implement line number info tracking

Support "file" and "loc" directives. "file" takes a string (a file name)
assigns it a number, sets the current file to that number and records
the string for later. "loc" takes a single number and outputs location
information with a reference to the current file.

1 files changed, 3 insertions, 1 deletions

diff --git a/all.h b/all.h
index b6591f0..4d36314 100644
--- a/all.h
+++ b/all.h
@@ -502,7 +502,7 @@ bshas(BSet *bs, uint elt)
 
 /* parse.c */
 extern Op optab[NOp];
-void parse(FILE *, char *, void (Dat *), void (Fn *));
+void parse(FILE *, char *, void (char *), void (Dat *), void (Fn *));
 void printfn(Fn *, FILE *);
 void printref(Ref, Fn *, FILE *);
 void err(char *, ...) __attribute__((noreturn));
@@ -568,6 +568,8 @@ void rega(Fn *);
 /* emit.c */
 void emitfnlnk(char *, Lnk *, FILE *);
 void emitdat(Dat *, FILE *);
+void emitdbgfile(char *, FILE *);
+void emitdbgloc(uint, FILE *);
 int stashbits(void *, int);
 void elf_emitfnfin(char *, FILE *);
 void elf_emitfin(FILE *);