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* [gcc(refs/users/marxin/heads/aix-restore-xcoff-dbg-format-v2)] Restore XCOFF for DWARF on AIX.
@ 2022-09-07 10:59 Martin Liska
0 siblings, 0 replies; 3+ messages in thread
From: Martin Liska @ 2022-09-07 10:59 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:36af87239723a29e6b11e7a7a9f82435549965f3
commit 36af87239723a29e6b11e7a7a9f82435549965f3
Author: Martin Liska <mliska@suse.cz>
Date: Wed Sep 7 11:47:40 2022 +0200
Restore XCOFF for DWARF on AIX.
gcc/ChangeLog:
* collect2.cc (scan_prog_file): Restore if XCOFF_DEBUGGING_INFO.
* config/rs6000/rs6000.cc (rs6000_option_override_internal):
Restore usage of XCOFF_DEBUGGING_INFO.
* config/rs6000/xcoff.h (XCOFF_DEBUGGING_INFO): Restore.
* dwarf2asm.cc (XCOFF_DEBUGGING_INFO): Restore support for
XCOFF_DEBUGGING_INFO.
(dw2_asm_output_nstring): Likewise.
(USE_LINKONCE_INDIRECT): Likewise.
* dwarf2out.cc (XCOFF_DEBUGGING_INFO): Likewise.
(HAVE_XCOFF_DWARF_EXTRAS): Likewise.
(output_fde): Likewise.
(output_call_frame_info): Likewise.
(have_macinfo): Likewise.
(add_AT_loc_list): Likewise.
(add_AT_view_list): Likewise.
(output_compilation_unit_header): Likewise.
(output_pubnames): Likewise.
(output_aranges): Likewise.
(output_line_info): Likewise.
(output_macinfo): Likewise.
(dwarf2out_finish): Likewise.
(dwarf2out_early_finish): Likewise.
Diff:
---
gcc/collect2.cc | 7 +++
gcc/config/rs6000/rs6000.cc | 6 +++
gcc/config/rs6000/xcoff.h | 3 ++
gcc/dwarf2asm.cc | 13 ++++--
gcc/dwarf2out.cc | 103 ++++++++++++++++++++++++++++++--------------
5 files changed, 97 insertions(+), 35 deletions(-)
diff --git a/gcc/collect2.cc b/gcc/collect2.cc
index 9715e8eee30..d81c7f28f16 100644
--- a/gcc/collect2.cc
+++ b/gcc/collect2.cc
@@ -2784,6 +2784,13 @@ scan_prog_file (const char *prog_name, scanpass which_pass,
if ((name = ldgetname (ldptr, &symbol)) == NULL)
continue; /* Should never happen. */
+#ifdef XCOFF_DEBUGGING_INFO
+ /* All AIX function names have a duplicate entry
+ beginning with a dot. */
+ if (*name == '.')
+ ++name;
+#endif
+
switch (is_ctor_dtor (name))
{
#if TARGET_AIX_VERSION
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 8b4edd281ca..7623d69a8c0 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -3821,6 +3821,12 @@ rs6000_option_override_internal (bool global_init_p)
if (TARGET_DEBUG_REG || TARGET_DEBUG_TARGET)
rs6000_print_isa_options (stderr, 0, "before defaults", rs6000_isa_flags);
+#ifdef XCOFF_DEBUGGING_INFO
+ /* For AIX default to 64-bit DWARF. */
+ if (!OPTION_SET_P (dwarf_offset_size))
+ dwarf_offset_size = POINTER_SIZE_UNITS;
+#endif
+
/* Handle explicit -mno-{altivec,vsx,power8-vector,power9-vector} and turn
off all of the options that depend on those flags. */
ignore_masks = rs6000_disable_incompatible_switches ();
diff --git a/gcc/config/rs6000/xcoff.h b/gcc/config/rs6000/xcoff.h
index bafc57df59a..cd0f99cb9c6 100644
--- a/gcc/config/rs6000/xcoff.h
+++ b/gcc/config/rs6000/xcoff.h
@@ -21,6 +21,9 @@
#define TARGET_OBJECT_FORMAT OBJECT_XCOFF
+/* The RS/6000 uses the XCOFF format. */
+#define XCOFF_DEBUGGING_INFO 1
+
/* Define if the object format being used is COFF or a superset. */
#define OBJECT_FORMAT_COFF
diff --git a/gcc/dwarf2asm.cc b/gcc/dwarf2asm.cc
index 7eac83f7b0f..274f574f25e 100644
--- a/gcc/dwarf2asm.cc
+++ b/gcc/dwarf2asm.cc
@@ -35,6 +35,10 @@ along with GCC; see the file COPYING3. If not see
#include "emit-rtl.h"
#include "fold-const.h"
+#ifndef XCOFF_DEBUGGING_INFO
+#define XCOFF_DEBUGGING_INFO 0
+#endif
+
\f
/* Output an unaligned integer with the given value and size. Prefer not
to print a newline, since the caller may want to add a comment. */
@@ -380,13 +384,16 @@ dw2_asm_output_nstring (const char *str, size_t orig_len,
if (flag_debug_asm && comment)
{
- fputs ("\t.ascii \"", asm_out_file);
+ if (XCOFF_DEBUGGING_INFO)
+ fputs ("\t.byte \"", asm_out_file);
+ else
+ fputs ("\t.ascii \"", asm_out_file);
for (i = 0; i < len; i++)
{
int c = str[i];
if (c == '\"')
- fputc ('\\', asm_out_file);
+ fputc (XCOFF_DEBUGGING_INFO ? '\"' : '\\', asm_out_file);
else if (c == '\\')
fputc ('\\', asm_out_file);
if (ISPRINT (c))
@@ -906,7 +913,7 @@ static GTY(()) hash_map<const char *, tree> *indirect_pool;
static GTY(()) int dw2_const_labelno;
#if defined(HAVE_GAS_HIDDEN)
-# define USE_LINKONCE_INDIRECT (SUPPORTS_ONE_ONLY)
+# define USE_LINKONCE_INDIRECT (SUPPORTS_ONE_ONLY && !XCOFF_DEBUGGING_INFO)
#else
# define USE_LINKONCE_INDIRECT 0
#endif
diff --git a/gcc/dwarf2out.cc b/gcc/dwarf2out.cc
index e4183607ff8..2df75904022 100644
--- a/gcc/dwarf2out.cc
+++ b/gcc/dwarf2out.cc
@@ -105,6 +105,14 @@ static rtx_insn *cached_next_real_insn;
static void dwarf2out_decl (tree);
static bool is_redundant_typedef (const_tree);
+#ifndef XCOFF_DEBUGGING_INFO
+#define XCOFF_DEBUGGING_INFO 0
+#endif
+
+#ifndef HAVE_XCOFF_DWARF_EXTRAS
+#define HAVE_XCOFF_DWARF_EXTRAS 0
+#endif
+
#ifdef VMS_DEBUGGING_INFO
int vms_file_stats_name (const char *, long long *, long *, char *, int *);
@@ -600,11 +608,14 @@ output_fde (dw_fde_ref fde, bool for_eh, bool second,
for_eh + j);
ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + j);
ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + j);
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4 && !for_eh)
- dw2_asm_output_data (4, 0xffffffff, "Initial length escape value"
- " indicating 64-bit DWARF extension");
- dw2_asm_output_delta (for_eh ? 4 : dwarf_offset_size, l2, l1,
- "FDE Length");
+ if (!XCOFF_DEBUGGING_INFO || for_eh)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4 && !for_eh)
+ dw2_asm_output_data (4, 0xffffffff, "Initial length escape value"
+ " indicating 64-bit DWARF extension");
+ dw2_asm_output_delta (for_eh ? 4 : dwarf_offset_size, l2, l1,
+ "FDE Length");
+ }
ASM_OUTPUT_LABEL (asm_out_file, l1);
if (for_eh)
@@ -801,11 +812,14 @@ output_call_frame_info (int for_eh)
/* Output the CIE. */
ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4 && !for_eh)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_delta (for_eh ? 4 : dwarf_offset_size, l2, l1,
- "Length of Common Information Entry");
+ if (!XCOFF_DEBUGGING_INFO || for_eh)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4 && !for_eh)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_delta (for_eh ? 4 : dwarf_offset_size, l2, l1,
+ "Length of Common Information Entry");
+ }
ASM_OUTPUT_LABEL (asm_out_file, l1);
/* Now that the CIE pointer is PC-relative for EH,
@@ -3665,7 +3679,8 @@ static GTY (()) vec<macinfo_entry, va_gc> *macinfo_table;
/* True if .debug_macinfo or .debug_macros section is going to be
emitted. */
#define have_macinfo \
- (debug_info_level >= DINFO_LEVEL_VERBOSE \
+ ((!XCOFF_DEBUGGING_INFO || HAVE_XCOFF_DWARF_EXTRAS) \
+ && debug_info_level >= DINFO_LEVEL_VERBOSE \
&& !macinfo_table->is_empty ())
/* Vector of dies for which we should generate .debug_ranges info. */
@@ -4967,6 +4982,9 @@ add_AT_loc_list (dw_die_ref die, enum dwarf_attribute attr_kind, dw_loc_list_ref
{
dw_attr_node attr;
+ if (XCOFF_DEBUGGING_INFO && !HAVE_XCOFF_DWARF_EXTRAS)
+ return;
+
attr.dw_attr = attr_kind;
attr.dw_attr_val.val_class = dw_val_class_loc_list;
attr.dw_attr_val.val_entry = NULL;
@@ -4990,6 +5008,9 @@ add_AT_view_list (dw_die_ref die, enum dwarf_attribute attr_kind)
{
dw_attr_node attr;
+ if (XCOFF_DEBUGGING_INFO && !HAVE_XCOFF_DWARF_EXTRAS)
+ return;
+
attr.dw_attr = attr_kind;
attr.dw_attr_val.val_class = dw_val_class_view_list;
attr.dw_attr_val.val_entry = NULL;
@@ -11145,12 +11166,15 @@ output_dwarf_version ()
static void
output_compilation_unit_header (enum dwarf_unit_type ut)
{
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_data (dwarf_offset_size,
- next_die_offset - DWARF_INITIAL_LENGTH_SIZE,
- "Length of Compilation Unit Info");
+ if (!XCOFF_DEBUGGING_INFO)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_data (dwarf_offset_size,
+ next_die_offset - DWARF_INITIAL_LENGTH_SIZE,
+ "Length of Compilation Unit Info");
+ }
output_dwarf_version ();
if (dwarf_version >= 5)
@@ -11659,11 +11683,14 @@ output_pubnames (vec<pubname_entry, va_gc> *names)
unsigned long pubnames_length = size_of_pubnames (names);
pubname_entry *pub;
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_data (dwarf_offset_size, pubnames_length,
- "Pub Info Length");
+ if (!XCOFF_DEBUGGING_INFO)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_data (dwarf_offset_size, pubnames_length,
+ "Pub Info Length");
+ }
/* Version number for pubnames/pubtypes is independent of dwarf version. */
dw2_asm_output_data (2, 2, "DWARF pubnames/pubtypes version");
@@ -11738,11 +11765,14 @@ output_aranges (void)
unsigned i;
unsigned long aranges_length = size_of_aranges ();
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_data (dwarf_offset_size, aranges_length,
- "Length of Address Ranges Info");
+ if (!XCOFF_DEBUGGING_INFO)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_data (dwarf_offset_size, aranges_length,
+ "Length of Address Ranges Info");
+ }
/* Version number for aranges is still 2, even up to DWARF5. */
dw2_asm_output_data (2, 2, "DWARF aranges version");
@@ -13036,11 +13066,14 @@ output_line_info (bool prologue_only)
ASM_GENERATE_INTERNAL_LABEL (p2, LN_PROLOG_END_LABEL,
output_line_info_generation++);
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_delta (dwarf_offset_size, l2, l1,
- "Length of Source Line Info");
+ if (!XCOFF_DEBUGGING_INFO)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_delta (dwarf_offset_size, l2, l1,
+ "Length of Source Line Info");
+ }
ASM_OUTPUT_LABEL (asm_out_file, l1);
@@ -29111,6 +29144,8 @@ output_macinfo (const char *debug_line_label, bool early_lto_debug)
/* AIX Assembler inserts the length, so adjust the reference to match the
offset expected by debuggers. */
strcpy (dl_section_ref, debug_line_label);
+ if (XCOFF_DEBUGGING_INFO)
+ strcat (dl_section_ref, DWARF_INITIAL_LENGTH_SIZE_STR);
/* For .debug_macro emit the section header. */
if (!dwarf_strict || dwarf_version >= 5)
@@ -32315,6 +32350,8 @@ dwarf2out_finish (const char *filename)
/* AIX Assembler inserts the length, so adjust the reference to match the
offset expected by debuggers. */
strcpy (dl_section_ref, debug_line_section_label);
+ if (XCOFF_DEBUGGING_INFO)
+ strcat (dl_section_ref, DWARF_INITIAL_LENGTH_SIZE_STR);
if (debug_info_level >= DINFO_LEVEL_TERSE)
add_AT_lineptr (main_comp_unit_die, DW_AT_stmt_list,
@@ -33030,6 +33067,8 @@ dwarf2out_early_finish (const char *filename)
/* AIX Assembler inserts the length, so adjust the reference to match the
offset expected by debuggers. */
strcpy (dl_section_ref, debug_line_section_label);
+ if (XCOFF_DEBUGGING_INFO)
+ strcat (dl_section_ref, DWARF_INITIAL_LENGTH_SIZE_STR);
if (debug_info_level >= DINFO_LEVEL_TERSE)
add_AT_lineptr (comp_unit_die (), DW_AT_stmt_list, dl_section_ref);
^ permalink raw reply [flat|nested] 3+ messages in thread
* [gcc(refs/users/marxin/heads/aix-restore-xcoff-dbg-format-v2)] Restore XCOFF for DWARF on AIX.
@ 2022-09-07 11:42 Martin Liska
0 siblings, 0 replies; 3+ messages in thread
From: Martin Liska @ 2022-09-07 11:42 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:b96f2651c5836e0e5d1e0a84f0de179f0f3b4f24
commit b96f2651c5836e0e5d1e0a84f0de179f0f3b4f24
Author: Martin Liska <mliska@suse.cz>
Date: Wed Sep 7 11:47:40 2022 +0200
Restore XCOFF for DWARF on AIX.
PR bootstrap/106855
gcc/ChangeLog:
* collect2.cc (scan_prog_file): Restore if XCOFF_DEBUGGING_INFO.
* config/rs6000/rs6000.cc (rs6000_option_override_internal):
Restore usage of XCOFF_DEBUGGING_INFO.
* config/rs6000/xcoff.h (XCOFF_DEBUGGING_INFO): Restore.
* dwarf2asm.cc (XCOFF_DEBUGGING_INFO): Restore support for
XCOFF_DEBUGGING_INFO.
(dw2_asm_output_nstring): Likewise.
(USE_LINKONCE_INDIRECT): Likewise.
* dwarf2out.cc (XCOFF_DEBUGGING_INFO): Likewise.
(HAVE_XCOFF_DWARF_EXTRAS): Likewise.
(output_fde): Likewise.
(output_call_frame_info): Likewise.
(have_macinfo): Likewise.
(add_AT_loc_list): Likewise.
(add_AT_view_list): Likewise.
(output_compilation_unit_header): Likewise.
(output_pubnames): Likewise.
(output_aranges): Likewise.
(output_line_info): Likewise.
(output_macinfo): Likewise.
(dwarf2out_finish): Likewise.
(dwarf2out_early_finish): Likewise.
Diff:
---
gcc/collect2.cc | 7 +++
gcc/config/rs6000/rs6000.cc | 6 +++
gcc/config/rs6000/xcoff.h | 3 ++
gcc/dwarf2asm.cc | 13 ++++--
gcc/dwarf2out.cc | 103 ++++++++++++++++++++++++++++++--------------
5 files changed, 97 insertions(+), 35 deletions(-)
diff --git a/gcc/collect2.cc b/gcc/collect2.cc
index 9715e8eee30..d81c7f28f16 100644
--- a/gcc/collect2.cc
+++ b/gcc/collect2.cc
@@ -2784,6 +2784,13 @@ scan_prog_file (const char *prog_name, scanpass which_pass,
if ((name = ldgetname (ldptr, &symbol)) == NULL)
continue; /* Should never happen. */
+#ifdef XCOFF_DEBUGGING_INFO
+ /* All AIX function names have a duplicate entry
+ beginning with a dot. */
+ if (*name == '.')
+ ++name;
+#endif
+
switch (is_ctor_dtor (name))
{
#if TARGET_AIX_VERSION
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 8b4edd281ca..7623d69a8c0 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -3821,6 +3821,12 @@ rs6000_option_override_internal (bool global_init_p)
if (TARGET_DEBUG_REG || TARGET_DEBUG_TARGET)
rs6000_print_isa_options (stderr, 0, "before defaults", rs6000_isa_flags);
+#ifdef XCOFF_DEBUGGING_INFO
+ /* For AIX default to 64-bit DWARF. */
+ if (!OPTION_SET_P (dwarf_offset_size))
+ dwarf_offset_size = POINTER_SIZE_UNITS;
+#endif
+
/* Handle explicit -mno-{altivec,vsx,power8-vector,power9-vector} and turn
off all of the options that depend on those flags. */
ignore_masks = rs6000_disable_incompatible_switches ();
diff --git a/gcc/config/rs6000/xcoff.h b/gcc/config/rs6000/xcoff.h
index bafc57df59a..cd0f99cb9c6 100644
--- a/gcc/config/rs6000/xcoff.h
+++ b/gcc/config/rs6000/xcoff.h
@@ -21,6 +21,9 @@
#define TARGET_OBJECT_FORMAT OBJECT_XCOFF
+/* The RS/6000 uses the XCOFF format. */
+#define XCOFF_DEBUGGING_INFO 1
+
/* Define if the object format being used is COFF or a superset. */
#define OBJECT_FORMAT_COFF
diff --git a/gcc/dwarf2asm.cc b/gcc/dwarf2asm.cc
index 7eac83f7b0f..274f574f25e 100644
--- a/gcc/dwarf2asm.cc
+++ b/gcc/dwarf2asm.cc
@@ -35,6 +35,10 @@ along with GCC; see the file COPYING3. If not see
#include "emit-rtl.h"
#include "fold-const.h"
+#ifndef XCOFF_DEBUGGING_INFO
+#define XCOFF_DEBUGGING_INFO 0
+#endif
+
\f
/* Output an unaligned integer with the given value and size. Prefer not
to print a newline, since the caller may want to add a comment. */
@@ -380,13 +384,16 @@ dw2_asm_output_nstring (const char *str, size_t orig_len,
if (flag_debug_asm && comment)
{
- fputs ("\t.ascii \"", asm_out_file);
+ if (XCOFF_DEBUGGING_INFO)
+ fputs ("\t.byte \"", asm_out_file);
+ else
+ fputs ("\t.ascii \"", asm_out_file);
for (i = 0; i < len; i++)
{
int c = str[i];
if (c == '\"')
- fputc ('\\', asm_out_file);
+ fputc (XCOFF_DEBUGGING_INFO ? '\"' : '\\', asm_out_file);
else if (c == '\\')
fputc ('\\', asm_out_file);
if (ISPRINT (c))
@@ -906,7 +913,7 @@ static GTY(()) hash_map<const char *, tree> *indirect_pool;
static GTY(()) int dw2_const_labelno;
#if defined(HAVE_GAS_HIDDEN)
-# define USE_LINKONCE_INDIRECT (SUPPORTS_ONE_ONLY)
+# define USE_LINKONCE_INDIRECT (SUPPORTS_ONE_ONLY && !XCOFF_DEBUGGING_INFO)
#else
# define USE_LINKONCE_INDIRECT 0
#endif
diff --git a/gcc/dwarf2out.cc b/gcc/dwarf2out.cc
index e4183607ff8..2df75904022 100644
--- a/gcc/dwarf2out.cc
+++ b/gcc/dwarf2out.cc
@@ -105,6 +105,14 @@ static rtx_insn *cached_next_real_insn;
static void dwarf2out_decl (tree);
static bool is_redundant_typedef (const_tree);
+#ifndef XCOFF_DEBUGGING_INFO
+#define XCOFF_DEBUGGING_INFO 0
+#endif
+
+#ifndef HAVE_XCOFF_DWARF_EXTRAS
+#define HAVE_XCOFF_DWARF_EXTRAS 0
+#endif
+
#ifdef VMS_DEBUGGING_INFO
int vms_file_stats_name (const char *, long long *, long *, char *, int *);
@@ -600,11 +608,14 @@ output_fde (dw_fde_ref fde, bool for_eh, bool second,
for_eh + j);
ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + j);
ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + j);
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4 && !for_eh)
- dw2_asm_output_data (4, 0xffffffff, "Initial length escape value"
- " indicating 64-bit DWARF extension");
- dw2_asm_output_delta (for_eh ? 4 : dwarf_offset_size, l2, l1,
- "FDE Length");
+ if (!XCOFF_DEBUGGING_INFO || for_eh)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4 && !for_eh)
+ dw2_asm_output_data (4, 0xffffffff, "Initial length escape value"
+ " indicating 64-bit DWARF extension");
+ dw2_asm_output_delta (for_eh ? 4 : dwarf_offset_size, l2, l1,
+ "FDE Length");
+ }
ASM_OUTPUT_LABEL (asm_out_file, l1);
if (for_eh)
@@ -801,11 +812,14 @@ output_call_frame_info (int for_eh)
/* Output the CIE. */
ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4 && !for_eh)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_delta (for_eh ? 4 : dwarf_offset_size, l2, l1,
- "Length of Common Information Entry");
+ if (!XCOFF_DEBUGGING_INFO || for_eh)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4 && !for_eh)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_delta (for_eh ? 4 : dwarf_offset_size, l2, l1,
+ "Length of Common Information Entry");
+ }
ASM_OUTPUT_LABEL (asm_out_file, l1);
/* Now that the CIE pointer is PC-relative for EH,
@@ -3665,7 +3679,8 @@ static GTY (()) vec<macinfo_entry, va_gc> *macinfo_table;
/* True if .debug_macinfo or .debug_macros section is going to be
emitted. */
#define have_macinfo \
- (debug_info_level >= DINFO_LEVEL_VERBOSE \
+ ((!XCOFF_DEBUGGING_INFO || HAVE_XCOFF_DWARF_EXTRAS) \
+ && debug_info_level >= DINFO_LEVEL_VERBOSE \
&& !macinfo_table->is_empty ())
/* Vector of dies for which we should generate .debug_ranges info. */
@@ -4967,6 +4982,9 @@ add_AT_loc_list (dw_die_ref die, enum dwarf_attribute attr_kind, dw_loc_list_ref
{
dw_attr_node attr;
+ if (XCOFF_DEBUGGING_INFO && !HAVE_XCOFF_DWARF_EXTRAS)
+ return;
+
attr.dw_attr = attr_kind;
attr.dw_attr_val.val_class = dw_val_class_loc_list;
attr.dw_attr_val.val_entry = NULL;
@@ -4990,6 +5008,9 @@ add_AT_view_list (dw_die_ref die, enum dwarf_attribute attr_kind)
{
dw_attr_node attr;
+ if (XCOFF_DEBUGGING_INFO && !HAVE_XCOFF_DWARF_EXTRAS)
+ return;
+
attr.dw_attr = attr_kind;
attr.dw_attr_val.val_class = dw_val_class_view_list;
attr.dw_attr_val.val_entry = NULL;
@@ -11145,12 +11166,15 @@ output_dwarf_version ()
static void
output_compilation_unit_header (enum dwarf_unit_type ut)
{
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_data (dwarf_offset_size,
- next_die_offset - DWARF_INITIAL_LENGTH_SIZE,
- "Length of Compilation Unit Info");
+ if (!XCOFF_DEBUGGING_INFO)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_data (dwarf_offset_size,
+ next_die_offset - DWARF_INITIAL_LENGTH_SIZE,
+ "Length of Compilation Unit Info");
+ }
output_dwarf_version ();
if (dwarf_version >= 5)
@@ -11659,11 +11683,14 @@ output_pubnames (vec<pubname_entry, va_gc> *names)
unsigned long pubnames_length = size_of_pubnames (names);
pubname_entry *pub;
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_data (dwarf_offset_size, pubnames_length,
- "Pub Info Length");
+ if (!XCOFF_DEBUGGING_INFO)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_data (dwarf_offset_size, pubnames_length,
+ "Pub Info Length");
+ }
/* Version number for pubnames/pubtypes is independent of dwarf version. */
dw2_asm_output_data (2, 2, "DWARF pubnames/pubtypes version");
@@ -11738,11 +11765,14 @@ output_aranges (void)
unsigned i;
unsigned long aranges_length = size_of_aranges ();
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_data (dwarf_offset_size, aranges_length,
- "Length of Address Ranges Info");
+ if (!XCOFF_DEBUGGING_INFO)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_data (dwarf_offset_size, aranges_length,
+ "Length of Address Ranges Info");
+ }
/* Version number for aranges is still 2, even up to DWARF5. */
dw2_asm_output_data (2, 2, "DWARF aranges version");
@@ -13036,11 +13066,14 @@ output_line_info (bool prologue_only)
ASM_GENERATE_INTERNAL_LABEL (p2, LN_PROLOG_END_LABEL,
output_line_info_generation++);
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_delta (dwarf_offset_size, l2, l1,
- "Length of Source Line Info");
+ if (!XCOFF_DEBUGGING_INFO)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_delta (dwarf_offset_size, l2, l1,
+ "Length of Source Line Info");
+ }
ASM_OUTPUT_LABEL (asm_out_file, l1);
@@ -29111,6 +29144,8 @@ output_macinfo (const char *debug_line_label, bool early_lto_debug)
/* AIX Assembler inserts the length, so adjust the reference to match the
offset expected by debuggers. */
strcpy (dl_section_ref, debug_line_label);
+ if (XCOFF_DEBUGGING_INFO)
+ strcat (dl_section_ref, DWARF_INITIAL_LENGTH_SIZE_STR);
/* For .debug_macro emit the section header. */
if (!dwarf_strict || dwarf_version >= 5)
@@ -32315,6 +32350,8 @@ dwarf2out_finish (const char *filename)
/* AIX Assembler inserts the length, so adjust the reference to match the
offset expected by debuggers. */
strcpy (dl_section_ref, debug_line_section_label);
+ if (XCOFF_DEBUGGING_INFO)
+ strcat (dl_section_ref, DWARF_INITIAL_LENGTH_SIZE_STR);
if (debug_info_level >= DINFO_LEVEL_TERSE)
add_AT_lineptr (main_comp_unit_die, DW_AT_stmt_list,
@@ -33030,6 +33067,8 @@ dwarf2out_early_finish (const char *filename)
/* AIX Assembler inserts the length, so adjust the reference to match the
offset expected by debuggers. */
strcpy (dl_section_ref, debug_line_section_label);
+ if (XCOFF_DEBUGGING_INFO)
+ strcat (dl_section_ref, DWARF_INITIAL_LENGTH_SIZE_STR);
if (debug_info_level >= DINFO_LEVEL_TERSE)
add_AT_lineptr (comp_unit_die (), DW_AT_stmt_list, dl_section_ref);
^ permalink raw reply [flat|nested] 3+ messages in thread
* [gcc(refs/users/marxin/heads/aix-restore-xcoff-dbg-format-v2)] Restore XCOFF for DWARF on AIX.
@ 2022-09-07 9:51 Martin Liska
0 siblings, 0 replies; 3+ messages in thread
From: Martin Liska @ 2022-09-07 9:51 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:50f15dbf969579e235db072e863b1c2443fa00cf
commit 50f15dbf969579e235db072e863b1c2443fa00cf
Author: Martin Liska <mliska@suse.cz>
Date: Wed Sep 7 11:47:40 2022 +0200
Restore XCOFF for DWARF on AIX.
Diff:
---
gcc/collect2.cc | 7 +++
gcc/config/rs6000/rs6000.cc | 6 +++
gcc/config/rs6000/xcoff.h | 3 ++
gcc/dwarf2asm.cc | 13 ++++--
gcc/dwarf2out.cc | 103 ++++++++++++++++++++++++++++++--------------
5 files changed, 97 insertions(+), 35 deletions(-)
diff --git a/gcc/collect2.cc b/gcc/collect2.cc
index 9715e8eee30..d81c7f28f16 100644
--- a/gcc/collect2.cc
+++ b/gcc/collect2.cc
@@ -2784,6 +2784,13 @@ scan_prog_file (const char *prog_name, scanpass which_pass,
if ((name = ldgetname (ldptr, &symbol)) == NULL)
continue; /* Should never happen. */
+#ifdef XCOFF_DEBUGGING_INFO
+ /* All AIX function names have a duplicate entry
+ beginning with a dot. */
+ if (*name == '.')
+ ++name;
+#endif
+
switch (is_ctor_dtor (name))
{
#if TARGET_AIX_VERSION
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 8b4edd281ca..7623d69a8c0 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -3821,6 +3821,12 @@ rs6000_option_override_internal (bool global_init_p)
if (TARGET_DEBUG_REG || TARGET_DEBUG_TARGET)
rs6000_print_isa_options (stderr, 0, "before defaults", rs6000_isa_flags);
+#ifdef XCOFF_DEBUGGING_INFO
+ /* For AIX default to 64-bit DWARF. */
+ if (!OPTION_SET_P (dwarf_offset_size))
+ dwarf_offset_size = POINTER_SIZE_UNITS;
+#endif
+
/* Handle explicit -mno-{altivec,vsx,power8-vector,power9-vector} and turn
off all of the options that depend on those flags. */
ignore_masks = rs6000_disable_incompatible_switches ();
diff --git a/gcc/config/rs6000/xcoff.h b/gcc/config/rs6000/xcoff.h
index bafc57df59a..cd0f99cb9c6 100644
--- a/gcc/config/rs6000/xcoff.h
+++ b/gcc/config/rs6000/xcoff.h
@@ -21,6 +21,9 @@
#define TARGET_OBJECT_FORMAT OBJECT_XCOFF
+/* The RS/6000 uses the XCOFF format. */
+#define XCOFF_DEBUGGING_INFO 1
+
/* Define if the object format being used is COFF or a superset. */
#define OBJECT_FORMAT_COFF
diff --git a/gcc/dwarf2asm.cc b/gcc/dwarf2asm.cc
index 7eac83f7b0f..274f574f25e 100644
--- a/gcc/dwarf2asm.cc
+++ b/gcc/dwarf2asm.cc
@@ -35,6 +35,10 @@ along with GCC; see the file COPYING3. If not see
#include "emit-rtl.h"
#include "fold-const.h"
+#ifndef XCOFF_DEBUGGING_INFO
+#define XCOFF_DEBUGGING_INFO 0
+#endif
+
\f
/* Output an unaligned integer with the given value and size. Prefer not
to print a newline, since the caller may want to add a comment. */
@@ -380,13 +384,16 @@ dw2_asm_output_nstring (const char *str, size_t orig_len,
if (flag_debug_asm && comment)
{
- fputs ("\t.ascii \"", asm_out_file);
+ if (XCOFF_DEBUGGING_INFO)
+ fputs ("\t.byte \"", asm_out_file);
+ else
+ fputs ("\t.ascii \"", asm_out_file);
for (i = 0; i < len; i++)
{
int c = str[i];
if (c == '\"')
- fputc ('\\', asm_out_file);
+ fputc (XCOFF_DEBUGGING_INFO ? '\"' : '\\', asm_out_file);
else if (c == '\\')
fputc ('\\', asm_out_file);
if (ISPRINT (c))
@@ -906,7 +913,7 @@ static GTY(()) hash_map<const char *, tree> *indirect_pool;
static GTY(()) int dw2_const_labelno;
#if defined(HAVE_GAS_HIDDEN)
-# define USE_LINKONCE_INDIRECT (SUPPORTS_ONE_ONLY)
+# define USE_LINKONCE_INDIRECT (SUPPORTS_ONE_ONLY && !XCOFF_DEBUGGING_INFO)
#else
# define USE_LINKONCE_INDIRECT 0
#endif
diff --git a/gcc/dwarf2out.cc b/gcc/dwarf2out.cc
index e4183607ff8..2df75904022 100644
--- a/gcc/dwarf2out.cc
+++ b/gcc/dwarf2out.cc
@@ -105,6 +105,14 @@ static rtx_insn *cached_next_real_insn;
static void dwarf2out_decl (tree);
static bool is_redundant_typedef (const_tree);
+#ifndef XCOFF_DEBUGGING_INFO
+#define XCOFF_DEBUGGING_INFO 0
+#endif
+
+#ifndef HAVE_XCOFF_DWARF_EXTRAS
+#define HAVE_XCOFF_DWARF_EXTRAS 0
+#endif
+
#ifdef VMS_DEBUGGING_INFO
int vms_file_stats_name (const char *, long long *, long *, char *, int *);
@@ -600,11 +608,14 @@ output_fde (dw_fde_ref fde, bool for_eh, bool second,
for_eh + j);
ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + j);
ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + j);
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4 && !for_eh)
- dw2_asm_output_data (4, 0xffffffff, "Initial length escape value"
- " indicating 64-bit DWARF extension");
- dw2_asm_output_delta (for_eh ? 4 : dwarf_offset_size, l2, l1,
- "FDE Length");
+ if (!XCOFF_DEBUGGING_INFO || for_eh)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4 && !for_eh)
+ dw2_asm_output_data (4, 0xffffffff, "Initial length escape value"
+ " indicating 64-bit DWARF extension");
+ dw2_asm_output_delta (for_eh ? 4 : dwarf_offset_size, l2, l1,
+ "FDE Length");
+ }
ASM_OUTPUT_LABEL (asm_out_file, l1);
if (for_eh)
@@ -801,11 +812,14 @@ output_call_frame_info (int for_eh)
/* Output the CIE. */
ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4 && !for_eh)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_delta (for_eh ? 4 : dwarf_offset_size, l2, l1,
- "Length of Common Information Entry");
+ if (!XCOFF_DEBUGGING_INFO || for_eh)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4 && !for_eh)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_delta (for_eh ? 4 : dwarf_offset_size, l2, l1,
+ "Length of Common Information Entry");
+ }
ASM_OUTPUT_LABEL (asm_out_file, l1);
/* Now that the CIE pointer is PC-relative for EH,
@@ -3665,7 +3679,8 @@ static GTY (()) vec<macinfo_entry, va_gc> *macinfo_table;
/* True if .debug_macinfo or .debug_macros section is going to be
emitted. */
#define have_macinfo \
- (debug_info_level >= DINFO_LEVEL_VERBOSE \
+ ((!XCOFF_DEBUGGING_INFO || HAVE_XCOFF_DWARF_EXTRAS) \
+ && debug_info_level >= DINFO_LEVEL_VERBOSE \
&& !macinfo_table->is_empty ())
/* Vector of dies for which we should generate .debug_ranges info. */
@@ -4967,6 +4982,9 @@ add_AT_loc_list (dw_die_ref die, enum dwarf_attribute attr_kind, dw_loc_list_ref
{
dw_attr_node attr;
+ if (XCOFF_DEBUGGING_INFO && !HAVE_XCOFF_DWARF_EXTRAS)
+ return;
+
attr.dw_attr = attr_kind;
attr.dw_attr_val.val_class = dw_val_class_loc_list;
attr.dw_attr_val.val_entry = NULL;
@@ -4990,6 +5008,9 @@ add_AT_view_list (dw_die_ref die, enum dwarf_attribute attr_kind)
{
dw_attr_node attr;
+ if (XCOFF_DEBUGGING_INFO && !HAVE_XCOFF_DWARF_EXTRAS)
+ return;
+
attr.dw_attr = attr_kind;
attr.dw_attr_val.val_class = dw_val_class_view_list;
attr.dw_attr_val.val_entry = NULL;
@@ -11145,12 +11166,15 @@ output_dwarf_version ()
static void
output_compilation_unit_header (enum dwarf_unit_type ut)
{
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_data (dwarf_offset_size,
- next_die_offset - DWARF_INITIAL_LENGTH_SIZE,
- "Length of Compilation Unit Info");
+ if (!XCOFF_DEBUGGING_INFO)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_data (dwarf_offset_size,
+ next_die_offset - DWARF_INITIAL_LENGTH_SIZE,
+ "Length of Compilation Unit Info");
+ }
output_dwarf_version ();
if (dwarf_version >= 5)
@@ -11659,11 +11683,14 @@ output_pubnames (vec<pubname_entry, va_gc> *names)
unsigned long pubnames_length = size_of_pubnames (names);
pubname_entry *pub;
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_data (dwarf_offset_size, pubnames_length,
- "Pub Info Length");
+ if (!XCOFF_DEBUGGING_INFO)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_data (dwarf_offset_size, pubnames_length,
+ "Pub Info Length");
+ }
/* Version number for pubnames/pubtypes is independent of dwarf version. */
dw2_asm_output_data (2, 2, "DWARF pubnames/pubtypes version");
@@ -11738,11 +11765,14 @@ output_aranges (void)
unsigned i;
unsigned long aranges_length = size_of_aranges ();
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_data (dwarf_offset_size, aranges_length,
- "Length of Address Ranges Info");
+ if (!XCOFF_DEBUGGING_INFO)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_data (dwarf_offset_size, aranges_length,
+ "Length of Address Ranges Info");
+ }
/* Version number for aranges is still 2, even up to DWARF5. */
dw2_asm_output_data (2, 2, "DWARF aranges version");
@@ -13036,11 +13066,14 @@ output_line_info (bool prologue_only)
ASM_GENERATE_INTERNAL_LABEL (p2, LN_PROLOG_END_LABEL,
output_line_info_generation++);
- if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
- dw2_asm_output_data (4, 0xffffffff,
- "Initial length escape value indicating 64-bit DWARF extension");
- dw2_asm_output_delta (dwarf_offset_size, l2, l1,
- "Length of Source Line Info");
+ if (!XCOFF_DEBUGGING_INFO)
+ {
+ if (DWARF_INITIAL_LENGTH_SIZE - dwarf_offset_size == 4)
+ dw2_asm_output_data (4, 0xffffffff,
+ "Initial length escape value indicating 64-bit DWARF extension");
+ dw2_asm_output_delta (dwarf_offset_size, l2, l1,
+ "Length of Source Line Info");
+ }
ASM_OUTPUT_LABEL (asm_out_file, l1);
@@ -29111,6 +29144,8 @@ output_macinfo (const char *debug_line_label, bool early_lto_debug)
/* AIX Assembler inserts the length, so adjust the reference to match the
offset expected by debuggers. */
strcpy (dl_section_ref, debug_line_label);
+ if (XCOFF_DEBUGGING_INFO)
+ strcat (dl_section_ref, DWARF_INITIAL_LENGTH_SIZE_STR);
/* For .debug_macro emit the section header. */
if (!dwarf_strict || dwarf_version >= 5)
@@ -32315,6 +32350,8 @@ dwarf2out_finish (const char *filename)
/* AIX Assembler inserts the length, so adjust the reference to match the
offset expected by debuggers. */
strcpy (dl_section_ref, debug_line_section_label);
+ if (XCOFF_DEBUGGING_INFO)
+ strcat (dl_section_ref, DWARF_INITIAL_LENGTH_SIZE_STR);
if (debug_info_level >= DINFO_LEVEL_TERSE)
add_AT_lineptr (main_comp_unit_die, DW_AT_stmt_list,
@@ -33030,6 +33067,8 @@ dwarf2out_early_finish (const char *filename)
/* AIX Assembler inserts the length, so adjust the reference to match the
offset expected by debuggers. */
strcpy (dl_section_ref, debug_line_section_label);
+ if (XCOFF_DEBUGGING_INFO)
+ strcat (dl_section_ref, DWARF_INITIAL_LENGTH_SIZE_STR);
if (debug_info_level >= DINFO_LEVEL_TERSE)
add_AT_lineptr (comp_unit_die (), DW_AT_stmt_list, dl_section_ref);
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-09-07 11:42 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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