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Implement mid-section alignment directive

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Fixes #254.
This commit is contained in:
ISSOtm
2020-04-08 12:28:53 +02:00
parent 2b0c34ecb5
commit 665412c073
7 changed files with 65 additions and 0 deletions
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22
src/asm/section.c
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@@ -354,6 +354,28 @@ uint32_t sect_GetOutputOffset(void)
return curOffset + loadOffset;
}
void sect_AlignPC(uint8_t alignment, uint16_t offset)
{
struct Section *sect = sect_GetSymbolSection();
if (sect->nOrg != -1) {
if ((sym_GetValue(pPCSymbol) - offset) % (1 << alignment))
yyerror("Section's fixed address fails required alignment (PC = $%04x)",
sym_GetValue(pPCSymbol));
} else if (sect->nAlign != 0) {
if ((((sect->alignOfs + curOffset) % (1 << sect->nAlign)) - offset) % (1 << alignment)) {
yyerror("Section's alignment fails required alignment (offset from section start = $%04x)",
curOffset);
} else if (alignment > sect->nAlign) {
sect->nAlign = alignment;
sect->alignOfs = (offset - curOffset) % (1 << alignment);
}
} else {
sect->nAlign = alignment;
sect->alignOfs = offset;
}
}
static inline void growSection(uint32_t growth)
{
curOffset += growth;