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* paread.c (compare_unwind_entries): Delete function. It's been 

moved into hppa-tdep.c.
        (read_unwind_info): Likewise.
        (pa_symfile_read): No longer call read_unwind_info.  The unwind
        tables will be read in as they are needed.

        * hppa-tdep.c (compare_unwind_entries): New function.
        (read_unwind_info, internalize_unwinds): Likewise.
        (find_unwind_entry): Read in unwind information on demand.
This commit is contained in:
Jeff Law 1994-04-17 05:22:39 +00:00
parent 8c546dedc3
commit c5152d4234
3 changed files with 217 additions and 177 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
gdb/ChangeLog
View File

@ -1,3 +1,15 @@
Sat Apr 16 22:20:51 1994 Jeffrey A. Law (law@snake.cs.utah.edu)
* paread.c (compare_unwind_entries): Delete function. It's been
moved into hppa-tdep.c.
(read_unwind_info): Likewise.
(pa_symfile_read): No longer call read_unwind_info. The unwind
tables will be read in as they are needed.
* hppa-tdep.c (compare_unwind_entries): New function.
(read_unwind_info, internalize_unwinds): Likewise.
(find_unwind_entry): Read in unwind information on demand.
Fri Apr 15 11:53:46 1994 Stan Shebs (shebs@andros.cygnus.com)
* source.c (DIRNAME_SEPARATOR): New macro, replaces all references

206
gdb/hppa-tdep.c
View File

@ -68,6 +68,13 @@ static int inst_saves_gr PARAMS ((unsigned long));
static int inst_saves_fr PARAMS ((unsigned long));
static int pc_in_interrupt_handler PARAMS ((CORE_ADDR));
static int pc_in_linker_stub PARAMS ((CORE_ADDR));
static int compare_unwind_entries PARAMS ((struct unwind_table_entry *,
struct unwind_table_entry *));
static void read_unwind_info PARAMS ((struct objfile *));
static void internalize_unwinds PARAMS ((struct objfile *,
struct unwind_table_entry *,
asection *, unsigned int,
unsigned int, unsigned int *));
/* Routines to extract various sized constants out of hppa
@ -248,6 +255,200 @@ extract_17 (word)
(word & 0x1) << 16, 17) << 2;
}
/* Compare the start address for two unwind entries returning 1 if
the first address is larger than the second, -1 if the second is
larger than the first, and zero if they are equal. */
static int
compare_unwind_entries (a, b)
struct unwind_table_entry *a;
struct unwind_table_entry *b;
{
if (a->region_start > b->region_start)
return 1;
else if (a->region_start < b->region_start)
return -1;
else
return 0;
}
static void
internalize_unwinds (objfile, table, section, entries, size, indexp)
struct objfile *objfile;
struct unwind_table_entry *table;
asection *section;
unsigned int entries, size;
unsigned int *indexp;
{
/* We will read the unwind entries into temporary memory, then
fill in the actual unwind table. */
if (size > 0)
{
unsigned long tmp;
unsigned i;
char *buf = alloca (size);
bfd_get_section_contents (objfile->obfd, section, buf, 0, size);
/* Now internalize the information being careful to handle host/target
endian issues. */
for (i = 0; i < entries; i++)
{
table[i].region_start = bfd_get_32 (objfile->obfd,
(bfd_byte *)buf);
buf += 4;
table[i].region_end = bfd_get_32 (objfile->obfd, (bfd_byte *)buf);
buf += 4;
tmp = bfd_get_32 (objfile->obfd, (bfd_byte *)buf);
buf += 4;
table[i].Cannot_unwind = (tmp >> 31) & 0x1;;
table[i].Millicode = (tmp >> 30) & 0x1;
table[i].Millicode_save_sr0 = (tmp >> 29) & 0x1;
table[i].Region_description = (tmp >> 27) & 0x3;
table[i].reserved1 = (tmp >> 26) & 0x1;
table[i].Entry_SR = (tmp >> 25) & 0x1;
table[i].Entry_FR = (tmp >> 21) & 0xf;
table[i].Entry_GR = (tmp >> 16) & 0x1f;
table[i].Args_stored = (tmp >> 15) & 0x1;
table[i].Variable_Frame = (tmp >> 14) & 0x1;
table[i].Separate_Package_Body = (tmp >> 13) & 0x1;
table[i].Frame_Extension_Millicode = (tmp >> 12 ) & 0x1;
table[i].Stack_Overflow_Check = (tmp >> 11) & 0x1;
table[i].Two_Instruction_SP_Increment = (tmp >> 10) & 0x1;
table[i].Ada_Region = (tmp >> 9) & 0x1;
table[i].reserved2 = (tmp >> 5) & 0xf;
table[i].Save_SP = (tmp >> 4) & 0x1;
table[i].Save_RP = (tmp >> 3) & 0x1;
table[i].Save_MRP_in_frame = (tmp >> 2) & 0x1;
table[i].extn_ptr_defined = (tmp >> 1) & 0x1;
table[i].Cleanup_defined = tmp & 0x1;
tmp = bfd_get_32 (objfile->obfd, (bfd_byte *)buf);
buf += 4;
table[i].MPE_XL_interrupt_marker = (tmp >> 31) & 0x1;
table[i].HP_UX_interrupt_marker = (tmp >> 30) & 0x1;
table[i].Large_frame = (tmp >> 29) & 0x1;
table[i].reserved4 = (tmp >> 27) & 0x3;
table[i].Total_frame_size = tmp & 0x7ffffff;
}
}
}
/* Read in the backtrace information stored in the `$UNWIND_START$' section of
the object file. This info is used mainly by find_unwind_entry() to find
out the stack frame size and frame pointer used by procedures. We put
everything on the psymbol obstack in the objfile so that it automatically
gets freed when the objfile is destroyed. */
void
read_unwind_info (objfile)
struct objfile *objfile;
{
asection *unwind_sec, *elf_unwind_sec, *stub_unwind_sec;
unsigned unwind_size, elf_unwind_size, stub_unwind_size, total_size;
unsigned index, unwind_entries, elf_unwind_entries;
unsigned stub_entries, total_entries;
struct obj_unwind_info *ui;
ui = obstack_alloc (&objfile->psymbol_obstack,
sizeof (struct obj_unwind_info));
ui->table = NULL;
ui->cache = NULL;
ui->last = -1;
/* Get hooks to all unwind sections. Note there is no linker-stub unwind
section in ELF at the moment. */
unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_START$");
elf_unwind_sec = bfd_get_section_by_name (objfile->obfd, ".hppa_unwind");
stub_unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_END$");
/* Get sizes and unwind counts for all sections. */
if (unwind_sec)
{
unwind_size = bfd_section_size (objfile->obfd, unwind_sec);
unwind_entries = unwind_size / UNWIND_ENTRY_SIZE;
}
else
{
unwind_size = 0;
unwind_entries = 0;
}
if (elf_unwind_sec)
{
elf_unwind_size = bfd_section_size (objfile->obfd, elf_unwind_sec);
elf_unwind_entries = elf_unwind_size / UNWIND_ENTRY_SIZE;
}
if (stub_unwind_sec)
{
stub_unwind_size = bfd_section_size (objfile->obfd, stub_unwind_sec);
stub_entries = stub_unwind_size / STUB_UNWIND_ENTRY_SIZE;
}
else
{
stub_unwind_size = 0;
stub_entries = 0;
}
/* Compute total number of unwind entries and their total size. */
total_entries = unwind_entries + elf_unwind_entries + stub_entries;
total_size = total_entries * sizeof (struct unwind_table_entry);
/* Allocate memory for the unwind table. */
ui->table = obstack_alloc (&objfile->psymbol_obstack, total_size);
ui->last = total_entries - 1;
/* Internalize the standard unwind entries. */
index = 0;
internalize_unwinds (objfile, &ui->table[index], unwind_sec,
unwind_entries, unwind_size);
index += unwind_entries;
internalize_unwinds (objfile, &ui->table[index], elf_unwind_sec,
elf_unwind_entries, elf_unwind_size);
index += elf_unwind_entries;
/* Now internalize the stub unwind entries. */
if (stub_unwind_size > 0)
{
unsigned int i;
char *buf = alloca (stub_unwind_size);
/* Read in the stub unwind entries. */
bfd_get_section_contents (objfile->obfd, stub_unwind_sec, buf,
0, stub_unwind_size);
/* Now convert them into regular unwind entries. */
for (i = 0; i < stub_entries; i++, index++)
{
/* Clear out the next unwind entry. */
memset (&ui->table[index], 0, sizeof (struct unwind_table_entry));
/* Convert offset & size into region_start and region_end.
Stuff away the stub type into "reserved" fields. */
ui->table[index].region_start = bfd_get_32 (objfile->obfd,
(bfd_byte *) buf);
buf += 4;
ui->table[index].stub_type = bfd_get_8 (objfile->obfd,
(bfd_byte *) buf);
buf += 2;
ui->table[index].region_end
= ui->table[index].region_start + 4 *
(bfd_get_16 (objfile->obfd, (bfd_byte *) buf) - 1);
buf += 2;
}
}
/* Unwind table needs to be kept sorted. */
qsort (ui->table, total_entries, sizeof (struct unwind_table_entry),
compare_unwind_entries);
/* Keep a pointer to the unwind information. */
objfile->obj_private = (PTR) ui;
}
/* Lookup the unwind (stack backtrace) info for the given PC. We search all
of the objfiles seeking the unwind table entry for this PC. Each objfile
contains a sorted list of struct unwind_table_entry. Since we do a binary
@ -267,7 +468,10 @@ find_unwind_entry(pc)
ui = OBJ_UNWIND_INFO (objfile);
if (!ui)
continue;
{
read_unwind_info (objfile);
ui = OBJ_UNWIND_INFO (objfile);
}
/* First, check the cache */

176
gdb/paread.c
View File

@ -47,16 +47,9 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
static void
pa_symfile_init PARAMS ((struct objfile *));
static int
compare_unwind_entries PARAMS ((struct unwind_table_entry *,
struct unwind_table_entry *));
static void
pa_new_init PARAMS ((struct objfile *));
static void
read_unwind_info PARAMS ((struct objfile *));
static void
pa_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
@ -300,173 +293,6 @@ pa_symtab_read (abfd, addr, objfile)
install_minimal_symbols (objfile);
}
/* Compare the start address for two unwind entries returning 1 if
the first address is larger than the second, -1 if the second is
larger than the first, and zero if they are equal. */
static int
compare_unwind_entries (a, b)
struct unwind_table_entry *a;
struct unwind_table_entry *b;
{
if (a->region_start > b->region_start)
return 1;
else if (a->region_start < b->region_start)
return -1;
else
return 0;
}
/* Read in the backtrace information stored in the `$UNWIND_START$' section of
the object file. This info is used mainly by find_unwind_entry() to find
out the stack frame size and frame pointer used by procedures. We put
everything on the psymbol obstack in the objfile so that it automatically
gets freed when the objfile is destroyed. */
static void
read_unwind_info (objfile)
struct objfile *objfile;
{
asection *unwind_sec, *stub_unwind_sec;
unsigned unwind_size, stub_unwind_size, total_size;
unsigned index, unwind_entries, stub_entries, total_entries;
struct obj_unwind_info *ui;
ui = obstack_alloc (&objfile->psymbol_obstack,
sizeof (struct obj_unwind_info));
ui->table = NULL;
ui->cache = NULL;
ui->last = -1;
/* Get hooks to both unwind sections. */
unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_START$");
stub_unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_END$");
/* Get sizes and unwind counts for both sections. */
if (unwind_sec)
{
unwind_size = bfd_section_size (objfile->obfd, unwind_sec);
unwind_entries = unwind_size / UNWIND_ENTRY_SIZE;
}
else
{
unwind_size = 0;
unwind_entries = 0;
}
if (stub_unwind_sec)
{
stub_unwind_size = bfd_section_size (objfile->obfd, stub_unwind_sec);
stub_entries = stub_unwind_size / STUB_UNWIND_ENTRY_SIZE;
}
else
{
stub_unwind_size = 0;
stub_entries = 0;
}
/* Compute total number of stubs. */
total_entries = unwind_entries + stub_entries;
total_size = total_entries * sizeof (struct unwind_table_entry);
/* Allocate memory for the unwind table. */
ui->table = obstack_alloc (&objfile->psymbol_obstack, total_size);
ui->last = total_entries - 1;
/* We will read the unwind entries into temporary memory, then
fill in the actual unwind table. */
if (unwind_size > 0)
{
unsigned long tmp;
unsigned i;
char *buf = alloca (unwind_size);
bfd_get_section_contents (objfile->obfd, unwind_sec, buf, 0, unwind_size);
/* Now internalize the information being careful to handle host/target
endian issues. */
for (i = 0; i < unwind_entries; i++)
{
ui->table[i].region_start = bfd_get_32 (objfile->obfd,
(bfd_byte *)buf);
buf += 4;
ui->table[i].region_end = bfd_get_32 (objfile->obfd, (bfd_byte *)buf);
buf += 4;
tmp = bfd_get_32 (objfile->obfd, (bfd_byte *)buf);
buf += 4;
ui->table[i].Cannot_unwind = (tmp >> 31) & 0x1;;
ui->table[i].Millicode = (tmp >> 30) & 0x1;
ui->table[i].Millicode_save_sr0 = (tmp >> 29) & 0x1;
ui->table[i].Region_description = (tmp >> 27) & 0x3;
ui->table[i].reserved1 = (tmp >> 26) & 0x1;
ui->table[i].Entry_SR = (tmp >> 25) & 0x1;
ui->table[i].Entry_FR = (tmp >> 21) & 0xf;
ui->table[i].Entry_GR = (tmp >> 16) & 0x1f;
ui->table[i].Args_stored = (tmp >> 15) & 0x1;
ui->table[i].Variable_Frame = (tmp >> 14) & 0x1;
ui->table[i].Separate_Package_Body = (tmp >> 13) & 0x1;
ui->table[i].Frame_Extension_Millicode = (tmp >> 12 ) & 0x1;
ui->table[i].Stack_Overflow_Check = (tmp >> 11) & 0x1;
ui->table[i].Two_Instruction_SP_Increment = (tmp >> 10) & 0x1;
ui->table[i].Ada_Region = (tmp >> 9) & 0x1;
ui->table[i].reserved2 = (tmp >> 5) & 0xf;
ui->table[i].Save_SP = (tmp >> 4) & 0x1;
ui->table[i].Save_RP = (tmp >> 3) & 0x1;
ui->table[i].Save_MRP_in_frame = (tmp >> 2) & 0x1;
ui->table[i].extn_ptr_defined = (tmp >> 1) & 0x1;
ui->table[i].Cleanup_defined = tmp & 0x1;
tmp = bfd_get_32 (objfile->obfd, (bfd_byte *)buf);
buf += 4;
ui->table[i].MPE_XL_interrupt_marker = (tmp >> 31) & 0x1;
ui->table[i].HP_UX_interrupt_marker = (tmp >> 30) & 0x1;
ui->table[i].Large_frame = (tmp >> 29) & 0x1;
ui->table[i].reserved4 = (tmp >> 27) & 0x3;
ui->table[i].Total_frame_size = tmp & 0x7ffffff;
}
}
if (stub_unwind_size > 0)
{
unsigned int i;
char *buf = alloca (stub_unwind_size);
/* Read in the stub unwind entries. */
bfd_get_section_contents (objfile->obfd, stub_unwind_sec, buf,
0, stub_unwind_size);
/* Now convert them into regular unwind entries. */
index = unwind_entries;
for (i = 0; i < stub_entries; i++, index++)
{
/* Clear out the next unwind entry. */
memset (&ui->table[index], 0, sizeof (struct unwind_table_entry));
/* Convert offset & size into region_start and region_end.
Stuff away the stub type into "reserved" fields. */
ui->table[index].region_start = bfd_get_32 (objfile->obfd,
(bfd_byte *) buf);
buf += 4;
ui->table[index].stub_type = bfd_get_8 (objfile->obfd,
(bfd_byte *) buf);
buf += 2;
ui->table[index].region_end
= ui->table[index].region_start + 4 *
(bfd_get_16 (objfile->obfd, (bfd_byte *) buf) - 1);
buf += 2;
}
}
/* Unwind table needs to be kept sorted. */
qsort (ui->table, total_entries, sizeof (struct unwind_table_entry),
compare_unwind_entries);
/* Keep a pointer to the unwind information. */
objfile->obj_private = (PTR) ui;
}
/* Scan and build partial symbols for a symbol file.
We have been initialized by a call to pa_symfile_init, which
currently does nothing.
@ -523,8 +349,6 @@ pa_symfile_read (objfile, section_offsets, mainline)
pastab_build_psymtabs (objfile, section_offsets, mainline);
read_unwind_info(objfile);
do_cleanups (back_to);
}