptr += 2;
printf("Data offset: %u\n", (uint) *((const uint32 *) dirptr)); dirptr += 4;
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printf("\n");
// !!! FIXME: verify record directive table, etc, based on Directive ID
}
printf("\n");
if (lx->per_page_checksum_offset == 0) {
printf("No per-page checksums available.\n");
} else {
printf("!!! FIXME: look at per-page checksums!\n");
}
printf("\n");
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printf("Import modules (%u entries):\n", (uint) lx->num_import_mod_entries);
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const uint8 *import_modules_table = exe + lx->import_module_table_offset;
for (uint32 i = 0; i < lx->num_import_mod_entries; i++) {
char name[128];
const uint8 namelen = *(import_modules_table++);
// !!! FIXME: name can't be more than 127 chars, according to docs. Check this.
memcpy(name, import_modules_table, namelen);
import_modules_table += namelen;
name[namelen] = '\0';
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printf("%u: %s\n", (uint) i+1, name);
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const uint8 *name_table;
printf("Resident name table:\n");
name_table = exe + lx->resident_name_table_offset;
for (uint32 i = 0; *name_table; i++) {
const uint8 namelen = *(name_table++);
char name[256];
memcpy(name, name_table, namelen);
name[namelen] = '\0';
name_table += namelen;
const uint16 ordinal = *((const uint16 *) name_table); name_table += 2;
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printf("%u: '%s' (ordinal %u)\n", (uint) i, name, (uint) ordinal);
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} // for
printf("Non-resident name table:\n");
name_table = origexe + lx->non_resident_name_table_offset;
const uint8 *end_of_name_table = name_table + lx->non_resident_name_table_len;
for (uint32 i = 0; (name_table < end_of_name_table) && *name_table; i++) {
const uint8 namelen = *(name_table++);
char name[256];
memcpy(name, name_table, namelen);
name[namelen] = '\0';
name_table += namelen;
const uint16 ordinal = *((const uint16 *) name_table); name_table += 2;
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printf("%u: '%s' (ordinal %u)\n", (uint) i, name, (uint) ordinal);
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return 1;
} // parseLxExe
static int parseNeExe(const uint8 *origexe, const uint8 *exe)
{
const NeHeader *ne = (const NeHeader *) exe;
printf("NE (16-bit) executable.\n");
printf("Linker version: %u\n", (uint) ne->linker_version);
printf("Linker revision: %u\n", (uint) ne->linker_revision);
printf("Entry table offset: %u\n", (uint) ne->entry_table_offset);
printf("Entry table size: %u\n", (uint) ne->entry_table_size);
printf("CRC32: 0x%X\n", (uint) ne->crc32);
printf("Module flags:");
if (ne->module_flags == 0) printf(" NOAUTODATA");
if (ne->module_flags & 0x1) printf(" SINGLEDATA");
if (ne->module_flags & 0x2) printf(" MULTIPLEDATA");
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if (ne->module_flags & 0x4) printf(" FAMILYAPI");
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if (ne->module_flags & 0x2000) printf(" NOTLOADABLE");
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if (ne->module_flags & 0x4000) printf(" NONCONFORMING");
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if (ne->module_flags & 0x8000) printf(" LIBRARYMODULE");
printf("\n");
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printf("Application type: ");
switch ((ne->module_flags >> 8) & 0x3) {
case 0x0: printf("CONSOLE"); break;
case 0x1: printf("FULLSCREEN"); break;
case 0x2: printf("WINPMCOMPAT"); break;
case 0x3: printf("WINPMUSES"); break;
} // switch
printf("\n");
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printf("Automatic data segment: %u\n", (uint) ne->auto_data_segment);
printf("Dynamic heap size: %u\n", (uint) ne->dynamic_heap_size);
printf("Stack size: %u\n", (uint) ne->stack_size);
printf("Initial code address: %X:%X\n", (uint) ne->reg_cs, (uint) ne->reg_ip);
printf("Initial stack address: %X:%X\n", (uint) ne->reg_ss, (uint) ne->reg_sp);
printf("Number of segment table entries: %u\n", (uint) ne->num_segment_table_entries);
printf("Number of module reference table entries: %u\n", (uint) ne->num_module_ref_table_entries);
printf("Non-resident name table size: %u\n", (uint) ne->non_resident_name_table_size);
printf("Segment table offset: %u\n", (uint) ne->segment_table_offset);
printf("Resource table offset: %u\n", (uint) ne->resource_table_offset);
printf("Resident name table offset: %u\n", (uint) ne->resident_name_table_offset);
printf("Module reference table offset: %u\n", (uint) ne->module_reference_table_offset);
printf("Imported names table offset: %u\n", (uint) ne->imported_names_table_offset);
printf("Non-resident name table offset: %u\n", (uint) ne->non_resident_name_table_offset);
printf("Number of movable entries: %u\n", (uint) ne->num_movable_entries);
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printf("Sector alignment shift count: %u\n", (uint) ne->sector_alignment_shift_count);
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printf("Number of resource entries: %u\n", (uint) ne->num_resource_entries);
printf("Executable type: %u\n", (uint) ne->exe_type);
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printf("OS/2 flags:");
if (ne->os2_exe_flags == 0) {
printf(" (none)");
} else {
if (ne->os2_exe_flags & (1 << 0)) printf(" LONGFILENAMES");
if (ne->os2_exe_flags & (1 << 1)) printf(" PROTECTEDMODE");
if (ne->os2_exe_flags & (1 << 2)) printf(" PROPORTIONALFONTS");
if (ne->os2_exe_flags & (1 << 3)) printf(" GANGLOADAREA");
}
printf("\n");
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printf("\n");
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const uint32 sector_shift = ne->sector_alignment_shift_count;
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if (ne->num_segment_table_entries > 0) {
const uint32 total = (uint32) ne->num_segment_table_entries;
printf("Segment table (%u entries):\n", (uint) total);
const NeSegmentTableEntry *seg = (const NeSegmentTableEntry *) (exe + ne->segment_table_offset);
for (uint32 i = 0; i < total; i++, seg++) {
printf(" %u:\n", (uint) (i+1));
printf(" Logical-sector offset: %u", (uint) seg->offset);
if (seg->offset == 0) {
printf(" (no file data)\n");
} else {
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printf(" (byte position %u)\n", (uint) (((uint32) seg->offset) << sector_shift));
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}
printf(" Size: %u\n", (seg->size == 0) ? (uint) 0x10000 : (uint) seg->size);
printf(" Segment flags:");
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switch (seg->segment_flags & 0x3) {
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case 0: printf(" CODE"); break;
case 1: printf(" DATA"); break;
default: printf(" [UNKNOWN SEGMENT TYPE]"); break;
}
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if (seg->segment_flags & 0x4) printf(" REALMODE");
if (seg->segment_flags & 0x8) printf(" ITERATED");
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if (seg->segment_flags & 0x10) printf(" MOVABLE");
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if (seg->segment_flags & 0x20) printf(" SHAREABLE");
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if (seg->segment_flags & 0x40) printf(" PRELOAD");
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if (seg->segment_flags & 0x80) printf(" READONLY");
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if (seg->segment_flags & 0x100) printf(" RELOCINFO");
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if (seg->segment_flags & 0x200) printf(" DEBUGINFO");
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if (seg->segment_flags & 0xF000) printf(" DISCARD");
printf("\n");
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printf(" Discard priority: %u\n", (uint) ((seg->segment_flags >> 13) & 0x7));
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printf(" Minimum allocation: %u\n", (seg->minimum_allocation == 0) ? (uint) 0x10000 : (uint) seg->minimum_allocation);
if (seg->segment_flags & 0x100) { // has relocations (fixups)
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const uint8 *segptr = origexe + (((uint32) seg->offset) << sector_shift);
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const uint8 *fixupptr = segptr + (seg->size ? seg->size : 0xFFFF);
const uint32 num_fixups = (uint32) *((const uint16 *) fixupptr); fixupptr += 2;
printf(" Fixup records (%u entries):\n", (uint) num_fixups);
for (uint32 j = 0; j < num_fixups; j++) {
const uint8 srctype = *(fixupptr++);
const uint8 flags = *(fixupptr++);
uint32 srcchain_offset = (uint32) *((const uint16 *) fixupptr); fixupptr += 2;
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const uint8 *targetptr = fixupptr; fixupptr += 4;
const int additive = (flags & 0x4) != 0;
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printf(" %u:\n", (uint) j);
printf(" Source type: ");
switch (srctype & 0xF) {
case 0: printf("LOBYTE"); break;
case 2: printf("SEGMENT"); break;
case 3: printf("FAR_ADDR"); break;
case 5: printf("OFFSET"); break;
default: printf("[unknown type]"); break;
}
printf("\n");
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printf(" Fixup type:");
if (additive) printf(" ADDITIVE");
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switch (flags & 0x3) {
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case 0: {
const uint8 segment = targetptr[0];
//const uint8 reserved = targetptr[1];
const uint16 offset = *((const uint16 *) &targetptr[2]);
printf(" INTERNALREF (");
if (segment == 0xFF)
printf("movable segment, ordinal %u)", (uint) offset);
else
printf("segment %u, offset %u)", (uint) segment, (uint) offset);
}
break;
case 1: {
const uint16 module = ((const uint16 *) targetptr)[0];
const uint16 ordinal = ((const uint16 *) targetptr)[1];
printf(" IMPORTORDINAL (module %u, ordinal %u)", (uint) module, (uint) ordinal);
}
break;
case 2: {
const uint16 module = ((const uint16 *) targetptr)[0];
const uint16 offset = ((const uint16 *) targetptr)[1];
printf(" IMPORTNAME (module %u, name offset %u)", (uint) module, (uint) offset);
}
break;
case 3: {
const uint16 type = ((const uint16 *) targetptr)[0];
printf(" OSFIXUP (type %u)", (uint) type);
}
break;
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}
printf("\n");
if (additive) {
printf(" Additive source: %u", (uint) srcchain_offset);
} else {
printf(" Source chain:");
do {
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printf(" %X", (uint) srcchain_offset);
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srcchain_offset = *((const uint16 *) (segptr + srcchain_offset));
} while (srcchain_offset < seg->size);
}
printf("\n");
}
}
}
printf("\n");
}
if (ne->num_resource_entries > 0) {
const uint8 *ptr = exe + ne->resource_table_offset;
const uint32 total = (uint32) ne->num_resource_entries;
printf("Resources (%u entries):\n", (uint) total);
int idx = 0;
while (*((const uint16 *) ptr)) {
const uint16 typeid = *((const uint16 *) ptr); ptr += 2;
const uint32 num_resources = (uint32) *((const uint16 *) ptr); ptr += 2;
ptr += 4; // reserved.
for (uint32 j = 0; j < num_resources; j++) {
idx++;
printf(" %d:", idx);
printf(" Type ID: ");
if (typeid & 0x8000) {
printf("%u\n", (uint) (typeid & ~0x8000));
} else {
const uint8 *str = (exe + ne->resource_table_offset) + typeid;
const uint32 len = (uint32) *(str++);
printf("\"");
for (uint32 k = 0; k < len; k++, str++) {
printf("%c", (int) *str);
}
printf("\"\n");
}
const uint16 offset = *((const uint16 *) ptr); ptr += 2;
const uint16 size = *((const uint16 *) ptr); ptr += 2;
const uint16 flags = *((const uint16 *) ptr); ptr += 2;
const uint16 resourceid = *((const uint16 *) ptr); ptr += 2;
ptr += 4; // reserved.
printf(" Offset: %u\n", (uint) offset);
printf(" Size: %u\n", (uint) size);
printf(" Flags:");
if (flags & 0x10) printf(" MOVABLE");
if (flags & 0x20) printf(" PURE");
if (flags & 0x40) printf(" PRELOAD");
printf("\n");
printf(" Resource ID: ");
if (resourceid & 0x8000) {
printf("%u\n", (uint) (resourceid & ~0x8000));
} else {
const uint8 *str = (exe + ne->resource_table_offset) + resourceid;
const uint32 len = (uint32) *(str++);
printf("\"");
for (uint32 k = 0; k < len; k++, str++) {
printf("%c", (int) *str);
}
printf("\"\n");
}
}
}
printf("\n");
}
if (ne->resident_name_table_offset > 0) {
const uint8 *name_table = exe + ne->resident_name_table_offset;
if (*name_table) {
printf("Resident name table:\n");
for (uint32 i = 0; *name_table; i++) {
const uint8 namelen = *(name_table++);
char name[256];
memcpy(name, name_table, namelen);
name[namelen] = '\0';
name_table += namelen;
const uint16 ordinal = *((const uint16 *) name_table); name_table += 2;
printf(" %u: '%s' (ordinal %u)\n", (uint) i, name, (uint) ordinal);
}
printf("\n");
}
}
if (ne->non_resident_name_table_offset > 0) {
const uint8 *name_table = origexe + ne->non_resident_name_table_offset;
const uint8 *end_of_name_table = name_table + ne->non_resident_name_table_size;
if ((name_table < end_of_name_table) && *name_table) {
printf("Non-resident name table:\n");
for (uint32 i = 0; (name_table < end_of_name_table) && *name_table; i++) {
const uint8 namelen = *(name_table++);
char name[256];
memcpy(name, name_table, namelen);
name[namelen] = '\0';
name_table += namelen;
const uint16 ordinal = *((const uint16 *) name_table); name_table += 2;
printf(" %u: '%s' (ordinal %u)\n", (uint) i, name, (uint) ordinal);
}
printf("\n");
}
}
if (ne->num_module_ref_table_entries > 0) {
const uint32 total = (uint32) ne->num_module_ref_table_entries;
printf("Module reference table (%u entries):\n", (uint) total);
const uint16 *ptr = (const uint16 *) (exe + ne->module_reference_table_offset);
for (uint32 i = 0; i < total; i++, ptr++) {
const uint8 *name = (exe + ne->imported_names_table_offset) + *ptr;
const uint32 name_string_len = (uint32) *name;
name++;
807
printf(" %u: ", (uint) i+1);
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for (uint32 j = 0; j < name_string_len; j++, name++) {
printf("%c", (int) *name);
}
printf("\n");
}
printf("\n");
}
if (ne->entry_table_size > 0) {
const uint8 *ptr = exe + ne->entry_table_offset;
if (*ptr) {
printf("Entry table:\n");
uint32 ordinal = 1;
while (1) {
const uint8 bundled = *(ptr++);
if (!bundled) {
break;
}
const uint8 bundletype = *(ptr++);
switch (bundletype) {
case 0x00: // unused entries, to skip ordinals.
ordinal += bundled;
break;
case 0xFF: // Moveable segment entries.
for (uint32 i = 0; i < bundled; i++, ordinal++) {
const uint8 flags = *(ptr++);
const uint16 int3f = *((const uint16 *) ptr); ptr += 2;
const uint8 segment = *(ptr++);
const uint16 offset = *((const uint16 *) ptr); ptr += 2;
printf(" %u:\n", (uint) ordinal);
printf(" Flags: MOVABLE");
if (flags & 0x1) printf(" EXPORTED");
if (flags & 0x2) printf(" GLOBAL");
printf("\n");
printf(" Int3f: %X\n", (uint) int3f);
printf(" Segment: %u\n", (uint) segment);
printf(" Offset: %u\n", (uint) offset);
}
break;
default:
for (uint32 i = 0; i < bundled; i++, ordinal++) {
const uint8 flags = *(ptr++);
const uint16 offset = *((const uint16 *) ptr); ptr += 2;
printf(" %u:\n", (uint) ordinal);
printf(" Flags: FIXED");
if (flags & 0x1) printf(" EXPORTED");
if (flags & 0x2) printf(" GLOBAL");
printf("\n");
printf(" Segment: %u\n", (uint) bundletype);
printf(" Offset: %u\n", (uint) offset);
}
break;
}
}
printf("\n");
}
}
return 1;
} // parseNeExe
static void parseExe(const char *exefname, uint8 *exe, uint32 exelen)
{
int is_lx = 0;
printf("%s\n", exefname);
const uint8 *origexe = exe;
if (!sanityCheckExe(&exe, &exelen, &is_lx))
return;
if (is_lx) {
parseLxExe(origexe, exe);
} else {
parseNeExe(origexe, exe);
}
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} // parseExe
int main(int argc, char **argv)
{
if (argc != 2) {
fprintf(stderr, "USAGE: %s <program.exe>\n", argv[0]);
return 1;
}
const char *exefname = argv[1];
FILE *io = fopen(exefname, "rb");
if (!io) {
fprintf(stderr, "can't open '%s: %s'\n", exefname, strerror(errno));
return 2;
}
if (fseek(io, 0, SEEK_END) < 0) {
fprintf(stderr, "can't seek in '%s': %s\n", exefname, strerror(errno));
return 3;
}
const uint32 exelen = ftell(io);
uint8 *exe = (uint8 *) malloc(exelen);
if (!exe) {
fprintf(stderr, "Out of memory\n");
return 4;
}
rewind(io);
if (fread(exe, exelen, 1, io) != 1) {
fprintf(stderr, "read failure on '%s': %s\n", exefname, strerror(errno));
return 5;
}
fclose(io);
parseExe(exefname, exe, exelen);
free(exe);
return 0;
} // main
// end of lx_dump.c ...