various relocation related optimization

With 59ca5a8db, querying if a symbol is defined is cheap. If we're
compiling code that calls foo() and we defined foo() in this compilation
unit, we already know its offset within the .text section, so use it
instead of emitting a relocation for the linker to handle.  Also, put
small literal data in the .text section instead of .rodata.  This seems
to improve performance (cache locality?), and as a bonus, it will be
good for aarch64's instr encoding with smallish PC-relative offsets.

1 files changed, 1 insertions, 1 deletions

diff --git a/obj/obj.h b/obj/obj.h
index 8e9dea8..59769ff 100644
--- a/obj/obj.h
+++ b/obj/obj.h
@@ -23,7 +23,7 @@ enum section { Snone, Stext, Srodata, Sdata, Sbss };
 
 void objini(const char *infile, const char *outfile);
 void objdeffunc(const char *nam, bool globl, uint off, uint siz);
-enum section objhassym(const char *name);
+enum section objhassym(const char *name, uint *off);
 uint objnewdat(const char *name, enum section, bool globl, uint siz, uint align);
 void objreloc(const char *sym, enum relockind, enum section, uint off, vlong addend);
 void objfini(void);