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diff lwasm/output.c @ 535:a584b9ddffc4
Update raw output to work with RMB only definitions at the start
It seems useful to be able to define a number of symbols at the start of the
source file without generating a run of NUL output. This update adjusts the
output to ignore any number of statements that generate no output as long as
there is a subsequent ORG statement. If there is no ORG statement after
them, the NUL sequence should still appear.
| author | William Astle <lost@l-w.ca> |
|---|---|
| date | Sat, 14 May 2022 21:30:59 -0600 |
| parents | a812bb4d3a51 |
| children | 33a59e232a5b |
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--- a/lwasm/output.c Sat May 14 13:05:43 2022 -0600 +++ b/lwasm/output.c Sat May 14 21:30:59 2022 -0600 @@ -32,6 +32,7 @@ #include <lw_expr.h> #include "lwasm.h" +#include "instab.h" void write_code_raw(asmstate_t *as, FILE *of); void write_code_decb(asmstate_t *as, FILE *of); @@ -245,12 +246,24 @@ raw merely writes all the bytes directly to the file as is. ORG is just a reference for the assembler to handle absolute references. Multiple ORG statements will produce mostly useless results + +However, if a run of RMBs exists at the start that is ended by an ORG +statement, that run of RMBs will not be output as a zero fill. */ void write_code_raw(asmstate_t *as, FILE *of) { line_t *cl; + line_t *sl; - for (cl = as -> line_head; cl; cl = cl -> next) + sl = as -> line_head; + for (cl = sl; cl; cl = cl -> next) + { + if (cl -> outputl > 0) + break; + if (instab[cl -> insn].flags & lwasm_insn_org) + sl = cl; + } + for (cl = sl; cl; cl = cl -> next) { if (cl -> len > 0 && cl -> outputl < 0) {