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Make RGBLINK able to link SDCC object files

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This requires a LOT of tricky code, mostly due to the format itself being,
er, not the most straightforward.
Everything is converted to existing RGBLINK concepts (sections, patches,
etc.), so the core code is essentially unchanged.
(A couple of genuine RGBLINK bugs were uncovered along the way, so some of
the core code *is* changed, notably regarding `SECTION FRAGMENT`s.)

All of this code was clean-roomed, so SDCC's GPLv2 license does not apply.
This commit is contained in:
ISSOtm
2022-07-10 10:50:33 +02:00
committed by Eldred Habert
parent 1c2965467d
commit 828b2adcdf
16 changed files with 922 additions and 71 deletions
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28
src/link/main.c
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@@ -29,6 +29,7 @@
#include "extern/getopt.h"
#include "error.h"
#include "linkdefs.h"
#include "platform.h"
#include "version.h"
@@ -350,6 +351,12 @@ next:
}
}
_Noreturn void reportErrors(void) {
fprintf(stderr, "Linking failed with %" PRIu32 " error%s\n",
nbErrors, nbErrors == 1 ? "" : "s");
exit(1);
}
int main(int argc, char *argv[])
{
int optionChar;
@@ -457,7 +464,15 @@ int main(int argc, char *argv[])
while ((placement = script_NextSection())) {
struct Section *section = placement->section;
assert(section->offset == 0);
/* Check if this doesn't conflict with what the code says */
if (section->type == SECTTYPE_INVALID) {
for (struct Section *sect = section; sect; sect = sect->nextu)
sect->type = placement->type; // SDCC "unknown" sections
} else if (section->type != placement->type) {
error(NULL, 0, "Linker script contradicts \"%s\"'s type",
section->name);
}
if (section->isBankFixed && placement->bank != section->bank)
error(NULL, 0, "Linker script contradicts \"%s\"'s bank placement",
section->name);
@@ -479,22 +494,25 @@ int main(int argc, char *argv[])
fclose(linkerScript);
script_Cleanup();
// If the linker script produced any errors, some sections may be in an invalid state
if (nbErrors != 0)
reportErrors();
}
/* then process them, */
obj_DoSanityChecks();
if (nbErrors != 0)
reportErrors();
assign_AssignSections();
obj_CheckAssertions();
assign_Cleanup();
/* and finally output the result. */
patch_ApplyPatches();
if (nbErrors) {
fprintf(stderr, "Linking failed with %" PRIu32 " error%s\n",
nbErrors, nbErrors == 1 ? "" : "s");
exit(1);
}
if (nbErrors != 0)
reportErrors();
out_WriteFiles();
/* Do cleanup before quitting, though. */