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Add section fragments

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Fixes #517, and hopefully enables RGBDS as a SDCC back-end
This commit is contained in:
ISSOtm
2020-07-21 19:53:40 +02:00
parent aca00e4fce
commit 1f2f797cb9
17 changed files with 174 additions and 50 deletions
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26
src/link/object.c
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@@ -266,10 +266,16 @@ static void readSection(FILE *file, struct Section *section,
errx(1, "\"%s\"'s section size (%" PRId32 ") is invalid",
section->name, tmp);
section->size = tmp;
section->offset = 0;
tryGetc(byte, file, "%s: Cannot read \"%s\"'s type: %s",
fileName, section->name);
section->type = byte & 0x7F;
section->isUnion = byte >> 7;
section->type = byte & 0x3F;
if (byte >> 7)
section->modifier = SECTION_UNION;
else if (byte >> 6)
section->modifier = SECTION_FRAGMENT;
else
section->modifier = SECTION_NORMAL;
tryReadlong(tmp, file, "%s: Cannot read \"%s\"'s org: %s",
fileName, section->name);
section->isAddressFixed = tmp >= 0;
@@ -382,7 +388,7 @@ static void readAssertion(FILE *file, struct Assertion *assert,
static inline struct Section *getMainSection(struct Section *section)
{
if (section->isUnion)
if (section->modifier != SECTION_NORMAL)
section = sect_GetSection(section->name);
return section;
@@ -502,10 +508,18 @@ void obj_ReadFile(char const *fileName)
if (sectionID == -1) {
fileSymbols[i]->section = NULL;
} else {
struct Section *section = fileSections[sectionID];
/* Give the section a pointer to the symbol as well */
linkSymToSect(fileSymbols[i], fileSections[sectionID]);
fileSymbols[i]->section =
getMainSection(fileSections[sectionID]);
linkSymToSect(fileSymbols[i], section);
if (section->modifier != SECTION_NORMAL) {
if (section->modifier == SECTION_FRAGMENT)
/* Add the fragment's offset to the symbol's */
fileSymbols[i]->offset += section->offset;
section = getMainSection(section);
}
fileSymbols[i]->section = section;
}
}