/*****************************************************************************************
Copyright (c) 2002-2004 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.
$Id$
*****************************************************************************************/
#include <ubixos/exec.h>
#include <ubixos/sched.h>
#include <ubixos/ld.h>
#include <ubixos/kpanic.h>
#include <ubixos/endtask.h>
#include <vmm/vmm.h>
#include <lib/kmalloc.h>
#include <lib/kprintf.h>
#include <lib/string.h>
#include <assert.h>
/*****************************************************************************************
Function: execThread(void (*)(void),int,char *);
Description: This function will create a thread from code in the current memory space
Notes:
05/19/04 - This does not work the way I want it to it still makes a copy of kernel space
so do not use out side of kernel space
*****************************************************************************************/
uInt32 execThread(void (* tproc)(void),uInt32 stack,char *arg) {
kTask_t * newProcess = 0x0;
/* Find A New Thread */
newProcess = schedNewTask();
assert(newProcess);
if (stack < 0x100000)
kpanic("exec: stack not in valid area: [0x%X]\n",stack);
/* Set All The Correct Thread Attributes */
/* Old
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;
*/
newProcess->cr3 = (uInt32)kernelPageDirectory;
newProcess->iframe->eip = (uInt32)tproc;
newProcess->iframe->flags = 0x206;
newProcess->iframe->esp = stack;
newProcess->iframe->ebp = stack;
newProcess->iframe->user_esp = stack;
newProcess->iframe->user_ss = 0x10;
newProcess->iframe->cs = 0x08;
/* Set up default stack for thread here filled with arg list 3 times */
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->iframe->esp)
);
/* Put new thread into the READY state */
sched_setStatus(newProcess->id,READY);
/* Return with the new process ID */
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 = 0x0;
int x = 0x0;
fileDescriptor *tmpFd = 0x0;
elfHeader *binaryHeader = 0x0;
elfProgramHeader *programHeader = 0x0;
/* Get A New Task For This Proccess */
_current = schedNewTask();
assert(_current);
_current->gid = 0x0;
_current->uid = 0x0;
_current->term = tty_find(console);
if (_current->term == 0x0)
kpanic("Error: invalid console\n");
/* Set tty ownership */
_current->term->owner = _current->id;
/* Now We Must Create A Virtual Space For This Proccess To Run In */
_current->cr3 = (uInt32)vmmCreateVirtualSpace(_current->id);
/* To Better Load This Application We Will Switch Over To Its VM Space */
asm volatile(
"movl %0,%%eax \n"
"movl %%eax,%%cr3 \n"
: : "d" ((uInt32 *)(_current->cr3))
);
/* Lets Find The File */
tmpFd = fopen(file,"r");
/* If We Dont Find the File Return */
if (tmpFd == 0x0) {
// kprintf("Exec Format Error: Binary File Not Executable.\n");
fclose(tmpFd);
return;
}
if (tmpFd->perms == 0x0) {
//kprintf("Exec Format Error: Binary File Not Executable.\n");
fclose(tmpFd);
return;
}
/* Load ELF Header */
binaryHeader = (elfHeader *)kmalloc(sizeof(elfHeader));
fread(binaryHeader,sizeof(elfHeader),1,tmpFd);
/* Check If App Is A Real Application */
if ((binaryHeader->eIdent[1] != 'E') && (binaryHeader->eIdent[2] != 'L') && (binaryHeader->eIdent[3] != 'F')) {
//kprintf("Exec Format Error: Binary File Not Executable.\n");
kfree(binaryHeader);
fclose(tmpFd);
return;
}
else if (binaryHeader->eType != 2) {
//kprintf("Exec Format Error: Binary File Not Executable.\n");
kfree(binaryHeader);
fclose(tmpFd);
return;
}
else if (binaryHeader->eEntry == 0x300000) {
//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);
fseek(tmpFd,binaryHeader->ePhoff,0);
fread(programHeader,(sizeof(elfProgramHeader)*binaryHeader->ePhnum),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) {
/*
Allocate Memory Im Going To Have To Make This Load Memory With Correct
Settings so it helps us in the future
*/
for (x = 0x0;x < (programHeader[i].phMemsz+4095);x += 0x1000) {
/* Make readonly and read/write !!! */
if (vmm_remapPage(vmmFindFreePage(_current->id),((programHeader[i].phVaddr & 0xFFFFF000) + x),PAGE_DEFAULT) == 0x0)
kpanic("Error: vmmFindFreePage Failed\n");
memset((void *)((programHeader[i].phVaddr & 0xFFFFF000) + x),0x0,0x1000);
}
_current->oInfo.vmStart = ((programHeader[i].phVaddr & 0xFFFFF000) + 0x1900000);
/* Now Load Section To Memory */
fseek(tmpFd,programHeader[i].phOffset,0);
fread((void *)programHeader[i].phVaddr,programHeader[i].phFilesz,1,tmpFd);
if ((programHeader[i].phFlags & 0x2) != 0x2) {
for (x = 0x0;x < (programHeader[i].phMemsz+4095);x += 0x1000) {
if ((vmm_setPageAttributes((programHeader[i].phVaddr & 0xFFFFF000) + x,PAGE_PRESENT | PAGE_USER)) != 0x0)
kpanic("Error: vmm_setPageAttributes failed, File: %s, Line: %i\n",__FILE__,__LINE__);
}
}
}
}
/* Set Virtual Memory Start */
_current->oInfo.vmStart = ((programHeader[i].phVaddr & 0xFFFFF000) + 0x1900000);
/* Task Stack 0x2000 bytes long */
vmm_remapPage(vmmFindFreePage(_current->id),0x5DC000,PAGE_DEFAULT | PAGE_STACK);
vmm_remapPage(vmmFindFreePage(_current->id),0x5DB000,PAGE_DEFAULT | PAGE_STACK);
/* Kernel Stack 0x2000 bytes long */
vmm_remapPage(vmmFindFreePage(_current->id),0x5CC000,KERNEL_PAGE_DEFAULT | PAGE_STACK);
vmm_remapPage(vmmFindFreePage(_current->id),0x5CB000,KERNEL_PAGE_DEFAULT | PAGE_STACK);
/* Set All The Proper Information For The Task */
/* old
_current->tss.back_link = 0x0;
_current->tss.esp0 = 0x5CC000;
_current->tss.ss0 = 0x10;
_current->tss.esp1 = 0x0;
_current->tss.ss1 = 0x0;
_current->tss.esp2 = 0x0;
_current->tss.ss2 = 0x0;
_current->tss.eip = (long)binaryHeader->eEntry;
_current->tss.eflags = 0x206;
_current->tss.esp = 0x5DD000-12;
_current->tss.ebp = 0x5DD000;
_current->tss.esi = 0x0;
_current->tss.edi = 0x0;
*/
/* Set these up to be ring 3 tasks */
/* old
_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.ldt = 0x18;
_current->tss.trace_bitmap = 0x0000;
_current->tss.io_map = 0x8000;
*/
_current->iframe->eip = (uInt32)binaryHeader->eEntry;
_current->iframe->flags = 0x206;
_current->iframe->esp = 0x5DD000 - 12;
_current->iframe->ebp = 0x5DD000;
_current->iframe->user_esp = 0x5DD000 - 12;
_current->iframe->user_ss = 0x30 + 3;
_current->iframe->cs = 0x28 + 3;
sched_setStatus(_current->id,READY);
kfree(binaryHeader);
kfree(programHeader);
fclose(tmpFd);
/* Switch Back To The Kernels VM Space */
asm volatile(
"movl %0,%%eax \n"
"movl %%eax,%%cr3 \n"
: : "d" ((uInt32 *)(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 *tmp = 0x0;
uInt32 ldAddr = 0x0;
fileDescriptor *tmpFd = 0x0;
elfHeader *binaryHeader = 0x0;
elfProgramHeader *programHeader = 0x0;
elfSectionHeader *sectionHeader = 0x0;
elfDynamic *elfDynamicS = 0x0;
tmpFd = fopen(file,"r");
_current->imageFd = tmpFd;
/* If We Dont Find the File Return */
if (tmpFd == 0x0) {
kprintf("Couldn't open file %s\n",file);
return;
}
if (tmpFd->perms == 0) {
//kprintf("Exec Format Error: Binary File Not Executable.\n");
fclose(tmpFd);
return;
}
/* Load ELF Header */
if ((binaryHeader = (elfHeader *)kmalloc(sizeof(elfHeader))) == 0x0)
endTask(_current->id);
fread(binaryHeader,sizeof(elfHeader),1,tmpFd);
/* Set sectionHeader To Point To Loaded Binary To We Can Gather Info */
/* Check If App Is A Real Application */
if ((binaryHeader->eIdent[1] != 'E') && (binaryHeader->eIdent[2] != 'L') && (binaryHeader->eIdent[3] != 'F')) {
//kprintf("Exec Format Error: Binary File Not Executable.\n");
kfree(binaryHeader);
fclose(tmpFd);
return;
}
else if (binaryHeader->eType != 2) {
//kprintf("Exec Format Error: Binary File Not Executable.\n");
kfree(binaryHeader);
fclose(tmpFd);
return;
}
else if (binaryHeader->eEntry == 0x300000) {
//kprintf("Exec Format Error: Binary File Not Executable.\n");
kfree(binaryHeader);
fclose(tmpFd);
return;
}
/* Load The Program Header(s) */
if ((programHeader = (elfProgramHeader *)kmalloc(sizeof(elfProgramHeader)*binaryHeader->ePhnum)) == 0x0)
endTask(_current->id);
assert(programHeader);
fseek(tmpFd,binaryHeader->ePhoff,0);
fread(programHeader,(sizeof(elfProgramHeader)*binaryHeader->ePhnum),1,tmpFd);
if ((sectionHeader = (elfSectionHeader *)kmalloc(sizeof(elfSectionHeader)*binaryHeader->eShnum)) == 0x0)
endTask(_current->id);
assert(sectionHeader);
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) {
/*
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+4095);x += 0x1000) {
/* Make readonly and read/write !!! */
if (vmm_remapPage(vmmFindFreePage(_current->id),((programHeader[i].phVaddr & 0xFFFFF000) + x),PAGE_DEFAULT) == 0x0)
kpanic("Error: vmmFindFreePage Failed\n");
memset((void *)((programHeader[i].phVaddr & 0xFFFFF000) + x),0x0,0x1000);
}
_current->oInfo.vmStart = ((programHeader[i].phVaddr & 0xFFFFF000) + 0x1900000);
/* Now Load Section To Memory */
fseek(tmpFd,programHeader[i].phOffset,0);
fread((void *)programHeader[i].phVaddr,programHeader[i].phFilesz,1,tmpFd);
if ((programHeader[i].phFlags & 0x2) != 0x2) {
for (x = 0x0;x < (programHeader[i].phMemsz+4095);x += 0x1000) {
if ((vmm_setPageAttributes((programHeader[i].phVaddr & 0xFFFFF000) + x,PAGE_PRESENT | PAGE_USER)) != 0x0)
kpanic("Error: vmm_setPageAttributes failed, File: %s,Line: %i\n",__FILE__,__LINE__);
}
}
}
else if (programHeader[i].phType == 2) {
//newLoc = (char *)programHeader[i].phVaddr;
elfDynamicS = (elfDynamic *)programHeader[i].phVaddr;
fseek(tmpFd,programHeader[i].phOffset,0);
fread((void *)programHeader[i].phVaddr,programHeader[i].phFilesz,1,tmpFd);
}
else if (programHeader[i].phType == 3) {
ldAddr = ldEnable();
}
}
if (elfDynamicS != 0x0) {
for (i=0;i<12;i++) {
if (elfDynamicS[i].dynVal == 0x3) {
tmp = (uInt32 *)elfDynamicS[i].dynPtr;
if (tmp == 0x0)
kpanic("tmp: NULL\n");
tmp[2] = (uInt32)ldAddr;
tmp[1] = (uInt32)tmpFd;
break;
}
}
}
/* Adjust iframe */
/* old
tmp = (uInt32 *)_current->tss.esp0 - 5;
tmp[0] = binaryHeader->eEntry;
tmp[3] = 0x5DD000-12;
*/
_current->iframe->eip = binaryHeader->eEntry;
_current->iframe->user_esp = 0x5DD000-12;
tmp = (uInt32 *)0x5DD000 - 2;
tmp[0] = argc;
tmp[1] = (uInt32)argv;
/* Now That We Relocated The Binary We Can Unmap And Free Header Info */
kfree(binaryHeader);
kfree(programHeader);
return;
}
/***
$Log$
Revision 1.62 2004/08/14 11:23:02 reddawg
Changes
Revision 1.61 2004/08/09 12:58:05 reddawg
let me know when you got the surce
Revision 1.60 2004/08/06 22:32:16 reddawg
Ubix Works Again
Revision 1.58 2004/08/04 08:17:57 reddawg
tty: we have primative ttys try f1-f5 so it is easier to use and debug
ubixos
Revision 1.57 2004/08/02 17:38:24 reddawg
Cleaned up self inflicted bug that messed up argc,argv
Revision 1.56 2004/07/28 17:07:25 reddawg
MPI: moved the syscalls
Revision 1.55 2004/07/28 15:05:43 reddawg
Major:
Pages now have strict security enforcement.
Many null dereferences have been resolved.
When apps loaded permissions set for pages rw and ro
Revision 1.54 2004/07/28 00:24:20 reddawg
removed debug code
Revision 1.53 2004/07/28 00:17:05 reddawg
Major:
Disconnected page 0x0 from the system... Unfortunately this broke many things
all of which have been fixed. This was good because nothing deferences NULL
any more.
Things affected:
malloc,kmalloc,getfreepage,getfreevirtualpage,pagefault,fork,exec,ld,ld.so,exec,file
Revision 1.52 2004/07/27 07:27:50 reddawg
chg: I was fooled thought we failed but it was a casting issue
Revision 1.51 2004/07/27 07:25:09 reddawg
chg: I should of made it print out stackAddr
Revision 1.50 2004/07/27 07:17:50 reddawg
chg: verify location of stack before building process
Revision 1.49 2004/07/24 23:04:44 reddawg
Changes... mark let me know if you fault at pid 185 when you type stress
Revision 1.48 2004/07/22 19:27:36 reddawg
Did i forget to commit
Revision 1.47 2004/07/22 19:18:14 reddawg
Fixed some pointer arithmatic which isn't causing any troubles marky mark who can't code rock hard
Revision 1.46 2004/07/22 18:46:16 reddawg
Fixed up exec.c
Revision 1.45 2004/07/22 17:32:25 reddawg
I broke it hopefully
Revision 1.44 2004/07/20 22:29:55 reddawg
assert: remade assert
Revision 1.43 2004/07/20 21:35:09 reddawg
Let me commit before we start to overlap
Revision 1.42 2004/07/18 05:24:15 reddawg
Fixens
Revision 1.41 2004/07/17 03:10:18 reddawg
Added asserts no problems thusfar
Revision 1.40 2004/06/28 23:12:58 reddawg
file format now container:/path/to/file
Revision 1.39 2004/06/18 15:29:38 reddawg
zero out memory
Revision 1.38 2004/06/18 15:18:04 reddawg
bug fixes: did some double checking on pointers and 0x0 out memory
Revision 1.37 2004/06/17 13:05:14 reddawg
dynamic linking: fixed int6 issue problem was multiple rel's
Revision 1.36 2004/06/17 12:28:56 reddawg
debug: show me the output after this is a tested
Revision 1.35 2004/06/17 02:58:49 reddawg
Cleaned Out Dead Code
Revision 1.34 2004/06/17 02:19:29 reddawg
Cleaning out dead code
Revision 1.32 2004/06/17 02:00:53 reddawg
Test
Revision 1.31 2004/06/17 01:57:52 reddawg
Test
Revision 1.30 2004/06/17 01:37:00 reddawg
TCA: test now
Revision 1.29 2004/06/16 17:46:42 reddawg
Cleaned Dead Code
Revision 1.28 2004/06/16 17:04:13 reddawg
ld.so: rest of the commit
Revision 1.25 2004/06/15 23:46:05 reddawg
Nig Nog
Revision 1.24 2004/06/14 13:16:26 reddawg
Works now 0x1000 line 272
Revision 1.21 2004/06/14 12:45:12 reddawg
Fixed!!!
Revision 1.20 2004/06/14 12:40:48 reddawg
Try now
Revision 1.18 2004/06/14 12:20:54 reddawg
notes: many bugs repaired and ld works 100% now.
Revision 1.17 2004/06/12 01:27:26 reddawg
shared objects: yes we almost fully support shared objects
Revision 1.16 2004/06/10 13:08:00 reddawg
Minor Bug Fixes
Revision 1.15 2004/06/04 13:29:56 reddawg
libc: modified mkdir(); interface
kpanic: kPanic(); now says kPanic: %s
system: now reboots when receives message for reboot
also when command start sde is received by system the STD is started
Revision 1.14 2004/06/01 00:04:53 reddawg
Try now mark
Revision 1.13 2004/05/25 22:44:08 reddawg
Removed debug code
Revision 1.12 2004/05/22 21:46:37 reddawg
Fixed some bugs
Revision 1.11 2004/05/22 02:10:42 reddawg
Added Code To Debug ISsue
Revision 1.10 2004/05/21 21:15:04 reddawg
Fixed a few bugs which prevented the system from loadin
Revision 1.9 2004/05/21 15:34:23 reddawg
Fixed a couple of typo
Revision 1.8 2004/05/21 15:32:06 reddawg
Changed the sys fileExec works it just loads sections needed now instead of fully should be a performance increase of about 40%
Revision 1.7 2004/05/19 04:31:12 reddawg
Fixed some typedef problems in exec
Revision 1.6 2004/05/19 04:07:42 reddawg
kmalloc(size,pid) no more it is no kmalloc(size); the way it should of been
Revision 1.5 2004/05/19 01:21:29 reddawg
Tweaked
Revision 1.4 2004/05/15 02:30:28 reddawg
Lots of changes
Revision 1.3 2004/05/02 03:19:51 reddawg
Added Spinlock Provision For SMP
Revision 1.2 2004/04/30 14:16:04 reddawg
Fixed all the datatypes to be consistant uInt8,uInt16,uInt32,Int8,Int16,Int32
Revision 1.1.1.1 2004/04/15 12:07:18 reddawg
UbixOS v1.0
Revision 1.44 2004/04/13 16:16:44 reddawg
Changed our copyright, it is all now under a BSD-Style license
END
***/
