From d9170d6002c684acdfca1ba124dba2235081b578 Mon Sep 17 00:00:00 2001
From: Andrew Waterman <waterman@s141.Millennium.Berkeley.EDU>
Date: Mon, 9 Aug 2010 17:04:30 -0700
Subject: [PATCH] [sim] removed unused elf loader

---
 riscv/load_elf.cc | 48 -----------------------------------------------
 riscv/load_elf.h  | 13 -------------
 riscv/riscv.mk.in |  2 --
 riscv/sim.cc      | 25 ------------------------
 riscv/sim.h       |  1 -
 5 files changed, 89 deletions(-)
 delete mode 100644 riscv/load_elf.cc
 delete mode 100644 riscv/load_elf.h

diff --git a/riscv/load_elf.cc b/riscv/load_elf.cc
deleted file mode 100644
index 0161e42..0000000
--- a/riscv/load_elf.cc
+++ /dev/null
@@ -1,48 +0,0 @@
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <sys/mman.h>
-#include <elf.h>
-#include "common.h"
-#include "load_elf.h"
-
-void load_elf(const char* buf, size_t size, loader_t* loader)
-{
-  demand(size >= sizeof(Elf64_Ehdr), "truncated ELF!");
-  const Elf64_Ehdr* eh = (const Elf64_Ehdr*)buf;
-
-  const uint32_t* magic = (const uint32_t*)eh->e_ident;
-  demand(*magic == *(const uint32_t*)ELFMAG, "not a host-endian ELF!");
-  demand(size >= eh->e_phoff + eh->e_phnum*sizeof(Elf64_Phdr), "bad ELF!");
-  const Elf64_Phdr* phs = (const Elf64_Phdr*)(buf+eh->e_phoff);
-
-  for(int i = 0; i < eh->e_phnum; i++)
-  {
-    const Elf64_Phdr* ph = &phs[i];
-    if(ph->p_type == SHT_PROGBITS && ph->p_memsz)
-    {
-      demand(size >= ph->p_offset + ph->p_filesz, "truncated ELF!");
-      demand(ph->p_memsz >= ph->p_filesz, "bad ELF!");
-
-      loader->write(ph->p_vaddr, ph->p_filesz, buf + ph->p_offset);
-      loader->write(ph->p_vaddr + ph->p_filesz, ph->p_memsz - ph->p_filesz);
-
-      printf("%d\n", ph->p_vaddr);
-    }
-  }
-}
-
-void load_elf(const char* fn, loader_t* loader)
-{
-  int fd = open(fn, O_RDONLY);
-  demand(fd != -1, "couldn't open %s", fn);
-
-  struct stat s;
-  demand(fstat(fd,&s) != -1, "couldn't stat %s", fn);
-
-  char* addr = (char*)mmap(NULL, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
-  demand(addr != MAP_FAILED, "couldn't mmap %s", fn);
-
-  close(fd);
-
-  load_elf(addr, s.st_size, loader);
-}
diff --git a/riscv/load_elf.h b/riscv/load_elf.h
deleted file mode 100644
index 8371591..0000000
--- a/riscv/load_elf.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef _RISCV_LOAD_ELF_H
-#define _RISCV_LOAD_ELF_H
-
-class loader_t
-{
-public:
-  virtual void write(size_t addr, size_t bytes, const void* src = NULL) = 0;
-};
-
-void load_elf(const char* buf, size_t size, loader_t* loader);
-void load_elf(const char* fn, loader_t* loader);
-
-#endif
diff --git a/riscv/riscv.mk.in b/riscv/riscv.mk.in
index 54fc380..bd806cc 100644
--- a/riscv/riscv.mk.in
+++ b/riscv/riscv.mk.in
@@ -5,7 +5,6 @@ riscv_hdrs = \
 	common.h \
 	decode.h \
 	execute.h \
-	load_elf.h \
 	mmu.h \
 	processor.h \
 	sim.h \
@@ -14,7 +13,6 @@ riscv_hdrs = \
 
 riscv_srcs = \
     applink.cc \
-	load_elf.cc \
 	processor.cc \
 	sim.cc \
 	trap.cc \
diff --git a/riscv/sim.cc b/riscv/sim.cc
index 50fa899..668d23a 100644
--- a/riscv/sim.cc
+++ b/riscv/sim.cc
@@ -1,30 +1,10 @@
 #include "sim.h"
 #include "applink.h"
 #include "common.h"
-#include "load_elf.h"
 #include <sys/mman.h>
 #include <map>
 #include <iostream>
 
-class memory_t : public loader_t
-{
-public:
-  memory_t(char* _mem, size_t _size) : mem(_mem), size(_size) {}
-
-  void write(size_t addr, size_t bytes, const void* src = NULL)
-  {
-    demand(addr < size && addr + bytes <= size, "out of bounds!");
-    if(src)
-      memcpy(mem+addr, src, bytes);
-    else
-      memset(mem+addr, 0, bytes);
-  }
-
-private:
-  char* mem;
-  size_t size;
-};
-
 sim_t::sim_t(int _nprocs, size_t _memsz, appserver_link_t* _applink)
   : applink(_applink),
     memsz(_memsz),
@@ -43,11 +23,6 @@ sim_t::~sim_t()
 {
 }
 
-void sim_t::load_elf(const char* fn)
-{
-  memory_t loader(mem, memsz);
-  ::load_elf(fn,&loader);
-}
 void sim_t::set_tohost(reg_t val)
 {
   fromhost = 0;
diff --git a/riscv/sim.h b/riscv/sim.h
index 59795d9..c8faa0c 100644
--- a/riscv/sim.h
+++ b/riscv/sim.h
@@ -14,7 +14,6 @@ class sim_t
 public:
   sim_t(int _nprocs, size_t _memsz, appserver_link_t* _applink);
   ~sim_t();
-  void load_elf(const char* fn);
   void run(bool debug);
 
   void set_tohost(reg_t val);
-- 
2.30.2