Assembler 'gas' bugs?

Altera_Forum · ‎11-11-2010

Hi,

I'd compiled the library 'glib' and experienced a strange phenomenon. The attached file 'garray.s' is the assembly one that is generated from 'garray.c' of 'glib-2.24.2'. When I assembled it, the relocation date for 'R_NIOS2_PCREL_LO' inside the function 'g_ptr_array_new' became

00001390  00003817 R_NIOS2_CALL16    00000000   memset + 0
000013d4  0000351b R_NIOS2_PCREL_HA  00000000   _GLOBAL_OFFSET_TABLE_ + 0
000013d8  0000351a R_NIOS2_PCREL_LO  00000000   _GLOBAL_OFFSET_TABLE_ + 20     <---
000013e4  00005317 R_NIOS2_CALL16    00001404   g_ptr_array_sized_new + 0

. Of course the right relocation data must be


00001390  00003417 R_NIOS2_CALL16    00000000   memset + 0
000013d4  0000311b R_NIOS2_PCREL_HA  00000000   _GLOBAL_OFFSET_TABLE_ + 0
000013d8  0000311a R_NIOS2_PCREL_LO  00000000   _GLOBAL_OFFSET_TABLE_ + 4      <---
000013e4  00004f17 R_NIOS2_CALL16    00001404   g_ptr_array_sized_new + 0

.

I think this is a bug of 'gas' itself and not one of Nios ported part. Inside the 'gas', 'obstack chunk' is used to store the location data, but something is wrong to allocate a new chunk. The easiest and negative way to avoid this is only to increase the chunk size which is defined in the file 'as.c'. Please refer the attached 'diff' for the details.

Kazu