| 1 |
39 |
lampret |
#include <stdlib.h>
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| 2 |
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#include "dos.h"
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| 3 |
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#include "go32.h"
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#include <sys/types.h>
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#include "dpmi.h"
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| 7 |
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static union REGS r;
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static struct SREGS s;
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| 10 |
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int _go32_dpmi_allocate_dos_memory(_go32_dpmi_seginfo *info)
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| 11 |
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{
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| 12 |
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r.x.ax = 0x0100;
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| 13 |
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r.x.bx = info->size;
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| 14 |
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int86(0x31, &r, &r);
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| 15 |
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if (r.x.flags & 1)
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| 16 |
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{
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| 17 |
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info->size = r.x.bx;
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| 18 |
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return r.x.ax;
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| 19 |
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}
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| 20 |
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else
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| 21 |
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{
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| 22 |
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info->rm_segment = r.x.ax;
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info->pm_selector = r.x.dx;
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| 24 |
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return 0;
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| 25 |
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}
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| 26 |
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}
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| 28 |
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int _go32_dpmi_free_dos_memory(_go32_dpmi_seginfo *info)
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| 29 |
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{
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| 30 |
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r.x.ax = 0x0101;
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| 31 |
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r.x.dx = info->pm_selector;
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| 32 |
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int86(0x31, &r, &r);
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| 33 |
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if (r.x.flags & 1)
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| 34 |
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{
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| 35 |
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return r.x.ax;
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| 36 |
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}
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| 37 |
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else
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| 38 |
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{
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| 39 |
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return 0;
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| 40 |
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}
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| 41 |
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}
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| 43 |
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int _go32_dpmi_resize_dos_memory(_go32_dpmi_seginfo *info)
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| 44 |
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{
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r.x.ax = 0x0102;
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| 46 |
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r.x.bx = info->size;
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r.x.dx = info->pm_selector;
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int86(0x31, &r, &r);
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if (r.x.flags & 1)
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| 50 |
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{
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info->size = r.x.bx;
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return r.x.ax;
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| 53 |
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}
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else
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{
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| 56 |
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return 0;
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}
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| 58 |
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}
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| 60 |
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int _go32_dpmi_get_real_mode_interrupt_vector(int vector, _go32_dpmi_seginfo *info)
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{
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r.x.ax = 0x0200;
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r.h.bl = vector;
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int86(0x31, &r, &r);
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info->rm_segment = r.x.cx;
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info->rm_offset = r.x.dx;
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return 0;
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}
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| 70 |
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int _go32_dpmi_set_real_mode_interrupt_vector(int vector, _go32_dpmi_seginfo *info)
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| 71 |
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{
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r.x.ax = 0x0201;
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r.h.bl = vector;
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r.x.cx = info->rm_segment;
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r.x.dx = info->rm_offset;
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int86(0x31, &r, &r);
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return 0;
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}
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| 80 |
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int _go32_dpmi_get_protected_mode_interrupt_vector(int vector, _go32_dpmi_seginfo *info)
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{
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r.x.ax = 0x0204;
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r.h.bl = vector;
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int86(0x31, &r, &r);
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info->pm_selector = r.x.cx;
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info->pm_offset = r.x.dx;
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| 87 |
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return 0;
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}
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| 90 |
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int _go32_dpmi_set_protected_mode_interrupt_vector(int vector, _go32_dpmi_seginfo *info)
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| 91 |
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{
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r.x.ax = 0x0205;
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r.h.bl = vector;
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r.x.cx = info->pm_selector;
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r.x.dx = info->pm_offset;
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| 96 |
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int86(0x31, &r, &r);
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| 97 |
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if (r.x.flags & 1)
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| 98 |
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{
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| 99 |
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return r.x.ax;
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| 100 |
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}
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| 101 |
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else
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| 102 |
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{
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| 103 |
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return 0;
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| 104 |
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}
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| 105 |
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}
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| 106 |
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| 107 |
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/* In real DPMI, we enter with only CS known, and SS on a locked 4K stack which
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is *NOT* our SS. We must set up everthing, including a stack swap, then
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restore it the way we found it. C. Sandmann 4-93 */
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| 111 |
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static unsigned char wrapper_intcommon[] = {
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0x1e, /* push ds */
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0x06, /* push es */
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| 114 |
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0x0f, 0xa0, /* push fs */
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| 115 |
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0x0f, 0xa8, /* push gs */
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| 116 |
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0x60, /* pusha */
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| 117 |
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0x66, 0xb8, 0x34, 0x12, /* mov ax,0x1234 */
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| 118 |
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0x8e, 0xd8, /* mov ds,ax */
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| 119 |
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0x8e, 0xc0, /* mov es,ax */
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| 120 |
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0x8e, 0xe0, /* mov fs,ax */
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| 121 |
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0x8e, 0xe8, /* mov gs,ax */
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| 122 |
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0xbb, 0x00, 0x00, 0x00, 0x00, /* mov ebx,_local_stack */
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0xfc, /* cld */
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0x89, 0xe1, /* mov ecx,esp */
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| 125 |
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0x8c, 0xd2, /* mov dx,ss */
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| 126 |
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0x8e, 0xd0, /* mov ss,ax */
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| 127 |
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0x89, 0xdc, /* mov esp,ebx */
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| 128 |
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0x52, /* push edx */
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| 129 |
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0x51, /* push ecx */
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| 130 |
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0xe8, 0x00, 0x00, 0x00, 0x00, /* call _rmih */
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| 131 |
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0x58, /* pop eax */
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| 132 |
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0x5b, /* pop ebx */
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| 133 |
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0x8e, 0xd3, /* mov ss,bx */
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| 134 |
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0x89, 0xc4, /* mov esp,eax */
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| 135 |
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0x61, /* popa */
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| 136 |
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0x0f, 0xa9, /* pop gs */
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| 137 |
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0x0f, 0xa1, /* pop fs */
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| 138 |
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0x07, /* pop es */
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| 139 |
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0x1f /* pop ds */
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| 140 |
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};
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| 141 |
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| 142 |
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static unsigned char wrapper_intiret[] = {
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| 143 |
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0xcf /* iret */
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| 144 |
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};
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| 145 |
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| 146 |
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static unsigned char wrapper_intchain[] = {
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| 147 |
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0x2e, 0xff, 0x2d, 0x00, 0x00, 0x00, 0x00, /* jmp cs:[_old_int+39] */
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| 148 |
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0xcf, /* iret */
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| 149 |
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0x78, 0x56, 0x34, 0x12,
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| 150 |
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0xcd, 0xab
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| 151 |
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};
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| 152 |
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| 153 |
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/* _interrupt_stack_size can be changed globally before calling this routine if
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| 154 |
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needed. Don't change it between calls or you will mess up the malloc chain ! */
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| 155 |
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| 156 |
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unsigned _interrupt_stack_size = 32256;
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| 157 |
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| 158 |
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int _go32_dpmi_chain_protected_mode_interrupt_vector(int vector, _go32_dpmi_seginfo *info)
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| 159 |
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{
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| 160 |
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char *mystack;
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| 161 |
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unsigned char *wrapper = (unsigned char *)malloc(sizeof(wrapper_intcommon) + sizeof(wrapper_intchain));
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| 162 |
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if (wrapper == 0)
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return 0x8015;
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mystack = (char *)malloc(_interrupt_stack_size);
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| 165 |
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if (mystack == 0)
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return 0x8015;
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| 167 |
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| 168 |
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r.x.ax = 0x0204;
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r.h.bl = vector;
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| 170 |
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int86(0x31, &r, &r);
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| 171 |
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| 172 |
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memcpy(wrapper, wrapper_intcommon, sizeof(wrapper_intcommon));
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| 173 |
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memcpy(wrapper+sizeof(wrapper_intcommon), wrapper_intchain, sizeof(wrapper_intchain));
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| 174 |
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*(short *)(wrapper+9) = _go32_my_ds();
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| 175 |
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*(long *)(wrapper+20) = (int)mystack + _interrupt_stack_size;
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| 176 |
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*(long *)(wrapper+36) = info->pm_offset - (int)wrapper - 40;
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| 177 |
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*(long *)(wrapper+sizeof(wrapper_intcommon)+3) = (long)wrapper+sizeof(wrapper_intcommon)+8;
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| 178 |
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*(long *)(wrapper+sizeof(wrapper_intcommon)+8) = r.x.dx;
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| 179 |
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*(short *)(wrapper+sizeof(wrapper_intcommon)+12) = r.x.cx;
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| 180 |
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| 181 |
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r.x.ax = 0x0205;
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| 182 |
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r.h.bl = vector;
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| 183 |
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r.x.cx = _go32_my_cs();
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| 184 |
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r.x.dx = (int)wrapper;
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| 185 |
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int86(0x31, &r, &r);
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| 186 |
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return 0;
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| 187 |
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}
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| 188 |
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| 189 |
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int _go32_dpmi_allocate_iret_wrapper(_go32_dpmi_seginfo *info)
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| 190 |
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{
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| 191 |
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char *mystack;
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| 192 |
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unsigned char *wrapper = (unsigned char *)malloc(sizeof(wrapper_intcommon) + sizeof(wrapper_intiret));
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| 193 |
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if (wrapper == 0)
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| 194 |
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return 0x8015;
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| 195 |
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mystack = (char *)malloc(_interrupt_stack_size);
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| 196 |
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if (mystack == 0)
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| 197 |
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return 0x8015;
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| 198 |
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| 199 |
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memcpy(wrapper, wrapper_intcommon, sizeof(wrapper_intcommon));
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| 200 |
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memcpy(wrapper+sizeof(wrapper_intcommon), wrapper_intiret, sizeof(wrapper_intiret));
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| 201 |
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*(short *)(wrapper+9) = _go32_my_ds();
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| 202 |
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*(long *)(wrapper+20) = (int)mystack + _interrupt_stack_size;
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| 203 |
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*(long *)(wrapper+36) = info->pm_offset - (int)wrapper - 40;
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| 204 |
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| 205 |
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info->pm_offset = (int)wrapper;
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| 206 |
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return 0;
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| 207 |
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}
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| 208 |
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| 209 |
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int _go32_dpmi_free_iret_wrapper(_go32_dpmi_seginfo *info)
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| 210 |
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{
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| 211 |
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char *mystack;
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| 212 |
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char *wrapper = (char *)info->pm_offset;
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| 213 |
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mystack = (char *)(*(long *)(wrapper+20) - _interrupt_stack_size);
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| 214 |
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free(mystack);
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| 215 |
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free(wrapper);
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| 216 |
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return 0;
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| 217 |
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}
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| 218 |
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| 219 |
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int _go32_dpmi_simulate_int(int vector, _go32_dpmi_registers *regs)
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| 220 |
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{
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| 221 |
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r.h.bl = vector;
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| 222 |
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r.h.bh = 0;
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| 223 |
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r.x.cx = 0;
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| 224 |
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r.x.di = (int)regs;
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| 225 |
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if (vector == 0x21 && regs->x.ax == 0x4b00)
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| 226 |
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{
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| 227 |
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r.x.ax = 0xff0a;
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| 228 |
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int86(0x21, &r, &r);
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| 229 |
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}
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| 230 |
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else
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| 231 |
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{
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| 232 |
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r.x.ax = 0x0300;
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| 233 |
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int86(0x31, &r, &r);
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| 234 |
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}
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| 235 |
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if (r.x.flags & 1)
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| 236 |
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{
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| 237 |
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return r.x.ax;
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| 238 |
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}
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| 239 |
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else
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| 240 |
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{
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| 241 |
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return 0;
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| 242 |
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}
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| 243 |
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}
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| 244 |
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| 245 |
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int _go32_dpmi_simulate_fcall(_go32_dpmi_registers *regs)
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| 246 |
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{
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| 247 |
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r.x.ax = 0x0301;
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| 248 |
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r.h.bh = 0;
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| 249 |
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r.x.cx = 0;
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| 250 |
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r.x.di = (int)regs;
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| 251 |
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int86(0x31, &r, &r);
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| 252 |
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if (r.x.flags & 1)
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| 253 |
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{
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| 254 |
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return r.x.ax;
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| 255 |
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}
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| 256 |
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else
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| 257 |
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{
|
| 258 |
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return 0;
|
| 259 |
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}
|
| 260 |
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}
|
| 261 |
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| 262 |
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int _go32_dpmi_simulate_fcall_iret(_go32_dpmi_registers *regs)
|
| 263 |
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{
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| 264 |
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r.x.ax = 0x0302;
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| 265 |
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r.h.bh = 0;
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| 266 |
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r.x.cx = 0;
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| 267 |
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r.x.di = (int)regs;
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| 268 |
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int86(0x31, &r, &r);
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| 269 |
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if (r.x.flags & 1)
|
| 270 |
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{
|
| 271 |
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return r.x.ax;
|
| 272 |
|
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}
|
| 273 |
|
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else
|
| 274 |
|
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{
|
| 275 |
|
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return 0;
|
| 276 |
|
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}
|
| 277 |
|
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}
|
| 278 |
|
|
|
| 279 |
|
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/* Bug here; this needs to be fixed like above with SS & CLD */
|
| 280 |
|
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|
| 281 |
|
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static unsigned char wrapper_common[] = {
|
| 282 |
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0x66, 0x06, /* push es */
|
| 283 |
|
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0x66, 0x1e, /* push ds */
|
| 284 |
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0x66, 0x06, /* push es */
|
| 285 |
|
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0x66, 0x1f, /* pop ds */
|
| 286 |
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0x56, /* push esi */
|
| 287 |
|
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0x57, /* push edi */
|
| 288 |
|
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0xe8, 0x00, 0x00, 0x00, 0x00, /* call _rmcb */
|
| 289 |
|
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0x5f, /* pop edi */
|
| 290 |
|
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0x5e, /* pop esi */
|
| 291 |
|
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0x66, 0x1f, /* pop ds */
|
| 292 |
|
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0x66, 0x07, /* pop es */
|
| 293 |
|
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0xfc, /* cld */
|
| 294 |
|
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0x66, 0x8b, 0x06, /* mov ax,[esi] */
|
| 295 |
|
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0x66, 0x26, 0x89, 0x47, 0x2a, /* mov es:[edi+42],ax */
|
| 296 |
|
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0x66, 0x8b, 0x46, 0x02, /* mov ax,[esi+2] */
|
| 297 |
|
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0x66, 0x26, 0x89, 0x47, 0x2c, /* mov es:[edi+44],ax */
|
| 298 |
|
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};
|
| 299 |
|
|
|
| 300 |
|
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static unsigned char wrapper_retf[] = {
|
| 301 |
|
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0x66, 0x26, 0x83, 0x47, 0x2e, 0x04, /* add es:[edi+46],0x4 */
|
| 302 |
|
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0xcf /* iret */
|
| 303 |
|
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};
|
| 304 |
|
|
|
| 305 |
|
|
static unsigned char wrapper_iret[] = {
|
| 306 |
|
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0x66, 0x8b, 0x46, 0x04, /* mov ax,[esi+4] */
|
| 307 |
|
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0x66, 0x26, 0x89, 0x47, 0x20, /* mov es:[edi+32],ax */
|
| 308 |
|
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0x66, 0x26, 0x83, 0x47, 0x2e, 0x06, /* add es:[edi+46],0x6 */
|
| 309 |
|
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0xcf /* iret */
|
| 310 |
|
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};
|
| 311 |
|
|
|
| 312 |
|
|
int _go32_dpmi_allocate_real_mode_callback_retf(_go32_dpmi_seginfo *info, _go32_dpmi_registers *regs)
|
| 313 |
|
|
{
|
| 314 |
|
|
unsigned char *wrapper = (unsigned char *)malloc(sizeof(wrapper_common) + sizeof(wrapper_retf));
|
| 315 |
|
|
if (wrapper == 0)
|
| 316 |
|
|
return 0x8015;
|
| 317 |
|
|
|
| 318 |
|
|
memcpy(wrapper, wrapper_common, sizeof(wrapper_common));
|
| 319 |
|
|
memcpy(wrapper+sizeof(wrapper_common), wrapper_retf, sizeof(wrapper_retf));
|
| 320 |
|
|
*(long *)(wrapper+11) = info->pm_offset - (int)wrapper - 15;
|
| 321 |
|
|
info->size = (int)wrapper;
|
| 322 |
|
|
|
| 323 |
|
|
r.x.ax = 0x0303;
|
| 324 |
|
|
r.x.si = (int)wrapper;
|
| 325 |
|
|
r.x.di = (int)regs;
|
| 326 |
|
|
s.ds = _go32_my_cs();
|
| 327 |
|
|
s.es = _go32_my_ds();
|
| 328 |
|
|
s.fs = 0;
|
| 329 |
|
|
s.gs = 0;
|
| 330 |
|
|
int86x(0x31, &r, &r, &s);
|
| 331 |
|
|
if (r.x.flags & 1)
|
| 332 |
|
|
{
|
| 333 |
|
|
return r.x.ax;
|
| 334 |
|
|
}
|
| 335 |
|
|
else
|
| 336 |
|
|
{
|
| 337 |
|
|
info->rm_segment = r.x.cx;
|
| 338 |
|
|
info->rm_offset = r.x.dx;
|
| 339 |
|
|
return 0;
|
| 340 |
|
|
}
|
| 341 |
|
|
}
|
| 342 |
|
|
|
| 343 |
|
|
int _go32_dpmi_allocate_real_mode_callback_iret(_go32_dpmi_seginfo *info, _go32_dpmi_registers *regs)
|
| 344 |
|
|
{
|
| 345 |
|
|
unsigned char *wrapper = (unsigned char *)malloc(sizeof(wrapper_common) + sizeof(wrapper_iret));
|
| 346 |
|
|
if (wrapper == 0)
|
| 347 |
|
|
return 0x8015;
|
| 348 |
|
|
|
| 349 |
|
|
memcpy(wrapper, wrapper_common, sizeof(wrapper_common));
|
| 350 |
|
|
memcpy(wrapper+sizeof(wrapper_common), wrapper_iret, sizeof(wrapper_iret));
|
| 351 |
|
|
*(long *)(wrapper+11) = info->pm_offset - (int)wrapper - 15;
|
| 352 |
|
|
info->size = (int)wrapper;
|
| 353 |
|
|
|
| 354 |
|
|
r.x.ax = 0x0303;
|
| 355 |
|
|
r.x.si = (int)wrapper;
|
| 356 |
|
|
r.x.di = (int)regs;
|
| 357 |
|
|
s.ds = _go32_my_cs();
|
| 358 |
|
|
s.es = _go32_my_ds();
|
| 359 |
|
|
s.fs = 0;
|
| 360 |
|
|
s.gs = 0;
|
| 361 |
|
|
int86x(0x31, &r, &r, &s);
|
| 362 |
|
|
if (r.x.flags & 1)
|
| 363 |
|
|
{
|
| 364 |
|
|
return r.x.ax;
|
| 365 |
|
|
}
|
| 366 |
|
|
else
|
| 367 |
|
|
{
|
| 368 |
|
|
info->rm_segment = r.x.cx;
|
| 369 |
|
|
info->rm_offset = r.x.dx;
|
| 370 |
|
|
return 0;
|
| 371 |
|
|
}
|
| 372 |
|
|
}
|
| 373 |
|
|
|
| 374 |
|
|
int _go32_dpmi_free_real_mode_callback(_go32_dpmi_seginfo *info)
|
| 375 |
|
|
{
|
| 376 |
|
|
free((char *)info->size);
|
| 377 |
|
|
r.x.ax = 0x0304;
|
| 378 |
|
|
r.x.cx = info->rm_segment;
|
| 379 |
|
|
r.x.dx = info->rm_offset;
|
| 380 |
|
|
int86(0x31, &r, &r);
|
| 381 |
|
|
if (r.x.flags & 1)
|
| 382 |
|
|
{
|
| 383 |
|
|
return r.x.ax;
|
| 384 |
|
|
}
|
| 385 |
|
|
else
|
| 386 |
|
|
{
|
| 387 |
|
|
return 0;
|
| 388 |
|
|
}
|
| 389 |
|
|
}
|
| 390 |
|
|
|
| 391 |
|
|
int _go32_dpmi_get_free_memory_information(_go32_dpmi_meminfo *info)
|
| 392 |
|
|
{
|
| 393 |
|
|
r.x.ax = 0x0500;
|
| 394 |
|
|
r.x.di = (int)info;
|
| 395 |
|
|
int86(0x31, &r, &r);
|
| 396 |
|
|
return 0;
|
| 397 |
|
|
}
|
| 398 |
|
|
|
| 399 |
|
|
u_long _go32_dpmi_remaining_physical_memory()
|
| 400 |
|
|
{
|
| 401 |
|
|
_go32_dpmi_meminfo info;
|
| 402 |
|
|
_go32_dpmi_get_free_memory_information(&info);
|
| 403 |
|
|
if (info.available_physical_pages)
|
| 404 |
|
|
return info.available_physical_pages * 4096;
|
| 405 |
|
|
return info.available_memory;
|
| 406 |
|
|
}
|
| 407 |
|
|
|
| 408 |
|
|
u_long _go32_dpmi_remaining_virtual_memory()
|
| 409 |
|
|
{
|
| 410 |
|
|
_go32_dpmi_meminfo info;
|
| 411 |
|
|
_go32_dpmi_get_free_memory_information(&info);
|
| 412 |
|
|
return info.available_memory;
|
| 413 |
|
|
}
|
