From 8535b67a7dbd5bb2e8c4e529c20ec8076b5cc27c Mon Sep 17 00:00:00 2001 From: midipix Date: Sun, 3 Feb 2019 23:21:54 -0500 Subject: Remove all bits pertaining to the obsolete distinction between code and data. --- src/object/mdso_objgen_symfn.c | 241 ----------------------------------------- 1 file changed, 241 deletions(-) delete mode 100644 src/object/mdso_objgen_symfn.c (limited to 'src/object') 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 -#include -#include -#include -#include -#include - -#include -#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; -} -- cgit v1.2.3