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csantifort |
/*----------------------------------------------------------------
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// //
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// elfsplitter.c //
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// //
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// This file is part of the Amber project //
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// http://www.opencores.org/project,amber //
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// //
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// Description //
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// Used by the boot loader to split an elf file and copy it //
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// to the correct memory locations ready for execution. //
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// //
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// Author(s): //
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// - Conor Santifort, csantifort.amber@gmail.com //
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// //
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//////////////////////////////////////////////////////////////////
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// //
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// Copyright (C) 2010 Authors and OPENCORES.ORG //
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// //
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// This source file may be used and distributed without //
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// restriction provided that this copyright statement is not //
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// removed from the file and that any derivative work contains //
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// the original copyright notice and the associated disclaimer. //
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// //
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// This source file is free software; you can redistribute it //
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// and/or modify it under the terms of the GNU Lesser General //
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// Public License as published by the Free Software Foundation; //
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// either version 2.1 of the License, or (at your option) any //
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// later version. //
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// //
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// This source is distributed in the hope that it will be //
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// useful, but WITHOUT ANY WARRANTY; without even the implied //
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// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //
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// PURPOSE. See the GNU Lesser General Public License for more //
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// details. //
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// //
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// You should have received a copy of the GNU Lesser General //
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// Public License along with this source; if not, download it //
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// from http://www.opencores.org/lgpl.shtml //
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// //
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----------------------------------------------------------------*/
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#include "amber_registers.h"
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#include "address_map.h"
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#include "utilities.h"
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#include "line-buffer.h"
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#include "timer.h"
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#include "packet.h"
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#include "telnet.h"
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#include "elfsplitter.h"
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int elfsplitter (char* inbuf, socket_t* socket)
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{
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unsigned int i, j, k;
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ElfHeader* elfHeader;
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Elf32_Shdr* elfSection;
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char *outbuf;
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unsigned int outP;
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int interrupt_table_written = 0;
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int interrupt_table_zero_written = 0;
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/* Create buffer to hold interrupt vector memory values
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Can't copy these into mem0 locations until ready to pass control
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t new program
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*/
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elf_mem0_g = malloc(sizeof(mem_buf_t));
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for(i=0;i<MEM_BUF_ENTRIES;i++)
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elf_mem0_g->entry[i].valid = 0;
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elfHeader=(ElfHeader*)inbuf;
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if (strncmp((char*)elfHeader->e_ident+1,"ELF",3)) {
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return(1);
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}
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if (elfHeader->e_machine != 40) {
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telnet_broadcast ("%s ERROR: ELF file not targetting correct processor type.\r\n",
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__func__);
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return(1);
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}
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for (i=0;i<elfHeader->e_shnum;++i) {
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elfSection=(Elf32_Shdr*)(inbuf+elfHeader->e_shoff+elfHeader->e_shentsize*i);
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/* section with non-zero bits, can be either text or data */
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if (elfSection->sh_type == SHT_PROGBITS && elfSection->sh_size != 0) {
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for (j=0; j<elfSection->sh_size; j++) {
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k = j + elfSection->sh_offset;
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outP = elfSection->sh_addr + j;
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/* debug */
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if (outP >= ADR_EXEC_BASE)
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telnet_broadcast("%s ERROR: 1 outP value 0x%08x\r\n",__func__, outP);
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else if (outP > MEM_BUF_ENTRIES)
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outbuf[outP] = inbuf[k];
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else {
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elf_mem0_g->entry[outP].valid = 1;
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elf_mem0_g->entry[outP].data = inbuf[k];
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interrupt_table_written = 1;
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}
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}
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}
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if (elfSection->sh_type == SHT_NOBITS && elfSection->sh_size != 0) {
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for (j=0; j<elfSection->sh_size; j++) {
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outP = j + elfSection->sh_addr;
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/* debug */
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if (outP >= ADR_EXEC_BASE)
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telnet_broadcast("%s ERROR: 2 outP value 0x%08x\r\n",__func__, outP);
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else if (outP > MEM_BUF_ENTRIES)
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outbuf[outP] = 0;
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else {
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elf_mem0_g->entry[outP].valid = 1;
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elf_mem0_g->entry[outP].data = 0;
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interrupt_table_zero_written = 1;
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}
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}
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}
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}
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/*
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if (interrupt_table_written)
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telnet_broadcast ("%s WARNING: Interrupt table writes\r\n",__func__);
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if (interrupt_table_zero_written)
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telnet_broadcast ("%s WARNING: Interrupt table ZERO writes\r\n",__func__);
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*/
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return 0;
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}
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