6502/wdc-utils
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bug fixes/enhancements found when testing with merlin

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* super page calculation was off by 1
* (untested) binary file generation
* reserved space support
* alignment support
* loadname support.
This commit is contained in:
Kelvin Sherlock 2019-12-22 16:48:18 -05:00
parent db1d452f53
commit 885fcc7958
2 changed files with 61 additions and 6 deletions
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65
omf.cpp
View File

@ -92,6 +92,12 @@ void push(std::vector<uint8_t> &v, const std::string &s) {
v.insert(v.end(), s.begin(), s.begin() + count);
}
void push(std::vector<uint8_t> &v, const std::string &s, size_t count) {
std::string tmp(s, 0, count);
tmp.resize(count, ' ');
v.insert(v.end(), tmp.begin(), tmp.end());
}
class super_helper {
std::vector<uint8_t> _data;
@ -110,7 +116,8 @@ public:
if (page != _page) {
unsigned skip = page - _page;
if (skip > 1) {
if (_count) --skip;
if (skip) {
while (skip >= 0x80) {
_data.push_back(0xff);
@ -345,6 +352,38 @@ uint32_t add_relocs(std::vector<uint8_t> &data, size_t data_offset, omf::segment
return reloc_size;
}
void save_bin(const std::string &path, omf::segment &segment, uint32_t org) {
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());
}
auto &data = segment.data;
for (auto &r : segment.relocs) {
uint32_t value = r.value + org;
value >>= -(int8_t)r.shift;
unsigned offset = r.offset;
unsigned size = r.size;
while (size--) {
data[offset++] = value & 0xff;
value >>= 8;
}
}
auto ok = write(fd, data.data(), data.size());
if (ok < 0) {
close(fd);
err(EX_OSERR, "write %s", path.c_str());
}
close(fd);
}
void save_omf(const std::string &path, std::vector<omf::segment> &segments, bool compress, bool expressload) {
// expressload doesn't support links to other files.
@ -385,15 +424,26 @@ void save_omf(const std::string &path, std::vector<omf::segment> &segments, bool
for (auto &s : segments) {
omf_header h;
h.length = s.data.size();
h.length = s.data.size() + s.reserved_space;
h.kind = s.kind;
h.banksize = s.data.size() > 0xffff ? 0x0000 : 0x010000;
h.segnum = s.segnum;
h.alignment = s.alignment;
h.reserved_space = s.reserved_space;
uint32_t reserved_space = 0;
if (expressload) {
std::swap(reserved_space, h.reserved_space);
}
// length field INCLUDES reserved space. Express expand reserved space.
std::vector<uint8_t> data;
// push segname and load name onto data.
data.insert(data.end(), 10, ' ');
// data.insert(data.end(), 10, ' ');
push(data, s.loadname, 10);
push(data, s.segname);
h.dispname = sizeof(omf_header);
@ -402,16 +452,20 @@ void save_omf(const std::string &path, std::vector<omf::segment> &segments, bool
uint32_t lconst_offset = offset + sizeof(omf_header) + data.size() + 5;
uint32_t lconst_size = h.length;
uint32_t lconst_size = s.data.size() + reserved_space;
//lconst record
push(data, (uint8_t)omf::LCONST);
push(data, (uint32_t)h.length);
push(data, (uint32_t)lconst_size);
size_t data_offset = data.size();
data.insert(data.end(), s.data.begin(), s.data.end());
if (reserved_space) {
data.insert(data.end(), reserved_space, 0);
}
uint32_t reloc_offset = offset + sizeof(omf_header) + data.size();
uint32_t reloc_size = 0;
@ -507,4 +561,3 @@ void save_omf(const std::string &path, std::vector<omf::segment> &segments, bool
close(fd);
}

2
omf.h
View File

@ -64,6 +64,8 @@ namespace omf {
uint16_t segnum = 0;
uint16_t kind = 0;
uint32_t alignment = 0;
uint32_t reserved_space = 0;
std::string loadname;
std::string segname;