Added a hex viewer, Fixed a bug in dosfs
This commit is contained in:
Lucia Ceionia
parent
964cbcd68d
commit
ddadeed70c
@ -13,16 +13,23 @@
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#include "../interrupt.h"
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#include "../v86defs.h"
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// all reading at 0x23000 - be careful!
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uint32_t DFS_ReadSector(uint8_t unit, uint8_t *buffer, uint32_t sector, uint32_t count) {
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// NOTE If the buffer provided is outside the 0x20000-0x2FE00 range,
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// the function will use that buffer for the Virtual 8086 process
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// and copy to the other buffer after
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uint8_t *v86buf = buffer;
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if ((uintptr_t)v86buf < 0x20000 || (uintptr_t)v86buf > 0x2FE00)
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v86buf = (uint8_t *)0x20000;
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v86disk_addr_packet.start_block = sector;
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v86disk_addr_packet.blocks = count;
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v86disk_addr_packet.transfer_buffer =
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(uintptr_t)buffer & 0x000F |
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(((uintptr_t)buffer & 0xFFFF0) << 12);
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(uintptr_t)v86buf & 0x000F |
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(((uintptr_t)v86buf & 0xFFFF0) << 12);
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union V86Regs_t regs;
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FARPTR v86_entry = i386LinearToFp(v86DiskRead);
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enter_v86(0x8000, 0xFF00, FP_SEG(v86_entry), FP_OFF(v86_entry), ®s);
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if (v86buf != buffer)
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memcpy(buffer, v86buf, count * SECTOR_SIZE);
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return 0;
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}
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uint32_t DFS_WriteSector(uint8_t unit, uint8_t *buffer, uint32_t sector, uint32_t count) {
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@ -1038,8 +1045,9 @@ void DFS_Seek(PFILEINFO fileinfo, uint32_t offset, uint8_t *scratch)
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// seek by clusters
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// larwe 9/30/06 bugfix changed .rem to .quot in both div calls
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// Lucia 2/4/2023 'fileinfo->pointer + offset' into just 'offset' for bugfix
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while (div(fileinfo->pointer, fileinfo->volinfo->secperclus * SECTOR_SIZE).quot !=
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div(fileinfo->pointer + offset, fileinfo->volinfo->secperclus * SECTOR_SIZE).quot) {
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div(offset, fileinfo->volinfo->secperclus * SECTOR_SIZE).quot) {
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fileinfo->cluster = DFS_GetFAT(fileinfo->volinfo, scratch, &tempint, fileinfo->cluster);
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// Abort if there was an error
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@ -86,8 +86,8 @@ int strcmp(const char *l, const char *r)
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/* STDLIB DIV FUNCTIONS */
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typedef struct { int quot, rem; } div_t;
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typedef struct { long quot, rem; } ldiv_t;
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typedef struct { int32_t quot, rem; } div_t;
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typedef struct { int64_t quot, rem; } ldiv_t;
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div_t div(int num, int den)
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{
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return (div_t){ num/den, num%den };
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@ -14,6 +14,8 @@ call error_environment
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hlt
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jmp .hlt
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global _gpf_eax_save
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_gpf_eax_save: dd 0
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extern gpf_handler_v86
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global gpfHandler
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gpfHandler:
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189
kernel.c
189
kernel.c
@ -55,7 +55,16 @@ uint32_t get_cr4() {
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return reg;
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}
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extern char _edata, _v86code, _ev86code, _bstart, _bend, _loadusercode, _usercode, _eusercode;
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extern char _loadusercode, _usercode, _eusercode;
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void LoadUser() {
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// Put Usermode code in proper place based on linker
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char *s = &_loadusercode;
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char *d = &_usercode;
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while (d < &_eusercode)
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*d++ = *s++;
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}
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extern char _edata, _v86code, _ev86code, _bstart, _bend;
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void setup_binary() {
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// Put V86 code in proper place based on linker
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char *s = &_edata;
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@ -63,11 +72,7 @@ void setup_binary() {
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while (d < &_ev86code)
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*d++ = *s++;
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// Put Usermode code in proper place based on linker
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s = &_loadusercode;
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d = &_usercode;
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while (d < &_eusercode)
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*d++ = *s++;
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LoadUser();
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// Clear BSS area
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for (d = &_bstart; d < &_bend; d++)
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@ -174,41 +179,140 @@ void DrawScreen() {
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vga_text[80+42] = 0x1f00 | 'S';
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vga_text[80+43] = 0x1f00 | ' ';
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vga_text[80+44] = 0x1f00 | '-';
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// Info line (4)
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vga_text = &vga_text[80*4+2];
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printStr("T to run tests - O to view file in hex", vga_text);
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}
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uint32_t OpenVol(VOLINFO *vi) {
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uint8_t *diskReadBuf = (uint8_t *)0x20000;
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uint8_t pactive, ptype;
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uint32_t pstart, psize;
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pstart = DFS_GetPtnStart(0, diskReadBuf, 0, &pactive, &ptype, &psize);
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return DFS_GetVolInfo(0, diskReadBuf, pstart, vi);
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}
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uint32_t OpenDir(uint8_t *path, VOLINFO *vi, DIRINFO *di) {
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uint8_t *diskReadBuf = (uint8_t *)0x20000;
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di->scratch = diskReadBuf;
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return DFS_OpenDir(vi, path, di);
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}
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int32_t fileCount;
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DIRENT *entries = (DIRENT*)0x400000;
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void GetFileList(VOLINFO *vi, DIRINFO *di) {
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uint8_t *diskReadBuf = (uint8_t *)0x20000;
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DIRENT de;
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fileCount = 0;
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while (!DFS_GetNext(vi, di, &de)) {
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if (de.name[0]) {
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uint8_t *d = (uint8_t*)&entries[fileCount];
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uint8_t *s = (uint8_t*)&de;
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for (int i = 0; i < sizeof(DIRENT); i++)
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d[i] = s[i];
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fileCount++;
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}
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}
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}
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uint16_t *nextLine(uint16_t *p) {
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uintptr_t v = (uintptr_t)p;
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return (uint16_t *)(v + (160 - ((v - 0xb8000) % 160)));
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}
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void PrintFileList() {
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uint16_t *vga_text = &((uint16_t *)0xb8000)[80*4+3];
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uint8_t *diskReadBuf = (uint8_t *)0x20000;
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VOLINFO vi;
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uint8_t pactive, ptype;
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uint32_t pstart, psize;
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pstart = DFS_GetPtnStart(0, diskReadBuf, 0, &pactive, &ptype, &psize);
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DFS_GetVolInfo(0, diskReadBuf, pstart, &vi);
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DIRINFO di;
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di.scratch = diskReadBuf;
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DFS_OpenDir(&vi, (uint8_t*)"", &di);
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DIRENT de;
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fileCount = 0;
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while (!DFS_GetNext(&vi, &di, &de)) {
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if (de.name[0]) {
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for (int i = 0; i < 11 && de.name[i]; i++) {
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uint16_t *vga_text = &((uint16_t *)0xb8000)[80*6+3];
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for (int i = 0; i < fileCount; i++) {
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DIRENT *de = &entries[i];
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for (int i = 0; i < 11 && de->name[i]; i++) {
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if (i == 8) { *(uint8_t*)vga_text = ' '; vga_text++; } // space for 8.3
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*(uint8_t *)vga_text = de.name[i];
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*(uint8_t *)vga_text = de->name[i];
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vga_text++;
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}
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vga_text += printStr(" ", vga_text);
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vga_text += printDec((uint32_t)de.filesize_0 + ((uint32_t)de.filesize_1 << 8) + ((uint32_t)de.filesize_2 << 16) + ((uint32_t)de.filesize_3 << 24), vga_text);
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vga_text += printDec((uint32_t)de->filesize_0 +
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((uint32_t)de->filesize_1 << 8) +
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((uint32_t)de->filesize_2 << 16) +
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((uint32_t)de->filesize_3 << 24), vga_text);
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*(uint8_t*)vga_text++ = 'B';
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vga_text = nextLine(vga_text) + 3;
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fileCount++;
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}
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}
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const uint32_t byteCount = 16*24;
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uint8_t diskReadBuf[16*24];
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void FileReadTest(uint8_t *path, VOLINFO *vi) {
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uint32_t err;
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uint16_t *vga_text = (uint16_t *)0xb8000;
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uint8_t *scratch = (uint8_t *)0x20000;
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FILEINFO fi;
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err = DFS_OpenFile(vi, path, DFS_READ, scratch, &fi);
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if (err) {
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vga_text += printStr("Open Error: ", vga_text);
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printDword(err, vga_text);
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return;
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}
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uint32_t successcount;
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uint32_t readOffset = 0, lastReadOffset = -1;
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char cont = 1;
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for (;cont;) {
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if (readOffset != lastReadOffset) {
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vga_text = (uint16_t *)0xb8000;
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for (int i = 0; i < 80*25; i++)
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vga_text[i] = 0x0f00;
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vga_text += printStr((char*)path, vga_text);
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vga_text += printStr(" Up/Down to navigate - E to exit", vga_text);
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vga_text = &((uint16_t*)0xb8000)[80];
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DFS_Seek(&fi, readOffset, scratch);
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if (fi.pointer != readOffset) {
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vga_text += printStr("Seek Error", vga_text);
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return;
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}
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err = DFS_ReadFile(&fi, scratch, diskReadBuf, &successcount, byteCount);
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if (err && err != DFS_EOF) {
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vga_text += printStr("Read Error: ", vga_text);
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printDword(err, vga_text);
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return;
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}
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for (uint32_t i = 0; i < successcount && i < byteCount; i += 16) {
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vga_text += printDword(i + readOffset, vga_text);
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vga_text += printChar(' ', vga_text);
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vga_text += printChar(' ', vga_text);
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for (uint32_t j = 0; j < 16; j++) {
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if (i + j < successcount)
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vga_text += printByte(diskReadBuf[i + j], vga_text);
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else {
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vga_text += printChar(' ', vga_text);
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vga_text += printChar(' ', vga_text);
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}
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vga_text += printChar(' ', vga_text);
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if (j == 8)
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vga_text += printChar(' ', vga_text);
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}
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vga_text += printChar(' ', vga_text);
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vga_text += printChar('|', vga_text);
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for (uint32_t j = 0; j < 16; j++) {
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if (i + j < successcount)
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vga_text += printChar(diskReadBuf[i + j], vga_text);
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else vga_text += printChar(' ', vga_text);
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}
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vga_text += printChar('|', vga_text);
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vga_text = nextLine(vga_text);
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}
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lastReadOffset = readOffset;
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}
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uint16_t key = get_scancode();
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switch (key & 0xff) {
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case 0x50: // down
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if ((readOffset + byteCount) < fi.filelen)
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readOffset += byteCount;
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break;
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case 0x48: // up
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//asm volatile ("xchg %bx,%bx");
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if ((readOffset - byteCount) < fi.filelen)
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readOffset -= byteCount;
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break;
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case 0x12: // e
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cont = 0;
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break;
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default:
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break;
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}
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}
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}
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@ -216,14 +320,22 @@ void FileSelect() {
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fileCount = 5;
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uint16_t *vga_text = (uint16_t *)0xb8000;
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int32_t fileHovered = 0, lastFileHovered = 0;
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for (;;) {
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for (char reload = 1;;) {
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VOLINFO vi; DIRINFO di;
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if (reload) {
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OpenVol(&vi);
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OpenDir((uint8_t*)"", &vi, &di);
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GetFileList(&vi, &di);
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reload = 0;
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}
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PrintFileList();
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if (lastFileHovered != fileHovered) {
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vga_text[80*(4+lastFileHovered)+2] = 0x1f00 | ' ';
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*(uint8_t*)&vga_text[80*(6+lastFileHovered)+2] = ' ';
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lastFileHovered = fileHovered;
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}
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vga_text[80*(4+fileHovered)+2] = 0x1f00 | '>';
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*(uint8_t*)&vga_text[80*(6+fileHovered)+2] = '>';
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uint16_t key = get_scancode();
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uint8_t path[13], tmp, trailingSpace;
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switch (key & 0xff) { // scancode component
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case 0x50: // down
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fileHovered++;
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@ -236,6 +348,23 @@ void FileSelect() {
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case 0x14: // t
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RunTests(vga_text);
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DrawScreen();
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reload = 1;
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break;
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case 0x18: // o
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for (trailingSpace=0, tmp = 0; tmp < 8 && entries[fileHovered].name[tmp]; tmp++) {
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path[tmp] = entries[fileHovered].name[tmp];
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if (entries[fileHovered].name[tmp] == ' ') trailingSpace++;
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else trailingSpace = 0;
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}
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tmp -= trailingSpace;
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path[tmp++] = '.';
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for (int i = 8; i < 11 && entries[fileHovered].name[i]; i++, tmp++) {
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path[tmp] = entries[fileHovered].name[i];
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}
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path[tmp] = 0;
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FileReadTest(path, &vi);
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DrawScreen();
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break;
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default:
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break;
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}
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5
print.c
5
print.c
@ -26,6 +26,11 @@ uintptr_t printStr(char *v, uint16_t *buff) {
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return s - v;
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}
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uintptr_t printChar(char v, uint16_t *buff) {
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*(char*)buff = v;
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return 1;
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}
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uintptr_t printDec(uint32_t v, uint16_t *buff) {
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char b[12];
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char *s = &b[11];
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1
print.h
1
print.h
@ -5,3 +5,4 @@ uintptr_t printWord(uint16_t v, uint16_t *buff);
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uintptr_t printDword(uint32_t v, uint16_t *buff);
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uintptr_t printStr(char *v, uint16_t *buff);
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uintptr_t printDec(uint32_t v, uint16_t *buff);
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uintptr_t printChar(char v, uint16_t *buff);
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12
tests.c
12
tests.c
@ -14,7 +14,16 @@ void TestV86() {
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FARPTR v86_entry = i386LinearToFp(v86Test);
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enter_v86(0x8000, 0xFF00, FP_SEG(v86_entry), FP_OFF(v86_entry), ®s);
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}
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extern char _loadusercode, _usercode, _eusercode;
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void ReloadUser() {
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// Put Usermode code in proper place based on linker
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char *s = &_loadusercode;
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char *d = &_usercode;
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while (d < &_eusercode)
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*d++ = *s++;
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}
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void TestUser() {
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ReloadUser();
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char *vga = jmp_usermode_test();
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for (int i = 0; i < 320; i++) {
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vga[i] = i;
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@ -126,9 +135,6 @@ void RunTests(uint16_t *vga_text) {
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TestDiskRead();
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kbd_wait();
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TestFAT();
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kbd_wait();
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TestFAT();
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kbd_wait();
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vga_text = &((uint16_t*)0xB8000)[80*16];
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vga_text += printStr("Press E for a flagrant system error. Press C to continue... ", vga_text);
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