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Re: Last take: approval for MIPS_STABS_ELF killing
- From: Daniel Jacobowitz <drow at mvista dot com>
- To: binutils at sources dot redhat dot com
- Date: Thu, 13 Jun 2002 14:39:18 -0400
- Subject: Re: Last take: approval for MIPS_STABS_ELF killing
- References: <20020612221712.GA8146@nevyn.them.org>
On Wed, Jun 12, 2002 at 06:17:12PM -0400, Daniel Jacobowitz wrote:
> Eric approved the MIPS portion of this offline. Could a global write
> maintainer look over the generic bits, please?
H.J.'s new GCC patches (which I still disapprove of...) turned up a
possible segfault in the s_mips_file changes I got from him earlier.
Here's an update with only that changed.
--
Daniel Jacobowitz Carnegie Mellon University
MontaVista Software Debian GNU/Linux Developer
2002-06-11 H.J. Lu <hjl@gnu.org>
Daniel Jacobowitz <drow@mvista.com>
* dwarf2dbg.h (dwarf2_directive_file): Return char *.
* dwarf2dbg.c (dwarf2_directive_file): Return filename.
* config/tc-mips.c (s_mips_file): Call s_app_file_string
and new_logical_line for the first .file directive.
* read.c (s_app_file_string): New function.
(s_app_file): Call it.
* read.h (s_app_file_string): Add declaration.
2002-06-11 Daniel Jacobowitz <drow@mvista.com>
* configure.in: Remove MIPS_STABS_ELF.
* configure: Regenerated.
* config.in: Regenerated.
* config/obj-elf.h (ECOFF_DEBUGGING): Define to mips_flag_mdebug
for MIPS targets.
* config/tc-mips.c (mips_pseudo_table): Remove #ifdef around
".extern".
(pdr_seg): Declare unconditionally.
(md_begin): Always generate .pdr unless ECOFF_DEBUGGING or not ELF.
(s_mips_end): Likewise. Generate stabs function markers.
(s_mips_ent): Generate stabs function markers.
(s_mips_frame): Always generate .pdr unless ECOFF_DEBUGGING or not
ELF.
(s_mips_mask): Likewise.
(mips_flag_mdebug): New.
(md_longopts): Add "mdebug" and "no-mdebug".
(md_parse_options): Add OPTION_MDEBUG and OPTION_NO_MDEBUG.
(mips_after_parse_args): Set mips_flag_mdebug.
* doc/as.texinfo: Add "-mdebug" and "-no-mdebug" for MIPS.
2002-06-11 Daniel Jacobowitz <drow@mvista.com>
* gas/mips/lineno.d: Use --gstabs.
* gas/mips/mips.exp (lineno.s): Remove XFAIL.
Index: configure.in
===================================================================
RCS file: /cvs/src/src/gas/configure.in,v
retrieving revision 1.107
diff -u -p -r1.107 configure.in
--- configure.in 9 Jun 2002 00:45:41 -0000 1.107
+++ configure.in 11 Jun 2002 21:13:04 -0000
@@ -170,7 +170,6 @@ changequote([,])dnl
dev=no
bfd_gas=no
em=generic
- mips_stabs_elf=
# assign object format
case ${generic_target} in
@@ -373,13 +372,13 @@ changequote([,])dnl
mips-*-irix*) fmt=ecoff ;;
mips-*-lnews*) fmt=ecoff em=lnews ;;
mips-*-riscos*) fmt=ecoff ;;
- mips*-*-linux*) fmt=elf em=tmips mips_stabs_elf=y ;;
+ mips*-*-linux*) fmt=elf em=tmips ;;
mips-*-sysv4*MP* | mips-*-gnu*)
fmt=elf em=tmips ;;
mips-*-sysv*) fmt=ecoff ;;
mips-*-elf* | mips-*-rtems* | mips-*-netbsd* | mips-*-openbsd*)
fmt=elf ;;
- mips-*-vxworks*) fmt=elf mips_stabs_elf=y ;;
+ mips-*-vxworks*) fmt=elf ;;
mmix-*-*) fmt=elf bfd_gas=yes ;;
mn10200-*-*) fmt=elf bfd_gas=yes ;;
mn10300-*-*) fmt=elf bfd_gas=yes ;;
@@ -522,11 +521,6 @@ changequote([,])dnl
AC_DEFINE_UNQUOTED(TARGET_BYTES_BIG_ENDIAN, $endian_def,
[Define as 1 if big endian.])
fi
- fi
-
- if test x${mips_stabs_elf} != x; then
- AC_DEFINE(MIPS_STABS_ELF, 1,
- [Use ELF stabs for MIPS, not ECOFF stabs])
fi
case ${cpu_type}-${fmt} in
Index: dwarf2dbg.c
===================================================================
RCS file: /cvs/src/src/gas/dwarf2dbg.c,v
retrieving revision 1.50
diff -u -p -r1.50 dwarf2dbg.c
--- dwarf2dbg.c 23 May 2002 06:51:41 -0000 1.50
+++ dwarf2dbg.c 11 Jun 2002 21:13:07 -0000
@@ -346,7 +346,7 @@ get_filenum (filename)
/* Handle the .file directive. */
-void
+char *
dwarf2_directive_file (dummy)
int dummy ATTRIBUTE_UNUSED;
{
@@ -359,7 +359,7 @@ dwarf2_directive_file (dummy)
if (*input_line_pointer == '"')
{
s_app_file (0);
- return;
+ return NULL;
}
num = get_absolute_expression ();
@@ -369,13 +369,13 @@ dwarf2_directive_file (dummy)
if (num < 1)
{
as_bad (_("file number less than one"));
- return;
+ return NULL;
}
if (num < (int) files_in_use && files[num].filename != 0)
{
as_bad (_("file number %ld already allocated"), (long) num);
- return;
+ return NULL;
}
if (num >= (int) files_allocated)
@@ -393,6 +393,8 @@ dwarf2_directive_file (dummy)
files[num].filename = filename;
files[num].dir = 0;
files_in_use = num + 1;
+
+ return filename;
}
void
Index: dwarf2dbg.h
===================================================================
RCS file: /cvs/src/src/gas/dwarf2dbg.h,v
retrieving revision 1.10
diff -u -p -r1.10 dwarf2dbg.h
--- dwarf2dbg.h 8 Mar 2001 23:24:22 -0000 1.10
+++ dwarf2dbg.h 11 Jun 2002 21:13:07 -0000
@@ -36,7 +36,7 @@ struct dwarf2_line_info {
/* Implements the .file FILENO "FILENAME" directive. FILENO can be 0
to indicate that no file number has been assigned. All real file
number must be >0. */
-extern void dwarf2_directive_file PARAMS ((int dummy));
+extern char *dwarf2_directive_file PARAMS ((int dummy));
/* Implements the .loc FILENO LINENO [COLUMN] directive. FILENO is
the file number, LINENO the line number and the (optional) COLUMN
Index: read.c
===================================================================
RCS file: /cvs/src/src/gas/read.c,v
retrieving revision 1.51
diff -u -p -r1.51 read.c
--- read.c 3 May 2002 02:25:33 -0000 1.51
+++ read.c 11 Jun 2002 21:13:20 -0000
@@ -1572,6 +1572,20 @@ s_data (ignore)
.file. */
void
+s_app_file_string (file)
+ char *file;
+{
+#ifdef LISTING
+ if (listing)
+ listing_source_file (file);
+#endif
+ register_dependency (file);
+#ifdef obj_app_file
+ obj_app_file (file);
+#endif
+}
+
+void
s_app_file (appfile)
int appfile;
{
@@ -1596,16 +1610,7 @@ s_app_file (appfile)
demand_empty_rest_of_line ();
if (!may_omit)
- {
-#ifdef LISTING
- if (listing)
- listing_source_file (s);
-#endif
- register_dependency (s);
-#ifdef obj_app_file
- obj_app_file (s);
-#endif
- }
+ s_app_file_string (s);
}
}
Index: read.h
===================================================================
RCS file: /cvs/src/src/gas/read.h,v
retrieving revision 1.14
diff -u -p -r1.14 read.h
--- read.h 12 Oct 2001 08:56:17 -0000 1.14
+++ read.h 11 Jun 2002 21:13:21 -0000
@@ -137,6 +137,7 @@ extern void generate_lineno_debug PARAMS
extern void s_abort PARAMS ((int)) ATTRIBUTE_NORETURN;
extern void s_align_bytes PARAMS ((int arg));
extern void s_align_ptwo PARAMS ((int));
+extern void s_app_file_string PARAMS ((char *));
extern void s_app_file PARAMS ((int));
extern void s_app_line PARAMS ((int));
extern void s_bad_endr PARAMS ((int));
Index: config/obj-elf.h
===================================================================
RCS file: /cvs/src/src/gas/config/obj-elf.h,v
retrieving revision 1.16
diff -u -p -r1.16 obj-elf.h
--- config/obj-elf.h 8 Jun 2002 16:04:35 -0000 1.16
+++ config/obj-elf.h 11 Jun 2002 21:13:22 -0000
@@ -48,11 +48,8 @@ extern int alpha_flag_mdebug;
/* For now, always set ECOFF_DEBUGGING for a MIPS target. */
#ifdef TC_MIPS
-#ifdef MIPS_STABS_ELF
-#define ECOFF_DEBUGGING 0
-#else
-#define ECOFF_DEBUGGING (debug_type == DEBUG_ECOFF)
-#endif /* MIPS_STABS_ELF */
+#define ECOFF_DEBUGGING mips_flag_mdebug
+extern int mips_flag_mdebug;
#endif /* TC_MIPS */
#ifdef OBJ_MAYBE_ECOFF
Index: config/tc-mips.c
===================================================================
RCS file: /cvs/src/src/gas/config/tc-mips.c,v
retrieving revision 1.142
diff -u -p -r1.142 tc-mips.c
--- config/tc-mips.c 8 Jun 2002 07:37:15 -0000 1.142
+++ config/tc-mips.c 11 Jun 2002 21:13:55 -0000
@@ -77,6 +77,8 @@ static int mips_output_flavor () { retur
#define ECOFF_DEBUGGING 0
#endif
+int mips_flag_mdebug = -1;
+
#include "ecoff.h"
#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
@@ -885,9 +887,7 @@ static const pseudo_typeS mips_pseudo_ta
{"text", s_change_sec, 't'},
{"word", s_cons, 2},
-#ifdef MIPS_STABS_ELF
{ "extern", ecoff_directive_extern, 0},
-#endif
{ NULL, NULL, 0 },
};
@@ -967,11 +967,10 @@ static boolean imm_unmatched_hi;
static boolean mips16_small, mips16_ext;
-#ifdef MIPS_STABS_ELF
-/* The pdr segment for per procedure frame/regmask info */
+/* The pdr segment for per procedure frame/regmask info. Not used for
+ ECOFF debugging. */
static segT pdr_seg;
-#endif
static const char *
mips_isa_to_str (isa)
@@ -1224,12 +1223,15 @@ md_begin ()
SEC_HAS_CONTENTS | SEC_READONLY);
(void) bfd_set_section_alignment (stdoutput, sec, 2);
}
-
-#ifdef MIPS_STABS_ELF
- pdr_seg = subseg_new (".pdr", (subsegT) 0);
- (void) bfd_set_section_flags (stdoutput, pdr_seg,
- SEC_READONLY | SEC_RELOC | SEC_DEBUGGING);
- (void) bfd_set_section_alignment (stdoutput, pdr_seg, 2);
+#ifdef OBJ_ELF
+ else if (OUTPUT_FLAVOR == bfd_target_elf_flavour)
+ {
+ pdr_seg = subseg_new (".pdr", (subsegT) 0);
+ (void) bfd_set_section_flags (stdoutput, pdr_seg,
+ SEC_READONLY | SEC_RELOC
+ | SEC_DEBUGGING);
+ (void) bfd_set_section_alignment (stdoutput, pdr_seg, 2);
+ }
#endif
subseg_set (seg, subseg);
@@ -9929,6 +9931,10 @@ struct option md_longopts[] =
{"n32", no_argument, NULL, OPTION_N32},
#define OPTION_64 (OPTION_ELF_BASE + 6)
{"64", no_argument, NULL, OPTION_64},
+#define OPTION_MDEBUG (OPTION_ELF_BASE + 7)
+ {"mdebug", no_argument, NULL, OPTION_MDEBUG},
+#define OPTION_NO_MDEBUG (OPTION_ELF_BASE + 8)
+ {"no-mdebug", no_argument, NULL, OPTION_NO_MDEBUG},
#endif /* OBJ_ELF */
{NULL, no_argument, NULL, 0}
};
@@ -10295,6 +10301,16 @@ md_parse_option (c, arg)
mips_7000_hilo_fix = false;
break;
+#ifdef OBJ_ELF
+ case OPTION_MDEBUG:
+ mips_flag_mdebug = true;
+ break;
+
+ case OPTION_NO_MDEBUG:
+ mips_flag_mdebug = false;
+ break;
+#endif /* OBJ_ELF */
+
default:
return 0;
}
@@ -10650,6 +10666,16 @@ mips_after_parse_args ()
if (HAVE_NEWABI)
mips_big_got = 1;
+
+ if (mips_flag_mdebug < 0)
+ {
+#ifdef OBJ_MAYBE_ECOFF
+ if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour)
+ mips_flag_mdebug = 1;
+ else
+#endif /* OBJ_MAYBE_ECOFF */
+ mips_flag_mdebug = 0;
+ }
}
void
@@ -13366,13 +13392,30 @@ static void
s_mips_file (x)
int x ATTRIBUTE_UNUSED;
{
+ static int first_file_directive = 1;
+
if (ECOFF_DEBUGGING)
{
get_number ();
s_app_file (0);
}
else
- dwarf2_directive_file (0);
+ {
+ char *filename;
+
+ filename = dwarf2_directive_file (0);
+
+ /* Versions of GCC up to 3.1 start files with a ".file"
+ directive even for stabs output. Make sure that this
+ ".file" is handled. Note that you need a version of GCC
+ after 3.1 in order to support DWARF-2 on MIPS. */
+ if (filename != NULL && first_file_directive)
+ {
+ (void) new_logical_line (filename, -1);
+ s_app_file_string (filename);
+ }
+ first_file_directive = 0;
+ }
}
/* The .loc directive, implying DWARF-2. */
@@ -13433,46 +13476,52 @@ s_mips_end (x)
assert (S_GET_NAME (p));
if (strcmp (S_GET_NAME (p), S_GET_NAME (cur_proc_ptr->isym)))
as_warn (_(".end symbol does not match .ent symbol."));
+
+ if (debug_type == DEBUG_STABS)
+ stabs_generate_asm_endfunc (S_GET_NAME (p),
+ S_GET_NAME (p));
}
else
as_warn (_(".end directive missing or unknown symbol"));
-#ifdef MIPS_STABS_ELF
- {
- segT saved_seg = now_seg;
- subsegT saved_subseg = now_subseg;
- valueT dot;
- expressionS exp;
- char *fragp;
+#ifdef OBJ_ELF
+ /* Generate a .pdr section. */
+ if (OUTPUT_FLAVOR == bfd_target_elf_flavour && ! ECOFF_DEBUGGING)
+ {
+ segT saved_seg = now_seg;
+ subsegT saved_subseg = now_subseg;
+ valueT dot;
+ expressionS exp;
+ char *fragp;
- dot = frag_now_fix ();
+ dot = frag_now_fix ();
#ifdef md_flush_pending_output
- md_flush_pending_output ();
+ md_flush_pending_output ();
#endif
- assert (pdr_seg);
- subseg_set (pdr_seg, 0);
+ assert (pdr_seg);
+ subseg_set (pdr_seg, 0);
+
+ /* Write the symbol. */
+ exp.X_op = O_symbol;
+ exp.X_add_symbol = p;
+ exp.X_add_number = 0;
+ emit_expr (&exp, 4);
+
+ fragp = frag_more (7 * 4);
- /* Write the symbol. */
- exp.X_op = O_symbol;
- exp.X_add_symbol = p;
- exp.X_add_number = 0;
- emit_expr (&exp, 4);
-
- fragp = frag_more (7 * 4);
-
- md_number_to_chars (fragp, (valueT) cur_proc_ptr->reg_mask, 4);
- md_number_to_chars (fragp + 4, (valueT) cur_proc_ptr->reg_offset, 4);
- md_number_to_chars (fragp + 8, (valueT) cur_proc_ptr->fpreg_mask, 4);
- md_number_to_chars (fragp + 12, (valueT) cur_proc_ptr->fpreg_offset, 4);
- md_number_to_chars (fragp + 16, (valueT) cur_proc_ptr->frame_offset, 4);
- md_number_to_chars (fragp + 20, (valueT) cur_proc_ptr->frame_reg, 4);
- md_number_to_chars (fragp + 24, (valueT) cur_proc_ptr->pc_reg, 4);
-
- subseg_set (saved_seg, saved_subseg);
- }
-#endif /* MIPS_STABS_ELF */
+ md_number_to_chars (fragp, (valueT) cur_proc_ptr->reg_mask, 4);
+ md_number_to_chars (fragp + 4, (valueT) cur_proc_ptr->reg_offset, 4);
+ md_number_to_chars (fragp + 8, (valueT) cur_proc_ptr->fpreg_mask, 4);
+ md_number_to_chars (fragp + 12, (valueT) cur_proc_ptr->fpreg_offset, 4);
+ md_number_to_chars (fragp + 16, (valueT) cur_proc_ptr->frame_offset, 4);
+ md_number_to_chars (fragp + 20, (valueT) cur_proc_ptr->frame_reg, 4);
+ md_number_to_chars (fragp + 24, (valueT) cur_proc_ptr->pc_reg, 4);
+
+ subseg_set (saved_seg, saved_subseg);
+ }
+#endif /* OBJ_ELF */
cur_proc_ptr = NULL;
}
@@ -13526,6 +13575,10 @@ s_mips_ent (aent)
symbol_get_bfdsym (symbolP)->flags |= BSF_FUNCTION;
++numprocs;
+
+ if (debug_type == DEBUG_STABS)
+ stabs_generate_asm_func (S_GET_NAME (symbolP),
+ S_GET_NAME (symbolP));
}
demand_empty_rest_of_line ();
@@ -13541,36 +13594,38 @@ static void
s_mips_frame (ignore)
int ignore ATTRIBUTE_UNUSED;
{
-#ifdef MIPS_STABS_ELF
+#ifdef OBJ_ELF
+ if (OUTPUT_FLAVOR == bfd_target_elf_flavour && ! ECOFF_DEBUGGING)
+ {
+ long val;
- long val;
+ if (cur_proc_ptr == (procS *) NULL)
+ {
+ as_warn (_(".frame outside of .ent"));
+ demand_empty_rest_of_line ();
+ return;
+ }
- if (cur_proc_ptr == (procS *) NULL)
- {
- as_warn (_(".frame outside of .ent"));
- demand_empty_rest_of_line ();
- return;
- }
+ cur_proc_ptr->frame_reg = tc_get_register (1);
+
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer++ != ','
+ || get_absolute_expression_and_terminator (&val) != ',')
+ {
+ as_warn (_("Bad .frame directive"));
+ --input_line_pointer;
+ demand_empty_rest_of_line ();
+ return;
+ }
- cur_proc_ptr->frame_reg = tc_get_register (1);
+ cur_proc_ptr->frame_offset = val;
+ cur_proc_ptr->pc_reg = tc_get_register (0);
- SKIP_WHITESPACE ();
- if (*input_line_pointer++ != ','
- || get_absolute_expression_and_terminator (&val) != ',')
- {
- as_warn (_("Bad .frame directive"));
- --input_line_pointer;
demand_empty_rest_of_line ();
- return;
}
-
- cur_proc_ptr->frame_offset = val;
- cur_proc_ptr->pc_reg = tc_get_register (0);
-
- demand_empty_rest_of_line ();
-#else
- s_ignore (ignore);
-#endif /* MIPS_STABS_ELF */
+ else
+#endif /* OBJ_ELF */
+ s_ignore (ignore);
}
/* The .fmask and .mask directives. If the mdebug section is present
@@ -13583,41 +13638,44 @@ static void
s_mips_mask (reg_type)
char reg_type;
{
-#ifdef MIPS_STABS_ELF
- long mask, off;
-
- if (cur_proc_ptr == (procS *) NULL)
+#ifdef OBJ_ELF
+ if (OUTPUT_FLAVOR == bfd_target_elf_flavour && ! ECOFF_DEBUGGING)
{
- as_warn (_(".mask/.fmask outside of .ent"));
- demand_empty_rest_of_line ();
- return;
- }
+ long mask, off;
- if (get_absolute_expression_and_terminator (&mask) != ',')
- {
- as_warn (_("Bad .mask/.fmask directive"));
- --input_line_pointer;
- demand_empty_rest_of_line ();
- return;
- }
+ if (cur_proc_ptr == (procS *) NULL)
+ {
+ as_warn (_(".mask/.fmask outside of .ent"));
+ demand_empty_rest_of_line ();
+ return;
+ }
- off = get_absolute_expression ();
+ if (get_absolute_expression_and_terminator (&mask) != ',')
+ {
+ as_warn (_("Bad .mask/.fmask directive"));
+ --input_line_pointer;
+ demand_empty_rest_of_line ();
+ return;
+ }
- if (reg_type == 'F')
- {
- cur_proc_ptr->fpreg_mask = mask;
- cur_proc_ptr->fpreg_offset = off;
+ off = get_absolute_expression ();
+
+ if (reg_type == 'F')
+ {
+ cur_proc_ptr->fpreg_mask = mask;
+ cur_proc_ptr->fpreg_offset = off;
+ }
+ else
+ {
+ cur_proc_ptr->reg_mask = mask;
+ cur_proc_ptr->reg_offset = off;
+ }
+
+ demand_empty_rest_of_line ();
}
else
- {
- cur_proc_ptr->reg_mask = mask;
- cur_proc_ptr->reg_offset = off;
- }
-
- demand_empty_rest_of_line ();
-#else
- s_ignore (reg_type);
-#endif /* MIPS_STABS_ELF */
+#endif /* OBJ_ELF */
+ s_ignore (reg_type);
}
/* The .loc directive. */
Index: doc/as.texinfo
===================================================================
RCS file: /cvs/src/src/gas/doc/as.texinfo,v
retrieving revision 1.65
diff -u -p -r1.65 as.texinfo
--- doc/as.texinfo 7 Jun 2002 23:07:19 -0000 1.65
+++ doc/as.texinfo 11 Jun 2002 21:14:21 -0000
@@ -382,6 +382,7 @@ gcc(1), ld(1), and the Info entries for
[@b{-mips16}] [@b{-no-mips16}]
[@b{-mips3d}] [@b{-no-mips3d}]
[@b{-mdmx}] [@b{-no-mdmx}]
+ [@b{-mdebug}] [@b{-no-mdebug}]
@end ifset
@ifset MMIX
@@ -891,6 +892,11 @@ Schedule and tune for a particular @sc{m
@itemx -mno-fix7000
Cause nops to be inserted if the read of the destination register
of an mfhi or mflo instruction occurs in the following two instructions.
+
+@item -mdebug
+@itemx -no-mdebug
+Cause stabs-style debugging output to go into an ECOFF-style .mdebug
+section instead of the standard ELF .stabs sections.
@item -mgp32
@itemx -mfp32
Index: testsuite/gas/mips/lineno.d
===================================================================
RCS file: /cvs/src/src/gas/testsuite/gas/mips/lineno.d,v
retrieving revision 1.3
diff -u -p -r1.3 lineno.d
--- testsuite/gas/mips/lineno.d 29 Jun 2001 21:27:43 -0000 1.3
+++ testsuite/gas/mips/lineno.d 11 Jun 2002 21:14:25 -0000
@@ -1,6 +1,6 @@
#objdump: -d -l -mmips:4000
#name: assembly line numbers
-#as: -g -march=r4000
+#as: --gstabs -march=r4000
.*: +file format .*mips.*
Index: testsuite/gas/mips/mips.exp
===================================================================
RCS file: /cvs/src/src/gas/testsuite/gas/mips/mips.exp,v
retrieving revision 1.36
diff -u -p -r1.36 mips.exp
--- testsuite/gas/mips/mips.exp 31 May 2002 18:27:02 -0000 1.36
+++ testsuite/gas/mips/mips.exp 11 Jun 2002 21:14:25 -0000
@@ -145,8 +145,6 @@ if { [istarget mips*-*-*] } then {
run_dump_test "mips4650"
run_dump_test "mips4100"
run_dump_test "perfcount"
- # Linux uses ELF stabs, which doesn't support line number.
- setup_xfail "mips*-*-*linux*"
run_dump_test "lineno"
run_dump_test "sync"
run_dump_test "mips32"