/*****************************************************************************************
Copyright (c) 2002-2004,2009 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/elf.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>
/* WHERE SHOULD THE STACK BE? */
#define STACK_ADDR 0x80000000 //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++;}
/*****************************************************************************************
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 */
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;
u_int32_t *tmp = 0x0;
struct file *tmpFd = 0x0;
elfHeader *binaryHeader = 0x0;
elfProgramHeader *programHeader = 0x0;
/* Get A New Task For This Proccess */
kprintf("execFile: %s",file);
_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)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->tss.cr3))
);
/* Lets Find The File */
tmpFd = (struct file *)kmalloc(sizeof(struct file));
//KUBU
memset(tmpFd,0x0,sizeof(struct file));
fopen(tmpFd,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);
//UBU
kprintf("2");
/* 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);
//kprintf(">c:%i:0x%X:0x%X<",sizeof(elfProgramHeader)*binaryHeader->ePhnum,programHeader,tmpFd);
fread(programHeader,(sizeof(elfProgramHeader)*binaryHeader->ePhnum),1,tmpFd);
//kprintf(">d<");
kprintf("1");
/* 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 = (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) {
#ifdef DEBUG
kprintf("pH: [0x%X]\n",programHeader[i].phMemsz);
#endif
for (x = 0x0;x < (programHeader[i].phMemsz);x += 0x1000) {
vmm_setPageAttributes((programHeader[i].phVaddr & 0xFFFFF000) + x,PAGE_PRESENT | PAGE_USER);
}
}
}
}
/* Set Virtual Memory Start */
_current->oInfo.vmStart = 0x80000000;
_current->td.vm_daddr = (programHeader[i].phVaddr & 0xFFFFF000);
/* Set Up Stack Space */
for (x = 1;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 - 12;
_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 = 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;
/*
if (_current->id > 4)
kprintf("argv[0]: [%s]\n",argv[0]);
kprintf("argv: [0x%X]\n",argv);
*/
tmp[0] = (u_int32_t)argv;
tmp[1] = (u_int32_t)argv;
/* 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,char *ap,char *ep) {
int i = 0x0;
int x = 0x0;
int argc = 0x0;
uInt32 *tmp = 0x0;
uInt32 ldAddr = 0x0;
uInt32 seg_size = 0x0;
uInt32 seg_addr = 0x0;
char *interp = 0x0;
char **argv = 0x0;
char **envp = 0x0;
char **argvNew = 0x0;
char *args = 0x0;
struct file *tmpFd = 0x0;
elfHeader *binaryHeader = 0x0;
elfProgramHeader *programHeader = 0x0;
elfSectionHeader *sectionHeader = 0x0;
elfDynamic *elfDynamicS = 0x0;
struct i386_frame *iFrame = 0x0;
/* Need to rewrite this routine? */
tmpFd = (struct file *)kmalloc(sizeof(struct file));
if (fopen(tmpFd,file,"r") == 0x0) {
//kprintf("[0x%X]\n",tmpFd);
//kfree(tmpFd); //We need this but it's being done in fopen right now
//UBU WHY?
kpanic("WTF!");
return;
_current->imageFd = 0x0;
}
kprintf("Sys EXEC: %i 0x%X 0x%X\n",tmpFd->size,ap,ep);
/* Set tasks FD for binary */
_current->imageFd = tmpFd;
if (tmpFd->perms == 0) {
kprintf("Exec Format Error: Binary File Not Executable.\n");
fclose(tmpFd);
return;
}
/* FIX - Putting In Extra Sanity Checks While Kernel Is Buggy */
/* Load ELF Header */
if ((binaryHeader = (elfHeader *)kmalloc(sizeof(elfHeader))) == 0x0)
K_PANIC("kmalloc: Filed to allocate for elfHeader");
if (fread(binaryHeader,sizeof(elfHeader),1,tmpFd) != sizeof(elfHeader))
K_PANIC("fread: Read more then specified\n");
/* 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)
K_PANIC("kmalloc: failed to allocate memory");
assert(programHeader);
fseek(tmpFd,binaryHeader->ePhoff,0);
if (fread(programHeader,(sizeof(elfProgramHeader)*binaryHeader->ePhnum),1,tmpFd) != (sizeof(elfProgramHeader)*binaryHeader->ePhnum))
K_PANIC("fread: Read more than specified");
if ((sectionHeader = (elfSectionHeader *)kmalloc(sizeof(elfSectionHeader)*binaryHeader->eShnum)) == 0x0)
K_PANIC("kmalloc: failed to allocate memory");
assert(sectionHeader);
fseek(tmpFd,binaryHeader->eShoff,0);
if (fread(sectionHeader,sizeof(elfSectionHeader)*binaryHeader->eShnum,1,tmpFd) != (sizeof(elfSectionHeader)*binaryHeader->eShnum))
K_PANIC("fread: read more than specified");
kprintf("This Loop SegFaults HERE: [%i]\n",binaryHeader->ePhnum);
/* Loop Through The Header And Load Sections Which Need To Be Loaded */
for (i=0;i<binaryHeader->ePhnum;i++) {
kprintf("phType: 0x%X, PT_LOAD: 0x%X\n",programHeader[i].phType,PT_LOAD);
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);
kprintf("seg_addr: 0x%X, seg_size: 0x%X\n",seg_addr,seg_size);
/*
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 < seg_size;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);
kprintf(".");
}
kprintf("A");
/* 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 < seg_size;x += 0x1000) {
vmm_setPageAttributes((programHeader[i].phVaddr & 0xFFFFF000) + x,PAGE_PRESENT | PAGE_USER);
}
}
#ifdef DEBUG
kprintf("setting daddr\n");
#endif
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 = seg_addr;
}
_current->oInfo.vmStart = ((programHeader[i].phVaddr & 0xFFFFF000) + 0xA900000);
break;
case PT_DYNAMIC:
//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);
kprintf(".DYN.\n");
break;
case PT_INTERP:
interp = (char *)kmalloc(programHeader[i].phFilesz);
fseek(tmpFd,programHeader[i].phOffset,0);
kprintf("R: %i, %i\n",fread((void *)interp,programHeader[i].phFilesz,1,tmpFd),programHeader[i].phFilesz);
#ifdef LD_DEBUG
kprintf("Interp: [%s]\n",interp);
#endif
ldAddr = ldEnable();
break;
default:
break;
}
}
kprintf("What is this doing?\n");
/* What is this doing? 11/23/06 */
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;
}
/*
else {
kprintf("dyn_val: %i",elfDynamicS[i].dynVal);
}
*/
}
}
_current->td.vm_dsize = seg_size >> PAGE_SHIFT;
_current->td.vm_daddr = seg_addr;
kprintf("STATING: [0x%X][0x%X]\n",_current->td.vm_dsize,_current->td.vm_daddr);
argv = (char **)ap;
envp = (char **)ep;
if ((ep != 0x0) && (envp[0] != 0x0))
kprintf("ENV SIZE: [0x%X]\n",envp[0]);
if (argv[1] != 0x0) {
//UBU
argc = (int)argv[0];
args = (char *)vmmGetFreeVirtualPage(_current->id,1,VM_TASK);
//! do we need this?
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;
}
//! Clean the virtual of COW pages left over from the fork
//QUESTION Why did I feel a need to add vm_dsize to vm_daddr
kprintf("First: 0x%X, 0x%X\n",_current->td.vm_dsize,_current->td.vm_daddr);
vmm_cleanVirtualSpace((u_int32_t)_current->td.vm_daddr);// + (_current->td.vm_dsize << PAGE_SIZE));
//! Adjust iframe
iFrame = (struct i386_frame *)(_current->tss.esp0 - sizeof(struct i386_frame));
iFrame->ebp = STACK_ADDR;
iFrame->eip = binaryHeader->eEntry;
iFrame->user_esp = STACK_ADDR - 12;
//if (_current->id > 3) {
iFrame->user_esp = ((u_int32_t)STACK_ADDR) - (sizeof(u_int32_t) * (argc + 3));
tmp = (u_int32_t *)iFrame->user_esp;
//! build argc and argv[]
tmp[0] = argc;
for (i = 0;i < argc;i++) {
tmp[i + 1] = (u_int32_t)argv[i];
}
tmp[argc + 1] = 0x0;
tmp[argc + 2] = 0x1;
//}
//else {
//tmp = (u_int32_t *)STACK_ADDR - 2;
//tmp[0] = 0x1;
//tmp[1] = 0x0;
//tmp[1] = (u_int32_t)argv;
//}
kfree(argvNew);
/* Now That We Relocated The Binary We Can Unmap And Free Header Info */
kfree(binaryHeader);
kfree(programHeader);
return;
}
/*!
* \brief New exec...
*
*/
void sys_exec(char *file,char *ap) {
int i = 0x0;
int x = 0x0;
int argc = 0x0;
u_int32_t *tmp = 0x0;
u_int32_t seg_size = 0x0;
u_int32_t seg_addr = 0x0;
u_int32_t addr = 0x0;
u_int32_t eip = 0x0;
u_int32_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;
_current->imageFd = (struct file *)kmalloc(sizeof(struct file));
fopen(_current->imageFd,file,"r");
if (_current->imageFd == 0x0)
K_PANIC("sys_exec");
/* 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);
K_PANIC("sys_exec");
}
/* 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) {
vmm_setPageAttributes((programHeader[i].phVaddr & 0xFFFFF000) + x,PAGE_PRESENT | PAGE_USER);
}
}
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 = 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);
#ifdef LD_DEBUG
kprintf("Interp: [%s]\n",interp);
#endif
//ldAddr = ldEnable();
break;
case PT_PHDR:
proghdr = programHeader[i].phVaddr;
kprintf("proghdr: 0x%X\n",proghdr);
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 = 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
//QUESTION Why did I add dsize to daddr?
kprintf("Second: 0x%X, 0x%X\n",_current->td.vm_dsize,_current->td.vm_daddr);
vmm_cleanVirtualSpace((u_int32_t)_current->td.vm_daddr);// + (_current->td.vm_dsize << PAGE_SIZE));
//! 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 = ((u_int32_t)STACK_ADDR) - (sizeof(u_int32_t) * (argc + 4 + (sizeof(Elf_Auxargs) * 2)));
#ifdef DEBUG
kprintf("\n\n\nuser_esp: [0x%X]\n",iFrame->user_esp);
#endif
tmp = (u_int32_t *)iFrame->user_esp;
//! build argc and argv[]
tmp[0] = argc;
for (i = 0;i < argc;i++) {
tmp[i + 1] = (u_int32_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] = (u_int32_t)args;
#ifdef DEBUG
kprintf("env: [0x%X][0x%X]\n",(uInt32)tmp + argc + 2,tmp[argc + 2]);
#endif
tmp[argc + 3] = 0x0;
#ifdef DEBUG
kprintf("env: [0x%X][0x%X]\n",(uInt32)tmp + argc + 2,tmp[argc + 2]);
#endif
tmp = (u_int32_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);
#ifdef DEBUG
kprintf("AT_BASE: [0x%X]\n",auxargs->base);
#endif
}
/***
END
***/
