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[/] [zipcpu/] [trunk/] [sim/] [cpp/] [zipelf.cpp] - Diff between revs 207 and 209

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////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
//
//
// Filename:    zipelf.cpp
// Filename:    zipelf.cpp
//
//
// Project:     Zip CPU -- a small, lightweight, RISC CPU soft core
// Project:     Zip CPU -- a small, lightweight, RISC CPU soft core
//
//
// Purpose:     
// Purpose:     
//
//
//
//
// Creator:     Dan Gisselquist, Ph.D.
// Creator:     Dan Gisselquist, Ph.D.
//              Gisselquist Technology, LLC
//              Gisselquist Technology, LLC
//
//
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
//
//
// Copyright (C) 2015-2017, Gisselquist Technology, LLC
// Copyright (C) 2015-2017, Gisselquist Technology, LLC
//
//
// This program is free software (firmware): you can redistribute it and/or
// This program is free software (firmware): you can redistribute it and/or
// modify it under the terms of  the GNU General Public License as published
// modify it under the terms of  the GNU General Public License as published
// by the Free Software Foundation, either version 3 of the License, or (at
// by the Free Software Foundation, either version 3 of the License, or (at
// your option) any later version.
// your option) any later version.
//
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
// for more details.
// for more details.
//
//
// You should have received a copy of the GNU General Public License along
// You should have received a copy of the GNU General Public License along
// with this program.  (It's in the $(ROOT)/doc directory.  Run make with no
// with this program.  (It's in the $(ROOT)/doc directory.  Run make with no
// target there if the PDF file isn't present.)  If not, see
// target there if the PDF file isn't present.)  If not, see
// <http://www.gnu.org/licenses/> for a copy.
// <http://www.gnu.org/licenses/> for a copy.
//
//
// License:     GPL, v3, as defined and found on www.gnu.org,
// License:     GPL, v3, as defined and found on www.gnu.org,
//              http://www.gnu.org/licenses/gpl.html
//              http://www.gnu.org/licenses/gpl.html
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
 
 
#include <stdlib.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdio.h>
#include <stdint.h>
#include <stdint.h>
#include <unistd.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <fcntl.h>
#include <libelf.h>
#include <libelf.h>
#include <assert.h>
#include <assert.h>
#include <gelf.h>
#include <gelf.h>
#include <string.h>
#include <string.h>
 
 
#include "zipelf.h"
#include "zipelf.h"
 
 
bool
bool
iself(const char *fname)
iself(const char *fname)
{
{
        FILE    *fp;
        FILE    *fp;
        bool    ret = true;
        bool    ret = true;
        fp = fopen(fname, "rb");
        fp = fopen(fname, "rb");
 
 
        if (!fp)        return false;
        if (!fp)        return false;
        if (0x7f != fgetc(fp))  ret = false;
        if (0x7f != fgetc(fp))  ret = false;
        if ('E'  != fgetc(fp))  ret = false;
        if ('E'  != fgetc(fp))  ret = false;
        if ('L'  != fgetc(fp))  ret = false;
        if ('L'  != fgetc(fp))  ret = false;
        if ('F'  != fgetc(fp))  ret = false;
        if ('F'  != fgetc(fp))  ret = false;
        fclose(fp);
        fclose(fp);
        return  ret;
        return  ret;
}
}
 
 
void    elfread(const char *fname, unsigned &entry, ELFSECTION **&sections)
void    elfread(const char *fname, unsigned &entry, ELFSECTION **&sections)
{
{
        Elf     *e;
        Elf     *e;
        int     fd, i;
        int     fd, i;
        size_t  n;
        size_t  n;
        char    *id;
        char    *id;
        Elf_Kind        ek;
        Elf_Kind        ek;
        GElf_Ehdr       ehdr;
        GElf_Ehdr       ehdr;
        GElf_Phdr       phdr;
        GElf_Phdr       phdr;
        const   bool    dbg = false;
        const   bool    dbg = false;
 
 
        if (elf_version(EV_CURRENT) == EV_NONE) {
        if (elf_version(EV_CURRENT) == EV_NONE) {
                fprintf(stderr, "ELF library initialization err, %s\n", elf_errmsg(-1));
                fprintf(stderr, "ELF library initialization err, %s\n", elf_errmsg(-1));
                perror("O/S Err:");
                perror("O/S Err:");
                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);
        } if ((fd = open(fname, O_RDONLY, 0)) < 0) {
        } if ((fd = open(fname, O_RDONLY, 0)) < 0) {
                fprintf(stderr, "Could not open %s\n", fname);
                fprintf(stderr, "Could not open %s\n", fname);
                perror("O/S Err:");
                perror("O/S Err:");
                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);
        } if ((e = elf_begin(fd, ELF_C_READ, NULL))==NULL) {
        } if ((e = elf_begin(fd, ELF_C_READ, NULL))==NULL) {
                fprintf(stderr, "Could not run elf_begin, %s\n", elf_errmsg(-1));
                fprintf(stderr, "Could not run elf_begin, %s\n", elf_errmsg(-1));
                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);
        }
        }
 
 
        ek = elf_kind(e);
        ek = elf_kind(e);
        if (ek == ELF_K_ELF) {
        if (ek == ELF_K_ELF) {
                ; // This is the kind of file we should expect
                ; // This is the kind of file we should expect
        } else if (ek == ELF_K_AR) {
        } else if (ek == ELF_K_AR) {
                fprintf(stderr, "Cannot run an archive!\n");
                fprintf(stderr, "Cannot run an archive!\n");
                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);
        } else if (ek == ELF_K_NONE) {
        } else if (ek == ELF_K_NONE) {
                ;
                ;
        } else {
        } else {
                fprintf(stderr, "Unexpected ELF file kind!\n");
                fprintf(stderr, "Unexpected ELF file kind!\n");
                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);
        }
        }
 
 
        if (gelf_getehdr(e, &ehdr) == NULL) {
        if (gelf_getehdr(e, &ehdr) == NULL) {
                fprintf(stderr, "getehdr() failed: %s\n", elf_errmsg(-1));
                fprintf(stderr, "getehdr() failed: %s\n", elf_errmsg(-1));
                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);
        } if ((i=gelf_getclass(e)) == ELFCLASSNONE) {
        } if ((i=gelf_getclass(e)) == ELFCLASSNONE) {
                fprintf(stderr, "getclass() failed: %s\n", elf_errmsg(-1));
                fprintf(stderr, "getclass() failed: %s\n", elf_errmsg(-1));
                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);
        } if ((id = elf_getident(e, NULL)) == NULL) {
        } if ((id = elf_getident(e, NULL)) == NULL) {
                fprintf(stderr, "getident() failed: %s\n", elf_errmsg(-1));
                fprintf(stderr, "getident() failed: %s\n", elf_errmsg(-1));
                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);
        } if (i != ELFCLASS32) {
        } if (i != ELFCLASS32) {
                fprintf(stderr, "This is a 64-bit ELF file, ZipCPU ELF files are all 32-bit\n");
                fprintf(stderr, "This is a 64-bit ELF file, ZipCPU ELF files are all 32-bit\n");
                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);
        }
        }
 
 
        if (dbg) {
        if (dbg) {
        fprintf(stderr,"    %-20s 0x%jx\n","e_type", (uintmax_t)ehdr.e_type);
        fprintf(stderr,"    %-20s 0x%jx\n","e_type", (uintmax_t)ehdr.e_type);
        fprintf(stderr,"    %-20s 0x%jx\n","e_machine", (uintmax_t)ehdr.e_machine);
        fprintf(stderr,"    %-20s 0x%jx\n","e_machine", (uintmax_t)ehdr.e_machine);
        fprintf(stderr,"    %-20s 0x%jx\n","e_version", (uintmax_t)ehdr.e_version);
        fprintf(stderr,"    %-20s 0x%jx\n","e_version", (uintmax_t)ehdr.e_version);
        fprintf(stderr,"    %-20s 0x%jx\n","e_entry",(uintmax_t)ehdr.e_entry);
        fprintf(stderr,"    %-20s 0x%jx\n","e_entry",(uintmax_t)ehdr.e_entry);
        fprintf(stderr,"    %-20s 0x%jx\n","e_phoff",(uintmax_t)ehdr.e_phoff);
        fprintf(stderr,"    %-20s 0x%jx\n","e_phoff",(uintmax_t)ehdr.e_phoff);
        fprintf(stderr,"    %-20s 0x%jx\n","e_shoff",(uintmax_t)ehdr.e_shoff);
        fprintf(stderr,"    %-20s 0x%jx\n","e_shoff",(uintmax_t)ehdr.e_shoff);
        fprintf(stderr,"    %-20s 0x%jx\n","e_flags",(uintmax_t)ehdr.e_flags);
        fprintf(stderr,"    %-20s 0x%jx\n","e_flags",(uintmax_t)ehdr.e_flags);
        fprintf(stderr,"    %-20s 0x%jx\n","e_ehsize",(uintmax_t)ehdr.e_ehsize);
        fprintf(stderr,"    %-20s 0x%jx\n","e_ehsize",(uintmax_t)ehdr.e_ehsize);
        fprintf(stderr,"    %-20s 0x%jx\n","e_phentsize", (uintmax_t)ehdr.e_phentsize);
        fprintf(stderr,"    %-20s 0x%jx\n","e_phentsize", (uintmax_t)ehdr.e_phentsize);
        fprintf(stderr,"    %-20s 0x%jx\n","e_shentsize", (uintmax_t)ehdr.e_shentsize);
        fprintf(stderr,"    %-20s 0x%jx\n","e_shentsize", (uintmax_t)ehdr.e_shentsize);
        fprintf(stderr,"\n");
        fprintf(stderr,"\n");
        }
        }
 
 
 
 
        // Check whether or not this is an ELF file for the ZipCPU ...
        // Check whether or not this is an ELF file for the ZipCPU ...
        if (ehdr.e_machine != 0x0dad1) {
        if (ehdr.e_machine != 0x0dad1) {
                fprintf(stderr, "This is not a ZipCPU/8 ELF file\n");
                fprintf(stderr, "This is not a ZipCPU/8 ELF file\n");
                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);
        }
        }
 
 
        // Get our entry address
        // Get our entry address
        entry = ehdr.e_entry;
        entry = ehdr.e_entry;
 
 
 
 
        // Now, let's go look at the program header
        // Now, let's go look at the program header
        if (elf_getphdrnum(e, &n) != 0) {
        if (elf_getphdrnum(e, &n) != 0) {
                fprintf(stderr, "elf_getphdrnum() failed: %s\n", elf_errmsg(-1));
                fprintf(stderr, "elf_getphdrnum() failed: %s\n", elf_errmsg(-1));
                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);
        }
        }
 
 
assert(n != 0);
assert(n != 0);
 
 
        unsigned total_octets = 0, current_offset=0, current_section=0;
        unsigned total_octets = 0, current_offset=0, current_section=0;
        for(i=0; i<(int)n; i++) {
        for(i=0; i<(int)n; i++) {
                total_octets += sizeof(ELFSECTION *)+sizeof(ELFSECTION);
                total_octets += sizeof(ELFSECTION *)+sizeof(ELFSECTION);
 
 
                if (gelf_getphdr(e, i, &phdr) != &phdr) {
                if (gelf_getphdr(e, i, &phdr) != &phdr) {
                        fprintf(stderr, "getphdr() failed: %s\n", elf_errmsg(-1));
                        fprintf(stderr, "getphdr() failed: %s\n", elf_errmsg(-1));
                        exit(EXIT_FAILURE);
                        exit(EXIT_FAILURE);
                }
                }
 
 
                if (dbg) {
                if (dbg) {
                fprintf(stderr, "    %-20s 0x%x\n", "p_type",   phdr.p_type);
                fprintf(stderr, "    %-20s 0x%x\n", "p_type",   phdr.p_type);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_offset", phdr.p_offset);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_offset", phdr.p_offset);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_vaddr",  phdr.p_vaddr);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_vaddr",  phdr.p_vaddr);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_paddr",  phdr.p_paddr);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_paddr",  phdr.p_paddr);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_filesz", phdr.p_filesz);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_filesz", phdr.p_filesz);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_memsz",  phdr.p_memsz);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_memsz",  phdr.p_memsz);
                fprintf(stderr, "    %-20s 0x%x [", "p_flags",  phdr.p_flags);
                fprintf(stderr, "    %-20s 0x%x [", "p_flags",  phdr.p_flags);
 
 
                if (phdr.p_flags & PF_X)        fprintf(stderr, " Execute");
                if (phdr.p_flags & PF_X)        fprintf(stderr, " Execute");
                if (phdr.p_flags & PF_R)        fprintf(stderr, " Read");
                if (phdr.p_flags & PF_R)        fprintf(stderr, " Read");
                if (phdr.p_flags & PF_W)        fprintf(stderr, " Write");
                if (phdr.p_flags & PF_W)        fprintf(stderr, " Write");
                fprintf(stderr, "]\n");
                fprintf(stderr, "]\n");
                fprintf(stderr, "    %-20s 0x%jx\n", "p_align", phdr.p_align);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_align", phdr.p_align);
                }
                }
 
 
                total_octets += phdr.p_filesz;
                total_octets += phdr.p_filesz;
        }
        }
 
 
        char    *d = (char *)malloc(total_octets + sizeof(ELFSECTION)+sizeof(ELFSECTION *));
        char    *d = (char *)malloc(total_octets + sizeof(ELFSECTION)+sizeof(ELFSECTION *));
        memset(d, 0, total_octets);
        memset(d, 0, total_octets);
 
 
        ELFSECTION **r = sections = (ELFSECTION **)d;
        ELFSECTION **r = sections = (ELFSECTION **)d;
        current_offset = (n+1)*sizeof(ELFSECTION *);
        current_offset = (n+1)*sizeof(ELFSECTION *);
        current_section = 0;
        current_section = 0;
 
 
        for(i=0; i<(int)n; i++) {
        for(i=0; i<(int)n; i++) {
                if (dbg) fprintf(stderr, "Working with &d[%d]\n", current_offset);
                if (dbg) fprintf(stderr, "Working with &d[%d]\n", current_offset);
                r[i] = (ELFSECTION *)(&d[current_offset]);
                r[i] = (ELFSECTION *)(&d[current_offset]);
 
 
                if (gelf_getphdr(e, i, &phdr) != &phdr) {
                if (gelf_getphdr(e, i, &phdr) != &phdr) {
                        fprintf(stderr, "getphdr() failed: %s\n", elf_errmsg(-1));
                        fprintf(stderr, "getphdr() failed: %s\n", elf_errmsg(-1));
                        exit(EXIT_FAILURE);
                        exit(EXIT_FAILURE);
                }
                }
 
 
                if (dbg) {
                if (dbg) {
                fprintf(stderr, "    %-20s 0x%jx\n", "p_offset", phdr.p_offset);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_offset", phdr.p_offset);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_vaddr",  phdr.p_vaddr);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_vaddr",  phdr.p_vaddr);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_paddr",  phdr.p_paddr);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_paddr",  phdr.p_paddr);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_filesz", phdr.p_filesz);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_filesz", phdr.p_filesz);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_memsz",  phdr.p_memsz);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_memsz",  phdr.p_memsz);
                fprintf(stderr, "    %-20s 0x%x [", "p_flags",  phdr.p_flags);
                fprintf(stderr, "    %-20s 0x%x [", "p_flags",  phdr.p_flags);
 
 
                if (phdr.p_flags & PF_X)        fprintf(stderr, " Execute");
                if (phdr.p_flags & PF_X)        fprintf(stderr, " Execute");
                if (phdr.p_flags & PF_R)        fprintf(stderr, " Read");
                if (phdr.p_flags & PF_R)        fprintf(stderr, " Read");
                if (phdr.p_flags & PF_W)        fprintf(stderr, " Write");
                if (phdr.p_flags & PF_W)        fprintf(stderr, " Write");
                fprintf(stderr, "]\n");
                fprintf(stderr, "]\n");
 
 
                fprintf(stderr, "    %-20s 0x%jx\n", "p_align", phdr.p_align);
                fprintf(stderr, "    %-20s 0x%jx\n", "p_align", phdr.p_align);
                }
                }
 
 
                current_section++;
                current_section++;
 
 
                r[i]->m_start = phdr.p_paddr;
                r[i]->m_start = phdr.p_paddr;
                r[i]->m_len   = phdr.p_filesz;
                r[i]->m_len   = phdr.p_filesz;
 
                r[i]->m_vaddr = phdr.p_vaddr;
 
 
                current_offset += phdr.p_filesz + sizeof(ELFSECTION);
                current_offset += phdr.p_filesz + sizeof(ELFSECTION);
 
 
                // Now, let's read in our section ...
                // Now, let's read in our section ...
                if (lseek(fd, phdr.p_offset, SEEK_SET) < 0) {
                if (lseek(fd, phdr.p_offset, SEEK_SET) < 0) {
                        fprintf(stderr, "Could not seek to file position %08lx\n", phdr.p_offset);
                        fprintf(stderr, "Could not seek to file position %08lx\n", (unsigned long)phdr.p_offset);
                        perror("O/S Err:");
                        perror("O/S Err:");
                        exit(EXIT_FAILURE);
                        exit(EXIT_FAILURE);
                } if (phdr.p_filesz > phdr.p_memsz)
                } if (phdr.p_filesz > phdr.p_memsz)
                        phdr.p_filesz = 0;
                        phdr.p_filesz = 0;
                if (read(fd, r[i]->m_data, phdr.p_filesz) != (int)phdr.p_filesz) {
                if (read(fd, r[i]->m_data, phdr.p_filesz) != (int)phdr.p_filesz) {
                        fprintf(stderr, "Didnt read entire section\n");
                        fprintf(stderr, "Didnt read entire section\n");
                        perror("O/S Err:");
                        perror("O/S Err:");
                        exit(EXIT_FAILURE);
                        exit(EXIT_FAILURE);
                }
                }
 
 
                /*
                /*
                // Next, we need to byte swap it from big to little endian
                // Next, we need to byte swap it from big to little endian
                for(unsigned j=0; j<r[i]->m_len; j++)
                for(unsigned j=0; j<r[i]->m_len; j++)
                        r[i]->m_data[j] = byteswap(r[i]->m_data[j]);
                        r[i]->m_data[j] = byteswap(r[i]->m_data[j]);
                */
                */
 
 
                if (dbg) for(unsigned j=0; j<r[i]->m_len; j++)
                if (dbg) for(unsigned j=0; j<r[i]->m_len; j++)
                        fprintf(stderr, "ADR[%04x] = %02x\n", r[i]->m_start+j,
                        fprintf(stderr, "ADR[%04x] = %02x\n", r[i]->m_start+j,
                                r[i]->m_data[j] & 0x0ff);
                                r[i]->m_data[j] & 0x0ff);
        }
        }
 
 
        r[i] = (ELFSECTION *)(&d[current_offset]);
        r[i] = (ELFSECTION *)(&d[current_offset]);
        r[current_section]->m_start = 0;
        r[current_section]->m_start = 0;
        r[current_section]->m_len   = 0;
        r[current_section]->m_len   = 0;
 
 
        elf_end(e);
        elf_end(e);
        close(fd);
        close(fd);
}
}
 
 
 
 

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