chore: sync repo
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parent
8589a5c433
commit
c682f38209
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@ -2,16 +2,26 @@
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#include <stdio.h>
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#include <coff.h>
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# define BASE_ADDRESS = 0x100000
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static char *prg_name;
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static char *outfile = "a.out";
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typedef struct {
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size_t size;
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uint8_t *raw;
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} Section;
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typedef struct object {
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size_t section_count;
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Section *sections;
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struct object *next;
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} Object;
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typedef struct {
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} Object;
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} Symtab;
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static void
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usage(int retcode)
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@ -36,7 +46,7 @@ usage(int retcode)
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static void
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version(void)
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{
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printf("%s commit %s\n", prg_name, MK_COMMIT);
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printf("%s (%s) %s", prg_name, MK_PACKAGE, MK_COMMIT);
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exit(EXIT_SUCCESS);
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}
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@ -77,49 +87,7 @@ main(int argc, char **argv)
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if (argc <= 1) usage(EXIT_FAILURE);
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fp = fopen(argv[1], "rb");
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if (fp == NULL)
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{
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return (EXIT_FAILURE);
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}
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fread(&fhdr, 1, FILHSZ, fp);
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printf("magic: 0x%hx\n", fhdr.f_magic);
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printf("n section: %hd\n", fhdr.f_nscns);
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printf("symtab: 0x%X\n", fhdr.f_symptr);
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printf("sym entries: %d\n", fhdr.f_nsyms);
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printf("optional hdr size: %hu\n", fhdr.f_opthdr);
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printf("flags: 0x%hx\n", fhdr.f_flags);
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if (fhdr.f_opthdr > 0)
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{
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buffer = malloc(fhdr.f_opthdr);
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fread(buffer, 1, fhdr.f_opthdr, fp);
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free(buffer);
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}
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for (idx = 0; idx < fhdr.f_nscns; idx++)
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{
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fread(&shdr, 1, SCNHSZ, fp);
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printf("Section: %c%c%c%c%c%c%c%c\n", shdr.s_name[0], shdr.s_name[1],shdr.s_name[2],shdr.s_name[3],shdr.s_name[4],shdr.s_name[5],shdr.s_name[6],shdr.s_name[7]);
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printf("\tflags: 0x%x\n", shdr.s_flags);
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printf("\tsize: %d\n", shdr.s_size);
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}
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fseek(fp, fhdr.f_symptr, SEEK_SET);
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for (idx = 0; idx < fhdr.f_nsyms; idx++)
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{
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fread(&entry, 1, SYMESZ, fp);
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printf("name: %c%c%c%c%c%c%c%c\n", entry.n_name[0], entry.n_name[1],entry.n_name[2],entry.n_name[3],entry.n_name[4],entry.n_name[5],entry.n_name[6],entry.n_name[7]);
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printf("\tvalue: %d\n", entry.n_value);
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printf("\tscnum: %hd\n", entry.n_scnum);
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printf("\ttype: %hd\n", entry.n_type);
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printf("\tsclass: %d\n", entry.n_sclass);
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printf("\tnumaux: %d\n", entry.n_numaux);
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}
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fclose(fp);
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return (EXIT_SUCCESS);
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}
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@ -71,6 +71,8 @@ main(int argc, char **argv)
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FILE *fp;
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int idx;
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time_t timedat;
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char *string_table;
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size_t sz_stable;
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#ifndef __stupidos__
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prg_name = basename(argv[0]);
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@ -139,6 +141,22 @@ main(int argc, char **argv)
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printf(" Flags: 0x%hx\n\n", file_header.f_flags);
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}
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if (display_optional_header)
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{
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if (file_header.f_opthdr)
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{
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fread(&aout_header, 1, AOUTHSZ, fp);
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printf("A.out header\n");
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printf(" Magic: %hx\n", aout_header.magic);
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printf(" Entry: 0x%08X\n", aout_header.entry);
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printf("\n");
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}
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else
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{
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printf("There are no optional header.\n\n");
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}
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}
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if (display_sections)
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{
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fseek(fp, file_header.f_opthdr + FILHSZ, SEEK_SET);
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@ -177,6 +195,11 @@ main(int argc, char **argv)
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if (display_symbol_table)
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{
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fseek(fp, 0L, SEEK_END);
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sz_stable = ftell(fp) - file_header.f_symptr + (SYMESZ * file_header.f_nsyms);
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string_table = malloc(sz_stable);
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fseek(fp, file_header.f_symptr + (SYMESZ * file_header.f_nsyms), SEEK_SET);
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fread(string_table, 1, sz_stable, fp);
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printf("Symbol table contains %d entries:\n", file_header.f_nsyms);
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printf(" Num: Value Type Name\n");
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assert(sizeof(SYMENT) == SYMESZ);
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@ -186,7 +209,18 @@ main(int argc, char **argv)
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fread(&sym_entry, 1, SYMESZ, fp);
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memset(name, 0, 9);
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memcpy(name, sym_entry.n_name, 8);
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printf(" %d: %08x %hd %s\n", idx, sym_entry.n_value, sym_entry.n_type, name);
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if (sym_entry.n_zeroes == 0)
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{
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}
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printf(" %2d: %08x %hd ", idx, sym_entry.n_value, sym_entry.n_type);
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if (sym_entry.n_zeroes)
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{
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printf("%s\n", name);
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}
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else
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{
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printf("%s\n", string_table + sym_entry.n_offset);
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}
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}
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}
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@ -81,6 +81,7 @@ fat_search_root:
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ret
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.file_found:
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mov ax, [es:di + fat_entry.start]
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mov ebx, [es:di + fat_entry.size]
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clc
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ret
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@ -55,11 +55,14 @@ _start:
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@@:
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; detect filesystem (FAT12/16 or StpdFS)
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; load kernel from filesystem
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; +---------+--------+---------+
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; | bootsec | sect 1 | stpd sb |
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; +---------+--------+---------+
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; 0 512 1024
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; StupidFS layout
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; +---------+---------+---------....--+----....---+
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; | bootsec | stpd sb | i-nodes ... | data |
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; +---------+---------+---------0...--+----....---+
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; 0 512 1024 XXXX XXXX
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;
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; for now fat12 is asumed
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call fat_load_root
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@ -67,8 +70,12 @@ _start:
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mov si, szKernelFile
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call fat_search_root
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jc .error_not_found
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mov [pKernelStartFat], ax
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mov [uKernelSize], ebx
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push ebx
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mov si, szMsgKernelFound
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call bios_log
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; load fat
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xor ax, ax
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@ -141,9 +148,11 @@ uDrive rb 1
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bDriveLBA db FALSE
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pKernelStartFat dw 0
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uKernelSize dd 0
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szMsgStage2 db "StupidOS Loader", 0
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szKernelFile db "VMSTUPIDSYS", 0
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szMsgKernelFound db "Kernel found, size: %x", 0
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szMsgErrorA20 db "ERROR: can't enable a20 line", 0
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szMsgErrorMemory db "ERROR: can't detect available memory", 0
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szMsgErrorSector db "ERROR: reading sector", CR, LF, 0
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@ -170,6 +179,16 @@ common32:
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; identity map first 1MB
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; map kernel to 0xC000000
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; -----------------------
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mov edi, boot_768_page_table
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mov esi, 0
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mov ecx, 1023
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.1:
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cmp esi, MULTIBOOT_BASE
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jl .2
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.2:
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.3:
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push STPDBOOT_MAGIC
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