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Implement SIZEOF("Section") and STARTOF("Section") (#766)

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Updates the object file revision to 8

Fixes #765
This commit is contained in:
Rangi
2021-04-17 18:36:26 -04:00
committed by GitHub
parent 5108c5643c
commit 52797b6f68
14 changed files with 161 additions and 31 deletions
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43
src/link/patch.c
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@@ -292,6 +292,11 @@ static int32_t computeRPNExpr(struct Patch const *patch,
break;
case RPN_BANK_SECT:
/*
* `expression` is not guaranteed to be '\0'-terminated. If it is not,
* `getRPNByte` will have a fatal internal error.
* In either case, `getRPNByte` will not free `expression`.
*/
name = (char const *)expression;
while (getRPNByte(&expression, &size, patch->src, patch->lineNo))
;
@@ -320,6 +325,44 @@ static int32_t computeRPNExpr(struct Patch const *patch,
}
break;
case RPN_SIZEOF_SECT:
/* This has assumptions commented in the `RPN_BANK_SECT` case above. */
name = (char const *)expression;
while (getRPNByte(&expression, &size, patch->src, patch->lineNo))
;
sect = sect_GetSection(name);
if (!sect) {
error(patch->src, patch->lineNo,
"Requested SIZEOF() of section \"%s\", which was not found",
name);
isError = true;
value = 1;
} else {
value = sect->size;
}
break;
case RPN_STARTOF_SECT:
/* This has assumptions commented in the `RPN_BANK_SECT` case above. */
name = (char const *)expression;
while (getRPNByte(&expression, &size, patch->src, patch->lineNo))
;
sect = sect_GetSection(name);
if (!sect) {
error(patch->src, patch->lineNo,
"Requested STARTOF() of section \"%s\", which was not found",
name);
isError = true;
value = 1;
} else {
value = sect->org;
}
break;
case RPN_HRAM:
value = popRPN();
if (!isError && (value < 0