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Diffstat (limited to 'src/object/mdso_objgen_symfn.c')
-rw-r--r--src/object/mdso_objgen_symfn.c241
1 files changed, 0 insertions, 241 deletions
diff --git a/src/object/mdso_objgen_symfn.c b/src/object/mdso_objgen_symfn.c
deleted file mode 100644
index 6f4ac68..0000000
--- a/src/object/mdso_objgen_symfn.c
+++ /dev/null
@@ -1,241 +0,0 @@
-/****************************************************************/
-/* mdso: midipix dso scavenger */
-/* Copyright (C) 2015--2017 Z. Gilboa */
-/* Released under GPLv2 and GPLv3; see COPYING.MDSO. */
-/****************************************************************/
-
-#include <stdio.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-
-#include <mdso/mdso.h>
-#include "mdso_object_impl.h"
-#include "mdso_errinfo_impl.h"
-#include "perk_consts.h"
-#include "perk_structs.h"
-
-static const unsigned char jmp_code_i386[16] = {
- 0xff,0x25,
- 0x0,0x0,0x0,0x0,
- 0x90,0x90,
- 0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0
-};
-
-static const unsigned char jmp_code_amd64[16] = {
- 0xff,0x24,0x25,
- 0x0,0x0,0x0,0x0,
- 0x90,
- 0x90,0x90,0x90,0x90,0x90,0x90,0x90,0x90
-};
-
-struct mdso_symfn_code {
- unsigned char code[16];
-};
-
-struct mdso_symfn_object {
- struct pe_raw_coff_object_hdr hdr;
- struct pe_raw_sec_hdr sec[1];
- struct mdso_symfn_code cod[1];
- struct pe_raw_coff_reloc rel[1];
- struct pe_raw_coff_symbol sym[7];
- struct pe_raw_coff_strtbl cst;
-};
-
-int mdso_objgen_symfn(
- const struct mdso_driver_ctx * dctx,
- const char * sym,
- struct mdso_object * vobj)
-{
- struct mdso_symfn_object * symfn;
- struct pe_raw_coff_symbol * symrec;
- const unsigned char * code;
- void * addr;
- unsigned char * mark;
- unsigned char * mapsym;
- struct pe_raw_aux_rec_section * aux;
- size_t buflen;
- uint32_t symlen;
- uint32_t cstlen;
- uint32_t objlen;
- uint32_t aattr;
- uint32_t sattr;
- uint16_t oattr;
- uint16_t machine;
- uint16_t reltype;
- uint32_t relrva;
- uint32_t reloff;
- uint32_t symoff;
- uint32_t cstoff;
- uint32_t codoff;
- uint32_t datoff;
- uint32_t uscore;
-
- if ((buflen = strlen(sym)) > 1024*1024)
- return MDSO_CUSTOM_ERROR(dctx,MDSO_ERR_INVALID_DATA);
-
- symlen = (uint32_t)buflen;
- cstlen = (3 * symlen) + 32;
- objlen = sizeof(*symfn) + cstlen;
- uscore = !(dctx->cctx->drvflags & MDSO_DRIVER_QUAD_PTR);
-
- if (vobj->addr && (vobj->size < objlen))
- return MDSO_BUFFER_ERROR(dctx);
-
- if ((addr = vobj->addr)) {
- (void)0;
-
- } else {
- vobj->size = objlen;
- vobj->mapstrsnum = 1;
- vobj->mapstrslen = 1 + uscore + symlen;
-
- if (!vobj->name)
- return 0;
-
- else if (mdso_create_object(dctx,vobj) < 0)
- return MDSO_NESTED_ERROR(dctx);
- }
-
- symfn = (struct mdso_symfn_object *)vobj->addr;
-
- if (dctx->cctx->drvflags & MDSO_DRIVER_QUAD_PTR) {
- code = jmp_code_amd64;
- aattr = PE_IMAGE_SCN_ALIGN_16BYTES;
- machine = PE_IMAGE_FILE_MACHINE_AMD64;
- reltype = PE_IMAGE_REL_AMD64_ADDR32;
- relrva = 3;
- } else {
- code = jmp_code_i386;
- aattr = PE_IMAGE_SCN_ALIGN_4BYTES;
- machine = PE_IMAGE_FILE_MACHINE_I386;
- reltype = PE_IMAGE_REL_I386_DIR32;
- relrva = 2;
- }
-
- sattr = aattr;
- sattr |= PE_IMAGE_SCN_MEM_READ;
- sattr |= PE_IMAGE_SCN_MEM_EXECUTE;
- sattr |= PE_IMAGE_SCN_CNT_CODE;
-
- oattr = PE_IMAGE_FILE_LINE_NUMS_STRIPPED;
- reloff = offsetof(struct mdso_symfn_object,rel);
- symoff = offsetof(struct mdso_symfn_object,sym);
- codoff = offsetof(struct mdso_symfn_object,cod);
- cstoff = offsetof(struct pe_raw_coff_strtbl,cst_data);
- datoff = 0;
-
- /* coff object header */
- mdso_obj_write_short(symfn->hdr.cfh_machine,machine);
- mdso_obj_write_short(symfn->hdr.cfh_num_of_sections,1);
- mdso_obj_write_long(symfn->hdr.cfh_ptr_to_sym_tbl,symoff);
- mdso_obj_write_long(symfn->hdr.cfh_num_of_syms,7);
- mdso_obj_write_short(symfn->hdr.cfh_characteristics,oattr);
-
- /* .text section header */
- memcpy(symfn->sec[0].sh_name,".text",5);
- mdso_obj_write_long(symfn->sec[0].sh_size_of_raw_data,16);
- mdso_obj_write_long(symfn->sec[0].sh_ptr_to_raw_data,codoff);
- mdso_obj_write_long(symfn->sec[0].sh_ptr_to_relocs,reloff);
- mdso_obj_write_short(symfn->sec[0].sh_num_of_relocs,1);
- mdso_obj_write_long(symfn->sec[0].sh_characteristics,sattr);
-
- /* .text section content */
- memcpy(symfn->cod,code,16);
-
- /* .text relocation record */
- mdso_obj_write_long(symfn->rel[0].rel_sym,6);
- mdso_obj_write_long(symfn->rel[0].rel_rva,relrva);
- mdso_obj_write_short(symfn->rel[0].rel_type,reltype);
-
- /* coff string table */
- mdso_obj_write_long(symfn->cst.cst_size,cstlen);
-
- /* coff symbol table */
- symrec = symfn->sym;
- mark = symfn->cst.cst_data;
-
- /* coff symbol: .file */
- symrec[0].cs_storage_class[0] = PE_IMAGE_SYM_CLASS_FILE;
- symrec[0].cs_num_of_aux_symbols[0] = 1;
-
- mdso_obj_write_short(&symrec[0].cs_section_number[0],PE_IMAGE_SYM_DEBUG);
- mdso_obj_write_long(&symrec[1].cs_name[4],cstoff+datoff);
-
- memcpy(symrec[0].cs_name,".file",5);
- memcpy(&mark[0],".",1);
- memcpy(&mark[1],sym,symlen);
- memcpy(&mark[1+symlen],"_symfn.s",8);
-
- datoff += 10 + symlen;
- mark += 10 + symlen;
- symrec += 2;
-
- /* coff symbol: .text */
- symrec[0].cs_storage_class[0] = PE_IMAGE_SYM_CLASS_STATIC;
- symrec[0].cs_num_of_aux_symbols[0] = 1;
-
- mdso_obj_write_short(symrec[0].cs_section_number,1);
- memcpy(symrec[0].cs_name,".text",5);
-
- aux = (struct pe_raw_aux_rec_section *)&symrec[1];
- mdso_obj_write_long(aux->aux_size,relrva+4);
- mdso_obj_write_short(aux->aux_num_of_relocs,1);
-
- datoff += 0;
- mark += 0;
- symrec += 2;
-
- /* coff symbol: sym */
- mapsym = mark;
- symrec[0].cs_storage_class[0] = PE_IMAGE_SYM_CLASS_EXTERNAL;
- symrec[0].cs_num_of_aux_symbols[0] = 1;
-
- mdso_obj_write_short(symrec[0].cs_type,PE_IMAGE_SYM_DTYPE_FUNCTION<<8);
- mdso_obj_write_short(symrec[0].cs_section_number,1);
- mdso_obj_write_long(&symrec[0].cs_name[4],cstoff+datoff);
-
- if (dctx->cctx->drvflags & MDSO_DRIVER_QUAD_PTR) {
- memcpy(&mark[0],sym,symlen);
- } else {
- memcpy(&mark[1],sym,symlen);
- mark[0] = '_';
- datoff++;
- mark++;
- }
-
- datoff += 1 + symlen;
- mark += 1 + symlen;
- symrec += 2;
-
- /* archive symbol map */
- if (vobj->mapstrs)
- memcpy(vobj->mapstrs,mapsym,mark-mapsym);
-
- /* coff symbol: __imp_sym */
- symrec[0].cs_storage_class[0] = PE_IMAGE_SYM_CLASS_EXTERNAL;
- symrec[0].cs_num_of_aux_symbols[0] = 0;
-
- mdso_obj_write_short(symrec[0].cs_section_number,0);
- mdso_obj_write_long(&symrec[0].cs_name[4],cstoff+datoff);
-
- if (dctx->cctx->drvflags & MDSO_DRIVER_QUAD_PTR) {
- memcpy(&mark[0],"__imp_",6);
- memcpy(&mark[6],sym,symlen);
- } else {
- memcpy(&mark[0],"__imp_",6);
- memcpy(&mark[7],sym,symlen);
- mark[6] = '_';
- datoff++;
- mark++;
- }
-
- /* fs object unmap */
- if (!addr)
- munmap(vobj->addr,vobj->size);
-
- /* tada */
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-04 05:08:02 +0000