Thread View: gnu.gdb.bug
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Started by Richard Evans
Thu, 19 Oct 1989 17:09
Functions
Author: Richard Evans
Date: Thu, 19 Oct 1989 17:09
Date: Thu, 19 Oct 1989 17:09
34 lines
2015 bytes
2015 bytes
SUN4/OS4 GDB version 3.1 ------------------------ This is not really a bug but a problem I am having. I am trying to use gdb with a compiler developed here for a strange language (BCPL) which does not use external names for functions - most calls go via a jump table. This causes a problem when trying to use the 'next' command to step over a call to a library routine. The compiler declares the library name in the object file with type N_TEXT (without the N_EXT bit) and so GDB does not record it in its 'misc_functions' structure. As a consequence, trying to 'next' over the call results in a stop at the function entry (because stop_pc does not equal stop_func_start in 'wait_for_inferior'. I just wonder whether N_TEXT names could be recorded even without N_EXT? Also, I have some names declared in a BCOMM/ECOMM block. GDB does not seem to recognise these - is this because they are not C-like objects? Here is a selection of nm -pa output describing these common names: 00000000 - 00 0000 BCOMM BCPL_GV 00000000 - 00 0004 GSYM globalsize:V1 00000004 - 00 0004 GSYM start:V1 00000008 - 00 0004 GSYM stop:V1 00000014 - 00 0004 GSYM result2:V1 000039d8 - 00 0000 ECOMM BCPL_GV ------------------------------------------------------------------------------- Richard Evans Telephone : (+44) 223 462121 Topexpress Ltd Telex : 817911 Topexp G Poseidon House, Castle Park Fax : (+44) 223 315057 Cambridge, CB3 0RD, UK E-Mail : rde@uk.co.topexp -------------------------------------------------------------------------------
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