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merlin-utils
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fixes so omf version 1 support works

This commit is contained in:
Kelvin Sherlock 2022-12-08 18:37:36 -05:00
parent 9ccab300f2
commit 471c4d4151
2 changed files with 21 additions and 6 deletions
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18
link.cpp
View File

@ -798,7 +798,7 @@ void finish(void) {
if (lkv == 0)
save_bin(path, segments.back());
else
save_omf(path, segments, compress, express);
save_omf(path, segments, compress, express, ver);
set_file_type(path, ftype, atype);
} catch (std::exception &ex) {
@ -903,7 +903,11 @@ void finish3(void) {
push(buffer, omf::opcode::GEQU);
push(buffer, sym.name);
push(buffer, static_cast<uint16_t>(0x00)); /* length attr */
if (ver == 1) {
push(buffer, static_cast<uint8_t>(0x00)); /* length attr */
} else {
push(buffer, static_cast<uint16_t>(0x00)); /* length attr */
}
push(buffer, static_cast<uint8_t>('G')); /* type attr */
push(buffer, static_cast<uint32_t>(sym.value));
} else {
@ -969,7 +973,11 @@ void finish3(void) {
/* add global record */
push(buffer, omf::opcode::GLOBAL);
push(buffer, iter1->second); /* name */
push(buffer, static_cast<uint16_t>(0x00)); /* length attr */
if (ver == 1) {
push(buffer, static_cast<uint8_t>(0x00)); /* length attr */
} else {
push(buffer, static_cast<uint16_t>(0x00)); /* length attr */
}
push(buffer, static_cast<uint8_t>('N')); /* type attr */
push(buffer, static_cast<uint8_t>(0x00)); /* public */
++iter1;
@ -1006,7 +1014,7 @@ void finish3(void) {
if (iter3 != resolved.end())
throw std::runtime_error("relocation offset error");
void save_object(const std::string &path, omf::segment &s, uint32_t length);
void save_object(const std::string &path, omf::segment &s, uint32_t length, unsigned version);
std::string path = save_file;
@ -1014,7 +1022,7 @@ void finish3(void) {
if (verbose) printf("Saving %s\n", path.c_str());
try {
save_object(path, seg, pc);
save_object(path, seg, pc, ver);
set_file_type(path, 0xb1, 0x0000);
} catch (std::exception &ex) {
errx(EX_OSERR, "%s: %s", path.c_str(), ex.what());

9
omf.cpp
View File

@ -490,7 +490,7 @@ void save_bin(const std::string &path, omf::segment &segment) {
close(fd);
}
void save_object(const std::string &path, omf::segment &s, uint32_t length) {
void save_object(const std::string &path, omf::segment &s, uint32_t length, unsigned version) {
/* data is already in OMF format. */
@ -521,6 +521,7 @@ void save_object(const std::string &path, omf::segment &s, uint32_t length) {
h.bytecount = sizeof(omf_header) + data.size() + s.data.size();
unsigned offset = 0;
if (version == 1) to_v1(h);
to_little(h);
offset += write(fd, &h, sizeof(h));
offset += write(fd, data.data(), data.size());
@ -669,6 +670,12 @@ void save_omf(const std::string &path, std::vector<omf::segment> &segments, bool
to_little(h);
offset += write(fd, &h, sizeof(h));
offset += write(fd, data.data(), data.size());
// version 1 needs 512-byte padding for all but final segment.
if (version == 1 && &s != &segments.back()) {
static uint8_t zero[512];
offset += write(fd, zero, 512 - (offset & 511) );
}
}
if (expressload) {