/*-
* Copyright (c) 2002-2004, 2016, 2018 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.
*/
#include <sys/elf.h>
#include <sys/gdt.h>
#include <ubixos/exec.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>
#include <string.h>
#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) {*pos = id;pos++; *pos = val;pos++;}
/*****************************************************************************************
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;
Elf32_Ehdr *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 = (Elf32_Ehdr *) kmalloc( sizeof(Elf32_Ehdr) );
//kprintf(">a:%i:0x%X:0x%X<",sizeof(Elf32_Ehdr),binaryHeader,tmpFd);
fread( binaryHeader, sizeof(Elf32_Ehdr), 1, tmpFd );
/* Check If App Is A Real Application */
if ( (binaryHeader->e_ident[1] != 'E') && (binaryHeader->e_ident[2] != 'L') && (binaryHeader->e_ident[3] != 'F') ) {
kprintf( "Exec Format Error: Binary File Not Executable.\n" );
kfree( binaryHeader );
fclose( tmpFd );
return;
}
else if ( binaryHeader->e_type != 2 ) {
kprintf( "Exec Format Error: Binary File Not Executable.\n" );
kfree( binaryHeader );
fclose( tmpFd );
return;
}
else if ( binaryHeader->e_entry == 0x300000 ) {
kprintf( "Exec Format Error: Binary File Not Executable.\n" );
kfree( binaryHeader );
fclose( tmpFd );
return;
}
_current->td.abi = binaryHeader->e_ident[EI_OSABI];
/* Load The Program Header(s) */
programHeader = (elfProgramHeader *) kmalloc( sizeof(elfProgramHeader) * binaryHeader->e_phnum );
fseek( tmpFd, binaryHeader->e_phoff, 0 );
//kprintf(">c:%i:0x%X:0x%X<",sizeof(elfProgramHeader)*binaryHeader->e_phnum,programHeader,tmpFd);
fread( programHeader, (sizeof(elfProgramHeader) * binaryHeader->e_phnum), 1, tmpFd );
//kprintf(">d<");
/* Loop Through The Header And Load Sections Which Need To Be Loaded */
for ( i = 0; i < binaryHeader->e_phnum; 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->e_entry;
_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->e_entry;
tmp[3] = STACK_ADDR - 12;
tmp = (uint32_t *) _current->tss.esp;
kprintf( "argv: [0x%X]\n", argv );
//*tmp++ = 0x0; // Stack EIP Return Addr
//*tmp++ = tmp + 1; // Pointer To AP
*tmp++ = 0x1; // ARGC
*tmp++ = 0x100; // ARGV
*tmp++ = 0x0; // ARGV TERM
*tmp++ = 0x0; // ENV
*tmp++ = 0x0; // ENV TERM
*tmp++ = 0x0; // AUX 1.A
*tmp++ = 0x0; // AUX 1.B
*tmp++ = 0x0; // AUX TERM
*tmp++ = 0x0; // AUX TERM
*tmp++ = 0x1; // TERM
/* 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;
Elf32_Ehdr *binaryHeader = 0x0;
elfProgramHeader *programHeader = 0x0;
elfSectionHeader *sectionHeader = 0x0;
elfDynamic *elfDynamicS = 0x0;
elfDynamic *dynp = 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 = (Elf32_Ehdr *) kmalloc( sizeof(Elf32_Ehdr) )) == 0x0 )
K_PANIC( "MALLOC FAILED" );
fread( binaryHeader, sizeof(Elf32_Ehdr), 1, fd );
/* Done Loading ELF Header */
/* Check If App Is A Real Application */
if ( (binaryHeader->e_ident[1] != 'E') && (binaryHeader->e_ident[2] != 'L') && (binaryHeader->e_ident[3] != 'F') ) {
kprintf( "Exec Format Error: Binary File Not Executable.\n" );
kfree( binaryHeader );
fclose( fd );
return (-1);
}
else if ( binaryHeader->e_type != ET_EXEC ) {
kprintf( "Exec Format Error: Binary File Not Executable.\n" );
kfree( binaryHeader );
fclose( fd );
return (-1);
}
else if ( binaryHeader->e_entry == 0x300000 ) {
kprintf( "Exec Format Error: Binary File Not Executable.\n" );
kfree( binaryHeader );
fclose( fd );
return (-1);
}
/* Set Thread ABI */
td->abi = binaryHeader->e_ident[EI_OSABI];
/* Load The Program Header(s) */
if ( (programHeader = (elfProgramHeader *) kmalloc( sizeof(elfProgramHeader) * binaryHeader->e_phnum )) == 0x0 )
K_PANIC( "MALLOC FAILED" );
assert( programHeader );
fseek( fd, binaryHeader->e_phoff, 0 );
fread( programHeader, (sizeof(elfProgramHeader) * binaryHeader->e_phnum), 1, fd );
/* Done Loading Program Header(s) */
/* Load The Section Header(s) */
if ( (sectionHeader = (elfSectionHeader *) kmalloc( sizeof(elfSectionHeader) * binaryHeader->e_shnum )) == 0x0 )
K_PANIC( "MALLOC FAILED" );
assert( sectionHeader );
fseek( fd, binaryHeader->e_shoff, 0 );
fread( sectionHeader, sizeof(elfSectionHeader) * binaryHeader->e_shnum, 1, fd );
/* Done Loading Section Header(s) */
/* Loop Through The Header And Load Sections Which Need To Be Loaded */
for ( i = 0; i < binaryHeader->e_phnum; 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 ( dynp = elfDynamicS ; dynp->d_tag != 0x0; dynp++) {
switch (dynp->d_tag) {
case DT_NEEDED:
break;
case DT_INIT:
break;
case DT_FINI:
break;
case DT_HASH:
kprintf("COM BACK TO THIS");
break;
case DT_STRTAB:
break;
case DT_SYMTAB:
break;
case DT_STRSZ:
break;
case DT_SYMENT:
break;
case DT_DEBUG:
break;
case DT_PLTRE:
break;
case DT_JMPREL:
break;
case DT_REL:
break;
case DT_RELSZ:
break;
case DT_RELENT:
if (dynp->d_un.d_val != sizeof(Elf_Rel))
kpanic("NOEXEC");
break;
case DT_PLTGOT:
tmp = (void *) dynp->d_un.d_ptr;//elfDynamicS[i].dynPtr;
if ( tmp == 0x0 )
kpanic( "tmp: NULL\n" );
else
kprintf("[0x%X]", tmp);
tmp[2] = (uInt32) ldAddr;
tmp[1] = (uInt32) fd;
break;
default:
kprintf("t_tag: 0x%X>", dynp->d_tag);
break;
}
}
}
/*
_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 *) vmm_getFreeVirtualPage( _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 );
argc = 1;
iFrame->ebp = 0x0;//STACK_ADDR;
iFrame->eip = binaryHeader->e_entry;
//iFrame->user_ebp = 0x0;
iFrame->edx = 0x0;
//iFrame->user_esp = ((uint32_t) STACK_ADDR) - ((sizeof(uint32_t) * (argc + 8 + 1)) + (sizeof(Elf32_Auxinfo) * 2));
iFrame->user_esp = ((uint32_t) STACK_ADDR) - (128);//(sizeof(uint32_t) * (argc + 8 + 1)) + (sizeof(Elf32_Auxinfo) * 2));
tmp = (void *) iFrame->user_esp; //MrOlsen 2017-11-14 iFrame->user_ebp;
kprintf("[0x%X][0x%X]", iFrame->user_esp,tmp);
//memset(tmp,0x0,((sizeof(uint32_t) * (argc + 8 + 1)) + (sizeof(Elf32_Auxinfo) * 2)));
memset((char *)(STACK_ADDR - 128),0x0,128);
tmp[0] = argc; // ARGC
/*
if ( argc == 1 ) {
*tmp++ = 0x0; //ARGV Pointers
}
else {
for ( i = 0; i < argc; i++ ) {
*tmp++ = (u_int) argv[i];
}
}
*/
tmp[1] = 0x0; // ARGV
tmp[2] = 0x0; // ARGV Terminator
tmp[3] = 0x0; // ENV
tmp[4] = 0x0; // ENV Terminator
tmp[5] = 0x0;
tmp[6] = 0x0;
tmp[7] = 0x0; // AUX VECTOR 8 Bytes
tmp[8] = 0x0; // Terminator
tmp[9] = 0xDEADBEEF; // End Marker
kfree( argvNew );
/* Now That We Relocated The Binary We Can Unmap And Free Header Info */
kfree( binaryHeader );
kfree( programHeader );
/*
_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);
*/
return (0x0);
}
Charlie Root