/*****************************************************************************************
Copyright (c) 2002 The UbixOS Project
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are
permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list of
conditions, the following disclaimer and the list of authors. Redistributions in binary
form must reproduce the above copyright notice, this list of conditions, the following
disclaimer and the list of authors in the documentation and/or other materials provided
with the distribution. Neither the name of the UbixOS Project nor the names of its
contributors may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
$Log$
Revision 1.44 2004/04/13 16:16:44 reddawg
Changed our copyright, it is all now under a BSD-Style license
$Id$
*****************************************************************************************/
#include <ubixos/exec.h>
#include <ubixos/sched.h>
#include <ubixos/ld.h>
#include <vmm/vmm.h>
#include <lib/kmalloc.h>
#include <lib/kprintf.h>
uInt32 execThread(void (* tproc)(void),int stack,char *arg,char *descr) {
kTask_t * newProcess;
/* Find A New Thread */
newProcess = schedNewTask();
/* newProcess->oInfo.terminal = findConsole(0x0); */
/* Set All The Correct Thread Attributes */
newProcess->tss.back_link = 0x0;
newProcess->tss.esp0 = 0x0;
newProcess->tss.ss0 = 0x0;
newProcess->tss.esp1 = 0x0;
newProcess->tss.ss1 = 0x0;
newProcess->tss.esp2 = 0x0;
newProcess->tss.ss2 = 0x0;
newProcess->tss.cr3 = (unsigned int)kernelPageDirectory;
newProcess->tss.eip = (unsigned int)tproc;
newProcess->tss.eflags = 0x206;
newProcess->tss.esp = stack;
newProcess->tss.ebp = stack;
newProcess->tss.esi = 0x0;
newProcess->tss.edi = 0x0;
newProcess->tss.es = 0x10;
newProcess->tss.cs = 0x08;
newProcess->tss.ss = 0x10;
newProcess->tss.ds = 0x10;
newProcess->tss.fs = 0x10;
newProcess->tss.gs = 0x10;
newProcess->tss.ldt = 0x18;
newProcess->tss.trace_bitmap = 0x0000;
newProcess->tss.io_map = 0x8000;
newProcess->oInfo.vmStart = 0x6400000;
asm volatile(
"pusha \n"
"movl %%esp,%%ecx\n"
"movl %1,%%eax \n"
"movl %%eax,%%esp\n"
"pushl %%ebx\n"
"pushl %%ebx\n"
"pushl %%ebx\n"
"movl %%esp,%%eax\n"
"movl %%eax,%1 \n"
"movl %%ecx,%%esp\n"
"popa \n"
:
: "b" (arg),"m" (newProcess->tss.esp)
);
newProcess->state = READY;
/* Return */
return((uInt32)newProcess);
}
/************************************************************************
Function: void execFile(char *file);
Description: This Function Executes A Kile Into A New VM Space With Out
Having To Fork
Notes:
07/30/02 - I Have Made Some Heavy Changes To This As Well As Fixed A Few
Memory Leaks The Memory Allocated To Load The Binary Into Is
Now Unmapped So It Can Be Used Again And Not Held Onto Until
The Program Exits
07/30/02 - Now I Have To Make A Better Memory Allocator So We Can Set Up
The Freshly Allocated Pages With The Correct Permissions
************************************************************************/
void execFile(char *file,int argc,char **argv,int console) {
int i=0,x=0,eStart=0;
char *binarySpace = (char *)0x7C0000;
char *newLoc;
fileDescriptor *tmpFd = 0x0;
elfHeader *binaryHeader = (elfHeader *)0x7C0000;
elfProgramheader *programHeader;
/* Get A New Task For This Proccess */
_current = schedNewTask();
/* _current->oInfo.terminal = findConsole(console); */
_current->gid = 0;
_current->uid = 0;
/* Now We Must Create A Virtual Space For This Proccess To Run In */
_current->tss.cr3 = (uInt32)vmmCreateVirtualSpace(_current->id);
/* To Better Load This Application We Will Switch Over To Its VM Space */
asm(
"movl %0,%%eax \n"
"movl %%eax,%%cr3 \n"
: : "d" ((uLong *)(_current->tss.cr3))
);
/* Lets Find The File */
tmpFd = fopen(file,"r");
/* If We Dont Find the File Return */
if (!tmpFd) {
return;
}
/* Now We Must Allocate Memory To Load The Binary Into */
for (i=0;i<((tmpFd->size+4095)/4096);i++) {
vmmRemapPage(vmmFindFreePage(_current->id),(0x7C0000 + (0x1000 * i)));
}
/* Load The Binary Into Memory Byte For Byte I Should Find A Faster Way */
fread(binarySpace,tmpFd->size,1,tmpFd);
/*
for (i=0;feof(tmpFd) == 0;i++) {
binarySpace[i] = fgetc(tmpFd);
}
*/
/* Close The File */
fclose(tmpFd);
/* Set programHeader To Point To Loaded Binary So We Can Gather Info */
programHeader = (elfProgramheader *)(0x7C0000 + binaryHeader->ePhoff);
/* Loop Through The Header And Load Sections Which Need To Be Loaded */
for (i=0;i<binaryHeader->ePhnum;i++) {
newLoc = (char *)programHeader[i].phVaddr;
/*
Allocate Memory Im Going To Have To Make This Load Memory With Corrent
Settings so it helps us in the future
*/
for (x=0;x<=((programHeader[i].phMemsz & 0xFFFFF000)+0x1000);x+=0x1000) {
vmmRemapPage(vmmFindFreePage(_current->id),((programHeader[i].phVaddr & 0xFFFFF000) + x));
}
/* Now Copy The Binary To Its Correct Location */
for (x=0;x<programHeader[i].phFilesz;x++) {
newLoc[x] = binarySpace[(programHeader[i].phOffset+x)];
}
}
/* Set Virtual Memory Start */
_current->oInfo.vmStart = ((programHeader[i].phVaddr & 0xFFFFF000) + 0x1900000);
/* Get The Starting Point */
eStart = binaryHeader->eEntry;
/* Now That We Relocated The Binary We Can Unmap And Free Old Pages */
for (i=0;i<((tmpFd->size+4095)/4096);i++) {
vmmUnmapPage((0x7C0000 + (0x1000 * i)),0);
}
/* Now Lets Make A Clean Stack */
newLoc = (char *)0x5DB000;
vmmRemapPage(vmmFindFreePage(_current->id),0x5DC000);
vmmSetPageAttribute(0x5DC000,(pageDefault | pageStack));
vmmRemapPage(vmmFindFreePage(_current->id),0x5DB000);
vmmSetPageAttribute(0x5DB000,(pageDefault | pageStack));
vmmRemapPage(vmmFindFreePage(_current->id),0x5DA000);
vmmSetPageAttribute(0x5DA000,(pageDefault | pageStack));
vmmRemapPage(vmmFindFreePage(_current->id),0x5D9000);
vmmSetPageAttribute(0x5D9000,(pageDefault | pageStack));
i = 0x5DD000;
vmmRemapPage(vmmFindFreePage(_current->id),0x5D3000);
vmmSetPageAttribute(0x5D3000,(pageDefault | pageStack));
vmmRemapPage(vmmFindFreePage(_current->id),0x5D2000);
vmmSetPageAttribute(0x5D2000,(pageDefault | pageStack));
vmmRemapPage(vmmFindFreePage(_current->id),0x5D1000);
vmmSetPageAttribute(0x5D1000,(pageDefault | pageStack));
vmmRemapPage(vmmFindFreePage(_current->id),0x5D0000);
vmmSetPageAttribute(0x5D0000,(pageDefault | pageStack));
/* Set All The Proper Information For The Task */
_current->tss.back_link = 0x0;
_current->tss.esp0 = 0x5D4000;
_current->tss.ss0 = 0x10;
_current->tss.esp1 = 0x0;
_current->tss.ss1 = 0x0;
_current->tss.esp2 = 0x0;
_current->tss.ss2 = 0x0;
_current->tss.eip = (long)eStart;
_current->tss.eflags = 0x206;
_current->tss.esp = i-12;
_current->tss.ebp = i;
_current->tss.esi = 0x0;
_current->tss.edi = 0x0;
_current->tss.es = 0x30+3;
_current->tss.cs = 0x28+3;
_current->tss.ss = 0x30+3;
_current->tss.ds = 0x30+3;
_current->tss.fs = 0x30+3;
_current->tss.gs = 0x30+3;
/*
_current->tss.es = 0x10;
_current->tss.cs = 0x08;
_current->tss.ss = 0x10;
_current->tss.ds = 0x10;
_current->tss.fs = 0x10;
_current->tss.gs = 0x10;
*/
_current->tss.ldt = 0x18;
_current->tss.trace_bitmap = 0x0000;
_current->tss.io_map = 0x8000;
_current->state = READY;
/*
asm volatile(
"pusha \n"
"movl %%esp,%%edx\n"
"movl %2,%%ecx \n"
"movl %%ecx,%%esp\n"
"pushl $0x0\n"
"pushl $0x0\n"
"pushl $0x0\n"
"pushl $0x0\n"
"pushl %%ebx\n"
"pushl %%eax\n"
"movl %%esp,%%ecx\n"
"movl %%ecx,%2 \n"
"movl %%edx,%%esp\n"
"popa \n"
:
: "a" (argc), "b" (argv), "m" (_current->tss.esp)
);
*/
/* Switch Back To The Kernels VM Space */
asm(
"movl %0,%%eax \n"
"movl %%eax,%%cr3 \n"
: : "d" ((uLong *)(kernelPageDirectory))
);
/* Finally Return */
return;
}
/************************************************************************
Function: void sysExec();
Description: This Is The System Call To Execute A New Task
Notes:
04-22-03 - It Now Loads Sections Not The Full File
************************************************************************/
void sysExec(char *file,int argc,char **argv) {
int i = 0x0;
int x = 0x0;
uInt32 eStart = 0x0;
uInt32 *tmp = 0x0;
char *newLoc = 0x0;
char *linker = 0x0;
fileDescriptor *tmpFd = 0x0;
elfHeader *binaryHeader = 0x0;
elfProgramheader *programHeader = 0x0;
elfSectionheader *sectionHeader = 0x0;
elfDynamic *elfDynamicS = 0x0;
tmpFd = fopen(file,"r");
/* If We Dont Find the File Return */
if (tmpFd == 0x0) {
//*status = 0;
return;
}
if (tmpFd->perms == 0) {
//*status = -2;
kprintf("Exec Format Error: Binary File Not Executable.\n");
fclose(tmpFd);
return;
}
/* Load ELF Header */
binaryHeader = (elfHeader *)kmalloc(sizeof(elfHeader),_current->id);
fread(binaryHeader,sizeof(elfHeader),1,tmpFd);
/* Set sectionHeader To Point To Loaded Binary To We Can Gather Info */
/* sectionHeader = (elfSectionheader *)(0x7C0000 + binaryHeader->eShoff); */
/* Check If App Is A Real Application */
if ((binaryHeader->eIdent[1] != 'E') && (binaryHeader->eIdent[2] != 'L') && (binaryHeader->eIdent[3] != 'F')) {
//*status = -1;
kprintf("Exec Format Error: Binary File Not Executable.\n");
kfree(binaryHeader);
fclose(tmpFd);
return;
}
else if (binaryHeader->eType != 2) {
//*status = -2;
kprintf("Exec Format Error: Binary File Not Executable.\n");
kfree(binaryHeader);
fclose(tmpFd);
return;
}
else if (binaryHeader->eEntry == 0x300000) {
//*status = -2;
kprintf("Exec Format Error: Binary File Not Executable.\n");
kfree(binaryHeader);
fclose(tmpFd);
return;
}
/* Load The Program Header(s) */
programHeader = (elfProgramheader *)kmalloc(sizeof(elfProgramheader)*binaryHeader->ePhnum,_current->id);
fseek(tmpFd,binaryHeader->ePhoff,0);
fread(programHeader,(sizeof(elfProgramheader)*binaryHeader->ePhnum),1,tmpFd);
sectionHeader = (elfSectionheader *)kmalloc(sizeof(elfSectionheader)*binaryHeader->eShnum,_current->id);
fseek(tmpFd,binaryHeader->eShoff,0);
fread(sectionHeader,sizeof(elfSectionheader)*binaryHeader->eShnum,1,tmpFd);
/* Loop Through The Header And Load Sections Which Need To Be Loaded */
for (i=0;i<binaryHeader->ePhnum;i++) {
if (programHeader[i].phType == 1) {
newLoc = (char *)programHeader[i].phVaddr;
/*
Allocate Memory Im Going To Have To Make This Load Memory With Correct
Settings so it helps us in the future
*/
for (x=0;x<=((programHeader[i].phMemsz & 0xFFFFF000)+4095);x+=4096) {
vmmRemapPage(vmmFindFreePage(_current->id),((programHeader[i].phVaddr & 0xFFFFF000) + x));
}
_current->oInfo.vmStart = ((programHeader[i].phVaddr & 0xFFFFF000) + 0x1900000);
/* Now Load Section To Memory */
fseek(tmpFd,programHeader[i].phOffset,0);
fread(newLoc,programHeader[i].phFilesz,1,tmpFd);
}
else if (programHeader[i].phType == 2) {
newLoc = (char *)programHeader[i].phVaddr;
elfDynamicS = (elfDynamic *)programHeader[i].phVaddr;
fseek(tmpFd,programHeader[i].phOffset,0);
fread(newLoc,programHeader[i].phFilesz,1,tmpFd);
}
else if (programHeader[i].phType == 3) {
linker = (char *)kmalloc(programHeader[i].phMemsz,_current->id);
fseek(tmpFd,programHeader[i].phOffset,0);
fread(linker,programHeader[i].phFilesz,1,tmpFd);
//kprintf("Linker: [%s]\n",linker);
}
}
_current->oInfo.shstrtab = (char *)kmalloc(sectionHeader[binaryHeader->eShstrndx].shSize,_current->id);
fseek(tmpFd,sectionHeader[binaryHeader->eShstrndx].shOffset,0);
fread(_current->oInfo.shstrtab,sectionHeader[binaryHeader->eShstrndx].shSize,0,tmpFd);
for (i=0;i<12;i++) {
if (elfDynamicS[i].dynVal == 0x3) {
tmp = (uInt32 *)elfDynamicS[i].dynPtr;
tmp[2] = (uInt32) &ld;
}
}
_current->oInfo.sectionHeader = sectionHeader;
_current->oInfo.sectionCount = binaryHeader->eShnum;
_current->oInfo.stringSection = binaryHeader->eShstrndx;
/* Get The Starting Point */
eStart = binaryHeader->eEntry;
/* Now That We Relocated The Binary We Can Unmap And Free Header Info */
kfree(binaryHeader);
kfree(programHeader);
fclose(tmpFd);
/* Jump To Start Of New Binary */
asm volatile(
"pushl %1\n"
"pushl %%eax\n"
"call *%0\n"
:
: "g" (eStart),"g" (argv),"a" (argc)
);
}
/***
END
***/
