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Re: GNU as 2.14 on IRIX 6: crashes with shared libs
Eric Christopher writes:
> Unfortunately there's no real pattern for the gas only options. I'd lean
> toward -m<opt> though.
Ok, I'll go with -mpdr/-mno-pdr then. I think it doesn't make sense to use
-mpdr/-no-mpdr here since (unlike e.g. -mips16/-no-mips16 or
-mdebug/-no-mdebug) the `m' is not part of the option name.
> > Btw., I noticed that -mdebug/-no-mdebug are documented neiter in as --help
> > nor in doc/c-mips.texi.
>
> Hmm... I should get to that. Thanks.
Fine, thanks.
While we are speaking of documentation, maybe Daniel could document a
couple of things about the .pdr sections:
* What's the expansion of the pdr acronym?
* What purpose do the .pdr section serve?
* What do you loose without them?
> OK with the option name change.
I'll check in the patch below once my CVS write access is properly set up.
Btw., I noticed that doc/as.texinfo contains another listing of MIPS
specific options (which already mentions -mdebug/-no-mdebug). The revised
patch below adds -mpdr/-mno-pdr there, too.
Thanks.
Rainer
-----------------------------------------------------------------------------
Rainer Orth, Faculty of Technology, Bielefeld University
Tue Jul 22 01:24:35 2003 Rainer Orth <ro@TechFak.Uni-Bielefeld.DE>
* config/tc-mips.c (mips_flag_pdr): Define.
(md_begin) [OBJ_ELF]: Use it to control .pdr creation.
(s_mips_end) [OBJ_ELF]: Likewise.
(md_longopts) [OBJ_ELF]: Define OPTION_PDR, OPTION_NO_PDR.
(md_parse_option) [OBJ_ELF]: Handle them.
(md_show_usage) [OBJ_ELF]: Document -mpdr, -mno-pdr.
* doc/c-mips.texi (MIPS Opts): Document -mpdr, -mno-pdr.
* doc/as.texinfo (Overview) [MIPS]: Likewise.
Index: config/tc-mips.c
===================================================================
RCS file: /cvs/src/src/gas/config/tc-mips.c,v
retrieving revision 1.226
diff -u -p -r1.226 tc-mips.c
--- config/tc-mips.c 15 Jul 2003 07:50:38 -0000 1.226
+++ config/tc-mips.c 22 Jul 2003 13:25:15 -0000
@@ -74,6 +74,15 @@ static int mips_output_flavor (void) { r
int mips_flag_mdebug = -1;
+/* Control generation of .pdr sections. Off by default on IRIX: the native
+ linker doesn't know about and discards them, but relocations against them
+ remain, leading to rld crashes. */
+#ifdef TE_IRIX
+int mips_flag_pdr = FALSE;
+#else
+int mips_flag_pdr = TRUE;
+#endif
+
#include "ecoff.h"
#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
@@ -1283,7 +1292,7 @@ md_begin (void)
(void) bfd_set_section_alignment (stdoutput, sec, 2);
}
#ifdef OBJ_ELF
- else if (OUTPUT_FLAVOR == bfd_target_elf_flavour)
+ else if (OUTPUT_FLAVOR == bfd_target_elf_flavour && mips_flag_pdr)
{
pdr_seg = subseg_new (".pdr", (subsegT) 0);
(void) bfd_set_section_flags (stdoutput, pdr_seg,
@@ -10322,6 +10331,10 @@ struct option md_longopts[] =
{"mdebug", no_argument, NULL, OPTION_MDEBUG},
#define OPTION_NO_MDEBUG (OPTION_ELF_BASE + 8)
{"no-mdebug", no_argument, NULL, OPTION_NO_MDEBUG},
+#define OPTION_PDR (OPTION_ELF_BASE + 9)
+ {"mpdr", no_argument, NULL, OPTION_PDR},
+#define OPTION_NO_PDR (OPTION_ELF_BASE + 10)
+ {"mno-pdr", no_argument, NULL, OPTION_NO_PDR},
#endif /* OBJ_ELF */
{NULL, no_argument, NULL, 0}
@@ -10670,6 +10683,14 @@ md_parse_option (int c, char *arg)
case OPTION_NO_MDEBUG:
mips_flag_mdebug = FALSE;
break;
+
+ case OPTION_PDR:
+ mips_flag_pdr = TRUE;
+ break;
+
+ case OPTION_NO_PDR:
+ mips_flag_pdr = FALSE;
+ break;
#endif /* OBJ_ELF */
default:
@@ -14040,7 +14061,8 @@ s_mips_end (int x ATTRIBUTE_UNUSED)
#ifdef OBJ_ELF
/* Generate a .pdr section. */
- if (OUTPUT_FLAVOR == bfd_target_elf_flavour && ! ECOFF_DEBUGGING)
+ if (OUTPUT_FLAVOR == bfd_target_elf_flavour && ! ECOFF_DEBUGGING
+ && mips_flag_pdr)
{
segT saved_seg = now_seg;
subsegT saved_subseg = now_subseg;
@@ -14525,6 +14547,7 @@ MIPS options:\n\
-KPIC, -call_shared generate SVR4 position independent code\n\
-non_shared do not generate position independent code\n\
-xgot assume a 32 bit GOT\n\
+-mpdr, -mno-pdr enable/disable creation of .pdr sections\n\
-mabi=ABI create ABI conformant object file for:\n"));
first = 1;
Index: doc/as.texinfo
===================================================================
RCS file: /cvs/src/src/gas/doc/as.texinfo,v
retrieving revision 1.86
diff -u -p -r1.86 as.texinfo
--- doc/as.texinfo 12 Jun 2003 14:32:19 -0000 1.86
+++ doc/as.texinfo 22 Jul 2003 13:25:19 -0000
@@ -399,6 +399,7 @@ gcc(1), ld(1), and the Info entries for
[@b{-mips3d}] [@b{-no-mips3d}]
[@b{-mdmx}] [@b{-no-mdmx}]
[@b{-mdebug}] [@b{-no-mdebug}]
+ [@b{-mpdr}] [@b{-mno-pdr}]
@end ifset
@ifset MMIX
Index: doc/c-mips.texi
===================================================================
RCS file: /cvs/src/src/gas/doc/c-mips.texi,v
retrieving revision 1.27
diff -u -p -r1.27 c-mips.texi
--- doc/c-mips.texi 15 Jul 2003 09:02:59 -0000 1.27
+++ doc/c-mips.texi 22 Jul 2003 13:25:19 -0000
@@ -230,6 +230,11 @@ are only supported at Instruction Set Ar
Generate code to take a break exception rather than a trap exception when an
error is detected. This is the default.
+@item -mpdr
+@itemx -mno-pdr
+Control generation of @code{.pdr} sections. Off by default on IRIX, on
+elsewhere.
+
@item -n
When this option is used, @code{@value{AS}} will issue a warning every
time it generates a nop instruction from a macro.