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e08c6968ef
kolibrios/programs/develop/ktcc/trunk/source/tccmeos.c
turbocat e08c6968ef ktcc: rollback to r9529 
git-svn-id: svn://kolibrios.org@9558 a494cfbc-eb01-0410-851d-a64ba20cac60
2022-01-02 12:16:17 +00:00

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/*
* TCCMEOS.C - KolibriOS/MenuetOS file output for the TinyC Compiler
*
* Copyright (c) 2006 Andrey Khalyavin
* Copyright (c) 2021 Coldy (KX extension)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef TCC_TARGET_KX
int undef_sym_flag=0;
#endif
typedef struct {
char magic[8];
int version;
int entry_point;
int image_size;
int memory_size;
int stack;
int params;
int argv;
} IMAGE_MEOS_FILE_HEADER,*PIMAGE_MEOS_FILE_HEADER;
typedef struct _meos_section_info{
int sh_addr;
void* data;
int data_size;
int sec_num;
struct _meos_section_info* next;
} meos_section_info;
#ifdef TCC_TARGET_KX
typedef struct {
void* data;
int data_size;
} kx_import_table;
#endif
typedef struct {
TCCState* s1;
IMAGE_MEOS_FILE_HEADER header;
meos_section_info* code_sections;
meos_section_info* data_sections;
#ifdef TCC_TARGET_KX
kx_import_table* imp_table;
#endif
meos_section_info* bss_sections;
} me_info;
#ifdef TCC_TARGET_KX
void kx_init(me_info* me);
void kx_build_imports(me_info* me);
long kx_get_header_length(me_info* me);
void kx_write_header(me_info* me, FILE* f);
void kx_write_imports(me_info* me, FILE* f);
void kx_free(me_info* me);
#endif
int tcc_output_dbgme(const char *filename, me_info* me);
meos_section_info* findsection(me_info* me,int num)
{
meos_section_info* si;
for(si=me->code_sections;si;si=si->next)
{
if (si->sec_num==num)
return si;
}
for (si=me->data_sections;si;si=si->next)
{
if (si->sec_num==num)
return si;
}
for (si=me->bss_sections;si;si=si->next)
{
if (si->sec_num==num)
return si;
}
return (meos_section_info*)0;
}
void build_reloc(me_info* me)
{
int flag;
Elf32_Rel *rel = 0, *rel_ = 0, *rel_end = 0;
Section *sr;
meos_section_info* s;
meos_section_info* ss;
s=me->code_sections;
rel=0;
rel_end=0;
flag=0;
for(;;)
{
sr=me->s1->sections[s->sec_num]->reloc;
if (sr)
{
rel = (Elf32_Rel *) sr->data;
rel_end = (Elf32_Rel *) (sr->data + sr->data_offset);
}
rel_=rel;
while (rel_<rel_end){
rel=rel_;
int type = ELF32_R_TYPE(rel->r_info);
rel_=rel+1;
if (type != R_386_PC32 && type != R_386_32)
continue;
int sym = ELF32_R_SYM(rel->r_info);
if (sym>symtab_section->data_offset/sizeof(Elf32_Sym))
continue;
Elf32_Sym* esym = ((Elf32_Sym *)symtab_section->data)+sym;
int sect=esym->st_shndx;
int sh_addr;
ss=findsection(me,sect);
if (ss==0)
{
const char *sym_name = strtab_section->data + esym->st_name;
#ifdef TCC_TARGET_KX
int sym_index = find_elf_sym(me->s1->dynsymtab_section, sym_name);
Elf32_Sym* dyn_sym;
if (sym_index == 0) {
#else
undef_sym_flag=1;
#endif
tcc_error_noabort("undefined symbol '%s'", sym_name);
continue;
#ifdef TCC_TARGET_KX
}
dyn_sym = &((ElfW(Sym) *)me->s1->dynsymtab_section->data)[sym_index];
sh_addr = dyn_sym->st_value;
if (sh_addr == 0) {
tcc_error_noabort("symbol '%s' has zero value", sym_name);
continue;
}
#endif
}
else
sh_addr = ss->sh_addr;
if (rel->r_offset>s->data_size)
continue;
if (type==R_386_PC32)
*(int*)(rel->r_offset+s->data)+=/*ss->*/sh_addr+esym->st_value-rel->r_offset-s->sh_addr;
else if (type==R_386_32)
*(int*)(rel->r_offset+s->data)+=/*ss->*/sh_addr+esym->st_value;
}
rel=rel_;
s=s->next;
if (s==0) // what about multiple BSS sections ?
{
if (flag) break;
s=me->data_sections;
if (s==0) break;
flag=1;
continue;
}
}
}
void assign_addresses(me_info* me)
{
int i;
meos_section_info* si;
for (i=1;i<me->s1->nb_sections;i++)
{
Section* s=me->s1->sections[i];
if (strcmp(".text",s->name)==0)
{
si=tcc_malloc(sizeof(meos_section_info));
si->data=s->data;
si->data_size=s->data_offset;
si->next=me->code_sections;
si->sec_num=i;
me->code_sections=si;
continue;
}
if (strcmp(".data",s->name)==0)
{
si=tcc_malloc(sizeof(meos_section_info));
si->data=s->data;
si->data_size=s->data_offset;
si->next=me->data_sections;
si->sec_num=i;
me->data_sections=si;
continue;
}
if (strcmp(".bss",s->name)==0)
{
si=tcc_malloc(sizeof(meos_section_info));
si->data=s->data;
si->data_size=s->data_offset;
si->next=me->bss_sections;
si->sec_num=i;
me->bss_sections=si;
continue;
}
}
int addr;
addr=sizeof(IMAGE_MEOS_FILE_HEADER);
#ifdef TCC_TARGET_KX
addr += kx_get_header_length(me);
#endif
for (si=me->code_sections;si;si=si->next)
{
si->sh_addr=addr;
addr+=si->data_size;
}
for (si=me->data_sections;si;si=si->next)
{
si->sh_addr=addr;
addr+=si->data_size;
}
me->header.image_size=addr;
#ifdef TCC_TARGET_KX
kx_build_imports(me);
addr = me->header.image_size;
#endif
for (si=me->bss_sections;si;si=si->next)
{
si->sh_addr=addr;
addr+=si->data_size;
}
if (me->s1->pe_stack_size < 4096)
addr+=4096;
else
addr += me->s1->pe_stack_size;
addr=(addr+4)&(~3);
me->header.stack=addr;
me->header.memory_size=addr;
build_reloc(me);
}
const char *tcc_get_symbol_name(int st_name)
// return string by index from stringtable section
{
const char *sym_name = strtab_section->data + st_name;
return sym_name;
}
int tcc_find_symbol_me(me_info* me, const char *sym_name)
{
int i;
int symtab;
int strtab;
symtab=0;
strtab=0;
for (i=1;i<me->s1->nb_sections;i++)
{
Section* s;
s=me->s1->sections[i];
if (strcmp(s->name,".symtab")==0)
{
symtab=i;
}
if (strcmp(s->name,".strtab")==0)
{
strtab=i;
}
}
if (symtab==0 || strtab==0)
{
tcc_error_noabort("undefined sections .symtab or .strtab on linking '%s'", sym_name);
return 0;
}
Elf32_Sym* s,*se;
char* name;
s=(Elf32_Sym*)me->s1->sections[symtab]->data;
se=(Elf32_Sym*)(((void*)s)+me->s1->sections[symtab]->data_offset);
name=(char*)me->s1->sections[strtab]->data;
while (s<se)
{
if (strcmp(name+s->st_name,sym_name)==0)
{
return s->st_value+findsection(me,s->st_shndx)->sh_addr;
}
s++;
}
tcc_error_noabort("undefined symbol '%s'", sym_name);
return 0;
}
const char* me_magic="MENUET01";
int tcc_output_me(TCCState* s1,const char *filename)
{
me_info me;
int i;
FILE* f;
//printf("%d\n",s1->nb_sections);
memset(&me,0,sizeof(me));
me.s1=s1;
#ifdef TCC_TARGET_KX
kx_init(&me);
#endif
relocate_common_syms();
assign_addresses(&me);
#ifndef TCC_TARGET_KX
if(undef_sym_flag){
tcc_error("Linker error!");
}
#endif
if (s1->do_debug)
tcc_output_dbgme(filename, &me);
me.header.entry_point=tcc_find_symbol_me(&me,"start");
me.header.params= tcc_find_symbol_me(&me,"__argv"); // <--
me.header.argv= tcc_find_symbol_me(&me,"__path"); // <--
if((f=fopen(filename,"wb"))==NULL){
tcc_error("could not create '%s': %s", filename, strerror(errno));
}
for (i=0;i<8;i++)
me.header.magic[i]=me_magic[i];
fwrite(&me.header,1,sizeof(IMAGE_MEOS_FILE_HEADER),f);
#ifdef TCC_TARGET_KX
kx_write_header(&me, f);
#endif
meos_section_info* si;
for(si=me.code_sections;si;si=si->next)
fwrite(si->data,1,si->data_size,f);
for (si=me.data_sections;si;si=si->next)
fwrite(si->data,1,si->data_size,f);
#ifdef TCC_TARGET_KX
kx_write_imports(&me, f);
kx_free(&me);
#else
if (!s1->nobss)
{
for (si=me.bss_sections;si;si=si->next)
{
if (si->data == NULL)
{
// printf("\nError! BSS data is NULL! size:%i",(int)si->data_size);
si->data = calloc(si->data_size, 1);
}
fwrite(si->data, 1, si->data_size, f);
}
}
/*
if (me.bss_sections) // Siemargl testin, what we lose
{
tcc_error_noabort("We lose .BSS section when linking KOS32 executable");
}
*/
#endif
fclose(f);
return 0;
}
#if !defined(_WIN32) && !defined(TCC_TARGET_MEOS_LINUX)
static inline int get_current_folder(char* buf, int bufsize){
register int val;
asm volatile ("int $0x40":"=a"(val):"a"(30), "b"(2), "c"(buf), "d"(bufsize));
return val;
}
char *getcwd(char *buf, size_t size)
{
int rc = get_current_folder(buf, size);
if (rc > size)
{
errno = ERANGE;
return 0;
}
else
return buf;
}
#endif
static FILE *src_file;
static int next_src_line;
void close_source_file()
{
if (src_file)
fclose(src_file);
src_file = NULL;
}
void load_source_file(char *fname)
{
close_source_file();
src_file = fopen(fname,"rt");
if (!src_file) return;
next_src_line = 1;
}
int get_src_lines(char *buf, int sz, int start, int end)
// 1 if read
{
char line[255], *ch;
strcpy(buf, "");
if (!src_file) return 0;
while (next_src_line < start) // skip
{
ch = fgets(line, sizeof line, src_file);
if (!ch) return 0;
next_src_line++;
}
while (next_src_line <= end)
{
ch = fgets(line, sizeof line, src_file);
if (!ch) return 0;
next_src_line++;
strncat(buf, line, sz - strlen(buf) - 1);
}
// remove newlines
for (ch = buf; *ch; ch++)
if (strchr("\t\n\r", *ch)) *ch = ' ';
return 1;
}
int tcc_output_dbgme(const char *filename, me_info* me)
// by Siemargl. Writes filename.dbg file for source code level debuggin with MTDBG
// return 1 on error
{
FILE *fdbg;
char fname[400],
buf[80]; // no more fits in mtdbg string
strcpy(fname, filename);
strcat(fname, ".dbg");
fdbg = fopen(fname,"wt");
if (!fdbg) return 1;
meos_section_info *si, *ss;
fputs(".text\n", fdbg); // just for mtbg
// print symbol table with resolved addresses
Elf32_Sym* esym;
for (esym = (Elf32_Sym*)symtab_section->data; esym <= (Elf32_Sym*)(symtab_section->data + symtab_section->data_offset); esym++)
{
if (esym->st_info == 0 || esym->st_info == 4) continue;
int sect = esym->st_shndx;
ss = findsection(me, sect);
const char *sym_name = strtab_section->data + esym->st_name;
if (ss == 0)
{
fprintf(fdbg, "undefined symbol '%s' type(%d)\n", sym_name, esym->st_info);
continue;
}
fprintf(fdbg, "0x%X %s\n", ss->sh_addr + esym->st_value, sym_name); // removed type(%d) esym->st_info
}
fputs(".text source code links\n", fdbg); // just for mtbg
// print symbol table with resolved addresses
Stab_Sym *stab;
char *str = "", *cur_file = "???", cur_fun[255];
int cur_line = 0, cur_fun_addr = 0, fun_flag = 0;
strcpy(cur_fun, "fn???");
for (stab = (Stab_Sym*)stab_section->data; stab <= (Stab_Sym*)(stab_section->data + stab_section->data_offset); stab++)
{
str = "";
switch(stab->n_type)
{
case 100: // source file, or path
if (stab->n_strx)
{
cur_file = stabstr_section->data + stab->n_strx;
load_source_file(cur_file);
}
else
cur_file = "???";
strcpy(cur_fun, "fn???");
cur_line = 0;
cur_fun_addr = 0;
fun_flag = 0;
break;
case 36: // func
cur_fun_addr = 0;
if (stab->n_strx)
{
strcpy(cur_fun, stabstr_section->data + stab->n_strx);
str = strchr(cur_fun, ':');
if (str) *str = '\0';
cur_fun_addr = tcc_find_symbol_me(me, cur_fun);
cur_line = stab->n_desc;
fun_flag = 1;
//fprintf(fdbg, "0x%X %s() line(%d)\n", cur_fun_addr, cur_fun, cur_line); // commented as conflicted with direct address
}
else
strcpy(cur_fun, "fn???");
break;
case 68: // N_SLINE
if (stab->n_value == 0 ) continue; // skip zero offset line
if (fun_flag) // skip string {, as duplicates address
{
fun_flag = 0;
continue;
}
int line;
if (stab->n_desc > cur_line)
line = cur_line + 1;
else
line = cur_line;
//fprintf(fdbg, "0x%X LINES %d-%d \n", cur_fun_addr + stab->n_value, line, stab->n_desc);
if (get_src_lines(buf, sizeof buf, line, stab->n_desc))
fprintf(fdbg, "0x%X %s\n", cur_fun_addr + stab->n_value, buf);
cur_line = stab->n_desc;
break;
default:
continue;
}
/*
if (stab->n_strx)
str = stabstr_section->data + stab->n_strx;
fprintf(fdbg, "0x%X type(%d) str(%s) desc(%d)\n", stab->n_value, stab->n_type, str, stab->n_desc);
*/
}
/* for(; si; si = si->next)
{
Section *sr;
Elf32_Rel *rel, *rel_end;
for(sr = me->s1->sections[si->sec_num]->reloc; sr; )
{
for (rel = (Elf32_Rel *) sr->data, rel_end = (Elf32_Rel *) (sr->data + sr->data_offset); rel < rel_end; rel++)
{
int type = ELF32_R_TYPE(rel->r_info);
if (type != R_386_PC32 && type != R_386_32)
continue;
int sym = ELF32_R_SYM(rel->r_info);
if (sym > symtab_section->data_offset / sizeof(Elf32_Sym))
continue;
Elf32_Sym* esym = ((Elf32_Sym*)symtab_section->data) + sym;
int sect = esym->st_shndx;
ss = findsection(me, sect);
const char *sym_name = strtab_section->data + esym->st_name;
if (ss == 0)
{
fprintf(fdbg, "undefined symbol '%s'\n", sym_name);
continue;
}
if (rel->r_offset > si->data_size) continue;
fprintf(fdbg, "\t0x%X %s\n", ss->sh_addr + esym->st_value, sym_name);
}
}
}
*/
close_source_file();
fclose(fdbg);
return 0;
}
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