/* $NetBSD: file.c,v 1.16 2016/06/08 01:11:49 christos Exp $ */ /* * Copyright (c) 1995-96 Mats O Jansson. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "port.h" #ifndef lint __RCSID("$NetBSD: file.c,v 1.16 2016/06/08 01:11:49 christos Exp $"); #endif #include "os.h" #include "common.h" #include "file.h" #include "mopdef.h" #include #ifndef NOAOUT # if defined(__NetBSD__) || defined(__OpenBSD__) # include # endif # if defined(__bsdi__) # define NOAOUT # endif # if defined(__FreeBSD__) # include # endif # if !defined(MID_VAX) # define MID_VAX 140 # endif #endif /* NOAOUT */ #ifndef NOELF # if defined(__NetBSD__) # include # else # define NOELF # endif #endif /* NOELF */ #ifndef NOAOUT static int getCLBYTES(int); static int getMID(int, int); #endif const char * FileTypeName(mopd_imagetype type) { switch (type) { case IMAGE_TYPE_MOP: return ("MOP"); case IMAGE_TYPE_ELF32: return ("Elf32"); case IMAGE_TYPE_AOUT: return ("a.out"); } abort(); } void mopFilePutLX(u_char *buf, int idx, u_int32_t value, int cnt) { int i; for (i = 0; i < cnt; i++) { buf[idx+i] = value % 256; value = value / 256; } } void mopFilePutBX(u_char *buf, int idx, u_int32_t value, int cnt) { int i; for (i = 0; i < cnt; i++) { buf[idx+cnt-1-i] = value % 256; value = value / 256; } } u_int32_t mopFileGetLX(u_char *buf, int idx, int cnt) { u_int32_t ret = 0; int i; for (i = 0; i < cnt; i++) { int j = idx + cnt - 1 - i; if (j < 0) abort(); ret = ret * 256 + buf[j]; } return(ret); } u_int32_t mopFileGetBX(u_char *buf, int idx, int cnt) { u_int32_t ret = 0; int i; for (i = 0; i < cnt; i++) { int j = idx + i; if (j < 0) abort(); ret = ret * 256 + buf[j]; } return(ret); } void mopFileSwapX(u_char *buf, int idx, int cnt) { int i; u_char c; for (i = 0; i < (cnt / 2); i++) { c = buf[idx+i]; buf[idx+i] = buf[idx+cnt-1-i]; buf[idx+cnt-1-i] = c; } } int CheckMopFile(int fd) { u_char header[512]; short image_type; if (read(fd, header, 512) != 512) return(-1); (void)lseek(fd, (off_t) 0, SEEK_SET); image_type = (u_short)(header[IHD_W_ALIAS+1]*256 + header[IHD_W_ALIAS]); switch(image_type) { case IHD_C_NATIVE: /* Native mode image (VAX) */ case IHD_C_RSX: /* RSX image produced by TKB */ case IHD_C_BPA: /* BASIC plus analog */ case IHD_C_ALIAS: /* Alias */ case IHD_C_CLI: /* Image is CLI */ case IHD_C_PMAX: /* PMAX system image */ case IHD_C_ALPHA: /* ALPHA system image */ break; default: return(-1); } return(0); } int GetMopFileInfo(struct dllist *dl) { u_char header[512]; short image_type; u_int32_t load_addr, xfr_addr, isd, iha, hbcnt, isize; if (read(dl->ldfd, header, 512) != 512) return(-1); image_type = (u_short)(header[IHD_W_ALIAS+1]*256 + header[IHD_W_ALIAS]); switch(image_type) { case IHD_C_NATIVE: /* Native mode image (VAX) */ isd = (header[IHD_W_SIZE+1]*256 + header[IHD_W_SIZE]); iha = (header[IHD_W_ACTIVOFF+1]*256 + header[IHD_W_ACTIVOFF]); hbcnt = (header[IHD_B_HDRBLKCNT]); isize = (header[isd+ISD_W_PAGCNT+1]*256 + header[isd+ISD_W_PAGCNT]) * 512; load_addr = ((header[isd+ISD_V_VPN+1]*256 + header[isd+ISD_V_VPN]) & ISD_M_VPN) * 512; xfr_addr = (header[iha+IHA_L_TFRADR1+3]*0x1000000 + header[iha+IHA_L_TFRADR1+2]*0x10000 + header[iha+IHA_L_TFRADR1+1]*0x100 + header[iha+IHA_L_TFRADR1]) & 0x7fffffff; printf("Native Image (VAX)\n"); printf("Header Block Count: %d\n",hbcnt); printf("Image Size: %08x\n",isize); printf("Load Address: %08x\n",load_addr); printf("Transfer Address: %08x\n",xfr_addr); break; case IHD_C_RSX: /* RSX image produced by TKB */ hbcnt = header[L_BBLK+1]*256 + header[L_BBLK]; isize = (header[L_BLDZ+1]*256 + header[L_BLDZ]) * 64; load_addr = header[L_BSA+1]*256 + header[L_BSA]; xfr_addr = header[L_BXFR+1]*256 + header[L_BXFR]; printf("RSX Image\n"); printf("Header Block Count: %d\n",hbcnt); printf("Image Size: %08x\n",isize); printf("Load Address: %08x\n",load_addr); printf("Transfer Address: %08x\n",xfr_addr); break; case IHD_C_BPA: /* BASIC plus analog */ printf("BASIC-Plus Image, not supported\n"); return(-1); break; case IHD_C_ALIAS: /* Alias */ printf("Alias, not supported\n"); return(-1); break; case IHD_C_CLI: /* Image is CLI */ printf("CLI, not supported\n"); return(-1); break; case IHD_C_PMAX: /* PMAX system image */ isd = (header[IHD_W_SIZE+1]*256 + header[IHD_W_SIZE]); iha = (header[IHD_W_ACTIVOFF+1]*256 + header[IHD_W_ACTIVOFF]); hbcnt = (header[IHD_B_HDRBLKCNT]); isize = (header[isd+ISD_W_PAGCNT+1]*256 + header[isd+ISD_W_PAGCNT]) * 512; load_addr = (header[isd+ISD_V_VPN+1]*256 + header[isd+ISD_V_VPN]) * 512; xfr_addr = (header[iha+IHA_L_TFRADR1+3]*0x1000000 + header[iha+IHA_L_TFRADR1+2]*0x10000 + header[iha+IHA_L_TFRADR1+1]*0x100 + header[iha+IHA_L_TFRADR1]); printf("PMAX Image \n"); printf("Header Block Count: %d\n",hbcnt); printf("Image Size: %08x\n",isize); printf("Load Address: %08x\n",load_addr); printf("Transfer Address: %08x\n",xfr_addr); break; case IHD_C_ALPHA: /* ALPHA system image */ isd = (header[EIHD_L_ISDOFF+3]*0x1000000 + header[EIHD_L_ISDOFF+2]*0x10000 + header[EIHD_L_ISDOFF+1]*0x100 + header[EIHD_L_ISDOFF]); hbcnt = (header[EIHD_L_HDRBLKCNT+3]*0x1000000 + header[EIHD_L_HDRBLKCNT+2]*0x10000 + header[EIHD_L_HDRBLKCNT+1]*0x100 + header[EIHD_L_HDRBLKCNT]); isize = (header[isd+EISD_L_SECSIZE+3]*0x1000000 + header[isd+EISD_L_SECSIZE+2]*0x10000 + header[isd+EISD_L_SECSIZE+1]*0x100 + header[isd+EISD_L_SECSIZE]); load_addr = 0; xfr_addr = 0; printf("Alpha Image \n"); printf("Header Block Count: %d\n",hbcnt); printf("Image Size: %08x\n",isize); printf("Load Address: %08x\n",load_addr); printf("Transfer Address: %08x\n",xfr_addr); break; default: printf("Unknown Image (%d)\n",image_type); return(-1); } dl->image_type = IMAGE_TYPE_MOP; dl->loadaddr = load_addr; dl->xferaddr = xfr_addr; return(0); } #ifndef NOAOUT static int getMID(int old_mid, int new_mid) { int mid; mid = old_mid; switch (new_mid) { case MID_I386: mid = MID_I386; break; #ifdef MID_M68K case MID_M68K: mid = MID_M68K; break; #endif #ifdef MID_M68K4K case MID_M68K4K: mid = MID_M68K4K; break; #endif #ifdef MID_NS32532 case MID_NS32532: mid = MID_NS32532; break; #endif case MID_SPARC: mid = MID_SPARC; break; #ifdef MID_PMAX case MID_PMAX: mid = MID_PMAX; break; #endif #ifdef MID_VAX case MID_VAX: mid = MID_VAX; break; #endif #ifdef MID_ALPHA case MID_ALPHA: mid = MID_ALPHA; break; #endif #ifdef MID_MIPS case MID_MIPS: mid = MID_MIPS; break; #endif #ifdef MID_ARM6 case MID_ARM6: mid = MID_ARM6; break; #endif default: break; } return(mid); } static int getCLBYTES(int mid) { int clbytes; switch (mid) { #ifdef MID_VAX case MID_VAX: clbytes = 1024; break; #endif #ifdef MID_I386 case MID_I386: #endif #ifdef MID_M68K4K case MID_M68K4K: #endif #ifdef MID_NS32532 case MID_NS32532: #endif #ifdef MID_PMAX case MID_PMAX: #endif #ifdef MID_MIPS case MID_MIPS: #endif #ifdef MID_ARM6 case MID_ARM6: #endif #if defined(MID_I386) || defined(MID_M68K4K) || defined(MID_NS32532) || \ defined(MID_PMAX) || defined(MID_MIPS) || defined(MID_ARM6) clbytes = 4096; break; #endif #ifdef MID_M68K case MID_M68K: #endif #ifdef MID_ALPHA case MID_ALPHA: #endif #ifdef MID_SPARC case MID_SPARC: #endif #if defined(MID_M68K) || defined(MID_ALPHA) || defined(MID_SPARC) clbytes = 8192; break; #endif default: clbytes = 0; } return(clbytes); } #endif int CheckElfFile(int fd) { #ifdef NOELF return(-1); #else Elf32_Ehdr ehdr; (void)lseek(fd, (off_t) 0, SEEK_SET); if (read(fd, (char *)&ehdr, sizeof(ehdr)) != sizeof(ehdr)) return(-1); if (ehdr.e_ident[0] != ELFMAG0 || ehdr.e_ident[1] != ELFMAG1 || ehdr.e_ident[2] != ELFMAG2 || ehdr.e_ident[3] != ELFMAG3) return(-1); /* Must be Elf32... */ if (ehdr.e_ident[EI_CLASS] != ELFCLASS32) return(-1); return(0); #endif /* NOELF */ } int GetElfFileInfo(struct dllist *dl) { #ifdef NOELF return(-1); #else Elf32_Ehdr ehdr; Elf32_Phdr phdr; uint32_t e_machine, e_entry; uint32_t e_phoff, e_phentsize, e_phnum; int ei_data, i; (void)lseek(dl->ldfd, (off_t) 0, SEEK_SET); if (read(dl->ldfd, (char *)&ehdr, sizeof(ehdr)) != sizeof(ehdr)) return(-1); if (ehdr.e_ident[0] != ELFMAG0 || ehdr.e_ident[1] != ELFMAG1 || ehdr.e_ident[2] != ELFMAG2 || ehdr.e_ident[3] != ELFMAG3) return(-1); /* Must be Elf32... */ if (ehdr.e_ident[EI_CLASS] != ELFCLASS32) return(-1); ei_data = ehdr.e_ident[EI_DATA]; switch (ei_data) { case ELFDATA2LSB: e_machine = mopFileGetLX((u_char *) &ehdr, offsetof(Elf32_Ehdr, e_machine), sizeof(ehdr.e_machine)); e_entry = mopFileGetLX((u_char *) &ehdr, offsetof(Elf32_Ehdr, e_entry), sizeof(ehdr.e_entry)); e_phoff = mopFileGetLX((u_char *) &ehdr, offsetof(Elf32_Ehdr, e_phoff), sizeof(ehdr.e_phoff)); e_phentsize = mopFileGetLX((u_char *) &ehdr, offsetof(Elf32_Ehdr, e_phentsize), sizeof(ehdr.e_phentsize)); e_phnum = mopFileGetLX((u_char *) &ehdr, offsetof(Elf32_Ehdr, e_phnum), sizeof(ehdr.e_phnum)); break; case ELFDATA2MSB: e_machine = mopFileGetBX((u_char *) &ehdr, offsetof(Elf32_Ehdr, e_machine), sizeof(ehdr.e_machine)); e_entry = mopFileGetBX((u_char *) &ehdr, offsetof(Elf32_Ehdr, e_entry), sizeof(ehdr.e_entry)); e_phoff = mopFileGetBX((u_char *) &ehdr, offsetof(Elf32_Ehdr, e_phoff), sizeof(ehdr.e_phoff)); e_phentsize = mopFileGetBX((u_char *) &ehdr, offsetof(Elf32_Ehdr, e_phentsize), sizeof(ehdr.e_phentsize)); e_phnum = mopFileGetBX((u_char *) &ehdr, offsetof(Elf32_Ehdr, e_phnum), sizeof(ehdr.e_phnum)); break; default: return(-1); } dl->image_type = IMAGE_TYPE_ELF32; dl->loadaddr = 0; dl->xferaddr = e_entry; /* will relocate itself if necessary */ if (e_phnum > SEC_MAX) return(-1); dl->e_nsec = e_phnum; for (i = 0; i < dl->e_nsec; i++) { if (lseek(dl->ldfd, (off_t) e_phoff + (i * e_phentsize), SEEK_SET) == (off_t) -1) return(-1); if (read(dl->ldfd, (char *) &phdr, sizeof(phdr)) != sizeof(phdr)) return(-1); switch (ei_data) { case ELFDATA2LSB: dl->e_sections[i].s_foff = mopFileGetLX((u_char *) &phdr, offsetof(Elf32_Phdr, p_offset), sizeof(phdr.p_offset)); dl->e_sections[i].s_vaddr = mopFileGetLX((u_char *) &phdr, offsetof(Elf32_Phdr, p_vaddr), sizeof(phdr.p_vaddr)); dl->e_sections[i].s_fsize = mopFileGetLX((u_char *) &phdr, offsetof(Elf32_Phdr, p_filesz), sizeof(phdr.p_filesz)); dl->e_sections[i].s_msize = mopFileGetLX((u_char *) &phdr, offsetof(Elf32_Phdr, p_memsz), sizeof(phdr.p_memsz)); break; case ELFDATA2MSB: dl->e_sections[i].s_foff = mopFileGetBX((u_char *) &phdr, offsetof(Elf32_Phdr, p_offset), sizeof(phdr.p_offset)); dl->e_sections[i].s_vaddr = mopFileGetBX((u_char *) &phdr, offsetof(Elf32_Phdr, p_vaddr), sizeof(phdr.p_vaddr)); dl->e_sections[i].s_fsize = mopFileGetBX((u_char *) &phdr, offsetof(Elf32_Phdr, p_filesz), sizeof(phdr.p_filesz)); dl->e_sections[i].s_msize = mopFileGetBX((u_char *) &phdr, offsetof(Elf32_Phdr, p_memsz), sizeof(phdr.p_memsz)); break; default: return(-1); } } /* * In addition to padding between segments, this also * takes care of memsz > filesz. */ for (i = 0; i < dl->e_nsec - 1; i++) { dl->e_sections[i].s_pad = dl->e_sections[i + 1].s_vaddr - (dl->e_sections[i].s_vaddr + dl->e_sections[i].s_fsize); } dl->e_sections[dl->e_nsec - 1].s_pad = dl->e_sections[dl->e_nsec - 1].s_msize - dl->e_sections[dl->e_nsec - 1].s_fsize; /* * Now compute the logical offsets for each section. */ dl->e_sections[0].s_loff = 0; for (i = 1; i < dl->e_nsec; i++) { dl->e_sections[i].s_loff = dl->e_sections[i - 1].s_loff + dl->e_sections[i - 1].s_fsize + dl->e_sections[i - 1].s_pad; } /* Print info about the image. */ printf("Elf32 image ("); switch (e_machine) { #ifdef EM_VAX case EM_VAX: printf("VAX"); break; #endif default: printf("machine %d", e_machine); break; } printf(")\n"); printf("Transfer Address: %08x\n", dl->xferaddr); printf("Program Sections: %d\n", dl->e_nsec); for (i = 0; i < dl->e_nsec; i++) { printf(" S%d File Size: %08x\n", i, dl->e_sections[i].s_fsize); printf(" S%d Pad Size: %08x\n", i, dl->e_sections[i].s_pad); } dl->e_machine = e_machine; dl->e_curpos = 0; dl->e_cursec = 0; return(0); #endif /* NOELF */ } int CheckAOutFile(int fd) { #ifdef NOAOUT return(-1); #else struct exec ex, ex_swap; int mid = -1; if (read(fd, (char *)&ex, sizeof(ex)) != sizeof(ex)) return(-1); (void)lseek(fd, (off_t) 0, SEEK_SET); if (read(fd, (char *)&ex_swap, sizeof(ex_swap)) != sizeof(ex_swap)) return(-1); (void)lseek(fd, (off_t) 0, SEEK_SET); mid = getMID(mid, N_GETMID (ex)); if (mid == -1) { mid = getMID(mid, N_GETMID (ex_swap)); } if (mid != -1) { return(0); } else { return(-1); } #endif /* NOAOUT */ } int GetAOutFileInfo(struct dllist *dl) { #ifdef NOAOUT return(-1); #else struct exec ex, ex_swap; u_int32_t mid = -1; u_int32_t magic, clbytes, clofset; if (read(dl->ldfd, (char *)&ex, sizeof(ex)) != sizeof(ex)) return(-1); (void)lseek(dl->ldfd, (off_t) 0, SEEK_SET); if (read(dl->ldfd, (char *)&ex_swap, sizeof(ex_swap)) != sizeof(ex_swap)) return(-1); mopFileSwapX((u_char *)&ex_swap, 0, 4); mid = getMID(mid, N_GETMID (ex)); if (mid == (uint32_t)-1) { mid = getMID(mid, N_GETMID (ex_swap)); if (mid != (uint32_t)-1) { mopFileSwapX((u_char *)&ex, 0, 4); } } if (mid == (uint32_t)-1) { return(-1); } if (N_BADMAG (ex)) { return(-1); } switch (mid) { case MID_I386: #ifdef MID_NS32532 case MID_NS32532: #endif #ifdef MID_PMAX case MID_PMAX: #endif #ifdef MID_VAX case MID_VAX: #endif #ifdef MID_ALPHA case MID_ALPHA: #endif #ifdef MID_ARM6 case MID_ARM6: #endif ex.a_text = mopFileGetLX((u_char *)&ex_swap, 4, 4); ex.a_data = mopFileGetLX((u_char *)&ex_swap, 8, 4); ex.a_bss = mopFileGetLX((u_char *)&ex_swap, 12, 4); ex.a_syms = mopFileGetLX((u_char *)&ex_swap, 16, 4); ex.a_entry = mopFileGetLX((u_char *)&ex_swap, 20, 4); ex.a_trsize= mopFileGetLX((u_char *)&ex_swap, 24, 4); ex.a_drsize= mopFileGetLX((u_char *)&ex_swap, 28, 4); break; #ifdef MID_M68K case MID_M68K: #endif #ifdef MID_M68K4K case MID_M68K4K: #endif case MID_SPARC: #ifdef MID_MIPS case MID_MIPS: #endif ex.a_text = mopFileGetBX((u_char *)&ex_swap, 4, 4); ex.a_data = mopFileGetBX((u_char *)&ex_swap, 8, 4); ex.a_bss = mopFileGetBX((u_char *)&ex_swap, 12, 4); ex.a_syms = mopFileGetBX((u_char *)&ex_swap, 16, 4); ex.a_entry = mopFileGetBX((u_char *)&ex_swap, 20, 4); ex.a_trsize= mopFileGetBX((u_char *)&ex_swap, 24, 4); ex.a_drsize= mopFileGetBX((u_char *)&ex_swap, 28, 4); break; default: break; } printf("a.out image ("); switch (N_GETMID (ex)) { case MID_I386: printf("i386"); break; #ifdef MID_M68K case MID_M68K: printf("m68k"); break; #endif #ifdef MID_M68K4K case MID_M68K4K: printf("m68k 4k"); break; #endif #ifdef MID_NS32532 case MID_NS32532: printf("pc532"); break; #endif case MID_SPARC: printf("sparc"); break; #ifdef MID_PMAX case MID_PMAX: printf("pmax"); break; #endif #ifdef MID_VAX case MID_VAX: printf("vax"); break; #endif #ifdef MID_ALPHA case MID_ALPHA: printf("alpha"); break; #endif #ifdef MID_MIPS case MID_MIPS: printf("mips"); break; #endif #ifdef MID_ARM6 case MID_ARM6: printf("arm32"); break; #endif default: break; } printf(") Magic: "); switch (N_GETMAGIC (ex)) { case OMAGIC: printf("OMAGIC"); break; case NMAGIC: printf("NMAGIC"); break; case ZMAGIC: printf("ZMAGIC"); break; case QMAGIC: printf("QMAGIC"); break; default: printf("Unknown %ld", (long) N_GETMAGIC (ex)); } printf("\n"); printf("Size of text: %08lx\n", (long)ex.a_text); printf("Size of data: %08lx\n", (long)ex.a_data); printf("Size of bss: %08lx\n", (long)ex.a_bss); printf("Size of symbol tab: %08lx\n", (long)ex.a_syms); printf("Transfer Address: %08lx\n", (long)ex.a_entry); printf("Size of reloc text: %08lx\n", (long)ex.a_trsize); printf("Size of reloc data: %08lx\n", (long)ex.a_drsize); magic = N_GETMAGIC (ex); clbytes = getCLBYTES(mid); clofset = clbytes - 1; dl->image_type = IMAGE_TYPE_AOUT; dl->loadaddr = 0; dl->xferaddr = ex.a_entry; dl->a_text = ex.a_text; if (magic == ZMAGIC || magic == NMAGIC) { dl->a_text_fill = clbytes - (ex.a_text & clofset); if (dl->a_text_fill == clbytes) dl->a_text_fill = 0; } else dl->a_text_fill = 0; dl->a_data = ex.a_data; if (magic == ZMAGIC || magic == NMAGIC) { dl->a_data_fill = clbytes - (ex.a_data & clofset); if (dl->a_data_fill == clbytes) dl->a_data_fill = 0; } else dl->a_data_fill = 0; dl->a_bss = ex.a_bss; if (magic == ZMAGIC || magic == NMAGIC) { dl->a_bss_fill = clbytes - (ex.a_bss & clofset); if (dl->a_bss_fill == clbytes) dl->a_bss_fill = 0; } else { dl->a_bss_fill = clbytes - ((ex.a_text+ex.a_data+ex.a_bss) & clofset); if (dl->a_bss_fill == clbytes) dl->a_bss_fill = 0; } dl->a_mid = mid; return(0); #endif /* NOAOUT */ } int GetFileInfo(struct dllist *dl) { int error; error = CheckElfFile(dl->ldfd); if (error == 0) { error = GetElfFileInfo(dl); if (error != 0) { return(-1); } return (0); } error = CheckAOutFile(dl->ldfd); if (error == 0) { error = GetAOutFileInfo(dl); if (error != 0) { return(-1); } return (0); } error = CheckMopFile(dl->ldfd); if (error == 0) { error = GetMopFileInfo(dl); if (error != 0) { return(-1); } return (0); } /* Unknown file format. */ return(-1); } ssize_t mopFileRead(struct dllist *dlslot, u_char *buf) { ssize_t len, outlen; int bsz, sec; int32_t pos, notdone, total; uint32_t secoff; switch (dlslot->image_type) { case IMAGE_TYPE_MOP: len = read(dlslot->ldfd,buf,dlslot->dl_bsz); break; case IMAGE_TYPE_ELF32: sec = dlslot->e_cursec; /* * We're pretty simplistic here. We do only file-backed * or only zero-fill. */ /* Determine offset into section. */ secoff = dlslot->e_curpos - dlslot->e_sections[sec].s_loff; /* * If we're in the file-backed part of the section, * transmit some of the file. */ if (secoff < dlslot->e_sections[sec].s_fsize) { bsz = dlslot->e_sections[sec].s_fsize - secoff; if (bsz > dlslot->dl_bsz) bsz = dlslot->dl_bsz; if (lseek(dlslot->ldfd, dlslot->e_sections[sec].s_foff + secoff, SEEK_SET) == (off_t) -1) return (-1); len = read(dlslot->ldfd, buf, bsz); } /* * Otherwise, if we're in the zero-fill part of the * section, transmit some zeros. */ else if (secoff < (dlslot->e_sections[sec].s_fsize + dlslot->e_sections[sec].s_pad)) { bsz = dlslot->e_sections[sec].s_pad - (secoff - dlslot->e_sections[sec].s_fsize); if (bsz > dlslot->dl_bsz) bsz = dlslot->dl_bsz; memset(buf, 0, (len = bsz)); } /* * ...and if we haven't hit either of those cases, * that's the end of the image. */ else { return (0); } /* * Advance the logical image pointer. */ dlslot->e_curpos += bsz; if (dlslot->e_curpos >= (dlslot->e_sections[sec].s_loff + dlslot->e_sections[sec].s_fsize + dlslot->e_sections[sec].s_pad)) dlslot->e_cursec++; break; case IMAGE_TYPE_AOUT: bsz = dlslot->dl_bsz; pos = dlslot->a_lseek; len = 0; total = dlslot->a_text; if (pos < total) { notdone = total - pos; if (notdone <= bsz) { outlen = read(dlslot->ldfd,&buf[len],notdone); } else { outlen = read(dlslot->ldfd,&buf[len],bsz); } len = len + outlen; pos = pos + outlen; bsz = bsz - outlen; } total = total + dlslot->a_text_fill; if ((bsz > 0) && (pos < total)) { notdone = total - pos; if (notdone <= bsz) { outlen = notdone; } else { outlen = bsz; } memset(&buf[len], 0, outlen); len = len + outlen; pos = pos + outlen; bsz = bsz - outlen; } total = total + dlslot->a_data; if ((bsz > 0) && (pos < total)) { notdone = total - pos; if (notdone <= bsz) { outlen = read(dlslot->ldfd,&buf[len],notdone); } else { outlen = read(dlslot->ldfd,&buf[len],bsz); } len = len + outlen; pos = pos + outlen; bsz = bsz - outlen; } total = total + dlslot->a_data_fill; if ((bsz > 0) && (pos < total)) { notdone = total - pos; if (notdone <= bsz) { outlen = notdone; } else { outlen = bsz; } memset(&buf[len], 0, outlen); len = len + outlen; pos = pos + outlen; bsz = bsz - outlen; } total = total + dlslot->a_bss; if ((bsz > 0) && (pos < total)) { notdone = total - pos; if (notdone <= bsz) { outlen = notdone; } else { outlen = bsz; } memset(&buf[len], 0, outlen); len = len + outlen; pos = pos + outlen; bsz = bsz - outlen; } total = total + dlslot->a_bss_fill; if ((bsz > 0) && (pos < total)) { notdone = total - pos; if (notdone <= bsz) { outlen = notdone; } else { outlen = bsz; } memset(&buf[len], 0, outlen); len = len + outlen; pos = pos + outlen; bsz = bsz - outlen; } dlslot->a_lseek = pos; break; default: abort(); } return(len); }