Ticket #366 (Fixed)Sat Nov 30 14:48:06 UTC 2013

Norcroft 5.69 doesn't show module relocation offsets correctly in assembler output

Details by Jeffrey Lee (213):

When generating module code and asked to produce assembler output, the output file will IMPORT the _Mod$Reloc$Off symbol but not actually use it anywhere. For example, given the following input:

<pre>
#include <stdio.h>

const char *foo[] =
{
“bar”
};

void wibble (void)
{
puts (foo⁰);
}
</pre>

and compiled with “cc -s -zM -c test.c -o test.s” we get the following output:

<pre>
; generated by Norcroft RISC OS ARM C vsn 5.69 [27 Mar 2011]

wibble
LDR a1,[pc, #L000014-.-8]
LDR a2,[sl,#-0]
LDR a1,[a2,a1]
B puts
L000014
DCD foo

foo
DCD |x$codeseg|

</pre>

The sl-relative LDR should really appear as “LDR a2,[sl,#-|_Mod$Reloc$Off|]” but instead we just get “LDR a2,[sl,#-0]”