axle

axle

zsim-nvmain整合
内核版本3.18
【下载地址】
解压目录下
1.修改install.sh （pin2.13网址不存在了） 或者删除掉pin的下载

PINVER=pin-2.14-71313-gcc.4.4.7-linux

(主要是下载nvmain)
2.按照 安装相关库

3.配置环境变量

vim env.sh

#!/bin/sh
PINPATH=/home/taya/zsim-nvmain/axle-zsim-nvmain-master/pin_kit
NVMAINPATH=/home/taya/zsim-nvmain/axle-zsim-nvmain-master/nvmain
ZSIMPATH=/home/taya/zsim-nvmain/axle-zsim-nvmain-master
BOOST=/usr/local
HDF5=/home/taya/zsim-nvmain/hdf5-1.8.0/hdf5
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$PINPATH/intel64/lib:$PINPATH/intel64/runtime:$PINPATH/intel64/lib:$PINPATH/intel64/lib-ext:$BOOST/lib:$HDF5/lib:/usr/local/gmp-4.3.2/lib:/usr/local/mpfr-2.4.2/lib:/usr/local/mpc-0.8.1/lib
INCLUDE=$INCLUDE:$HDF5/include
LIBRARY_PATH=$LIBRARY_PATH:$HDF5/lib
CPLUS_INCLUDE_PATH=$CPLUS_INCLUDE_PATH:$HDF5/include
export ZSIMPATH PINPATH NVMAINPATH LD_LIBRARY_PATH BOOST CPLUS_INCLUDE_PATH LIBRARY_PATH SIMPOINT_DIR

source env.sh

4编译 scons -j4

大部分遇到的问题，参考这里

有一部分编译syntax的错误在这里列出

vim SConstruct
将# Boost regex 部分改成 （原来的链接有问题）

# Boost regex
BOOST = os.environ["BOOST"]
include_path = os.environ['BOOST']+"/include"
lib_path = os.environ['BOOST']+"/lib"
env["CPPPATH"] += [include_path]
env["LIBPATH"] += [lib_path]
env["LIBS"] += ["boost_regex"]

将 env[“CXX” ] = os.environ[“CXX”]
env[“cc” ] = os.environ[“cc”] 改成
env[‘CXX’] = ‘g++’
env[‘CC’] = ‘g++’

src文件下 debug_zsim.cpp
-#include <libelf/gelf.h>
+#include <gelf.h>

5.运行过程问题

内核大于3.14版本会出现vdso找不到。因为3.14版本后的vdso 地址变了

首先到src目录 vim parse_vdso.cpp

/** parse_vdso.c: Linux reference vDSO parser* Written by Andrew Lutomirski, 2011.** This code is meant to be linked in to various programs that run on Linux.* As such, it is available with as few restrictions as possible.  This file* is licensed under the Creative Commons Zero License, version 1.0,* available at .0/legalcode** The vDSO is a regular ELF DSO that the kernel maps into user space when* it starts a program.  It works equally well in statically and dynamically* linked binaries.** This code is tested on x86_64.  In principle it should work on any 64-bit* architecture that has a vDSO.*/#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <elf.h>/** To use this vDSO parser, first call one of the vdso_init_* functions.* If you've already parsed auxv, then pass the value of AT_SYSINFO_EHDR* to vdso_init_from_sysinfo_ehdr.  Otherwise pass auxv to vdso_init_from_auxv.* Then call vdso_sym for each symbol you want.  For example, to look up* gettimeofday on x86_64, use:**     <some pointer> = vdso_sym("LINUX_2.6", "gettimeofday");* or*     <some pointer> = vdso_sym("LINUX_2.6", "__vdso_gettimeofday");** vdso_sym will return 0 if the symbol doesn't exist or if the init function* failed or was not called.  vdso_sym is a little slow, so its return value* should be cached.** vdso_sym is threadsafe; the init functions are not.** These are the prototypes:*/
extern void vdso_init_from_auxv(void *auxv);
extern void vdso_init_from_sysinfo_ehdr(uintptr_t base);
extern void *vdso_sym(const char *version, const char *name);/* And here's the code. */#ifndef __x86_64__
# error Not yet ported to non-x86_64 architectures
#endifstatic struct vdso_info
{bool valid;/* Load information */uintptr_t load_addr;uintptr_t load_offset;  /* load_addr - recorded vaddr *//* Symbol table */Elf64_Sym *symtab;const char *symstrings;Elf64_Word *bucket, *chain;Elf64_Word nbucket, nchain;/* Version table */Elf64_Versym *versym;Elf64_Verdef *verdef;
} vdso_info;/* Straight from the ELF specification. */
static unsigned long elf_hash(const char *name)
{unsigned long h = 0;while (*name){h = (h << 4) + *name++;unsigned long g = h & 0xf0000000;if (g)h ^= g >> 24;h &= ~g;}return h;
}void vdso_init_from_sysinfo_ehdr(uintptr_t base)
{size_t i;bool found_vaddr = false;vdso_info.valid = false;vdso_info.load_addr = base;Elf64_Ehdr *hdr = (Elf64_Ehdr*)base;Elf64_Phdr *pt = (Elf64_Phdr*)(vdso_info.load_addr + hdr->e_phoff);Elf64_Dyn *dyn = 0;/** We need two things from the segment table: the load offset* and the dynamic table.*/for (i = 0; i < hdr->e_phnum; i++){if (pt[i].p_type == PT_LOAD && !found_vaddr) {found_vaddr = true;vdso_info.load_offset =  base+ (uintptr_t)pt[i].p_offset- (uintptr_t)pt[i].p_vaddr;} else if (pt[i].p_type == PT_DYNAMIC) {dyn = (Elf64_Dyn*)(base + pt[i].p_offset);}}if (!found_vaddr || !dyn)return;  /* Failed *//** Fish out the useful bits of the dynamic table.*/Elf64_Word *hash = 0;vdso_info.symstrings = 0;vdso_info.symtab = 0;vdso_info.versym = 0;vdso_info.verdef = 0;for (i = 0; dyn[i].d_tag != DT_NULL; i++) {switch (dyn[i].d_tag) {case DT_STRTAB:vdso_info.symstrings = (const char *)((uintptr_t)dyn[i].d_un.d_ptr+ vdso_info.load_offset);break;case DT_SYMTAB:vdso_info.symtab = (Elf64_Sym *)((uintptr_t)dyn[i].d_un.d_ptr+ vdso_info.load_offset);break;case DT_HASH:hash = (Elf64_Word *)((uintptr_t)dyn[i].d_un.d_ptr+ vdso_info.load_offset);break;case DT_VERSYM:vdso_info.versym = (Elf64_Versym *)((uintptr_t)dyn[i].d_un.d_ptr+ vdso_info.load_offset);break;case DT_VERDEF:vdso_info.verdef = (Elf64_Verdef *)((uintptr_t)dyn[i].d_un.d_ptr+ vdso_info.load_offset);break;}}if (!vdso_info.symstrings || !vdso_info.symtab || !hash)return;  /* Failed */if (!vdso_info.verdef)vdso_info.versym = 0;/* Parse the hash table header. */vdso_info.nbucket = hash[0];vdso_info.nchain = hash[1];vdso_info.bucket = &hash[2];vdso_info.chain = &hash[vdso_info.nbucket + 2];/* That's all we need. */vdso_info.valid = true;
}static bool vdso_match_version(Elf64_Versym ver,const char *name, Elf64_Word hash)
{/** This is a helper function to check if the version indexed by* ver matches name (which hashes to hash).** The version definition table is a mess, and I don't know how* to do this in better than linear time without allocating memory* to build an index.  I also don't know why the table has* variable size entries in the first place.** For added fun, I can't find a comprehensible specification of how* to parse all the weird flags in the table.** So I just parse the whole table every time.*//* First step: find the version definition */ver &= 0x7fff;  /* Apparently bit 15 means "hidden" */Elf64_Verdef *def = vdso_info.verdef;while(true) {if ((def->vd_flags & VER_FLG_BASE) == 0&& (def->vd_ndx & 0x7fff) == ver)break;if (def->vd_next == 0)return false;  /* No definition. */def = (Elf64_Verdef *)((char *)def + def->vd_next);}/* Now figure out whether it matches. */Elf64_Verdaux *aux = (Elf64_Verdaux*)((char *)def + def->vd_aux);return def->vd_hash == hash&& !strcmp(name, vdso_info.symstrings + aux->vda_name);
}void *vdso_sym(const char *version, const char *name)
{unsigned long ver_hash;if (!vdso_info.valid)return 0;ver_hash = elf_hash(version);Elf64_Word chain = vdso_info.bucket[elf_hash(name) % vdso_info.nbucket];for (; chain != STN_UNDEF; chain = vdso_info.chain[chain]) {Elf64_Sym *sym = &vdso_info.symtab[chain];/* Check for a defined global or weak function w/ right name. */if (ELF64_ST_TYPE(sym->st_info) != STT_FUNC)continue;if (ELF64_ST_BIND(sym->st_info) != STB_GLOBAL &&ELF64_ST_BIND(sym->st_info) != STB_WEAK)continue;if (sym->st_shndx == SHN_UNDEF)continue;if (strcmp(name, vdso_info.symstrings + sym->st_name))continue;/* Check symbol version. */if (vdso_info.versym&& !vdso_match_version(vdso_info.versym[chain],version, ver_hash))continue;return (void *)(vdso_info.load_offset + sym->st_value);}return 0;
}void vdso_init_from_auxv(void *auxv)
{Elf64_auxv_t *elf_auxv = (Elf64_auxv_t *) auxv;for (int i = 0; elf_auxv[i].a_type != AT_NULL; i++){if (elf_auxv[i].a_type == AT_SYSINFO_EHDR) {vdso_init_from_sysinfo_ehdr(elf_auxv[i].a_un.a_val);return;}}vdso_info.valid = false;
}

然后修改src下的zsim.cpp

static uintptr_t vsyscallEnd;
static bool vsyscallWarned = false;- void VdsoInsertFunc(IMG vi, const char* fName, VdsoFunc func) {
-    ADDRINT baseAddr = IMG_LowAddress(vi);
-   RTN rtn = RTN_FindByName(vi, fName);
-    if (rtn == RTN_Invalid()) {
+// Helper function from parse_vsdo.cpp
+extern void vdso_init_from_sysinfo_ehdr(uintptr_t base);
+extern void *vdso_sym(const char *version, const char *name);+void VdsoInsertFunc(const char* fName, VdsoFunc func) {
+   ADDRINT vdsoFuncAddr = (ADDRINT) vdso_sym("LINUX_2.6", fName);
+    if (vdsoFuncAddr == 0) {warn("Did not find %s in vDSO", fName);} else {
-        ADDRINT rtnAddr = RTN_Address(rtn) - baseAddr + vdsoStart;
-        vdsoEntryMap[rtnAddr] = func;
+        vdsoEntryMap[vdsoFuncAddr] = func;}
}@@ -683,33 +685,21 @@ void VdsoInit() {........return;}~~---// Write it outstd::stringstream file_ss;file_ss << zinfo->outputDir << "/vdso.dso." << procIdx;const char* file = file_ss.str().c_str();FILE* vf = fopen(file, "w");fwrite(reinterpret_cast<void*>(vdso.start), 1, vdsoEnd-vdsoStart, vf);fclose(vf);// Load it and analyze itIMG vi = IMG_Open(file);if (!IMG_Valid(vi)) panic("Loaded vDSO not valid");---------~~ +   vdso_init_from_sysinfo_ehdr(vdsoStart);-    VdsoInsertFunc(vi, "clock_gettime", VF_CLOCK_GETTIME);
-    VdsoInsertFunc(vi, "__vdso_clock_gettime", VF_CLOCK_GETTIME);
+    VdsoInsertFunc("clock_gettime", VF_CLOCK_GETTIME);
+   VdsoInsertFunc("__vdso_clock_gettime", VF_CLOCK_GETTIME);-    VdsoInsertFunc(vi, "gettimeofday", VF_GETTIMEOFDAY);
-    VdsoInsertFunc(vi, "__vdso_gettimeofday", VF_GETTIMEOFDAY);
+    VdsoInsertFunc("gettimeofday", VF_GETTIMEOFDAY);
+   VdsoInsertFunc("__vdso_gettimeofday", VF_GETTIMEOFDAY);-    VdsoInsertFunc(vi, "time", VF_TIME);
-    VdsoInsertFunc(vi, "__vdso_time", VF_TIME);
+    VdsoInsertFunc("time", VF_TIME);
+   VdsoInsertFunc("__vdso_time", VF_TIME);-    VdsoInsertFunc(vi, "getcpu", VF_GETCPU);
-    VdsoInsertFunc(vi, "__vdso_getcpu", VF_GETCPU);
+    VdsoInsertFunc("getcpu", VF_GETCPU);
+    VdsoInsertFunc("__vdso_getcpu", VF_GETCPU);info("vDSO info initialized");
-    IMG_Close(vi);
-    remove(file);Section vsyscall = FindSection("vsyscall");vsyscallStart = vsyscall.start;

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