/*****************************************************************************************
Copyright (c) 2002-2004, 2016 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 F
ITNESS 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: i386_exec.c 240 2016-01-24 03:14:50Z reddawg $
*****************************************************************************************/
#include <ubixos/exec.h>
#include <sys/elf.h>
#include <sys/gdt.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>
#define STACK_ADDR 0xC800000
#define AT_NULL 0 /* Terminates the vector. */
#define AT_IGNORE 1 /* Ignored entry. */
#define AT_EXECFD 2 /* File descriptor of program to load. */
#define AT_PHDR 3 /* Program header of program already loaded. */
#define AT_PHENT 4 /* Size of each program header entry. */
#define AT_PHNUM 5 /* Number of program header entries. */
#define AT_PAGESZ 6 /* Page size in bytes. */
#define AT_BASE 7 /* Interpreter's base address. */
#define AT_FLAGS 8 /* Flags (unused for i386). */
#define AT_ENTRY 9 /* Where interpreter should transfer control. */
//#define AUXARGS_ENTRY(pos, id, val) {memcpy((void *)pos++,(void *)id,sizeof(long)); memcpy((void *)pos++,(void *)val,sizeof(long));}
#define AUXARGS_ENTRY(pos, id, val) {*pos = id;pos++; *pos = val;pos++;}
//#define PT_GNU_STACK 0x6474e551
/* Temp Holder */
int sys_execve( struct thread *td, struct sys_execve_args *args ) {
int ret = sys_exec( td, args->fname, args->argv, args->envp );
kprintf("RETURNING: [%i]\n", ret);
return (ret);
}
/*****************************************************************************************
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_t 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 */
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;
/* Set these up to be ring 3 tasks */
/*
newProcess->tss.es = 0x30+3;
newProcess->tss.cs = 0x28+3;
newProcess->tss.ss = 0x30+3;
newProcess->tss.ds = 0x30+3;
newProcess->tss.fs = 0x30+3;
newProcess->tss.gs = 0x30+3;
*/
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->imageFd = 0x0;
/* 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->tss.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;
uint32_t *tmp = 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 )
kprintf( "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->tss.cr3 = (uInt32) vmm_createVirtualSpace( _current->id );
kprintf( "_current->tss.cr3: 0x%X", _current->tss.cr3 );
/* 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->tss.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) );
//kprintf(">a:%i:0x%X:0x%X<",sizeof(elfHeader),binaryHeader,tmpFd);
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;
}
_current->td.abi = binaryHeader->eIdent[EI_OSABI];
/* Load The Program Header(s) */
programHeader = (elfProgramHeader *) kmalloc( sizeof(elfProgramHeader) * binaryHeader->ePhnum );
fseek( tmpFd, binaryHeader->ePhoff, 0 );
//kprintf(">c:%i:0x%X:0x%X<",sizeof(elfProgramHeader)*binaryHeader->ePhnum,programHeader,tmpFd);
fread( programHeader, (sizeof(elfProgramHeader) * binaryHeader->ePhnum), 1, tmpFd );
//kprintf(">d<");
/* 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); x += 0x1000 ) {
/* Make readonly and read/write !!! */
if ( vmm_remapPage( vmm_findFreePage( _current->id ), ((programHeader[i].phVaddr & 0xFFFFF000) + x), PAGE_DEFAULT ) == 0x0 )
K_PANIC( "Remap Page Failed" );
memset( (void *) ((programHeader[i].phVaddr & 0xFFFFF000) + x), 0x0, 0x1000 );
}
_current->oInfo.vmStart = 0x80000000;
_current->td.vm_daddr = (u_long) (programHeader[i].phVaddr & 0xFFFFF000);
/* 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 ) {
kprintf( "pH: [0x%X]\n", programHeader[i].phMemsz );
for ( x = 0x0; x < (programHeader[i].phMemsz); 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 = 0x80000000;
_current->td.vm_daddr = (u_long) (programHeader[i].phVaddr & 0xFFFFF000);
/* Set Up Stack Space */
//MrOlsen (2016-01-14) FIX: is the stack start supposed to be addressable xhcnage x= 1 to x=0
for ( x = 0; x < 100; x++ ) {
vmm_remapPage( vmm_findFreePage( _current->id ), STACK_ADDR - (x * 0x1000), PAGE_DEFAULT | PAGE_STACK );
}
/* Kernel Stack 0x2000 bytes long */
vmm_remapPage( vmm_findFreePage( _current->id ), 0x5BC000, KERNEL_PAGE_DEFAULT | PAGE_STACK );
vmm_remapPage( vmm_findFreePage( _current->id ), 0x5BB000, KERNEL_PAGE_DEFAULT | PAGE_STACK );
/* Set All The Proper Information For The Task */
_current->tss.back_link = 0x0;
_current->tss.esp0 = 0x5BC000;
_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 = STACK_ADDR - 16;
_current->tss.ebp = STACK_ADDR;
_current->tss.esi = 0x0;
_current->tss.edi = 0x0;
/* Set these up to be ring 3 tasks */
_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 = 0x50 + 3; //0x30 + 3;
_current->tss.ldt = 0x18;
_current->tss.trace_bitmap = 0x0000;
_current->tss.io_map = 0x8000;
sched_setStatus( _current->id, READY );
kfree( binaryHeader );
kfree( programHeader );
fclose( tmpFd );
tmp = (uInt32 *) _current->tss.esp0 - 5;
tmp[0] = binaryHeader->eEntry;
tmp[3] = STACK_ADDR - 12;
//tmp = (uInt32 *) STACK_ADDR - 2;
tmp = (uint32_t *) _current->tss.esp;
/*
if ( _current->id > 4 )
kprintf( "argv[0]: [%s]\n", argv[0] );
*/
kprintf( "argv: [0x%X]\n", argv );
*tmp-- = 0x1;
*tmp-- = 0x0;
*tmp-- = 0x0;
*tmp-- = 0x0;
/*
tmp[0] = (uint32_t) argv;
tmp[1] = (uint32_t) argv;
*/
/* Switch Back To The Kernels VM Space */
asm volatile(
"movl %0,%%eax \n"
"movl %%eax,%%cr3 \n"
: : "d" ((uInt32 *)(kernelPageDirectory))
);
kprintf( "execFile Return: %i\n", _current->id );
/* Finally Return */
return;
}
/*****************************************************************************************
Function: void sysExec();
Description: This Is The System Call To Execute A New Task
Notes:
2016-01-19 - Start Of Enhanced Exec
04-22-03 - It Now Loads Sections Not The Full File
*****************************************************************************************/
int sys_exec( struct thread *td, char *file, char **argv, char **envp ) {
int i = 0x0;
int x = 0x0;
int argc = 0x0;
uint32_t cr3 = 0x0;
unsigned int *tmp = 0x0;
//uint32_t memAddr = 0x0;
uInt32 ldAddr = 0x0;
uInt32 seg_size = 0x0;
uInt32 seg_addr = 0x0;
char *interp = 0x0;
//char **argv = 0x0;
char **argvNew = 0x0;
char *args = 0x0;
fileDescriptor *fd = 0x0;
elfHeader *binaryHeader = 0x0;
elfProgramHeader *programHeader = 0x0;
elfSectionHeader *sectionHeader = 0x0;
elfDynamic *elfDynamicS = 0x0;
u_long text_addr = 0, text_size = 0;
u_long data_addr = 0, data_size = 0;
struct i386_frame *iFrame = 0x0;
//struct i386_frame *iFrameNew = 0x0;
Elf_Auxargs *auxargs = 0x0;
asm("movl %%cr3, %0;" : "=r" (cr3));
fd = fopen( file, "r" );
/* If the file doesn't exist fail */
if ( fd == 0x0 )
return (-1);
/* Test If Executable */
if ( fd->perms == 0 ) {
kprintf( "Exec Format Error: Binary File Not Executable.\n" );
fclose( fd );
return (-1);
}
/* Set Threads FD to open FD */
_current->imageFd = fd;
//! Clean the virtual of COW pages left over from the fork
//vmm_cleanVirtualSpace( (uint32_t) _current->td.vm_daddr + (_current->td.vm_dsize << PAGE_SHIFT) );
//MrOlsen 2017-12-15 - FIX! - This should be done before it was causing a lot of problems why did I free space after loading binary????
vmm_cleanVirtualSpace( (uint32_t) 0x8048000 );
/* Load ELF Header */
if ( (binaryHeader = (elfHeader *) kmalloc( sizeof(elfHeader) )) == 0x0 )
K_PANIC( "MALLOC FAILED" );
fread( binaryHeader, sizeof(elfHeader), 1, fd );
/* Done Loading ELF Header */
/* 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( fd );
return (-1);
}
else if ( binaryHeader->eType != ET_EXEC ) {
kprintf( "Exec Format Error: Binary File Not Executable.\n" );
kfree( binaryHeader );
fclose( fd );
return (-1);
}
else if ( binaryHeader->eEntry == 0x300000 ) {
kprintf( "Exec Format Error: Binary File Not Executable.\n" );
kfree( binaryHeader );
fclose( fd );
return (-1);
}
/* Set Thread ABI */
td->abi = binaryHeader->eIdent[EI_OSABI];
/* Load The Program Header(s) */
if ( (programHeader = (elfProgramHeader *) kmalloc( sizeof(elfProgramHeader) * binaryHeader->ePhnum )) == 0x0 )
K_PANIC( "MALLOC FAILED" );
assert( programHeader );
fseek( fd, binaryHeader->ePhoff, 0 );
fread( programHeader, (sizeof(elfProgramHeader) * binaryHeader->ePhnum), 1, fd );
/* Done Loading Program Header(s) */
/* Load The Section Header(s) */
if ( (sectionHeader = (elfSectionHeader *) kmalloc( sizeof(elfSectionHeader) * binaryHeader->eShnum )) == 0x0 )
K_PANIC( "MALLOC FAILED" );
assert( sectionHeader );
fseek( fd, binaryHeader->eShoff, 0 );
fread( sectionHeader, sizeof(elfSectionHeader) * binaryHeader->eShnum, 1, fd );
/* Done Loading Section Header(s) */
/* Loop Through The Header And Load Sections Which Need To Be Loaded */
for ( i = 0; i < binaryHeader->ePhnum; i++ ) {
switch ( programHeader[i].phType ) {
case PT_LOAD:
if ( programHeader[i].phMemsz == 0x0 )
break;
seg_addr = trunc_page( programHeader[i].phVaddr );
seg_size = round_page( programHeader[i].phMemsz + programHeader[i].phVaddr - seg_addr );
/*
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 < (round_page( programHeader[i].phMemsz )); x += 0x1000 ) {
/* Make readonly and read/write !!! */
if ( vmm_remapPage( vmm_findFreePage( _current->id ), ((programHeader[i].phVaddr & 0xFFFFF000) + x), PAGE_DEFAULT ) == 0x0 ) {
K_PANIC( "Error: Remap Page Failed" );
} /*
else {
kprintf("rP[0x%X]", (programHeader[i].phVaddr & 0xFFFFF000) + x);
} */
memset( (void *) ((programHeader[i].phVaddr & 0xFFFFF000) + x), 0x0, 0x1000 );
}
/* Now Load Section To Memory */
fseek( fd, programHeader[i].phOffset, 0 );
fread( (void *) programHeader[i].phVaddr, programHeader[i].phFilesz, 1, fd );
if ( (programHeader[i].phFlags & 0x2) != 0x2 ) {
for ( x = 0x0; x < (round_page( programHeader[i].phMemsz )); 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__ );
}
}
if ((programHeader[i].phFlags & PF_X) && text_size < seg_size) {
kprintf( "setting text: 0x%X - 0x%X\n", seg_addr, seg_size );
text_size = seg_size;
text_addr = seg_addr;
}
else {
kprintf( "setting data: 0x%X - 0x%X\n", seg_addr, seg_size );
data_size = seg_size;
data_addr = seg_addr;
/*
_current->td.vm_dsize = seg_size >> PAGE_SHIFT;
_current->td.vm_daddr = (char *) seg_addr;
kprintf( "setting daddr: 0x%X, dsiize: 0x%X\n", _current->td.vm_daddr, _current->td.vm_dsize );
*/
}
/*
* MrOlsen (2016-01-19) NOTE: Note Sure, I should Do This Later
* Thjis is for stack space
*/
_current->oInfo.vmStart = ((programHeader[i].phVaddr & 0xFFFFF000) + 0xA900000);
break;
case PT_DYNAMIC:
//newLoc = (char *)programHeader[i].phVaddr;
elfDynamicS = (elfDynamic *) programHeader[i].phVaddr;
fseek( fd, programHeader[i].phOffset, 0 );
fread( (void *) programHeader[i].phVaddr, programHeader[i].phFilesz, 1, fd );
break;
case PT_INTERP:
kprintf( "Malloc: %i\n", programHeader[i].phFilesz );
interp = (char *) kmalloc( programHeader[i].phFilesz );
fseek( fd, programHeader[i].phOffset, 0 );
fread( (void *) interp, programHeader[i].phFilesz, 1, fd );
kprintf( "Interp: [%s]\n", interp );
ldAddr = ldEnable();
break;
case PT_GNU_STACK:
break;
default:
break;
}
}
_current->td.vm_tsize = text_size >> PAGE_SHIFT;
_current->td.vm_taddr = text_addr;
_current->td.vm_dsize = data_size >> PAGE_SHIFT;
_current->td.vm_daddr = data_addr;
kprintf( "Done Looping\n" );
/* What is this doing? 11/23/06 */
if ( elfDynamicS != 0x0 ) {
for ( i = 0; i < 12; i++ ) {
if ( elfDynamicS[i].dynVal == 0x3 ) {
tmp = (void *) elfDynamicS[i].dynPtr;
if ( tmp == 0x0 )
kpanic( "tmp: NULL\n" );
else
kprintf("[0x%X]", tmp);
tmp[2] = (uInt32) ldAddr;
tmp[1] = (uInt32) fd;
break;
}
/*
else {
kprintf("dyn_val: %i",elfDynamicS[i].dynVal);
}
*/
}
}
/*
_current->td.vm_dsize = seg_size >> PAGE_SHIFT;
_current->td.vm_daddr = (char *) seg_addr;
*/
//argv = ≈
//if (argv[1] != 0x0) {
if ( argv != 0x0 ) {
//MrOlsen (2016-01-12) FIX: Not sure why argv[0] == 0
argc = ((int) argv[0] > 0) ? (int) argv[0] : 1;
kprintf( "argc: %i", argc );
args = (char *) vmmGetFreeVirtualPage( _current->id, 1, VM_TASK );
kprintf( "argc: %i, args 0x%X", argc, args );
memset( args, 0x0, 0x1000 );
x = 0x0;
argvNew = (char **) kmalloc( sizeof(char *) * argc );
for ( i = 0x0; i < argc; i++ ) {
strcpy( args + x, argv[i + 1] );
argvNew[i] = args + x;
x += strlen( argv[i + 1] ) + 1;
//args[x] = '\0';
//x++;
}
argv = argvNew;
}
else {
argc = 1;
}
iFrame = (struct i386_frame *) (_current->tss.esp0 - sizeof(struct i386_frame));
/*
iFrameNew = (struct i386_frame *) kmalloc( sizeof(struct i386_frame) );
memcpy( iFrameNew, iFrame, sizeof(struct i386_frame) );
*/
//! Adjust iframe
// iFrame = (struct i386_frame *) (_current->tss.esp0 - sizeof(struct i386_frame));
//kprintf( "EBP-1(%i): EBP: [0x%X], EIP: [0x%X], ESP: [0x%X]\n", _current->id, iFrame->ebp, iFrame->eip, iFrame->user_esp );
iFrame->ebp = STACK_ADDR;
iFrame->eip = binaryHeader->eEntry;
iFrame->user_esp = ((uint32_t) STACK_ADDR) - (sizeof(uint32_t) * (argc + 3));
tmp = (void *) iFrame->user_esp; //MrOlsen 2017-11-14 iFrame->user_ebp;
//kprintf( "STACK: 0x%X, ESP0: 0x%X\n", iFrame->user_esp, _current->tss.esp0 );
//! build argc and argv[]
/*MrOlsen Did I Fuck Up Stack?
*tmp-- = argc;
//kprintf( "xSTACK: 0x%X, ESP0: 0x%X\n", iFrame->user_esp, _current->tss.esp0 );
if ( argc == 1 ) {
*tmp-- = 0x0;
}
else {
for ( i = 0; i < argc; i++ ) {
*tmp-- = (u_int) argv[i];
}
}
*tmp-- = 0x0; // ARGV Terminator
*tmp-- = 0x0; // ENV Terminator
*/
/*
* App Entry Stack
argc
argv[0]
argv[1]
argv[2] ..
argv[argc - 1] = null - END OF ARGV
env[0]
env[1]
NULL end of env
*/
//}
//else {
//tmp = (uint32_t *)STACK_ADDR - 2;
//tmp[0] = 0x1;
//tmp[1] = 0x0;
//tmp[1] = (uint32_t)argv;
//}
kfree( argvNew );
/* Now That We Relocated The Binary We Can Unmap And Free Header Info */
kfree( binaryHeader );
kfree( programHeader );
//kprintf( "EBP-3(%i): [0x%X], EIP: [0x%X], ESP: [0x%X]\n", _current->id, iFrame->ebp, iFrame->eip, iFrame->user_esp );
//kprintf( "Done EXEC\n" );
/*
asm("cli");
_current->tss.eip = (long) iFrameNew->eip;
_current->tss.eflags = 0x206;
_current->tss.esp = iFrameNew->user_esp;
_current->tss.ebp = iFrameNew->ebp;
*/
/* Set these up to be ring 3 tasks */
/*
_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 = 0x50 + 3; //0x30 + 3;
_current->tss.ldt = 0x18;
_current->tss.trace_bitmap = 0x0000;
_current->tss.io_map = 0x8000;
*/
/*
kfree (iFrameNew);
memAddr = (uint32_t) & (_current->tss);
ubixGDT[4].descriptor.baseLow = (memAddr & 0xFFFF);
ubixGDT[4].descriptor.baseMed = ((memAddr >> 16) & 0xFF);
ubixGDT[4].descriptor.baseHigh = (memAddr >> 24);
ubixGDT[4].descriptor.access = '\x89';
ubixGDT[10].descriptor.baseLow = (STACK_ADDR & 0xFFFF);
ubixGDT[10].descriptor.baseMed = ((STACK_ADDR >> 16) & 0xFF);
ubixGDT[10].descriptor.baseHigh = (STACK_ADDR >> 24);
*/
/*
asm(
"sti\n"
"ljmp $0x20,$0\n"
);
*/
tmp = (char *)iFrame->eip;
//kprintf("N:[0x%X]\n", tmp[0]);
//kprintf( "EBP-4(%i): [0x%X], EBP: [0x%X], EIP: [0x%X], ESP: [0x%X], CR3: [0x%X-0x%X]\n", _current->id, _current->oInfo.vmStart, iFrame->ebp, iFrame->eip, iFrame->user_esp, cr3, kernelPageDirectory );
return (0x0);
}
/*!
* \brief New exec...
*/
int sys_exec_dead( char *file, char *ap ) {
int error = 0x0;
int i = 0x0;
int x = 0x0;
int argc = 0x0;
uint32_t *tmp = 0x0;
uint32_t seg_size = 0x0;
uint32_t seg_addr = 0x0;
uint32_t addr = 0x0;
uint32_t eip = 0x0;
uint32_t proghdr = 0x0;
char *args = 0x0;
char *interp = 0x0;
char **argv = 0x0;
char **argvNew = 0x0;
elfHeader *binaryHeader = 0x0;
elfProgramHeader *programHeader = 0x0;
struct i386_frame *iFrame = 0x0;
Elf_Auxargs *auxargs = 0x0;
kprintf( "SYS_EXEC: %s\n", file );
_current->imageFd = fopen( file, "r" );
if ( _current->imageFd == 0x0 )
return (-1);
/* MrOlsen (2016-01-10): BROKEN - Why Do I Return If I Can't?
return(-1);
*/
/* Load the ELF header */
if ( (binaryHeader = (elfHeader *) kmalloc( sizeof(elfHeader) )) == 0x0 )
K_PANIC( "malloc failed!" );
fread( binaryHeader, sizeof(elfHeader), 1, _current->imageFd );
/* Check If App Is A Real Application */
if ( ((binaryHeader->eIdent[1] != 'E') && (binaryHeader->eIdent[2] != 'L') && (binaryHeader->eIdent[3] != 'F')) || (binaryHeader->eType != ET_EXEC) ) {
kfree( binaryHeader );
fclose( _current->imageFd );
/* MrOlsen (2016-01-10): BROKEN - Why Do I Return If I Can't?
return(-1);
*/
return (-1);
}
/* Load The Program Header(s) */
if ( (programHeader = (elfProgramHeader *) kmalloc( sizeof(elfProgramHeader) * binaryHeader->ePhnum )) == 0x0 )
K_PANIC( "malloc failed!" );
fseek( _current->imageFd, binaryHeader->ePhoff, 0 );
fread( programHeader, (sizeof(elfProgramHeader) * binaryHeader->ePhnum), 1, _current->imageFd );
/* Loop Through The Header And Load Sections Which Need To Be Loaded */
for ( i = 0x0; i < binaryHeader->ePhnum; i++ ) {
switch ( programHeader[i].phType ) {
case PT_LOAD:
seg_addr = trunc_page( programHeader[i].phVaddr );
seg_size = round_page( programHeader[i].phMemsz + programHeader[i].phVaddr - seg_addr );
/*
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); x += 0x1000 ) {
/* Make readonly and read/write !!! */
if ( vmm_remapPage( vmm_findFreePage( _current->id ), ((programHeader[i].phVaddr & 0xFFFFF000) + x), PAGE_DEFAULT ) == 0x0 )
K_PANIC( "Error: Remap Page Failed" );
memset( (void *) ((programHeader[i].phVaddr & 0xFFFFF000) + x), 0x0, 0x1000 );
}
/* Now Load Section To Memory */
fseek( _current->imageFd, programHeader[i].phOffset, 0 );
fread( (void *) programHeader[i].phVaddr, programHeader[i].phFilesz, 1, _current->imageFd );
if ( (programHeader[i].phFlags & 0x2) != 0x2 ) {
for ( x = 0x0; x < (programHeader[i].phMemsz); x += 0x1000 ) {
if ( (vmm_setPageAttributes( (programHeader[i].phVaddr & 0xFFFFF000) + x, PAGE_PRESENT | PAGE_USER )) != 0x0 )
K_PANIC( "vmm_setPageAttributes failed" );
}
}
if ( binaryHeader->eEntry >= programHeader[i].phVaddr && binaryHeader->eEntry < (programHeader[i].phVaddr + programHeader[i].phMemsz) ) {
/* We're suposed to do something here? */
}
else {
_current->td.vm_dsize = seg_size >> PAGE_SHIFT;
_current->td.vm_daddr = (u_long) seg_addr;
}
_current->oInfo.vmStart = ((programHeader[i].phVaddr & 0xFFFFF000) + 0xA900000);
break;
case PT_INTERP:
interp = (char *) kmalloc( programHeader[i].phFilesz );
if ( interp == 0x0 )
K_PANIC( "malloc failed" );
fseek( _current->imageFd, programHeader[i].phOffset, 0 );
fread( (void *) interp, programHeader[i].phFilesz, 1, _current->imageFd );
kprintf( "Interp: [%s]\n", interp );
//ldAddr = ldEnable();
break;
case PT_PHDR:
proghdr = programHeader[i].phVaddr;
break;
default:
break;
}
}
addr = LD_START;
if ( interp != 0x0 ) {
//kprintf("TEST");
elf_loadfile( _current, interp, &addr, &eip );
}
kprintf( "[0x%X][0x%X]\n", eip, addr );
_current->td.vm_dsize = seg_size >> PAGE_SHIFT;
_current->td.vm_daddr = (u_long) seg_addr;
//! copy in arg strings
argv = (char **)ap;
if ( argv[1] != 0x0 ) {
argc = (int) argv[0];
args = (char *) vmmGetFreeVirtualPage( _current->id, 1, VM_TASK );
memset( args, 0x0, 0x1000 );
x = 0x0;
argvNew = (char **) kmalloc( sizeof(char *) * argc );
for ( i = 0x0; i < argc; i++ ) {
strcpy( args + x, argv[i + 1] );
argvNew[i] = args + x;
x += strlen( argv[i + 1] ) + 1;
}
argv = argvNew;
}
//! Clean the virtual of COW pages left over from the fork
vmm_cleanVirtualSpace( (uint32_t) _current->td.vm_daddr + (_current->td.vm_dsize << PAGE_SHIFT) );
//! Adjust iframe
iFrame = (struct i386_frame *) _current->tss.esp0 - sizeof(struct i386_frame);
iFrame->ebp = STACK_ADDR;
iFrame->eip = eip;
//if (_current->id > 3) {
iFrame->user_esp = ((uint32_t) STACK_ADDR) - (sizeof(uint32_t) * (argc + 4 + (sizeof(Elf_Auxargs) * 2)));
kprintf( "\n\n\nuser_esp: [0x%X]\n", iFrame->user_esp );
tmp = (uint32_t *) iFrame->user_esp;
//! build argc and argv[]
tmp[0] = argc;
for ( i = 0; i < argc; i++ ) {
tmp[i + 1] = (uint32_t) argv[i];
}
//! Build ENV
args = (char *) vmmGetFreeVirtualPage( _current->id, 1, VM_TASK );
memset( args, 0x0, 0x1000 );
strcpy( args, "LIBRARY_PATH=/lib" );
tmp[argc + 2] = (uint32_t) args;
kprintf( "env: [0x%X][0x%X]\n", (uInt32) tmp + argc + 2, tmp[argc + 2] );
tmp[argc + 3] = 0x0;
kprintf( "env: [0x%X][0x%X]\n", (uInt32) tmp + argc + 2, tmp[argc + 2] );
//auxargs = iFrame->user_esp + argc + 3;
tmp = (uint32_t *) iFrame->user_esp;
tmp += argc + 4;
auxargs->execfd = -1;
auxargs->phdr = proghdr;
auxargs->phent = binaryHeader->ePhentsize;
auxargs->phnum = binaryHeader->ePhnum;
auxargs->pagesz = PAGE_SIZE;
auxargs->base = addr;
auxargs->flags = 0x0;
auxargs->entry = binaryHeader->eEntry;
auxargs->trace = 0x0;
AUXARGS_ENTRY( tmp, AT_PHDR, auxargs->phdr );
AUXARGS_ENTRY( tmp, AT_PHENT, auxargs->phent );
AUXARGS_ENTRY( tmp, AT_PHNUM, auxargs->phnum );
AUXARGS_ENTRY( tmp, AT_PAGESZ, auxargs->pagesz );
AUXARGS_ENTRY( tmp, AT_FLAGS, auxargs->flags );
AUXARGS_ENTRY( tmp, AT_ENTRY, auxargs->entry );
AUXARGS_ENTRY( tmp, AT_BASE, auxargs->base );
AUXARGS_ENTRY( tmp, AT_NULL, 0 );
kprintf( "AT_BASE: [0x%X]\n", auxargs->base );
//iFrame->ebx = 0x0;
//iFrame->ebx = 0x0;
//iFrame->eip = binaryHeader->eEntry;
//kprintf("\n\nDOH: [0x%X]\n\n",iFrame->eip);
/*
error = elf_loadfile(_current,file,0x0,0x0);
if (error)
K_PANIC("elf_loadfile failed");
*/
return (0x0);
}
/***
END
***/
Charlie Root