575 lines
17 KiB
C
575 lines
17 KiB
C
/*
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* DOS (MZ) loader
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*
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* Copyright 1998 Ove Kåven
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*
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* This code hasn't been completely cleaned up yet.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include "windef.h"
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#include "wine/winbase16.h"
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#include "winerror.h"
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#include "module.h"
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#include "peexe.h"
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#include "neexe.h"
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#include "task.h"
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#include "selectors.h"
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#include "file.h"
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#include "ldt.h"
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#include "process.h"
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#include "miscemu.h"
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#include "debugtools.h"
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#include "dosexe.h"
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#include "dosmod.h"
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#include "options.h"
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#include "server.h"
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DEFAULT_DEBUG_CHANNEL(module)
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#ifdef MZ_SUPPORTED
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#include <sys/mman.h>
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/* define this to try mapping through /proc/pid/mem instead of a temp file,
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but Linus doesn't like mmapping /proc/pid/mem, so it doesn't work for me */
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#undef MZ_MAPSELF
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#define BIOS_DATA_SEGMENT 0x40
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#define START_OFFSET 0
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#define PSP_SIZE 0x10
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#define SEG16(ptr,seg) ((LPVOID)((BYTE*)ptr+((DWORD)(seg)<<4)))
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#define SEGPTR16(ptr,segptr) ((LPVOID)((BYTE*)ptr+((DWORD)SELECTOROF(segptr)<<4)+OFFSETOF(segptr)))
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static void MZ_InitPSP( LPVOID lpPSP, LPCSTR cmdline, WORD env )
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{
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PDB16*psp=lpPSP;
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const char*cmd=cmdline?strchr(cmdline,' '):NULL;
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psp->int20=0x20CD; /* int 20 */
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/* some programs use this to calculate how much memory they need */
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psp->nextParagraph=0x9FFF;
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psp->environment=env;
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/* copy parameters */
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if (cmd) {
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#if 0
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/* command.com doesn't do this */
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while (*cmd == ' ') cmd++;
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#endif
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psp->cmdLine[0]=strlen(cmd);
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strcpy(psp->cmdLine+1,cmd);
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psp->cmdLine[psp->cmdLine[0]+1]='\r';
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} else psp->cmdLine[1]='\r';
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/* FIXME: integrate the memory stuff from Wine (msdos/dosmem.c) */
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/* FIXME: integrate the PDB stuff from Wine (loader/task.c) */
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}
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/* default INT 08 handler: increases timer tick counter but not much more */
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static char int08[]={
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0xCD,0x1C, /* int $0x1c */
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0x50, /* pushw %ax */
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0x1E, /* pushw %ds */
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0xB8,0x40,0x00, /* movw $0x40,%ax */
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0x8E,0xD8, /* movw %ax,%ds */
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#if 0
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0x83,0x06,0x6C,0x00,0x01, /* addw $1,(0x6c) */
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0x83,0x16,0x6E,0x00,0x00, /* adcw $0,(0x6e) */
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#else
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0x66,0xFF,0x06,0x6C,0x00, /* incl (0x6c) */
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#endif
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0xB0,0x20, /* movb $0x20,%al */
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0xE6,0x20, /* outb %al,$0x20 */
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0x1F, /* popw %ax */
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0x58, /* popw %ax */
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0xCF /* iret */
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};
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static void MZ_InitHandlers( LPDOSTASK lpDosTask )
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{
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WORD seg;
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LPBYTE start=DOSMEM_GetBlock(lpDosTask->hModule,sizeof(int08),&seg);
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memcpy(start,int08,sizeof(int08));
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/* INT 08: point it at our tick-incrementing handler */
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((SEGPTR*)(lpDosTask->img))[0x08]=PTR_SEG_OFF_TO_SEGPTR(seg,0);
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/* INT 1C: just point it to IRET, we don't want to handle it ourselves */
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((SEGPTR*)(lpDosTask->img))[0x1C]=PTR_SEG_OFF_TO_SEGPTR(seg,sizeof(int08)-1);
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}
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static char enter_xms[]={
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/* XMS hookable entry point */
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0xEB,0x03, /* jmp entry */
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0x90,0x90,0x90, /* nop;nop;nop */
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/* entry: */
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/* real entry point */
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/* for simplicity, we'll just use the same hook as DPMI below */
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0xCD,0x31, /* int $0x31 */
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0xCB /* lret */
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};
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static void MZ_InitXMS( LPDOSTASK lpDosTask )
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{
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LPBYTE start=DOSMEM_GetBlock(lpDosTask->hModule,sizeof(enter_xms),&(lpDosTask->xms_seg));
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memcpy(start,enter_xms,sizeof(enter_xms));
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}
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static char enter_pm[]={
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0x50, /* pushw %ax */
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0x52, /* pushw %dx */
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0x55, /* pushw %bp */
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0x89,0xE5, /* movw %sp,%bp */
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/* get return CS */
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0x8B,0x56,0x08, /* movw 8(%bp),%dx */
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/* just call int 31 here to get into protected mode... */
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/* it'll check whether it was called from dpmi_seg... */
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0xCD,0x31, /* int $0x31 */
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/* we are now in the context of a 16-bit relay call */
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/* need to fixup our stack;
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* 16-bit relay return address will be lost, but we won't worry quite yet */
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0x8E,0xD0, /* movw %ax,%ss */
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0x66,0x0F,0xB7,0xE5, /* movzwl %bp,%esp */
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/* set return CS */
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0x89,0x56,0x08, /* movw %dx,8(%bp) */
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0x5D, /* popw %bp */
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0x5A, /* popw %dx */
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0x58, /* popw %ax */
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0xCB /* lret */
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};
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static void MZ_InitDPMI( LPDOSTASK lpDosTask )
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{
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unsigned size=sizeof(enter_pm);
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LPBYTE start=DOSMEM_GetBlock(lpDosTask->hModule,size,&(lpDosTask->dpmi_seg));
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lpDosTask->dpmi_sel = SELECTOR_AllocBlock( start, size, SEGMENT_CODE, FALSE, FALSE );
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memcpy(start,enter_pm,sizeof(enter_pm));
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}
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static WORD MZ_InitEnvironment( LPDOSTASK lpDosTask, LPCSTR env, LPCSTR name )
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{
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unsigned sz=0;
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WORD seg;
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LPSTR envblk;
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if (env) {
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/* get size of environment block */
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while (env[sz++]) sz+=strlen(env+sz)+1;
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} else sz++;
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/* allocate it */
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envblk=DOSMEM_GetBlock(lpDosTask->hModule,sz+sizeof(WORD)+strlen(name)+1,&seg);
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/* fill it */
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if (env) {
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memcpy(envblk,env,sz);
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} else envblk[0]=0;
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/* DOS 3.x: the block contains 1 additional string */
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*(WORD*)(envblk+sz)=1;
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/* being the program name itself */
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strcpy(envblk+sz+sizeof(WORD),name);
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return seg;
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}
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static BOOL MZ_InitMemory( LPDOSTASK lpDosTask, NE_MODULE *pModule )
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{
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int x;
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if (lpDosTask->img) return TRUE; /* already allocated */
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/* allocate 1MB+64K shared memory */
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lpDosTask->img_ofs=START_OFFSET;
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#ifdef MZ_MAPSELF
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lpDosTask->img=VirtualAlloc(NULL,0x110000,MEM_COMMIT,PAGE_READWRITE);
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/* make sure mmap accepts it */
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((char*)lpDosTask->img)[0x10FFFF]=0;
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#else
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tmpnam(lpDosTask->mm_name);
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/* strcpy(lpDosTask->mm_name,"/tmp/mydosimage"); */
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lpDosTask->mm_fd=open(lpDosTask->mm_name,O_RDWR|O_CREAT /* |O_TRUNC */,S_IRUSR|S_IWUSR);
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if (lpDosTask->mm_fd<0) ERR("file %s could not be opened\n",lpDosTask->mm_name);
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/* expand file to 1MB+64K */
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lseek(lpDosTask->mm_fd,0x110000-1,SEEK_SET);
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x=0; write(lpDosTask->mm_fd,&x,1);
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/* map it in */
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lpDosTask->img=mmap(NULL,0x110000-START_OFFSET,PROT_READ|PROT_WRITE,MAP_SHARED,lpDosTask->mm_fd,0);
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#endif
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if (lpDosTask->img==(LPVOID)-1) {
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ERR("could not map shared memory, error=%s\n",strerror(errno));
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return FALSE;
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}
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TRACE("DOS VM86 image mapped at %08lx\n",(DWORD)lpDosTask->img);
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pModule->dos_image=lpDosTask->img;
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/* initialize the memory */
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TRACE("Initializing DOS memory structures\n");
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DOSMEM_Init(lpDosTask->hModule);
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MZ_InitHandlers(lpDosTask);
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MZ_InitXMS(lpDosTask);
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MZ_InitDPMI(lpDosTask);
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return TRUE;
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}
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static BOOL MZ_LoadImage( HFILE hFile, OFSTRUCT *ofs, LPCSTR cmdline,
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LPCSTR env, LPDOSTASK lpDosTask, NE_MODULE *pModule )
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{
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IMAGE_DOS_HEADER mz_header;
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DWORD image_start,image_size,min_size,max_size,avail;
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BYTE*psp_start,*load_start;
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int x,old_com=0;
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SEGPTR reloc;
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WORD env_seg;
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_llseek(hFile,0,FILE_BEGIN);
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if ((_lread(hFile,&mz_header,sizeof(mz_header)) != sizeof(mz_header)) ||
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(mz_header.e_magic != IMAGE_DOS_SIGNATURE)) {
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old_com=1; /* assume .COM file */
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image_start=0;
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image_size=GetFileSize(hFile,NULL);
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min_size=0x10000; max_size=0x100000;
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mz_header.e_crlc=0;
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mz_header.e_ss=0; mz_header.e_sp=0xFFFE;
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mz_header.e_cs=0; mz_header.e_ip=0x100;
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} else {
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/* calculate load size */
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image_start=mz_header.e_cparhdr<<4;
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image_size=mz_header.e_cp<<9; /* pages are 512 bytes */
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if ((mz_header.e_cblp!=0)&&(mz_header.e_cblp!=4)) image_size-=512-mz_header.e_cblp;
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image_size-=image_start;
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min_size=image_size+((DWORD)mz_header.e_minalloc<<4)+(PSP_SIZE<<4);
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max_size=image_size+((DWORD)mz_header.e_maxalloc<<4)+(PSP_SIZE<<4);
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}
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MZ_InitMemory(lpDosTask,pModule);
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/* allocate environment block */
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env_seg=MZ_InitEnvironment(lpDosTask,env,ofs->szPathName);
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/* allocate memory for the executable */
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TRACE("Allocating DOS memory (min=%ld, max=%ld)\n",min_size,max_size);
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avail=DOSMEM_Available(lpDosTask->hModule);
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if (avail<min_size) {
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ERR("insufficient DOS memory\n");
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SetLastError(ERROR_NOT_ENOUGH_MEMORY);
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return FALSE;
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}
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if (avail>max_size) avail=max_size;
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psp_start=DOSMEM_GetBlock(lpDosTask->hModule,avail,&lpDosTask->psp_seg);
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if (!psp_start) {
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ERR("error allocating DOS memory\n");
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SetLastError(ERROR_NOT_ENOUGH_MEMORY);
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return FALSE;
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}
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lpDosTask->load_seg=lpDosTask->psp_seg+(old_com?0:PSP_SIZE);
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load_start=psp_start+(PSP_SIZE<<4);
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MZ_InitPSP(psp_start, cmdline, env_seg);
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/* load executable image */
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TRACE("loading DOS %s image, %08lx bytes\n",old_com?"COM":"EXE",image_size);
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_llseek(hFile,image_start,FILE_BEGIN);
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if ((_lread(hFile,load_start,image_size)) != image_size) {
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SetLastError(ERROR_BAD_FORMAT);
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return FALSE;
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}
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if (mz_header.e_crlc) {
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/* load relocation table */
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TRACE("loading DOS EXE relocation table, %d entries\n",mz_header.e_crlc);
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/* FIXME: is this too slow without read buffering? */
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_llseek(hFile,mz_header.e_lfarlc,FILE_BEGIN);
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for (x=0; x<mz_header.e_crlc; x++) {
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if (_lread(hFile,&reloc,sizeof(reloc)) != sizeof(reloc)) {
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SetLastError(ERROR_BAD_FORMAT);
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return FALSE;
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}
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*(WORD*)SEGPTR16(load_start,reloc)+=lpDosTask->load_seg;
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}
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}
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lpDosTask->init_cs=lpDosTask->load_seg+mz_header.e_cs;
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lpDosTask->init_ip=mz_header.e_ip;
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lpDosTask->init_ss=lpDosTask->load_seg+mz_header.e_ss;
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lpDosTask->init_sp=mz_header.e_sp;
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TRACE("entry point: %04x:%04x\n",lpDosTask->init_cs,lpDosTask->init_ip);
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return TRUE;
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}
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LPDOSTASK MZ_AllocDPMITask( HMODULE16 hModule )
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{
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LPDOSTASK lpDosTask = calloc(1, sizeof(DOSTASK));
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NE_MODULE *pModule;
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if (lpDosTask) {
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lpDosTask->hModule = hModule;
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pModule = (NE_MODULE *)GlobalLock16(hModule);
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pModule->lpDosTask = lpDosTask;
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lpDosTask->img=NULL; lpDosTask->mm_name[0]=0; lpDosTask->mm_fd=-1;
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MZ_InitMemory(lpDosTask, pModule);
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GlobalUnlock16(hModule);
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}
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return lpDosTask;
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}
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static void MZ_InitTimer( LPDOSTASK lpDosTask, int ver )
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{
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if (ver<1) {
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/* can't make timer ticks */
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} else {
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int func;
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struct timeval tim;
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/* start dosmod timer at 55ms (18.2Hz) */
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func=DOSMOD_SET_TIMER;
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tim.tv_sec=0; tim.tv_usec=54925;
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write(lpDosTask->write_pipe,&func,sizeof(func));
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write(lpDosTask->write_pipe,&tim,sizeof(tim));
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}
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}
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BOOL MZ_InitTask( LPDOSTASK lpDosTask )
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{
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int write_fd[2],x_fd;
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pid_t child;
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char *fname,*farg,arg[16],fproc[64],path[256],*fpath;
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SECURITY_ATTRIBUTES attr={sizeof(attr),NULL,TRUE};
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struct get_read_fd_request *r_req = get_req_buffer();
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struct get_write_fd_request *w_req = get_req_buffer();
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if (!lpDosTask) return FALSE;
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/* create pipes */
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/* this happens in the wrong process context, so we have to let the new process
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inherit it... (FIXME: call MZ_InitTask in the right process context) */
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if (!CreatePipe(&(lpDosTask->hReadPipe),&(lpDosTask->hXPipe),&attr,0)) return FALSE;
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if (pipe(write_fd)<0) {
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CloseHandle(lpDosTask->hReadPipe);
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CloseHandle(lpDosTask->hXPipe);
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return FALSE;
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}
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r_req->handle = lpDosTask->hReadPipe;
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server_call_fd( REQ_GET_READ_FD, -1, &lpDosTask->read_pipe );
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w_req->handle = lpDosTask->hXPipe;
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server_call_fd( REQ_GET_WRITE_FD, -1, &x_fd );
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TRACE("win32 pipe: read=%d, write=%d, unix pipe: read=%d, write=%d\n",
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lpDosTask->hReadPipe,lpDosTask->hXPipe,lpDosTask->read_pipe,x_fd);
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TRACE("outbound unix pipe: read=%d, write=%d, pid=%d\n",write_fd[0],write_fd[1],getpid());
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lpDosTask->write_pipe=write_fd[1];
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lpDosTask->hConInput=GetStdHandle(STD_INPUT_HANDLE);
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lpDosTask->hConOutput=GetStdHandle(STD_OUTPUT_HANDLE);
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/* if we have a mapping file, use it */
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fname=lpDosTask->mm_name; farg=NULL;
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if (!fname[0]) {
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/* otherwise, map our own memory image */
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sprintf(fproc,"/proc/%d/mem",getpid());
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sprintf(arg,"%ld",(unsigned long)lpDosTask->img);
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fname=fproc; farg=arg;
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}
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TRACE("Loading DOS VM support module (hmodule=%04x)\n",lpDosTask->hModule);
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if ((child=fork())<0) {
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close(write_fd[0]);
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close(lpDosTask->read_pipe);
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close(lpDosTask->write_pipe);
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close(x_fd);
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CloseHandle(lpDosTask->hReadPipe);
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CloseHandle(lpDosTask->hXPipe);
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return FALSE;
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}
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if (child!=0) {
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/* parent process */
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int ret;
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close(write_fd[0]);
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close(x_fd);
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lpDosTask->task=child;
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/* wait for child process to signal readiness */
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while (1) {
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if (read(lpDosTask->read_pipe,&ret,sizeof(ret))==sizeof(ret)) break;
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if ((errno==EINTR)||(errno==EAGAIN)) continue;
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/* failure */
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ERR("dosmod has failed to initialize\n");
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if (lpDosTask->mm_name[0]!=0) unlink(lpDosTask->mm_name);
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return FALSE;
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}
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/* the child has now mmaped the temp file, it's now safe to unlink.
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* do it here to avoid leaving a mess in /tmp if/when Wine crashes... */
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if (lpDosTask->mm_name[0]!=0) unlink(lpDosTask->mm_name);
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/* start simulated system timer */
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MZ_InitTimer(lpDosTask,ret);
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if (ret<2) {
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ERR("dosmod version too old! Please install newer dosmod properly\n");
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ERR("If you don't, the new dosmod event handling system will not work\n");
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}
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/* all systems are now go */
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} else {
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/* child process */
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close(lpDosTask->read_pipe);
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close(lpDosTask->write_pipe);
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/* put our pipes somewhere dosmod can find them */
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dup2(write_fd[0],0); /* stdin */
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dup2(x_fd,1); /* stdout */
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/* enable signals */
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SIGNAL_MaskAsyncEvents(FALSE);
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/* now load dosmod */
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/* check argv[0]-derived paths first, since the newest dosmod is most likely there
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* (at least it was once for Andreas Mohr, so I decided to make it easier for him) */
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fpath=strrchr(strcpy(path,Options.argv0),'/');
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if (fpath) {
|
|
strcpy(fpath,"/dosmod");
|
|
execl(path,fname,farg,NULL);
|
|
strcpy(fpath,"/loader/dos/dosmod");
|
|
execl(path,fname,farg,NULL);
|
|
}
|
|
/* okay, it wasn't there, try in the path */
|
|
execlp("dosmod",fname,farg,NULL);
|
|
/* last desperate attempts: current directory */
|
|
execl("dosmod",fname,farg,NULL);
|
|
/* and, just for completeness... */
|
|
execl("loader/dos/dosmod",fname,farg,NULL);
|
|
/* if failure, exit */
|
|
ERR("Failed to spawn dosmod, error=%s\n",strerror(errno));
|
|
exit(1);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL MZ_CreateProcess( HFILE hFile, OFSTRUCT *ofs, LPCSTR cmdline, LPCSTR env,
|
|
LPSECURITY_ATTRIBUTES psa, LPSECURITY_ATTRIBUTES tsa,
|
|
BOOL inherit, DWORD flags, LPSTARTUPINFOA startup,
|
|
LPPROCESS_INFORMATION info )
|
|
{
|
|
LPDOSTASK lpDosTask = NULL; /* keep gcc from complaining */
|
|
HMODULE16 hModule;
|
|
PDB *pdb = PROCESS_Current();
|
|
TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
|
|
NE_MODULE *pModule = pTask ? NE_GetPtr( pTask->hModule ) : NULL;
|
|
int alloc = !(pModule && pModule->dos_image);
|
|
|
|
if (alloc && (lpDosTask = calloc(1, sizeof(DOSTASK))) == NULL) {
|
|
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
|
|
return FALSE;
|
|
}
|
|
|
|
if ((!env)&&pdb) env = pdb->env_db->environ;
|
|
if (alloc) {
|
|
if ((hModule = MODULE_CreateDummyModule(ofs, NULL)) < 32) {
|
|
SetLastError(hModule);
|
|
return FALSE;
|
|
}
|
|
lpDosTask->hModule = hModule;
|
|
|
|
pModule = (NE_MODULE *)GlobalLock16(hModule);
|
|
pModule->lpDosTask = lpDosTask;
|
|
|
|
lpDosTask->img=NULL; lpDosTask->mm_name[0]=0; lpDosTask->mm_fd=-1;
|
|
} else lpDosTask=pModule->lpDosTask;
|
|
if (!MZ_LoadImage( hFile, ofs, cmdline, env, lpDosTask, pModule )) {
|
|
if (alloc) {
|
|
if (lpDosTask->mm_name[0]!=0) {
|
|
if (lpDosTask->img!=NULL) munmap(lpDosTask->img,0x110000-START_OFFSET);
|
|
if (lpDosTask->mm_fd>=0) close(lpDosTask->mm_fd);
|
|
unlink(lpDosTask->mm_name);
|
|
} else
|
|
if (lpDosTask->img!=NULL) VirtualFree(lpDosTask->img,0x110000,MEM_RELEASE);
|
|
}
|
|
return FALSE;
|
|
}
|
|
if (alloc) {
|
|
pModule->dos_image = lpDosTask->img;
|
|
if (!MZ_InitTask( lpDosTask )) {
|
|
MZ_KillModule( lpDosTask );
|
|
/* FIXME: cleanup hModule */
|
|
SetLastError(ERROR_GEN_FAILURE);
|
|
return FALSE;
|
|
}
|
|
inherit = TRUE; /* bad hack for inheriting the CreatePipe... */
|
|
if (!PROCESS_Create( pModule, cmdline, env,
|
|
psa, tsa, inherit, flags, startup, info ))
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
void MZ_KillModule( LPDOSTASK lpDosTask )
|
|
{
|
|
DOSEVENT *event,*p_event;
|
|
DOSSYSTEM *sys,*p_sys;
|
|
|
|
TRACE("killing DOS task\n");
|
|
if (lpDosTask->mm_name[0]!=0) {
|
|
munmap(lpDosTask->img,0x110000-START_OFFSET);
|
|
close(lpDosTask->mm_fd);
|
|
} else VirtualFree(lpDosTask->img,0x110000,MEM_RELEASE);
|
|
close(lpDosTask->read_pipe);
|
|
close(lpDosTask->write_pipe);
|
|
CloseHandle(lpDosTask->hReadPipe);
|
|
CloseHandle(lpDosTask->hXPipe);
|
|
kill(lpDosTask->task,SIGTERM);
|
|
/* free memory allocated for events and systems */
|
|
#define DFREE(var,pvar,svar) \
|
|
var = lpDosTask->svar; \
|
|
while (var) { \
|
|
if (var->data) free(var->data); \
|
|
pvar = var->next; free(var); var = pvar; \
|
|
}
|
|
|
|
DFREE(event,p_event,pending)
|
|
DFREE(event,p_event,current)
|
|
DFREE(sys,p_sys,sys)
|
|
|
|
#undef DFREE
|
|
|
|
#if 0
|
|
/* FIXME: this seems to crash */
|
|
if (lpDosTask->dpmi_sel)
|
|
SELECTOR_FreeBlock(lpDosTask->dpmi_sel, 1);
|
|
#endif
|
|
}
|
|
|
|
LPDOSTASK MZ_Current( void )
|
|
{
|
|
TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
|
|
NE_MODULE *pModule = pTask ? NE_GetPtr( pTask->hModule ) : NULL;
|
|
|
|
GlobalUnlock16( GetCurrentTask() );
|
|
|
|
if (pModule)
|
|
return pModule->lpDosTask;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#else /* !MZ_SUPPORTED */
|
|
|
|
BOOL MZ_CreateProcess( HFILE hFile, OFSTRUCT *ofs, LPCSTR cmdline, LPCSTR env,
|
|
LPSECURITY_ATTRIBUTES psa, LPSECURITY_ATTRIBUTES tsa,
|
|
BOOL inherit, DWORD flags, LPSTARTUPINFOA startup,
|
|
LPPROCESS_INFORMATION info )
|
|
{
|
|
WARN("DOS executables not supported on this architecture\n");
|
|
SetLastError(ERROR_BAD_FORMAT);
|
|
return FALSE;
|
|
}
|
|
|
|
LPDOSTASK MZ_Current( void )
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#endif
|