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https://github.com/ksherlock/wdc-utils.git
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generate super records…
This commit is contained in:
Kelvin Sherlock
parent
6d1e684f8d
commit
25e6e61989
230
omf.cpp
230
omf.cpp
@ -3,6 +3,7 @@
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#include <vector>
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#include <string>
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#include <algorithm>
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#include <array>
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#include <unistd.h>
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#include <fcntl.h>
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@ -10,6 +11,8 @@
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#include <sysexits.h>
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#include <assert.h>
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#include "optional.h"
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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@ -91,9 +94,14 @@ class super_reloc {
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std::vector<uint8_t> _data;
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uint32_t _page = 0;
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int _count = 0;
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bool _valid = false;
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public:
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super_reloc(unsigned type) {
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_data.push_back(0xf7);
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_valid = true;
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_data.push_back(omf::SUPER);
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_data.push_back(0x00);
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_data.push_back(0x00);
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_data.push_back(0x00);
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@ -101,6 +109,8 @@ class super_reloc {
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_data.push_back(type);
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}
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void append(uint32_t pc) {
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unsigned offset = pc & 0xff;
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unsigned page = pc >> 8;
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@ -111,42 +121,222 @@ class super_reloc {
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if (skip > 1) _data.push_back(0x80 | skip);
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_page = page;
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_count = 0;
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_data.push_back(0); // count-1 place holder.
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}
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_data[_data.size() - _count - 1] = _count; // count is count - 1 at this point,
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if (!_count) {
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_valid = true;
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_data.push_back(0); // count-1 place holder.
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} else {
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_data[_data.size() - _count - 1] = _count; // count is count - 1 at this point,
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}
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_data.push_back(offset);
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++_count;
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}
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std::vector<uint8_t> &&finish() {
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uint32_t size = _data.size() - 5;
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_data[1] = size & 0xff; size >>= 8;
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_data[2] = size & 0xff; size >>= 8;
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_data[3] = size & 0xff; size >>= 8;
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_data[4] = size & 0xff; size >>= 8;
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return std::move(_data);
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std::vector<uint8_t> finish() {
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if (_valid) {
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uint32_t size = _data.size() - 5;
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_data[1] = size & 0xff; size >>= 8;
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_data[2] = size & 0xff; size >>= 8;
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_data[3] = size & 0xff; size >>= 8;
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_data[4] = size & 0xff; size >>= 8;
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}
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auto tmp = std::move(_data);
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_valid = false;
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_data.clear();
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return tmp;
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}
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};
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#if 0
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compress() {
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enum {
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SUPER_RELOC2,
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SUPER_RELOC3,
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SUPER_INTERSEG1,
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SUPER_INTERSEG2,
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SUPER_INTERSEG3,
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SUPER_INTERSEG4,
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SUPER_INTERSEG5,
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SUPER_INTERSEG6,
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SUPER_INTERSEG7,
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SUPER_INTERSEG8,
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SUPER_INTERSEG9,
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SUPER_INTERSEG10,
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SUPER_INTERSEG11,
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SUPER_INTERSEG12,
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SUPER_INTERSEG13,
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SUPER_INTERSEG14,
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SUPER_INTERSEG15,
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SUPER_INTERSEG16,
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SUPER_INTERSEG17,
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SUPER_INTERSEG18,
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SUPER_INTERSEG19,
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SUPER_INTERSEG20,
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SUPER_INTERSEG21,
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SUPER_INTERSEG22,
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SUPER_INTERSEG23,
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SUPER_INTERSEG24,
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SUPER_INTERSEG25,
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SUPER_INTERSEG26,
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SUPER_INTERSEG27,
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SUPER_INTERSEG28,
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SUPER_INTERSEG29,
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SUPER_INTERSEG30,
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SUPER_INTERSEG31,
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SUPER_INTERSEG32,
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SUPER_INTERSEG33,
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SUPER_INTERSEG34,
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SUPER_INTERSEG35,
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SUPER_INTERSEG36,
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};
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uint32_t add_relocs(std::vector<uint8_t> &data, size_t data_offset, omf::segment &seg, bool compress) {
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std::array< optional<super_reloc>, 38 > ss;
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for(auto &r : s.reloc) {
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// super reloc 2 -- size = 2, shift = 0
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// super reloc 2 -- size = 3, shift = 0
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uint32_t reloc_size = 0;
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if (r.size == 2 && r.shift == 0) {
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for (auto &r : seg.relocs) {
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if (r.can_compress()) {
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if (compress && r.shift == 0 && r.size == 2) {
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constexpr int n = SUPER_RELOC2;
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auto &sr = ss[n];
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if (!sr) sr.emplace(n);
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uint32_t value = r.value;
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sr->append(r.offset);
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for (int i = 0; i < 2; ++i, value >>= 8)
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data[data_offset + r.offset + i] = value;
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continue;
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}
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// sreloc 3 is for 3 bytes. however 4 bytes is also ok since
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// it's 24-bit address space.
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if (compress && r.shift == 0 && (r.size == 2 || r.size == 3))
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{
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constexpr int n = SUPER_RELOC3;
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auto &sr = ss[n];
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if (!sr) sr.emplace(n);
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uint32_t value = r.value;
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sr->append(r.offset);
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for (int i = 0; i < 3; ++i, value >>= 8)
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data[data_offset + r.offset + i] = value;
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continue;
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}
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// if size == 2 && shift == -16, -> SUPER INTERSEG
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if (compress && seg.segnum <= 12 && r.shift == 0xf0 && r.size == 2) {
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int n = SUPER_INTERSEG24 + seg.segnum;
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auto &sr = ss[n];
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if (!sr) sr.emplace(n);
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uint32_t value = r.value;
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sr->append(r.offset);
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for (int i = 0; i < 2; ++i, value >>= 8)
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data[data_offset + r.offset + i] = value;
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continue;
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}
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push(data, (uint8_t)omf::cRELOC);
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push(data, (uint8_t)r.size);
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push(data, (uint8_t)r.shift);
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push(data, (uint16_t)r.offset);
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push(data, (uint16_t)r.value);
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reloc_size += 7;
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} else {
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push(data, (uint8_t)omf::RELOC);
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push(data, (uint8_t)r.size);
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push(data, (uint8_t)r.shift);
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push(data, (uint32_t)r.offset);
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push(data, (uint32_t)r.value);
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reloc_size += 11;
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}
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}
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for (const auto &r : seg.intersegs) {
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if (r.can_compress()) {
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if (compress) {
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if (r.shift == 0 && r.size == 3) {
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constexpr int n = SUPER_INTERSEG1;
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auto &sr = ss[n];
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if (!sr) sr.emplace(n);
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uint32_t value = r.segment_offset;
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data[data_offset + r.offset + 0] = value; value >>= 8;
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data[data_offset + r.offset + 1] = value; value >>= 8;
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data[data_offset + r.offset + 2] = r.segment;
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continue;
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}
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if (r.shift == 0 && r.size == 2 && r.segment <= 12) {
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int n = SUPER_INTERSEG12 + r.segment;
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auto &sr = ss[n];
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if (!sr) sr.emplace(n);
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uint32_t value = r.segment_offset;
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sr->append(r.offset);
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for (int i = 0; i < 2; ++i, value >>= 8)
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data[data_offset + r.offset + i] = value;
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continue;
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}
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if (r.shift == 0xf0 && r.size == 2 && r.segment <= 12) {
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int n = SUPER_INTERSEG24 + r.segment;
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auto &sr = ss[n];
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if (!sr) sr.emplace(n);
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uint32_t value = r.segment_offset;
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sr->append(r.offset);
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for (int i = 0; i < 2; ++i, value >>= 8)
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data[data_offset + r.offset + i] = value;
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continue;
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}
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}
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push(data, (uint8_t)omf::cINTERSEG);
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push(data, (uint8_t)r.size);
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push(data, (uint8_t)r.shift);
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push(data, (uint16_t)r.offset);
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push(data, (uint8_t)r.segment);
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push(data, (uint16_t)r.segment_offset);
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reloc_size += 8;
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} else {
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push(data, (uint8_t)omf::INTERSEG);
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push(data, (uint8_t)r.size);
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push(data, (uint8_t)r.shift);
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push(data, (uint32_t)r.offset);
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push(data, (uint16_t)r.file);
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push(data, (uint16_t)r.segment);
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push(data, (uint32_t)r.segment_offset);
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reloc_size += 15;
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}
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}
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for (auto &s : ss) {
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if (!s) continue;
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auto tmp = s->finish();
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reloc_size += tmp.size();
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data.insert(data.end(), tmp.begin(), tmp.end());
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}
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return reloc_size;
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}
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#endif
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void save_omf(std::vector<omf::segment> &segments, bool expressload, const std::string &path) {
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@ -208,7 +398,7 @@ void save_omf(std::vector<omf::segment> &segments, bool expressload, const std::
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uint32_t lconst_size = h.length;
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//lconst record
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push(data, (uint8_t)0xf2);
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push(data, (uint8_t)omf::LCONST);
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push(data, (uint32_t)h.length);
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data.insert(data.end(), s.data.begin(), s.data.end());
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