Apple-2-SW/merlin-utils
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ALI and DS support

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This commit is contained in:
Kelvin Sherlock 2019-12-15 13:03:43 -05:00
parent c341d9a54f
commit 34523bbecf
3 changed files with 37 additions and 8 deletions
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14
link.cpp
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@ -752,11 +752,17 @@ void evaluate(label_t label, opcode_t opcode, const char *cursor) {
case OP_ALI: {
uint32_t align = number_operand(cursor, local_symbol_table);
// must be power of 2 or 0
if ((align & (align-1)) == 0) {
// not yet supported.
} else {
if (align & (align-1))
throw std::runtime_error("Bad alignment");
}
segments.back().alignment = align;
break;
}
case OP_DS: {
// todo - how is this handled in binary linker?
uint32_t ds = number_operand(cursor, local_symbol_table);
segments.back().reserved_space = ds;
break;
}

29
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;
@ -385,15 +391,26 @@ 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 +419,20 @@ 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;

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;