darlinghq/darling-gdb
1
0
Fork 0
mirror of https://github.com/darlinghq/darling-gdb.git synced 2024-11-25 05:00:01 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

* mips-tdep.c, mipsread.c, tm-mips.h: Get rid of ".gdbinfo."

Browse Source 
symbol.  #define MIPS_EFI_SYMBOL_NAME instead.  Use different
value so that demangler won't be invoked.  This greatly speeds up
stepping.
* mips-tdep.c (mips_pop_frame):  Rewrite handling of
linked_proc_info so that it properly deallocates the appropriate
item after it is done with it instead of before.
* Don't pass bogus frame pointer to create_new_frame().  Just
leave it as zero so that lower level code will figure out the
correct value.
This commit is contained in:
Stu Grossman 1992-10-15 08:36:30 +00:00
parent 7536558918
commit dac4929a6d
4 changed files with 163 additions and 93 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
gdb/ChangeLog
View File

@ -1,3 +1,16 @@
Thu Oct 15 01:27:32 1992 Stu Grossman (grossman at cygnus.com)
* mips-tdep.c, mipsread.c, tm-mips.h: Get rid of ".gdbinfo."
symbol. #define MIPS_EFI_SYMBOL_NAME instead. Use different
value so that demangler won't be invoked. This greatly speeds up
stepping.
* mips-tdep.c (mips_pop_frame): Rewrite handling of
linked_proc_info so that it properly deallocates the appropriate
item after it is done with it instead of before.
* Don't pass bogus frame pointer to create_new_frame(). Just
leave it as zero so that lower level code will figure out the
correct value.
Wed Oct 14 18:56:28 1992 K. Richard Pixley (rich@sendai.cygnus.com)
Sony News native support.

58
gdb/mips-tdep.c
View File

@ -79,7 +79,7 @@ struct linked_proc_info
{
struct mips_extra_func_info info;
struct linked_proc_info *next;
} * linked_proc_desc_table = NULL;
} *linked_proc_desc_table = NULL;
#define READ_FRAME_REG(fi, regno) read_next_frame_reg((fi)->next, regno)
@ -231,7 +231,7 @@ find_proc_desc(pc, next_frame)
mips_extra_func_info_t proc_desc;
struct block *b = block_for_pc(pc);
struct symbol *sym =
b ? lookup_symbol(".gdbinfo.", b, LABEL_NAMESPACE, 0, NULL) : NULL;
b ? lookup_symbol(MIPS_EFI_SYMBOL_NAME, b, LABEL_NAMESPACE, 0, NULL) : NULL;
if (sym)
{
@ -525,27 +525,21 @@ mips_push_dummy_frame()
void
mips_pop_frame()
{ register int regnum;
{
register int regnum;
FRAME frame = get_current_frame ();
CORE_ADDR new_sp = frame->frame;
mips_extra_func_info_t proc_desc = frame->proc_desc;
if (PROC_DESC_IS_DUMMY(proc_desc))
{
struct linked_proc_info **ptr = &linked_proc_desc_table;;
for (; &ptr[0]->info != proc_desc; ptr = &ptr[0]->next )
if (ptr[0] == NULL) abort();
*ptr = ptr[0]->next;
free (ptr[0]);
write_register (HI_REGNUM, read_memory_integer(new_sp - 8, 4));
write_register (LO_REGNUM, read_memory_integer(new_sp - 12, 4));
write_register (FCRCS_REGNUM, read_memory_integer(new_sp - 16, 4));
}
write_register (PC_REGNUM, FRAME_SAVED_PC(frame));
if (frame->proc_desc) {
if (proc_desc)
{
for (regnum = 32; --regnum >= 0; )
if (PROC_REG_MASK(proc_desc) & (1 << regnum))
write_register (regnum,
read_memory_integer (frame->saved_regs->regs[regnum], 4));
read_memory_integer (frame->saved_regs->regs[regnum],
4));
for (regnum = 32; --regnum >= 0; )
if (PROC_FREG_MASK(proc_desc) & (1 << regnum))
write_register (regnum + FP0_REGNUM,
@ -553,7 +547,35 @@ mips_pop_frame()
}
write_register (SP_REGNUM, new_sp);
flush_cached_frames ();
set_current_frame (create_new_frame (new_sp, read_pc ()));
/* We let mips_init_extra_frame_info figure out the frame pointer */
set_current_frame (create_new_frame (0, read_pc ()));
if (PROC_DESC_IS_DUMMY(proc_desc))
{
struct linked_proc_info *pi_ptr, *prev_ptr;
for (pi_ptr = linked_proc_desc_table, prev_ptr = NULL;
pi_ptr != NULL;
prev_ptr = pi_ptr, pi_ptr = pi_ptr->next)
{
if (&pi_ptr->info == proc_desc)
break;
}
if (pi_ptr == NULL)
error ("Can't locate dummy extra frame info\n");
if (prev_ptr != NULL)
prev_ptr->next = pi_ptr->next;
else
linked_proc_desc_table = pi_ptr->next;
free (pi_ptr);
write_register (HI_REGNUM, read_memory_integer(new_sp - 8, 4));
write_register (LO_REGNUM, read_memory_integer(new_sp - 12, 4));
write_register (FCRCS_REGNUM, read_memory_integer(new_sp - 16, 4));
}
}
static void
@ -709,7 +731,7 @@ mips_skip_prologue(pc)
b = block_for_pc(pc);
if (!b) return pc;
f = lookup_symbol(".gdbinfo.", b, LABEL_NAMESPACE, 0, NULL);
f = lookup_symbol(MIPS_EFI_SYMBOL_NAME, b, LABEL_NAMESPACE, 0, NULL);
if (!f) return pc;
/* Ideally, I would like to use the adjusted info
from mips_frame_info(), but for all practical

110
gdb/mipsread.c
View File

@ -57,6 +57,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "objfiles.h"
#include "obstack.h"
#include "buildsym.h"
#include "stabsread.h"
#ifdef USG
#include <sys/types.h>
@ -68,6 +69,8 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <sys/file.h>
#include <sys/stat.h>
#include "gdb-stabs.h"
#include "coff/mips.h" /* COFF-like aspects of ecoff files */
#include "coff/ecoff-ext.h" /* External forms of ecoff sym structures */
@ -230,7 +233,7 @@ static void
fixup_symtab PARAMS ((HDRR *, char *, int, bfd *));
static void
read_mips_symtab PARAMS ((struct objfile *));
read_mips_symtab PARAMS ((struct objfile *, struct section_offsets *));
static void
read_the_mips_symtab PARAMS ((bfd *, CORE_ADDR *));
@ -239,7 +242,8 @@ static int
upgrade_type PARAMS ((struct type **, int, union aux_ext *, int));
static void
parse_partial_symbols PARAMS ((int, struct objfile *));
parse_partial_symbols PARAMS ((int, struct objfile *,
struct section_offsets *));
static int
cross_ref PARAMS ((union aux_ext *, struct type **, enum type_code, char **,
@ -336,9 +340,9 @@ mipscoff_symfile_init (objfile)
}
static void
mipscoff_symfile_read (objfile, addr, mainline)
mipscoff_symfile_read (objfile, section_offsets, mainline)
struct objfile *objfile;
CORE_ADDR addr;
struct section_offsets *section_offsets;
int mainline;
{
init_minimal_symbol_collection ();
@ -347,7 +351,7 @@ mipscoff_symfile_read (objfile, addr, mainline)
/* Now that the executable file is positioned at symbol table,
process it and define symbols accordingly. */
read_mips_symtab(objfile);
read_mips_symtab(objfile, section_offsets);
/* Install any minimal symbols that have been collected as the current
minimal symbols for this objfile. */
@ -696,19 +700,19 @@ fdr_name(name)
}
/* Read in and parse the symtab of the file DESC. INCREMENTAL says
whether we are adding to the general symtab or not.
FIXME: INCREMENTAL is currently always zero, though it should not be. */
/* Read in and parse the symtab of the file OBJFILE. Symbols from
different sections are relocated via the SECTION_OFFSETS. */
static void
read_mips_symtab (objfile)
read_mips_symtab (objfile, section_offsets)
struct objfile *objfile;
struct section_offsets *section_offsets;
{
CORE_ADDR end_of_text_seg;
read_the_mips_symtab(objfile->obfd, &end_of_text_seg);
parse_partial_symbols(end_of_text_seg, objfile);
parse_partial_symbols(end_of_text_seg, objfile, section_offsets);
#if 0
/*
@ -1181,8 +1185,7 @@ data: /* Common code for symbols describing data */
TYPE_LENGTH(t) = sh->value;
TYPE_NFIELDS(t) = nfields;
TYPE_FIELDS(t) = f = (struct field*)
obstack_alloc (&current_objfile -> type_obstack,
nfields * sizeof (struct field));
TYPE_ALLOC (t, nfields * sizeof (struct field));
if (type_code == TYPE_CODE_ENUM) {
/* This is a non-empty enum. */
@ -1250,7 +1253,7 @@ data: /* Common code for symbols describing data */
/* Make up special symbol to contain procedure specific
info */
s = new_symbol(".gdbinfo.");
s = new_symbol(MIPS_EFI_SYMBOL_NAME);
SYMBOL_NAMESPACE(s) = LABEL_NAMESPACE;
SYMBOL_CLASS(s) = LOC_CONST;
SYMBOL_TYPE(s) = builtin_type_void;
@ -1281,6 +1284,10 @@ data: /* Common code for symbols describing data */
address of the end of this block. */
BLOCK_END(top_stack->cur_block) = sh->value + top_stack->procadr;
shrink_block(top_stack->cur_block, top_stack->cur_st);
} else if (sh->sc == scText && top_stack->blocktype == stFile) {
/* End of file. Pop parse stack and ignore. Higher
level code deals with this. */
;
} else complain (&stEnd_complaint, (char *)sh->sc);
pop_parse_stack(); /* restore previous lexical context */
@ -1473,9 +1480,8 @@ parse_type(ax, bs, bigend)
/* Deal with range types */
if (t->bt == btRange) {
TYPE_NFIELDS (tp) = 2;
TYPE_FIELDS (tp) =
(struct field *) obstack_alloc (&current_objfile -> type_obstack,
2 * sizeof (struct field));
TYPE_FIELDS (tp) = (struct field *)
TYPE_ALLOC (tp, 2 * sizeof (struct field));
TYPE_FIELD_NAME (tp, 0) = obsavestring ("Low", strlen ("Low"),
&current_objfile -> type_obstack);
TYPE_FIELD_BITPOS (tp, 0) = AUX_GET_DNLOW (bigend, ax);
@ -1619,7 +1625,7 @@ upgrade_type(tpp, tq, ax, bigend)
/* Parse a procedure descriptor record PR. Note that the procedure
is parsed _after_ the local symbols, now we just insert the extra
information we need into a special ".gdbinfo." symbol that has already
information we need into a MIPS_EFI_SYMBOL_NAME symbol that has already
been placed in the procedure's main block. Note also that images that
have been partially stripped (ld -x) have been deprived
of local symbols, and we have to cope with them here.
@ -1674,7 +1680,7 @@ parse_procedure (pr, bound, have_stabs)
#endif
}
i = mylookup_symbol(".gdbinfo.", b, LABEL_NAMESPACE, LOC_CONST);
i = mylookup_symbol(MIPS_EFI_SYMBOL_NAME, b, LABEL_NAMESPACE, LOC_CONST);
if (i)
{
@ -1824,9 +1830,10 @@ parse_lines(fh, lt)
the symtab we are reading. */
static void
parse_partial_symbols (end_of_text_seg, objfile)
parse_partial_symbols (end_of_text_seg, objfile, section_offsets)
int end_of_text_seg;
struct objfile *objfile;
struct section_offsets *section_offsets;
{
int f_idx, s_idx;
HDRR *hdr = cur_hdr;
@ -1864,7 +1871,7 @@ parse_partial_symbols (end_of_text_seg, objfile)
(struct partial_symtab **) alloca (dependencies_allocated *
sizeof (struct partial_symtab *));
last_source_file = 0;
last_source_file = NULL;
/*
* Big plan:
@ -1936,13 +1943,14 @@ parse_partial_symbols (end_of_text_seg, objfile)
for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++) {
struct partial_symtab *save_pst;
EXTR **ext_ptr;
cur_fdr = fh = f_idx + (FDR *)(cur_hdr->cbFdOffset);
if (fh->csym == 0) {
fdr_to_pst[f_idx].pst = NULL;
continue;
}
pst = start_psymtab_common (objfile, 0, (char*)fh->rss,
pst = start_psymtab_common (objfile, section_offsets, (char*)fh->rss,
fh->cpd ? fh->adr : 0,
objfile->global_psymbols.next,
objfile->static_psymbols.next);
@ -1962,15 +1970,7 @@ parse_partial_symbols (end_of_text_seg, objfile)
pst->texthigh = pst->textlow;
#if 0 /* This is done in start_psymtab_common */
pst->globals_offset = global_psymbols.next - global_psymbols.list;
pst->statics_offset = static_psymbols.next - static_psymbols.list;
pst->n_global_syms = 0;
pst->n_static_syms = 0;
#endif
/* The second symbol must be @stab.
/* For stabs-in-ecoff files, the second symbol must be @stab.
This symbol is emitted by mips-tfile to signal
that the current object file uses encapsulated stabs
instead of mips ecoff for local symbols.
@ -2001,14 +2001,12 @@ parse_partial_symbols (end_of_text_seg, objfile)
#define SET_NAMESTRING() namestring = (char*)sh->iss
#define CUR_SYMBOL_TYPE type_code
#define CUR_SYMBOL_VALUE sh->value
#define START_PSYMTAB(ofile,addr,fname,low,symoff,global_syms,static_syms)\
#define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms)\
pst = save_pst
#define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps) (void)0
#define addr 0 /* FIXME, should be offset of addresses */
#define HANDLE_RBRAC(val) \
if ((val) > save_pst->texthigh) save_pst->texthigh = (val);
#include "partial-stab.h"
#undef addr
}
}
else {
@ -2100,6 +2098,12 @@ parse_partial_symbols (end_of_text_seg, objfile)
case stEnd: /* Ends of files */
goto skip;
case stLocal: /* Local variables */
/* Normally these are skipped because we skip over
all blocks we see. However, these can occur
as visible symbols in a .h file that contains code. */
goto skip;
default:
/* Both complaints are valid: one gives symbol name,
the other the offending symbol type. */
@ -2366,8 +2370,8 @@ psymtab_to_symtab_1(pst, filename)
CORE_ADDR valu = sh->value;
if (MIPS_IS_STAB(sh)) {
int type_code = MIPS_UNMARK_STAB(sh->index);
process_one_symbol (type_code, 0, valu, name, /*FIXME*/ 0,
pst->objfile);
process_one_symbol (type_code, 0, valu, name,
pst->section_offsets, pst->objfile);
if (type_code == N_FUN) {
/* Make up special symbol to contain
procedure specific info */
@ -2375,7 +2379,7 @@ psymtab_to_symtab_1(pst, filename)
(struct mips_extra_func_info *)
obstack_alloc(&current_objfile->symbol_obstack,
sizeof(struct mips_extra_func_info));
struct symbol *s = new_symbol(".gdbinfo.");
struct symbol *s = new_symbol(MIPS_EFI_SYMBOL_NAME);
SYMBOL_NAMESPACE(s) = LABEL_NAMESPACE;
SYMBOL_CLASS(s) = LOC_CONST;
SYMBOL_TYPE(s) = builtin_type_void;
@ -2390,6 +2394,7 @@ psymtab_to_symtab_1(pst, filename)
else complain (&stab_unknown_complaint, (char *)sh->iss);
}
st = end_symtab (pst->texthigh, 0, 0, pst->objfile);
end_stabs ();
/* Sort the symbol table now, we are done adding symbols to it.
We must do this before parse_procedure calls lookup_symbol. */
@ -2411,6 +2416,8 @@ psymtab_to_symtab_1(pst, filename)
* This symbol table contains ordinary ecoff entries.
*/
/* FIXME: doesn't use pst->section_offsets. */
int f_max;
int maxlines;
EXTR **ext_ptr;
@ -2457,7 +2464,7 @@ psymtab_to_symtab_1(pst, filename)
for (cur_sdx = 0; cur_sdx < fh->csym; ) {
sh = (SYMR *) (fh->isymBase) + cur_sdx;
cur_sdx += parse_symbol(sh, (union aux_ent *)fh->iauxBase,
cur_sdx += parse_symbol(sh, (union aux_ext *)fh->iauxBase,
fh->fBigendian);
}
@ -3001,7 +3008,7 @@ fixup_sigtramp()
(struct objfile *) NULL);
TYPE_TARGET_TYPE(SYMBOL_TYPE(s)) = builtin_type_void;
/* Need a block to allocate .gdbinfo. in */
/* Need a block to allocate MIPS_EFI_SYMBOL_NAME in */
b = new_block(1);
SYMBOL_BLOCK_VALUE(s) = b;
BLOCK_START(b) = sigtramp_address;
@ -3011,7 +3018,7 @@ fixup_sigtramp()
add_block(b, st);
sort_blocks(st);
/* Make a .gdbinfo. for it */
/* Make a MIPS_EFI_SYMBOL_NAME entry for it */
{
struct mips_extra_func_info *e =
(struct mips_extra_func_info *)
@ -3029,7 +3036,7 @@ fixup_sigtramp()
e->pdr.isym = (long)s;
current_objfile = st->objfile; /* Keep new_symbol happy */
s = new_symbol(".gdbinfo.");
s = new_symbol(MIPS_EFI_SYMBOL_NAME);
SYMBOL_VALUE(s) = (int) e;
SYMBOL_NAMESPACE(s) = LABEL_NAMESPACE;
SYMBOL_CLASS(s) = LOC_CONST;
@ -3039,6 +3046,28 @@ fixup_sigtramp()
BLOCK_SYM(b,BLOCK_NSYMS(b)++) = s;
}
/* Fake up identical offsets for all sections. */
struct section_offsets *
mipscoff_symfile_offsets (objfile, addr)
struct objfile *objfile;
CORE_ADDR addr;
{
struct section_offsets *section_offsets;
int i;
section_offsets = (struct section_offsets *)
obstack_alloc (&objfile -> psymbol_obstack,
sizeof (struct section_offsets) +
sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1));
for (i = 0; i < SECT_OFF_MAX; i++)
ANOFFSET (section_offsets, i) = addr;
return section_offsets;
}
/* Initialization */
@ -3050,6 +3079,7 @@ static struct sym_fns ecoff_sym_fns =
mipscoff_symfile_init,/* sym_init: read initial info, setup for sym_read() */
mipscoff_symfile_read,/* sym_read: read a symbol file into symtab */
mipscoff_symfile_finish,/* sym_finish: finished with file, cleanup */
mipscoff_symfile_offsets,/* sym_offsets: dummy FIXME til implem sym reloc */
NULL /* next: pointer to next struct sym_fns */
};

5
gdb/tm-mips.h
View File

@ -327,6 +327,11 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
(prev)->pc = ((fromleaf) ? SAVED_PC_AFTER_CALL ((prev)->next) : \
(prev)->next ? FRAME_SAVED_PC ((prev)->next) : read_pc ());
/* Special symbol found in blocks associated with routines. We can hang
mips_extra_func_info_t's off of this. */
#define MIPS_EFI_SYMBOL_NAME "__GDB_EFI_INFO__"
/* Specific information about a procedure.
This overlays the MIPS's PDR records,
mipsread.c (ab)uses this to save memory */