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Replace UPX trailer in exeflat by the more flexible one from UNSTABLE.

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git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@1327 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Bart Oldeman 2007-05-26 19:35:20 +00:00
parent eeef2f7efd
commit ca4ea74eeb
1 changed files with 35 additions and 26 deletions
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59
utils/exeflat.c
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@ -52,8 +52,6 @@ large portions copied from task.c
#define BUFSIZE 32768u #define BUFSIZE 32768u
#define LENGTH(x) (sizeof(x)/sizeof(x[0]))
typedef struct { typedef struct {
UWORD off, seg; UWORD off, seg;
} farptr; } farptr;
@ -96,6 +94,9 @@ int main(int argc, char **argv)
short silentSegments[20], silentcount = 0, silentdone = 0; short silentSegments[20], silentcount = 0, silentdone = 0;
int UPX = FALSE; int UPX = FALSE;
/* if no arguments provided, show usage and exit */
if (argc < 4) usage();
/* do optional argument processing here */ /* do optional argument processing here */
for (i = 4; i < argc; i++) for (i = 4; i < argc; i++)
{ {
@ -260,7 +261,7 @@ int main(int argc, char **argv)
} }
/* this assumes <= 0xfe00 code in kernel */ /* this assumes <= 0xfe00 code in kernel */
*(short *)&JumpBehindCode[0x1e] += size; *(short *)&JumpBehindCode[0x1e] += (short)size;
fwrite(JumpBehindCode, 1, 0x20, dest); fwrite(JumpBehindCode, 1, 0x20, dest);
} }
@ -283,30 +284,38 @@ int main(int argc, char **argv)
{ {
/* UPX trailer */ /* UPX trailer */
/* hand assembled - so this remains ANSI C ;-) */ /* hand assembled - so this remains ANSI C ;-) */
/* move kernel down to place CONFIG-block, which added above,
at start_seg-2:0 (e.g. 0x5e:0) instead of
start_seg:0 (e.g. 0x60:0) and store there boot drive number
from BL; kernel.asm will then check presence of additional
CONFIG-block at this address. */
static char trailer[] = { /* shift down everything by sizeof JumpBehindCode */ static char trailer[] = { /* shift down everything by sizeof JumpBehindCode */
0xE8, 0x00, 0x00, /* call 103 */ 0xB9, 0x00, 0x00, /* 0 mov cx,offset trailer */
0x59, /* pop cx */ 0x0E, /* 3 push cs */
0x0E, /* push cs */ 0x1F, /* 4 pop ds (=60) */
0x1F, /* pop ds */ 0x8C, 0xC8, /* 5 mov ax,cs */
0x8c, 0xc8, /* mov ax,cs */ 0x48, /* 7 dec ax */
0x48, /* dec ax */ 0x48, /* 8 dec ax */
0x48, /* dec ax */ 0x8E, 0xC0, /* 9 mov es,ax */
0x8e, 0xc0, /* mov es,ax */ 0x93, /* 11 xchg ax,bx (to get al=bl) */
0x31, 0xFF, /* xor di,di */ 0x31, 0xFF, /* 12 xor di,di */
0xBE, 0x00, 0x00, /* mov si,0x00 */ 0xFC, /* 14 cld */
0xFC, /* cld */ 0xAA, /* 15 stosb (store drive number)*/
0xF3, 0xA4, /* rep movsb */ 0x8B, 0xF7, /* 16 mov si,di */
0x26, 0x88, 0x1e, 0x00, 0x00, /* mov es:[0],bl */ 0xF3, 0xA4, /* 18 rep movsb */
0xB8, 0x00, 0x00, /* mov ax,0000h */ 0x1E, /* 20 push ds */
0x8E, 0xD0, /* mov ss,ax */ 0x58, /* 21 pop ax */
0xBC, 0x00, 0x00, /* mov sp,0000h */ 0x05, 0x00, 0x00, /* 22 add ax,... */
0x31, 0xC0, /* xor ax,ax */ 0x8E, 0xD0, /* 25 mov ss,ax */
0x50, /* push ax */ 0xBC, 0x00, 0x00, /* 27 mov sp,... */
0xC3 /* ret */ 0x31, 0xC0, /* 30 xor ax,ax */
0xFF, 0xE0 /* 32 jmp ax */
}; };
*(short *)&trailer[26] = start_seg + header.exInitSS;
*(short *)&trailer[31] = header.exInitSP; *(short *)&trailer[1] = (short)size + 0x20;
fwrite(trailer, 1, sizeof(trailer), dest); *(short *)&trailer[23] = header.exInitSS;
*(short *)&trailer[28] = header.exInitSP;
fwrite(trailer, 1, sizeof trailer, dest);
} }
fclose(dest); fclose(dest);
printf("\nProcessed %d relocations, %d not shown\n", printf("\nProcessed %d relocations, %d not shown\n",