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bug fixes.

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- didn't generate SUPER for 3-byte, no shift interseg
- labels not properly truncated at 255.
This commit is contained in:
Kelvin Sherlock 2019-12-14 19:09:47 -05:00
parent 5f9d1a900d
commit 236dc538b0
1 changed files with 13 additions and 7 deletions
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20
omf.cpp
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@ -63,6 +63,9 @@ struct omf_express_header {
#pragma pack(pop)
static_assert(sizeof(omf_header) == 44, "OMF Header not packed");
static_assert(sizeof(omf_express_header) == 48, "OMF Express Header not packed");
void push(std::vector<uint8_t> &v, uint8_t x) {
v.push_back(x);
}
@ -86,7 +89,7 @@ void push(std::vector<uint8_t> &v, uint32_t x) {
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());
v.insert(v.end(), s.begin(), s.begin() + count);
}
class super_helper {
@ -201,9 +204,9 @@ uint32_t add_relocs(std::vector<uint8_t> &data, size_t data_offset, omf::segment
auto &sr = ss[n];
if (!sr) sr.emplace();
sr->append(r.offset);
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;
@ -217,9 +220,9 @@ uint32_t add_relocs(std::vector<uint8_t> &data, size_t data_offset, omf::segment
auto &sr = ss[n];
if (!sr) sr.emplace();
sr->append(r.offset);
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;
@ -231,9 +234,9 @@ uint32_t add_relocs(std::vector<uint8_t> &data, size_t data_offset, omf::segment
int n = SUPER_INTERSEG24 + seg.segnum;
auto &sr = ss[n];
if (!sr) sr.emplace();
sr->append(r.offset);
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;
@ -265,8 +268,10 @@ uint32_t add_relocs(std::vector<uint8_t> &data, size_t data_offset, omf::segment
constexpr int n = SUPER_INTERSEG1;
auto &sr = ss[n];
if (!sr) sr.emplace();
sr->append(r.offset);
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;
@ -279,9 +284,9 @@ uint32_t add_relocs(std::vector<uint8_t> &data, size_t data_offset, omf::segment
int n = SUPER_INTERSEG12 + r.segment;
auto &sr = ss[n];
if (!sr) sr.emplace();
sr->append(r.offset);
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;
@ -292,9 +297,9 @@ uint32_t add_relocs(std::vector<uint8_t> &data, size_t data_offset, omf::segment
int n = SUPER_INTERSEG24 + r.segment;
auto &sr = ss[n];
if (!sr) sr.emplace();
sr->append(r.offset);
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;
@ -501,4 +506,5 @@ void save_omf(const std::string &path, std::vector<omf::segment> &segments, bool
}
close(fd);
}
}