mirror of
https://github.com/ksherlock/wdc-utils.git
synced 2024-12-13 10:29:09 +00:00
504 lines
11 KiB
C++
504 lines
11 KiB
C++
#include "omf.h"
|
|
|
|
#include <vector>
|
|
#include <string>
|
|
#include <algorithm>
|
|
#include <array>
|
|
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <err.h>
|
|
#include <sysexits.h>
|
|
#include <assert.h>
|
|
|
|
#include "optional.h"
|
|
|
|
#ifndef O_BINARY
|
|
#define O_BINARY 0
|
|
#endif
|
|
|
|
#pragma pack(push, 1)
|
|
struct omf_header {
|
|
uint32_t bytecount = 0;
|
|
uint32_t reserved_space = 0;
|
|
uint32_t length = 0;
|
|
uint8_t unused1 = 0;
|
|
uint8_t lablen = 0;
|
|
uint8_t numlen = 4;
|
|
uint8_t version = 2;
|
|
uint32_t banksize = 0;
|
|
uint16_t kind = 0;
|
|
uint16_t unused2 = 0;
|
|
uint32_t org = 0;
|
|
uint32_t alignment = 0;
|
|
uint8_t numsex = 0;
|
|
uint8_t unused3 = 0;
|
|
uint16_t segnum = 0;
|
|
uint32_t entry = 0;
|
|
uint16_t dispname = 0;
|
|
uint16_t dispdata = 0;
|
|
};
|
|
|
|
struct omf_express_header {
|
|
uint32_t lconst_mark;
|
|
uint32_t lconst_size;
|
|
uint32_t reloc_mark;
|
|
uint32_t reloc_size;
|
|
uint8_t unused1 = 0;
|
|
uint8_t lablen = 0;
|
|
uint8_t numlen = 4;
|
|
uint8_t version = 2;
|
|
uint32_t banksize = 0;
|
|
uint16_t kind = 0;
|
|
uint16_t unused2 = 0;
|
|
uint32_t org = 0;
|
|
uint32_t alignment = 0;
|
|
uint8_t numsex = 0;
|
|
uint8_t unused3 = 0;
|
|
uint16_t segnum = 0;
|
|
uint32_t entry = 0;
|
|
uint16_t dispname = 0;
|
|
uint16_t dispdata = 0;
|
|
};
|
|
|
|
#pragma pack(pop)
|
|
|
|
void push(std::vector<uint8_t> &v, uint8_t x) {
|
|
v.push_back(x);
|
|
}
|
|
|
|
void push(std::vector<uint8_t> &v, uint16_t x) {
|
|
v.push_back(x & 0xff);
|
|
x >>= 8;
|
|
v.push_back(x & 0xff);
|
|
}
|
|
|
|
void push(std::vector<uint8_t> &v, uint32_t x) {
|
|
v.push_back(x & 0xff);
|
|
x >>= 8;
|
|
v.push_back(x & 0xff);
|
|
x >>= 8;
|
|
v.push_back(x & 0xff);
|
|
x >>= 8;
|
|
v.push_back(x & 0xff);
|
|
}
|
|
|
|
void push(std::vector<uint8_t> &v, const std::string &s) {
|
|
uint8_t count = std::min((int)s.size(), 255);
|
|
push(v, count);
|
|
v.insert(v.end(), s.begin(), s.end());
|
|
}
|
|
|
|
class super_helper {
|
|
|
|
std::vector<uint8_t> _data;
|
|
uint32_t _page = 0;
|
|
int _count = 0;
|
|
|
|
public:
|
|
|
|
super_helper() = default;
|
|
|
|
|
|
void append(uint32_t pc) {
|
|
unsigned offset = pc & 0xff;
|
|
unsigned page = pc >> 8;
|
|
assert(page >= _page);
|
|
|
|
if (page != _page) {
|
|
unsigned skip = page - _page;
|
|
if (skip > 1) {
|
|
|
|
while (skip >= 0x80) {
|
|
_data.push_back(0xff);
|
|
skip -= 0x7f;
|
|
}
|
|
if (skip)
|
|
_data.push_back(0x80 | skip);
|
|
}
|
|
_page = page;
|
|
_count = 0;
|
|
}
|
|
|
|
if (!_count) {
|
|
_data.push_back(0); // count-1 place holder.
|
|
} else {
|
|
_data[_data.size() - _count - 1] = _count; // count is count - 1 at this point,
|
|
}
|
|
|
|
_data.push_back(offset);
|
|
++_count;
|
|
}
|
|
|
|
void reset() {
|
|
_data.clear();
|
|
_page = 0;
|
|
_count = 0;
|
|
}
|
|
|
|
const std::vector<uint8_t> &data() {
|
|
return _data;
|
|
}
|
|
|
|
};
|
|
|
|
|
|
enum {
|
|
SUPER_RELOC2,
|
|
SUPER_RELOC3,
|
|
SUPER_INTERSEG1,
|
|
SUPER_INTERSEG2,
|
|
SUPER_INTERSEG3,
|
|
SUPER_INTERSEG4,
|
|
SUPER_INTERSEG5,
|
|
SUPER_INTERSEG6,
|
|
SUPER_INTERSEG7,
|
|
SUPER_INTERSEG8,
|
|
SUPER_INTERSEG9,
|
|
SUPER_INTERSEG10,
|
|
SUPER_INTERSEG11,
|
|
SUPER_INTERSEG12,
|
|
SUPER_INTERSEG13,
|
|
SUPER_INTERSEG14,
|
|
SUPER_INTERSEG15,
|
|
SUPER_INTERSEG16,
|
|
SUPER_INTERSEG17,
|
|
SUPER_INTERSEG18,
|
|
SUPER_INTERSEG19,
|
|
SUPER_INTERSEG20,
|
|
SUPER_INTERSEG21,
|
|
SUPER_INTERSEG22,
|
|
SUPER_INTERSEG23,
|
|
SUPER_INTERSEG24,
|
|
SUPER_INTERSEG25,
|
|
SUPER_INTERSEG26,
|
|
SUPER_INTERSEG27,
|
|
SUPER_INTERSEG28,
|
|
SUPER_INTERSEG29,
|
|
SUPER_INTERSEG30,
|
|
SUPER_INTERSEG31,
|
|
SUPER_INTERSEG32,
|
|
SUPER_INTERSEG33,
|
|
SUPER_INTERSEG34,
|
|
SUPER_INTERSEG35,
|
|
SUPER_INTERSEG36,
|
|
};
|
|
|
|
uint32_t add_relocs(std::vector<uint8_t> &data, size_t data_offset, omf::segment &seg, bool compress) {
|
|
|
|
std::array< optional<super_helper>, 38 > ss;
|
|
|
|
|
|
uint32_t reloc_size = 0;
|
|
|
|
for (auto &r : seg.relocs) {
|
|
|
|
if (r.can_compress()) {
|
|
|
|
if (compress) {
|
|
if (r.shift == 0 && r.size == 2) {
|
|
constexpr int n = SUPER_RELOC2;
|
|
|
|
auto &sr = ss[n];
|
|
if (!sr) sr.emplace();
|
|
|
|
uint32_t value = r.value;
|
|
sr->append(r.offset);
|
|
for (int i = 0; i < 2; ++i, value >>= 8)
|
|
data[data_offset + r.offset + i] = value;
|
|
continue;
|
|
}
|
|
|
|
// sreloc 3 is for 3 bytes. however 4 bytes is also ok since
|
|
// it's 24-bit address space.
|
|
if (r.shift == 0 && (r.size == 2 || r.size == 3))
|
|
{
|
|
constexpr int n = SUPER_RELOC3;
|
|
|
|
auto &sr = ss[n];
|
|
if (!sr) sr.emplace();
|
|
|
|
uint32_t value = r.value;
|
|
sr->append(r.offset);
|
|
for (int i = 0; i < 3; ++i, value >>= 8)
|
|
data[data_offset + r.offset + i] = value;
|
|
continue;
|
|
}
|
|
|
|
// if size == 2 && shift == -16, -> SUPER INTERSEG
|
|
if (seg.segnum <= 12 && r.shift == 0xf0 && r.size == 2) {
|
|
|
|
int n = SUPER_INTERSEG24 + seg.segnum;
|
|
auto &sr = ss[n];
|
|
if (!sr) sr.emplace();
|
|
|
|
uint32_t value = r.value;
|
|
sr->append(r.offset);
|
|
for (int i = 0; i < 2; ++i, value >>= 8)
|
|
data[data_offset + r.offset + i] = value;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
push(data, (uint8_t)omf::cRELOC);
|
|
push(data, (uint8_t)r.size);
|
|
push(data, (uint8_t)r.shift);
|
|
push(data, (uint16_t)r.offset);
|
|
push(data, (uint16_t)r.value);
|
|
reloc_size += 7;
|
|
} else {
|
|
push(data, (uint8_t)omf::RELOC);
|
|
push(data, (uint8_t)r.size);
|
|
push(data, (uint8_t)r.shift);
|
|
push(data, (uint32_t)r.offset);
|
|
push(data, (uint32_t)r.value);
|
|
reloc_size += 11;
|
|
}
|
|
}
|
|
|
|
for (const auto &r : seg.intersegs) {
|
|
if (r.can_compress()) {
|
|
|
|
if (compress) {
|
|
|
|
if (r.shift == 0 && r.size == 3) {
|
|
constexpr int n = SUPER_INTERSEG1;
|
|
auto &sr = ss[n];
|
|
if (!sr) sr.emplace();
|
|
|
|
uint32_t value = r.segment_offset;
|
|
data[data_offset + r.offset + 0] = value; value >>= 8;
|
|
data[data_offset + r.offset + 1] = value; value >>= 8;
|
|
data[data_offset + r.offset + 2] = r.segment;
|
|
continue;
|
|
}
|
|
|
|
|
|
if (r.shift == 0 && r.size == 2 && r.segment <= 12) {
|
|
|
|
int n = SUPER_INTERSEG12 + r.segment;
|
|
auto &sr = ss[n];
|
|
if (!sr) sr.emplace();
|
|
|
|
uint32_t value = r.segment_offset;
|
|
sr->append(r.offset);
|
|
for (int i = 0; i < 2; ++i, value >>= 8)
|
|
data[data_offset + r.offset + i] = value;
|
|
continue;
|
|
}
|
|
|
|
if (r.shift == 0xf0 && r.size == 2 && r.segment <= 12) {
|
|
|
|
int n = SUPER_INTERSEG24 + r.segment;
|
|
auto &sr = ss[n];
|
|
if (!sr) sr.emplace();
|
|
|
|
uint32_t value = r.segment_offset;
|
|
sr->append(r.offset);
|
|
for (int i = 0; i < 2; ++i, value >>= 8)
|
|
data[data_offset + r.offset + i] = value;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
|
|
push(data, (uint8_t)omf::cINTERSEG);
|
|
push(data, (uint8_t)r.size);
|
|
push(data, (uint8_t)r.shift);
|
|
push(data, (uint16_t)r.offset);
|
|
push(data, (uint8_t)r.segment);
|
|
push(data, (uint16_t)r.segment_offset);
|
|
reloc_size += 8;
|
|
} else {
|
|
push(data, (uint8_t)omf::INTERSEG);
|
|
push(data, (uint8_t)r.size);
|
|
push(data, (uint8_t)r.shift);
|
|
push(data, (uint32_t)r.offset);
|
|
push(data, (uint16_t)r.file);
|
|
push(data, (uint16_t)r.segment);
|
|
push(data, (uint32_t)r.segment_offset);
|
|
reloc_size += 15;
|
|
}
|
|
}
|
|
|
|
|
|
for (int i = 0; i < ss.size(); ++i) {
|
|
auto &s = ss[i];
|
|
if (!s) continue;
|
|
|
|
auto tmp = s->data();
|
|
if (tmp.empty()) continue;
|
|
|
|
reloc_size += tmp.size() + 6;
|
|
data.push_back(omf::SUPER);
|
|
push(data, ((uint32_t)tmp.size() + 1));
|
|
data.push_back(i);
|
|
|
|
data.insert(data.end(), tmp.begin(), tmp.end());
|
|
}
|
|
|
|
return reloc_size;
|
|
}
|
|
|
|
void save_omf(const std::string &path, std::vector<omf::segment> &segments, bool compress, bool expressload) {
|
|
|
|
// expressload doesn't support links to other files.
|
|
// fortunately, we don't either.
|
|
|
|
std::vector<uint8_t> expr_headers;
|
|
std::vector<unsigned> expr_offsets;
|
|
|
|
int fd;
|
|
fd = open(path.c_str(), O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0666);
|
|
if (fd < 0) {
|
|
err(EX_CANTCREAT, "Unable to open %s", path.c_str());
|
|
}
|
|
|
|
|
|
uint32_t offset = 0;
|
|
if (expressload) {
|
|
for (auto &s : segments) {
|
|
s.segnum++;
|
|
for (auto &r : s.intersegs) r.segment++;
|
|
}
|
|
|
|
// calculate express load segment size.
|
|
// sizeof includes the trailing 0, so no need to add in byte size.
|
|
offset = sizeof(omf_header) + 10 + sizeof("~ExpressLoad");
|
|
|
|
offset += 6; // lconst + end
|
|
offset += 6; // header.
|
|
for (auto &s : segments) {
|
|
offset += 8 + 2;
|
|
offset += sizeof(omf_express_header) + 10;
|
|
offset += s.segname.length() + 1;
|
|
}
|
|
|
|
lseek(fd, offset, SEEK_SET);
|
|
}
|
|
|
|
|
|
for (auto &s : segments) {
|
|
omf_header h;
|
|
h.length = s.data.size();
|
|
h.kind = s.kind;
|
|
h.banksize = s.data.size() > 0xffff ? 0x0000 : 0x010000;
|
|
h.segnum = s.segnum;
|
|
|
|
std::vector<uint8_t> data;
|
|
|
|
// push segname and load name onto data.
|
|
data.insert(data.end(), 10, ' ');
|
|
push(data, s.segname);
|
|
|
|
h.dispname = sizeof(omf_header);
|
|
h.dispdata = sizeof(omf_header) + data.size();
|
|
|
|
|
|
|
|
uint32_t lconst_offset = offset + sizeof(omf_header) + data.size() + 5;
|
|
uint32_t lconst_size = h.length;
|
|
|
|
//lconst record
|
|
push(data, (uint8_t)omf::LCONST);
|
|
push(data, (uint32_t)h.length);
|
|
|
|
size_t data_offset = data.size();
|
|
|
|
data.insert(data.end(), s.data.begin(), s.data.end());
|
|
|
|
|
|
uint32_t reloc_offset = offset + sizeof(omf_header) + data.size();
|
|
uint32_t reloc_size = 0;
|
|
|
|
reloc_size = add_relocs(data, data_offset, s, compress);
|
|
|
|
// end-of-record
|
|
push(data, (uint8_t)omf::END);
|
|
|
|
h.bytecount = data.size() + sizeof(omf_header);
|
|
|
|
// todo -- byteswap to little-endian!
|
|
offset += write(fd, &h, sizeof(h));
|
|
offset += write(fd, data.data(), data.size());
|
|
|
|
if (expressload) {
|
|
|
|
expr_offsets.emplace_back(expr_headers.size());
|
|
|
|
if (lconst_size == 0) lconst_offset = 0;
|
|
if (reloc_size == 0) reloc_offset = 0;
|
|
|
|
|
|
push(expr_headers, (uint32_t)lconst_offset);
|
|
push(expr_headers, (uint32_t)lconst_size);
|
|
push(expr_headers, (uint32_t)reloc_offset);
|
|
push(expr_headers, (uint32_t)reloc_size);
|
|
|
|
push(expr_headers, h.unused1);
|
|
push(expr_headers, h.lablen);
|
|
push(expr_headers, h.numlen);
|
|
push(expr_headers, h.version);
|
|
push(expr_headers, h.banksize);
|
|
push(expr_headers, h.kind);
|
|
push(expr_headers, h.unused2);
|
|
push(expr_headers, h.org);
|
|
push(expr_headers, h.alignment);
|
|
push(expr_headers, h.numsex);
|
|
push(expr_headers, h.unused3);
|
|
push(expr_headers, h.segnum);
|
|
push(expr_headers, h.entry);
|
|
push(expr_headers, (uint16_t)(h.dispname-4));
|
|
push(expr_headers, h.dispdata);
|
|
|
|
expr_headers.insert(expr_headers.end(), 10, ' ');
|
|
push(expr_headers, s.segname);
|
|
}
|
|
|
|
}
|
|
|
|
if (expressload) {
|
|
omf_header h;
|
|
h.segnum = 1;
|
|
h.banksize = 0x00010000;
|
|
h.kind = 0x8001;
|
|
h.dispname = 0x2c;
|
|
h.dispdata = 0x43;
|
|
|
|
unsigned fudge = 10 * segments.size();
|
|
|
|
h.length = 6 + expr_headers.size() + fudge;
|
|
|
|
std::vector<uint8_t> data;
|
|
data.insert(data.begin(), 10, ' ');
|
|
push(data, std::string("~ExpressLoad"));
|
|
push(data, (uint8_t)0xf2); // lconst.
|
|
push(data, (uint32_t)h.length);
|
|
|
|
push(data, (uint32_t)0); // reserved
|
|
push(data, (uint16_t)(segments.size() - 1)); // seg count - 1
|
|
|
|
|
|
for (auto &offset : expr_offsets) {
|
|
push(data, (uint16_t)(fudge + offset));
|
|
push(data, (uint16_t)0);
|
|
push(data, (uint32_t)0);
|
|
}
|
|
|
|
for (auto &s : segments) {
|
|
push(data, (uint16_t)s.segnum);
|
|
}
|
|
|
|
data.insert(data.end(), expr_headers.begin(), expr_headers.end());
|
|
push(data, (uint8_t)0); // end.
|
|
|
|
h.bytecount = data.size() + sizeof(omf_header);
|
|
|
|
lseek(fd, 0, SEEK_SET);
|
|
write(fd, &h, sizeof(h));
|
|
write(fd, data.data(), data.size());
|
|
|
|
}
|
|
|
|
close(fd);
|
|
} |