2019-12-08 18:55:33 +00:00
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/* c++17 */
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2019-12-11 02:39:51 +00:00
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#include <algorithm>
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#include <charconv>
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2019-12-08 18:55:33 +00:00
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#include <string>
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2019-12-09 18:02:15 +00:00
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#include <string_view>
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#include <system_error>
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2019-12-11 02:39:51 +00:00
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#include <unordered_map>
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#include <utility>
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#include <vector>
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2019-12-09 18:02:15 +00:00
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#include <cstdint>
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#include <cassert>
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#include <cstdio>
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#include <err.h>
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2019-12-10 00:45:45 +00:00
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#include <sysexits.h>
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#include <unistd.h>
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2019-12-09 18:02:15 +00:00
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#include <afp/finder_info.h>
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2019-12-08 18:55:33 +00:00
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2019-12-10 00:45:45 +00:00
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#include "mapped_file.h"
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2019-12-08 18:55:33 +00:00
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#include "omf.h"
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2019-12-09 18:02:15 +00:00
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#include "rel.h"
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2019-12-08 18:55:33 +00:00
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void save_omf(const std::string &path, std::vector<omf::segment> &segments, bool compress, bool expressload);
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2019-12-10 00:45:45 +00:00
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int set_file_type(const std::string &path, uint16_t file_type, uint32_t aux_type, std::error_code &ec);
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void set_file_type(const std::string &path, uint16_t file_type, uint32_t aux_type);
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2019-12-08 18:55:33 +00:00
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2019-12-09 18:02:15 +00:00
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/* since span isn't standard yet */
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typedef std::basic_string_view<uint8_t> byte_view;
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2019-12-08 18:55:33 +00:00
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struct symbol {
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std::string name;
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std::string file;
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uint32_t value = 0;
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unsigned id = 0;
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unsigned count = 0;
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bool absolute = false;
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bool defined = false;
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};
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2019-12-10 00:45:45 +00:00
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std::unordered_map<std::string, unsigned> symbol_map;
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std::vector<symbol> symbol_table;
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2019-12-08 18:55:33 +00:00
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struct pending_reloc : public omf::reloc {
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unsigned id = 0;
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};
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2019-12-10 00:45:45 +00:00
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std::vector<pending_reloc> relocations;
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2019-12-08 18:55:33 +00:00
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2019-12-09 18:02:15 +00:00
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std::vector<omf::segment> segments;
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/* nb - pointer may be invalidated by next call */
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symbol *find_symbol(const std::string &name) {
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2019-12-08 18:55:33 +00:00
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auto iter = symbol_map.find(name);
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2019-12-11 02:39:51 +00:00
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if (iter != symbol_map.end()) return &symbol_table[iter->second];
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2019-12-08 18:55:33 +00:00
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2019-12-11 02:39:51 +00:00
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unsigned id = symbol_table.size();
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2019-12-08 18:55:33 +00:00
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symbol_map.emplace(name, id);
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auto &rv = symbol_table.emplace_back();
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rv.name = name;
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rv.id = id;
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2019-12-09 18:02:15 +00:00
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return &rv;
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2019-12-08 18:55:33 +00:00
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}
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2019-12-09 18:02:15 +00:00
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struct cookie {
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std::string file;
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std::vector<unsigned> remap;
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2019-12-10 02:58:01 +00:00
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//std::vector<std::pair<unsigned, unsigned>> zero;
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2019-12-10 03:15:55 +00:00
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uint32_t begin = 0;
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uint32_t end = 0;
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2019-12-09 18:02:15 +00:00
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};
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2019-12-08 18:55:33 +00:00
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2019-12-09 18:02:15 +00:00
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void process_labels(byte_view &data, cookie &cookie) {
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2019-12-08 18:55:33 +00:00
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for(;;) {
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2019-12-09 18:02:15 +00:00
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assert(data.size());
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2019-12-08 18:55:33 +00:00
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unsigned flag = data[0];
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if (flag == 0x00) return;
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unsigned length = flag & 0x1f;
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assert(length != 0);
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assert(data.size() >= length + 4);
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std::string name(data.data() + 1, data.data() + 1 + length);
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data.remove_prefix(1 + length);
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uint32_t value = data[0] | (data[1] << 8) | (data[2] << 16);
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data.remove_prefix(3);
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2019-12-09 18:02:15 +00:00
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symbol *e = find_symbol(name);
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2019-12-08 18:55:33 +00:00
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switch (flag & ~0x1f) {
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case SYMBOL_EXTERNAL:
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/* map the unit symbol # to a global symbol # */
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value &= 0x7fff;
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2019-12-09 18:02:15 +00:00
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if (cookie.remap.size() < value + 1)
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cookie.remap.resize(value + 1);
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cookie.remap[value] = e->id;
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2019-12-08 18:55:33 +00:00
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break;
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case SYMBOL_ENTRY+SYMBOL_ABSOLUTE:
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if (e->defined && e->absolute && e->value == value)
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break; /* allow redef */
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case SYMBOL_ENTRY:
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if (e->defined) {
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2019-12-09 18:02:15 +00:00
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warnx("%s previously defined (%s)", e->name.c_str(), e->file.c_str());
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2019-12-08 18:55:33 +00:00
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break;
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}
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e->defined = true;
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2019-12-09 18:02:15 +00:00
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e->file = cookie.file;
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2019-12-08 18:55:33 +00:00
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if (flag & SYMBOL_ABSOLUTE) {
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e->absolute = true;
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e->value = value;
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} else {
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e->absolute = false;
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2019-12-10 03:15:55 +00:00
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e->value = value - 0x8000 + cookie.begin;
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2019-12-08 18:55:33 +00:00
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}
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break;
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default:
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2019-12-09 18:02:15 +00:00
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errx(1, "%s: Unsupported flag: %02x\n", cookie.file.c_str(), flag);
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break;
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2019-12-08 18:55:33 +00:00
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}
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}
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}
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2019-12-09 18:02:15 +00:00
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void process_reloc(byte_view &data, cookie &cookie) {
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2019-12-10 00:45:45 +00:00
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auto &seg = segments.back();
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2019-12-08 18:55:33 +00:00
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for(;;) {
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assert(data.size());
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unsigned flag = data[0];
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if (flag == 0x00) return;
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assert(data.size() >= 4);
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uint32_t offset = data[1] | (data[2] << 8);
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unsigned x = data[3];
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data.remove_prefix(4);
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2019-12-10 03:15:55 +00:00
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offset += cookie.begin;
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2019-12-08 18:55:33 +00:00
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bool external = false;
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unsigned shift = 0;
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uint32_t value = 0;
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unsigned size = 0;
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if (flag == 0xff) {
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/* shift */
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assert(data.size() >= 4);
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unsigned flag = data[0];
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value = data[1] | (data[2] << 8) | (data[3] << 16);
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value -= 0x8000;
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external = flag & 0x04;
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switch(flag & ~0x04) {
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case 0xd0:
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2019-12-10 02:58:01 +00:00
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shift = -16;
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2019-12-08 18:55:33 +00:00
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size = 1;
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break;
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case 0xd1:
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2019-12-10 02:58:01 +00:00
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shift = -8;
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2019-12-08 18:55:33 +00:00
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size = 2;
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break;
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case 0xd3:
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2019-12-10 02:58:01 +00:00
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shift = -8;
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2019-12-08 18:55:33 +00:00
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size = 1;
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break;
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default: /* bad */
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2019-12-09 18:02:15 +00:00
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errx(1, "%s: Unsupported flag: %02x\n", cookie.file.c_str(), flag);
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break;
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2019-12-08 18:55:33 +00:00
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}
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2019-12-10 02:58:01 +00:00
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data.remove_prefix(4);
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2019-12-08 18:55:33 +00:00
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} else {
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2019-12-09 18:02:15 +00:00
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assert((flag & ~(0x0f|0x10|0x20|0x80)) == 0);
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2019-12-08 18:55:33 +00:00
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2019-12-10 03:15:55 +00:00
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// offset already adjusted by start so below comparisons are wrong.
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2019-12-08 18:55:33 +00:00
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switch(flag & (0x80 + 0x20)) {
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2019-12-09 18:02:15 +00:00
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case 0:
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size = 1;
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2019-12-10 03:15:55 +00:00
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assert(offset + 0 < cookie.end);
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2019-12-09 18:02:15 +00:00
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break;
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case 0x20:
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size = 3;
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2019-12-10 03:15:55 +00:00
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assert(offset + 2 < cookie.end);
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2019-12-09 18:02:15 +00:00
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break;
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case 0x80:
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size = 2;
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2019-12-10 03:15:55 +00:00
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assert(offset + 1 < cookie.end);
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2019-12-09 18:02:15 +00:00
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break;
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2019-12-08 18:55:33 +00:00
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default: /* bad size */
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2019-12-09 18:02:15 +00:00
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errx(1, "%s: Unsupported flag: %02x\n", cookie.file.c_str(), flag);
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break;
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2019-12-08 18:55:33 +00:00
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}
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external = flag & 0x10;
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switch(size) {
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2019-12-10 00:45:45 +00:00
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case 3: value |= seg.data[offset+2] << 16;
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case 2: value |= seg.data[offset+1] << 8;
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case 1: value |= seg.data[offset+0];
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2019-12-08 18:55:33 +00:00
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}
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if (size > 1) value -= 0x8000;
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2019-12-10 03:15:55 +00:00
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value += cookie.begin;
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2019-12-08 18:55:33 +00:00
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}
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/* external resolutions are deferred for later */
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if (external) {
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/* x = local symbol # */
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2019-12-09 18:02:15 +00:00
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pending_reloc r;
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assert(x < cookie.remap.size());
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2019-12-11 02:39:51 +00:00
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r.id = cookie.remap[x];
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2019-12-08 18:55:33 +00:00
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r.size = size;
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r.offset = offset;
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r.value = value;
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r.shift = shift;
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2019-12-10 00:45:45 +00:00
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symbol_table[r.id].count += 1;
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2019-12-08 18:55:33 +00:00
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relocations.emplace_back(r);
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} else {
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omf::reloc r;
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r.size = size;
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2019-12-10 03:15:55 +00:00
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r.offset = offset;
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2019-12-08 18:55:33 +00:00
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r.value = value;
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r.shift = shift;
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seg.relocs.emplace_back(r);
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}
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2019-12-10 02:58:01 +00:00
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/* clear out the inline relocation data */
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for(unsigned i = 0; i < size; ++i) {
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seg.data[offset + i] = 0;
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}
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//cookie.zero.emplace_back(std::make_pair(offset, size));
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2019-12-08 18:55:33 +00:00
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}
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}
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2019-12-09 18:02:15 +00:00
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/*
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2019-12-08 18:55:33 +00:00
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void add_libraries() {
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auto iter = libs.begin();
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auto end = libs.end();
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for(;;) {
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}
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}
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2019-12-09 18:02:15 +00:00
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*/
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2019-12-08 18:55:33 +00:00
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2019-12-09 18:02:15 +00:00
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void process_unit(const std::string &path) {
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2019-12-08 18:55:33 +00:00
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2019-12-09 18:02:15 +00:00
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cookie cookie;
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2019-12-08 18:55:33 +00:00
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/* skip over relocs, do symbols first */
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2019-12-09 18:02:15 +00:00
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std::error_code ec;
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mapped_file mf(path, mapped_file::readonly, ec);
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if (ec) {
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2019-12-10 00:45:45 +00:00
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errx(1, "Unable to open %s: %s", path.c_str(), ec.message().c_str());
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2019-12-09 18:02:15 +00:00
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}
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afp::finder_info fi;
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fi.read(path, ec);
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if (ec) {
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errx(1, "Error reading filetype %s: %s", path.c_str(), ec.message().c_str());
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}
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if (fi.prodos_file_type() != 0xf8) {
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errx(1, "Wrong file type: %s", path.c_str());
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}
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uint32_t offset = fi.prodos_aux_type();
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if (offset+2 > mf.size()) {
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errx(1, "Invalid aux type %s", path.c_str());
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}
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omf::segment &seg = segments.back();
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2019-12-10 03:15:55 +00:00
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cookie.begin = seg.data.size();
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cookie.end = cookie.begin + offset;
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2019-12-09 18:02:15 +00:00
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cookie.file = path;
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2019-12-10 02:58:01 +00:00
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seg.data.insert(seg.data.end(), mf.data(), mf.data() + offset);
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byte_view data(mf.data() + offset, mf.size() - offset);
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2019-12-09 18:02:15 +00:00
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byte_view rr = data;
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/* skip over the relocation records so we can process the labels first. */
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/* this is so external references can use the global symbol id */
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2019-12-10 02:58:01 +00:00
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assert(data.size() >= 2);
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2019-12-08 18:55:33 +00:00
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for(;;) {
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if (data[0] == 0) break;
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2019-12-10 02:58:01 +00:00
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assert(data.size() >= 6);
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2019-12-08 18:55:33 +00:00
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data.remove_prefix(4);
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}
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data.remove_prefix(1);
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2019-12-09 18:02:15 +00:00
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process_labels(data, cookie);
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assert(data.size() == 1);
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2019-12-08 18:55:33 +00:00
|
|
|
|
|
|
|
/* now relocations */
|
2019-12-09 18:02:15 +00:00
|
|
|
process_reloc(rr, cookie);
|
2019-12-08 18:55:33 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2019-12-09 18:02:15 +00:00
|
|
|
void finalize(void) {
|
2019-12-08 18:55:33 +00:00
|
|
|
|
2019-12-10 00:45:45 +00:00
|
|
|
/* this needs to be updated if supporting multiple segments */
|
|
|
|
auto &seg = segments.back();
|
2019-12-08 18:55:33 +00:00
|
|
|
|
2019-12-10 00:45:45 +00:00
|
|
|
for (auto &r : relocations) {
|
2019-12-11 02:39:51 +00:00
|
|
|
assert(r.id < symbol_map.size());
|
|
|
|
const auto &e = symbol_table[r.id];
|
|
|
|
|
|
|
|
/* if this is an absolute value, do the math */
|
|
|
|
if (!e.defined) {
|
|
|
|
warnx("%s is not defined", e.name.c_str());
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (e.absolute) {
|
|
|
|
uint32_t value = e.value + r.value;
|
|
|
|
value >>= -r.shift;
|
|
|
|
|
|
|
|
unsigned offset = r.offset;
|
|
|
|
unsigned size = r.size;
|
|
|
|
while (size--) {
|
|
|
|
seg.data[offset++] = value & 0xff;
|
|
|
|
value >>= 8;
|
|
|
|
}
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
r.value += e.value;
|
2019-12-08 18:55:33 +00:00
|
|
|
seg.relocs.emplace_back(r);
|
|
|
|
}
|
|
|
|
relocations.clear();
|
|
|
|
}
|
|
|
|
|
2019-12-11 02:39:51 +00:00
|
|
|
void print_symbols(void) {
|
2019-12-08 18:55:33 +00:00
|
|
|
|
|
|
|
if (symbol_table.empty()) return;
|
|
|
|
|
|
|
|
/* alpha */
|
|
|
|
std::sort(symbol_table.begin(), symbol_table.end(),
|
|
|
|
[](const symbol &a, const symbol &b){
|
|
|
|
return a.name < b.name;
|
|
|
|
});
|
|
|
|
|
|
|
|
for (const auto &lab : symbol_table) {
|
|
|
|
fprintf(stdout, "%-20s: $%06x\n", lab.name.c_str(), lab.value);
|
|
|
|
}
|
|
|
|
fputs("\n", stdout);
|
|
|
|
/* numeric */
|
|
|
|
std::sort(symbol_table.begin(), symbol_table.end(),
|
|
|
|
[](const symbol &a, const symbol &b){
|
|
|
|
return a.value < b.value;
|
|
|
|
});
|
|
|
|
|
|
|
|
for (const auto &lab : symbol_table) {
|
|
|
|
fprintf(stdout, "%-20s: $%06x\n", lab.name.c_str(), lab.value);
|
|
|
|
}
|
2019-12-10 00:45:45 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2019-12-11 02:39:51 +00:00
|
|
|
|
2019-12-10 00:45:45 +00:00
|
|
|
void usage(int ex) {
|
|
|
|
|
|
|
|
fputs("merlin-link [-o outfile] infile...\n", stderr);
|
|
|
|
exit(ex);
|
|
|
|
}
|
|
|
|
|
2019-12-11 02:39:51 +00:00
|
|
|
static void add_define(std::string str) {
|
|
|
|
/* -D key[=value]
|
|
|
|
value = 0x, $, % or base 10 */
|
|
|
|
|
|
|
|
uint32_t value = 0;
|
|
|
|
|
|
|
|
auto ix = str.find('=');
|
|
|
|
if (ix == 0) usage(EX_USAGE);
|
|
|
|
if (ix == str.npos) {
|
|
|
|
value = 1;
|
|
|
|
} else {
|
|
|
|
|
|
|
|
int base = 10;
|
|
|
|
auto pos = ++ix;
|
|
|
|
|
|
|
|
char c = str[pos]; /* returns 0 if == size */
|
|
|
|
|
|
|
|
switch(c) {
|
|
|
|
case '%':
|
|
|
|
base = 2; ++pos; break;
|
|
|
|
case '$':
|
|
|
|
base = 16; ++pos; break;
|
|
|
|
case '0':
|
|
|
|
c = str[pos+1];
|
|
|
|
if (c == 'x' || c == 'X') {
|
|
|
|
base = 16; pos += 2;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
auto end = str.data() + str.length();
|
|
|
|
auto r = std::from_chars(str.data() + pos, end, value, base);
|
|
|
|
if (r.ec != std::errc() || r.ptr != end)
|
|
|
|
usage(EX_USAGE);
|
|
|
|
|
|
|
|
str.resize(ix-1);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
symbol *e = find_symbol(str);
|
|
|
|
if (e->defined && e->absolute && e->value == value) return;
|
|
|
|
|
|
|
|
if (e->defined) {
|
|
|
|
warnx("%s previously defined", str.c_str());
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
e->defined = true;
|
|
|
|
e->absolute = true;
|
|
|
|
e->file = "-D";
|
|
|
|
e->value = value;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2019-12-10 00:45:45 +00:00
|
|
|
int main(int argc, char **argv) {
|
|
|
|
|
|
|
|
int c;
|
|
|
|
std::string gs_out = "gs.out";
|
2019-12-10 03:15:55 +00:00
|
|
|
bool express = true;
|
|
|
|
bool compress = true;
|
|
|
|
|
2019-12-10 00:45:45 +00:00
|
|
|
|
2019-12-11 02:39:51 +00:00
|
|
|
while ((c = getopt(argc, argv, "o:D:XC")) != -1) {
|
2019-12-10 00:45:45 +00:00
|
|
|
switch(c) {
|
|
|
|
case 'o':
|
|
|
|
gs_out = optarg;
|
|
|
|
break;
|
2019-12-10 03:15:55 +00:00
|
|
|
case 'X': express = false; break;
|
|
|
|
case 'C': compress = false; break;
|
2019-12-11 02:39:51 +00:00
|
|
|
case 'D': add_define(optarg); break;
|
2019-12-10 00:45:45 +00:00
|
|
|
case ':':
|
|
|
|
case '?':
|
|
|
|
default:
|
|
|
|
usage(EX_USAGE);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
argv += optind;
|
|
|
|
argc -= optind;
|
|
|
|
|
|
|
|
if (!argc) usage(EX_USAGE);
|
|
|
|
|
|
|
|
segments.emplace_back();
|
|
|
|
for (int i = 0; i < argc; ++i) {
|
|
|
|
char *path = argv[i];
|
|
|
|
try {
|
|
|
|
process_unit(path);
|
|
|
|
} catch (std::exception &ex) {
|
|
|
|
errx(EX_DATAERR, "%s: %s", path, ex.what());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-12-11 02:39:51 +00:00
|
|
|
finalize();
|
2019-12-10 03:15:55 +00:00
|
|
|
print_symbols();
|
|
|
|
|
2019-12-10 00:45:45 +00:00
|
|
|
try {
|
2019-12-10 03:15:55 +00:00
|
|
|
save_omf(gs_out, segments, compress, express);
|
2019-12-10 00:45:45 +00:00
|
|
|
set_file_type(gs_out, 0xb3, 0x0000);
|
|
|
|
exit(0);
|
|
|
|
} catch (std::exception &ex) {
|
|
|
|
errx(EX_OSERR, "%s: %s", gs_out.c_str(), ex.what());
|
|
|
|
}
|
2019-12-10 18:24:56 +00:00
|
|
|
}
|