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tccpe: fill checksum header field

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This commit is contained in:
grischka 2009-07-23 19:19:23 +02:00
parent 569c20f104
commit 834b782a9c
1 changed files with 58 additions and 27 deletions
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85
tccpe.c
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@ -417,13 +417,6 @@ ST_FN DWORD umax(DWORD a, DWORD b)
return a < b ? b : a;
}
ST_FN void pe_fpad(FILE *fp, DWORD new_pos)
{
DWORD pos = ftell(fp);
while (++pos <= new_pos)
fputc(0, fp);
}
ST_FN DWORD pe_file_align(DWORD n)
{
return (n + (0x200 - 1)) & ~(0x200 - 1);
@ -447,6 +440,28 @@ ST_FN void pe_set_datadir(struct pe_header *hdr, int dir, DWORD addr, DWORD size
hdr->opthdr.DataDirectory[dir].Size = size;
}
ST_FN int pe_fwrite(void *data, unsigned len, FILE *fp, DWORD *psum)
{
if (psum) {
DWORD sum = *psum;
WORD *p = data;
int i;
for (i = len; i > 0; i -= 2) {
sum += (i >= 2) ? *p++ : *(BYTE*)p;
sum = (sum + (sum >> 16)) & 0xFFFF;
}
*psum = sum;
}
return len == fwrite(data, 1, len, fp) ? 0 : -1;
}
ST_FN void pe_fpad(FILE *fp, DWORD new_pos)
{
DWORD pos = ftell(fp);
while (++pos <= new_pos)
fputc(0, fp);
}
/*----------------------------------------------------------------------------*/
ST_FN int pe_write(struct pe_info *pe)
{
@ -549,15 +564,18 @@ ST_FN int pe_write(struct pe_info *pe)
{0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}}
}};
struct pe_header pe_header = pe_template;
int i;
FILE *op;
DWORD file_offset, r;
struct pe_header pe_header = pe_template;
DWORD file_offset, sum;
struct section_info *si;
IMAGE_SECTION_HEADER *psh;
op = fopen(pe->filename, "wb");
if (NULL == op) {
error_noabort("could not write '%s': %s", pe->filename, strerror(errno));
return 1;
return -1;
}
pe->sizeofheaders = pe_file_align(
@ -566,18 +584,19 @@ ST_FN int pe_write(struct pe_info *pe)
);
file_offset = pe->sizeofheaders;
pe_fpad(op, file_offset);
if (2 == pe->s1->verbose)
printf("-------------------------------"
"\n virt file size section" "\n");
for (i = 0; i < pe->sec_count; ++i) {
struct section_info *si = pe->sec_info + i;
const char *sh_name = si->name;
unsigned long addr = si->sh_addr - pe->imagebase;
unsigned long size = si->sh_size;
IMAGE_SECTION_HEADER *psh = &si->ish;
unsigned long addr, size;
const char *sh_name;
si = pe->sec_info + i;
sh_name = si->name;
addr = si->sh_addr - pe->imagebase;
size = si->sh_size;
psh = &si->ish;
if (2 == pe->s1->verbose)
printf("%6lx %6lx %6lx %s\n",
@ -632,15 +651,13 @@ ST_FN int pe_write(struct pe_info *pe)
umax(pe_virtual_align(size + addr), pe_header.opthdr.SizeOfImage);
if (si->data_size) {
psh->PointerToRawData = r = file_offset;
fwrite(si->data, 1, si->data_size, op);
psh->PointerToRawData = file_offset;
file_offset = pe_file_align(file_offset + si->data_size);
psh->SizeOfRawData = file_offset - r;
pe_fpad(op, file_offset);
psh->SizeOfRawData = file_offset - psh->PointerToRawData;
}
}
// pe_header.filehdr.TimeDateStamp = time(NULL);
//pe_header.filehdr.TimeDateStamp = time(NULL);
pe_header.filehdr.NumberOfSections = pe->sec_count;
pe_header.opthdr.SizeOfHeaders = pe->sizeofheaders;
pe_header.opthdr.ImageBase = pe->imagebase;
@ -649,10 +666,24 @@ ST_FN int pe_write(struct pe_info *pe)
else if (PE_GUI != pe->type)
pe_header.opthdr.Subsystem = 3;
fseek(op, SEEK_SET, 0);
fwrite(&pe_header, 1, sizeof pe_header, op);
sum = 0;
pe_fwrite(&pe_header, sizeof pe_header, op, &sum);
for (i = 0; i < pe->sec_count; ++i)
fwrite(&pe->sec_info[i].ish, 1, sizeof(IMAGE_SECTION_HEADER), op);
pe_fwrite(&pe->sec_info[i].ish, sizeof(IMAGE_SECTION_HEADER), op, &sum);
pe_fpad(op, pe->sizeofheaders);
for (i = 0; i < pe->sec_count; ++i) {
si = pe->sec_info + i;
psh = &si->ish;
if (si->data_size) {
pe_fwrite(si->data, si->data_size, op, &sum);
file_offset = psh->PointerToRawData + psh->SizeOfRawData;
pe_fpad(op, file_offset);
}
}
pe_header.opthdr.CheckSum = sum + file_offset;
fseek(op, offsetof(struct pe_header, opthdr.CheckSum), SEEK_SET);
pe_fwrite(&pe_header.opthdr.CheckSum, sizeof pe_header.opthdr.CheckSum, op, NULL);
fclose (op);
if (2 == pe->s1->verbose)
@ -1201,7 +1232,7 @@ ST_FN int pe_check_symbols(struct pe_info *pe)
not_found:
error_noabort("undefined symbol '%s'", name);
ret = 1;
ret = -1;
} else if (pe->s1->rdynamic
&& ELFW_ST_BIND(sym->st_info) != STB_LOCAL) {
@ -1628,7 +1659,7 @@ PUB_FN int pe_output_file(TCCState * s1, const char *filename)
}
}
if (s1->nb_errors)
ret = 1;
ret = -1;
else
ret = pe_write(&pe);
tcc_free(pe.sec_info);