Apple-2-SW/merlin-utils
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misc fixes.

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This commit is contained in:
Kelvin Sherlock 2019-12-09 21:58:01 -05:00
parent 7048c59813
commit f8f698d3d6
1 changed files with 19 additions and 12 deletions
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31
link.cpp
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@ -74,6 +74,8 @@ symbol *find_symbol(const std::string &name) {
struct cookie {
std::string file;
std::vector<unsigned> remap;
//std::vector<std::pair<unsigned, unsigned>> zero;
uint32_t start = 0;
uint32_t length = 0;
};
@ -162,25 +164,25 @@ void process_reloc(byte_view &data, cookie &cookie) {
external = flag & 0x04;
switch(flag & ~0x04) {
case 0xd0:
shift = 16;
shift = -16;
size = 1;
break;
case 0xd1:
shift = 8;
shift = -8;
size = 2;
break;
case 0xd3:
shift = 8;
shift = -8;
size = 1;
break;
default: /* bad */
errx(1, "%s: Unsupported flag: %02x\n", cookie.file.c_str(), flag);
break;
}
data.remove_prefix(4);
} else {
assert((flag & ~(0x0f|0x10|0x20|0x80)) == 0);
unsigned size = 0;
switch(flag & (0x80 + 0x20)) {
case 0:
size = 1;
@ -230,13 +232,17 @@ void process_reloc(byte_view &data, cookie &cookie) {
uint32_t value = 0;
omf::reloc r;
r.size = size;
r.offset = cookie.start; /* ???? */
r.offset = offset; /* ???? */
r.value = value;
r.shift = shift;
seg.relocs.emplace_back(r);
}
/* clear out the inline relocation data */
for(unsigned i = 0; i < size; ++i) {
seg.data[offset + i] = 0;
}
//cookie.zero.emplace_back(std::make_pair(offset, size));
}
}
@ -284,23 +290,24 @@ void process_unit(const std::string &path) {
errx(1, "Invalid aux type %s", path.c_str());
}
omf::segment &seg = segments.back();
seg.data.insert(seg.data.end(), mf.data(), mf.data() + offset);
byte_view data(mf.data() + offset, mf.size() - offset);
cookie.start = seg.data.size();
cookie.length = offset;
cookie.file = path;
seg.data.insert(seg.data.end(), mf.data(), mf.data() + offset);
byte_view data(mf.data() + offset, mf.size() - offset);
byte_view rr = data;
/* skip over the relocation records so we can process the labels first. */
/* this is so external references can use the global symbol id */
assert(data.size() >= 2);
for(;;) {
assert(data.size() >= 6);
if (data[0] == 0) break;
assert(data.size() >= 6);
data.remove_prefix(4);
}
data.remove_prefix(1);