mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-11-24 12:39:59 +00:00
2007-01-04 Qinwei <qinwei@sunnorth.com.cn>
* NEWS: New port to S+core. * MAINTAINERS (Write After Approval, Responsible Maintainers): Add myself. * Makefile.in: Add dependencies for S+core files. * configure.tgt (score*, score-*-*): Add S+core target. * config/score/embed.mt: New file. * score-tdep.c: New file. * score-tdep.h: New file.
This commit is contained in:
Qinwei
parent
a6cfbe6891
commit
27fd2f5070
@ -1,3 +1,15 @@
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2007-01-04 Qinwei <qinwei@sunnorth.com.cn>
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* NEWS: New port to S+core.
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* MAINTAINERS (Write After Approval, Responsible Maintainers):
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Add myself.
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* Makefile.in: Add dependencies for S+core files.
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* configure.tgt (score*, score-*-*): Add S+core target.
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* config/score/embed.mt: New file.
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* score-tdep.c: New file.
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* score-tdep.h: New file.
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2007-01-04 Joel Brobecker <brobecker@adacore.com>
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* ada-lang.c (ada_evaluate_subexp) [OP_TYPE]: Return a value with
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@ -301,6 +301,9 @@ the native maintainer when resolving ABI issues.
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s390 --target=s390-linux-gnu ,-Werror
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score --target=score-elf
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Qinwei qinwei@sunnorth.com.cn
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sh --target=sh-elf ,-Werror
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--target=sh64-elf ,-Werror
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@ -525,6 +528,7 @@ Hans-Peter Nilsson hp@bitrange.com
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David O'Brien obrien@freebsd.org
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Alexandre Oliva aoliva@redhat.com
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Vladimir Prus vladimir@codesourcery.com
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Qinwei qinwei@sunnorth.com.cn
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Ramana Radhakrishnan ramana.radhakrishnan@codito.com
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Frederic Riss frederic.riss@st.com
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Tom Rix trix@redhat.com
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@ -783,6 +783,7 @@ rs6000_tdep_h = rs6000-tdep.h $(defs_h)
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s390_tdep_h = s390-tdep.h
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scm_lang_h = scm-lang.h $(scm_tags_h)
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scm_tags_h = scm-tags.h
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score_tdep_h = score-tdep.h
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sentinel_frame_h = sentinel-frame.h
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serial_h = serial.h
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ser_base_h = ser-base.h
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@ -1491,6 +1492,7 @@ ALLDEPFILES = \
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remote-st.c remote-utils.c dcache.c \
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rs6000-nat.c rs6000-tdep.c \
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s390-tdep.c s390-nat.c \
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score-tdep.c \
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ser-go32.c ser-pipe.c ser-tcp.c ser-mingw.c \
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sh-tdep.c sh64-tdep.c shnbsd-tdep.c shnbsd-nat.c \
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sol2-tdep.c \
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@ -2568,6 +2570,10 @@ scm-lang.o: scm-lang.c $(defs_h) $(symtab_h) $(gdbtypes_h) $(expression_h) \
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scm-valprint.o: scm-valprint.c $(defs_h) $(symtab_h) $(gdbtypes_h) \
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$(expression_h) $(parser_defs_h) $(language_h) $(value_h) \
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$(scm_lang_h) $(valprint_h) $(gdbcore_h) $(c_lang_h)
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score-tdep.o: score-tdep.c $(defs_h) $(gdb_assert_h) $(inferior_h) \
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$(symtab_h) $(objfiles_h) $(gdbcore_h) $(target_h) \
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$(arch_utils_h) $(regcache_h) $(dis_asm_h) $(frame_unwind_h) \
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$(frame_base_h) $(trad_frame_h) $(dwarf2_frame_h) $(score_tdep_h)
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sentinel-frame.o: sentinel-frame.c $(defs_h) $(regcache_h) \
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$(sentinel_frame_h) $(inferior_h) $(frame_unwind_h)
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ser-e7kpc.o: ser-e7kpc.c $(defs_h) $(serial_h) $(gdb_string_h)
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@ -24,6 +24,7 @@ powerpc*) gdb_target_cpu=powerpc ;;
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sparc*) gdb_target_cpu=sparc ;;
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thumb*) gdb_target_cpu=arm ;;
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s390*) gdb_target_cpu=s390 ;;
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score*) gdb_target_cpu=score ;;
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sh*) gdb_target_cpu=sh ;;
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spu*) gdb_target_cpu=spu ;;
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strongarm*) gdb_target_cpu=arm ;;
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@ -179,6 +180,7 @@ s390*-*-*) gdb_target=s390
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build_gdbserver=yes
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;;
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score-*-*) gdb_target=embed ;;
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sh*-*-pe) gdb_target=wince ;;
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sh-*-coff*) gdb_target=embed ;;
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sh-*-elf*) gdb_target=embed ;;
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906
gdb/score-tdep.c
Normal file
906
gdb/score-tdep.c
Normal file
@ -0,0 +1,906 @@
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/* Target-dependent code for the S+core architecture, for GDB,
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the GNU Debugger.
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Copyright (C) 2006
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Free Software Foundation, Inc.
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Contributed by Qinwei (qinwei@sunnorth.com.cn)
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Contributed by Ching-Peng Lin (cplin@sunplus.com)
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "defs.h"
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#include "gdb_assert.h"
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#include "inferior.h"
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#include "symtab.h"
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#include "objfiles.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "arch-utils.h"
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#include "regcache.h"
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#include "dis-asm.h"
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#include "frame-unwind.h"
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#include "frame-base.h"
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#include "trad-frame.h"
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#include "dwarf2-frame.h"
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#include "score-tdep.h"
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#define G_FLD(_i,_ms,_ls) (((_i) << (31 - (_ms))) >> (31 - (_ms) + (_ls)))
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#define RM_PBITS(_raw) ((G_FLD(_raw, 31, 16) << 15) | G_FLD(_raw, 14, 0))
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typedef struct{
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unsigned int v;
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unsigned int raw;
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char is15;
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}inst_t;
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struct score_frame_cache
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{
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CORE_ADDR base;
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struct trad_frame_saved_reg *saved_regs;
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};
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#if 0
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/* If S+core GCC will generate these instructions in the prologue:
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lw rx, imm1
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addi rx, -imm2
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mv! r2, rx
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then .pdr section is used. */
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#define P_SIZE 8
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#define PI_SYM 0
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#define PI_R_MSK 1
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#define PI_R_OFF 2
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#define PI_R_LEF 4
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#define PI_F_OFF 5
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#define PI_F_REG 6
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#define PI_RAREG 7
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typedef struct frame_extra_info
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{
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CORE_ADDR p_frame;
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unsigned int pdr[P_SIZE];
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} extra_info_t;
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struct obj_priv
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{
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bfd_size_type size;
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char *contents;
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};
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static bfd *the_bfd;
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static int
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score_compare_pdr_entries (const void *a, const void *b)
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{
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CORE_ADDR lhs = bfd_get_32 (the_bfd, (bfd_byte *) a);
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CORE_ADDR rhs = bfd_get_32 (the_bfd, (bfd_byte *) b);
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if (lhs < rhs)
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return -1;
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else if (lhs == rhs)
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return 0;
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else
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return 1;
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}
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static void
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score_analyze_pdr_section (CORE_ADDR startaddr, CORE_ADDR pc,
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struct frame_info *next_frame,
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struct score_frame_cache *this_cache)
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{
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struct symbol *sym;
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struct obj_section *sec;
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extra_info_t *fci_ext;
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CORE_ADDR leaf_ra_stack_addr = -1;
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gdb_assert (startaddr <= pc);
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gdb_assert (this_cache != NULL);
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fci_ext = frame_obstack_zalloc (sizeof (extra_info_t));
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if ((sec = find_pc_section (pc)) == NULL)
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{
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error ("Can't find section in file:%s, line:%d!", __FILE__, __LINE__);
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return;
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}
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/* Anylyze .pdr section and get coresponding fields. */
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{
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static struct obj_priv *priv = NULL;
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if (priv == NULL)
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{
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asection *bfdsec;
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priv = obstack_alloc (&sec->objfile->objfile_obstack,
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sizeof (struct obj_priv));
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if ((bfdsec = bfd_get_section_by_name (sec->objfile->obfd, ".pdr")))
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{
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priv->size = bfd_section_size (sec->objfile->obfd, bfdsec);
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priv->contents = obstack_alloc (&sec->objfile->objfile_obstack,
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priv->size);
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bfd_get_section_contents (sec->objfile->obfd, bfdsec,
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priv->contents, 0, priv->size);
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the_bfd = sec->objfile->obfd;
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qsort (priv->contents, priv->size / 32, 32,
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score_compare_pdr_entries);
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the_bfd = NULL;
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}
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else
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priv->size = 0;
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}
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if (priv->size != 0)
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{
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int low = 0, mid, high = priv->size / 32;
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char *ptr;
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do
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{
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CORE_ADDR pdr_pc;
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mid = (low + high) / 2;
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ptr = priv->contents + mid * 32;
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pdr_pc = bfd_get_signed_32 (sec->objfile->obfd, ptr);
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pdr_pc += ANOFFSET (sec->objfile->section_offsets,
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SECT_OFF_TEXT (sec->objfile));
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if (pdr_pc == startaddr)
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break;
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if (pdr_pc > startaddr)
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high = mid;
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else
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low = mid + 1;
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}
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while (low != high);
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if (low != high)
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{
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gdb_assert (bfd_get_32 (sec->objfile->obfd, ptr) == startaddr);
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#define EXT_PDR(_pi) bfd_get_32(sec->objfile->obfd, ptr+((_pi)<<2))
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fci_ext->pdr[PI_SYM] = EXT_PDR (PI_SYM);
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fci_ext->pdr[PI_R_MSK] = EXT_PDR (PI_R_MSK);
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fci_ext->pdr[PI_R_OFF] = EXT_PDR (PI_R_OFF);
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fci_ext->pdr[PI_R_LEF] = EXT_PDR (PI_R_LEF);
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fci_ext->pdr[PI_F_OFF] = EXT_PDR (PI_F_OFF);
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fci_ext->pdr[PI_F_REG] = EXT_PDR (PI_F_REG);
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fci_ext->pdr[PI_RAREG] = EXT_PDR (PI_RAREG);
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#undef EXT_PDR
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}
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}
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}
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}
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#endif
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static struct type *
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score_register_type (struct gdbarch *gdbarch, int regnum)
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{
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gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS);
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return builtin_type_uint32;
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}
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static LONGEST
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score_read_unsigned_register (int regnum)
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{
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LONGEST val;
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regcache_cooked_read_unsigned (current_regcache, regnum, &val);
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return val;
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}
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static CORE_ADDR
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score_read_sp (void)
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{
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return score_read_unsigned_register (SCORE_SP_REGNUM);
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}
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static CORE_ADDR
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score_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
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{
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return frame_unwind_register_unsigned (next_frame, SCORE_PC_REGNUM);
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}
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static const char *
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score_register_name (int regnum)
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{
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const char *score_register_names[] = {
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
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"PSR", "COND", "ECR", "EXCPVEC",
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"CCR", "EPC", "EMA", "TLBLOCK",
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"TLBPT", "PEADDR", "TLBRPT", "PEVN",
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"PECTX", "LIMPFN", "LDMPFN", "PREV",
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"DREG", "PC", "DSAVE", "COUNTER",
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"LDCR", "STCR", "CEH", "CEL",
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};
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gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS);
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return score_register_names[regnum];
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}
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static int
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score_register_sim_regno (int regnum)
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{
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gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS);
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return regnum;
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}
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static int
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score_print_insn (bfd_vma memaddr, struct disassemble_info *info)
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{
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if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
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return print_insn_big_score (memaddr, info);
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else
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return print_insn_little_score (memaddr, info);
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}
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static const gdb_byte *
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score_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
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{
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gdb_byte buf[SCORE_INSTLEN] = { 0 };
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int ret;
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unsigned int raw;
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if ((ret = target_read_memory (*pcptr & ~0x3, buf, SCORE_INSTLEN)) != 0)
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{
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memory_error (ret, *pcptr);
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}
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raw = extract_unsigned_integer (buf, SCORE_INSTLEN);
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if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
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{
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if (!(raw & 0x80008000))
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{
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/* 16bits instruction. */
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static gdb_byte big_breakpoint16[] = { 0x60, 0x02 };
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*pcptr &= ~0x1;
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*lenptr = sizeof (big_breakpoint16);
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return big_breakpoint16;
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}
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else
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{
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/* 32bits instruction. */
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static gdb_byte big_breakpoint32[] = { 0x80, 0x00, 0x80, 0x06 };
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*pcptr &= ~0x3;
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*lenptr = sizeof (big_breakpoint32);
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return big_breakpoint32;
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}
|
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}
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else
|
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{
|
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if (!(raw & 0x80008000))
|
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{
|
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/* 16bits instruction. */
|
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static gdb_byte little_breakpoint16[] = { 0x02, 0x60 };
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*pcptr &= ~0x1;
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*lenptr = sizeof (little_breakpoint16);
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return little_breakpoint16;
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||||
}
|
||||
else
|
||||
{
|
||||
/* 32bits instruction. */
|
||||
static gdb_byte little_breakpoint32[] = { 0x06, 0x80, 0x00, 0x80 };
|
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*pcptr &= ~0x3;
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||||
*lenptr = sizeof (little_breakpoint32);
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return little_breakpoint32;
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}
|
||||
}
|
||||
}
|
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|
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static CORE_ADDR
|
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score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
|
||||
{
|
||||
return align_down (addr, 16);
|
||||
}
|
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|
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static void
|
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score_xfer_register (struct regcache *regcache, int regnum, int length,
|
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enum bfd_endian endian, gdb_byte *readbuf,
|
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const gdb_byte *writebuf, int buf_offset)
|
||||
{
|
||||
int reg_offset = 0;
|
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gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS);
|
||||
|
||||
switch (endian)
|
||||
{
|
||||
case BFD_ENDIAN_BIG:
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reg_offset = SCORE_REGSIZE - length;
|
||||
break;
|
||||
case BFD_ENDIAN_LITTLE:
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reg_offset = 0;
|
||||
break;
|
||||
case BFD_ENDIAN_UNKNOWN:
|
||||
reg_offset = 0;
|
||||
break;
|
||||
default:
|
||||
internal_error (__FILE__, __LINE__, _("score_xfer_register error!"));
|
||||
}
|
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|
||||
if (readbuf != NULL)
|
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regcache_cooked_read_part (regcache, regnum, reg_offset, length,
|
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readbuf + buf_offset);
|
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if (writebuf != NULL)
|
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regcache_cooked_write_part (regcache, regnum, reg_offset, length,
|
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writebuf + buf_offset);
|
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}
|
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|
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static enum return_value_convention
|
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score_return_value (struct gdbarch *gdbarch, struct type *type,
|
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struct regcache *regcache,
|
||||
gdb_byte * readbuf, const gdb_byte * writebuf)
|
||||
{
|
||||
if (TYPE_CODE (type) == TYPE_CODE_STRUCT
|
||||
|| TYPE_CODE (type) == TYPE_CODE_UNION
|
||||
|| TYPE_CODE (type) == TYPE_CODE_ARRAY)
|
||||
return RETURN_VALUE_STRUCT_CONVENTION;
|
||||
else
|
||||
{
|
||||
int offset;
|
||||
int regnum;
|
||||
for (offset = 0, regnum = SCORE_A0_REGNUM;
|
||||
offset < TYPE_LENGTH (type);
|
||||
offset += SCORE_REGSIZE, regnum++)
|
||||
{
|
||||
int xfer = SCORE_REGSIZE;
|
||||
if (offset + xfer > TYPE_LENGTH (type))
|
||||
xfer = TYPE_LENGTH (type) - offset;
|
||||
score_xfer_register (regcache, regnum, xfer, TARGET_BYTE_ORDER,
|
||||
readbuf, writebuf, offset);
|
||||
}
|
||||
return RETURN_VALUE_REGISTER_CONVENTION;
|
||||
}
|
||||
}
|
||||
|
||||
static struct frame_id
|
||||
score_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
||||
{
|
||||
return frame_id_build (
|
||||
frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM),
|
||||
frame_pc_unwind (next_frame));
|
||||
}
|
||||
|
||||
static int
|
||||
score_type_needs_double_align (struct type *type)
|
||||
{
|
||||
enum type_code typecode = TYPE_CODE (type);
|
||||
|
||||
if (typecode == TYPE_CODE_INT && TYPE_LENGTH (type) == 8)
|
||||
return 1;
|
||||
if (typecode == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8)
|
||||
return 1;
|
||||
else if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION)
|
||||
{
|
||||
int i, n;
|
||||
|
||||
n = TYPE_NFIELDS (type);
|
||||
for (i = 0; i < n; i++)
|
||||
if (score_type_needs_double_align (TYPE_FIELD_TYPE (type, i)))
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static CORE_ADDR
|
||||
score_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
|
||||
struct regcache *regcache, CORE_ADDR bp_addr,
|
||||
int nargs, struct value **args, CORE_ADDR sp,
|
||||
int struct_return, CORE_ADDR struct_addr)
|
||||
{
|
||||
int argnum;
|
||||
int argreg;
|
||||
int arglen = 0;
|
||||
CORE_ADDR stack_offset = 0;
|
||||
CORE_ADDR addr = 0;
|
||||
|
||||
/* Step 1, Save RA. */
|
||||
regcache_cooked_write_unsigned (regcache, SCORE_RA_REGNUM, bp_addr);
|
||||
|
||||
/* Step 2, Make space on the stack for the args. */
|
||||
struct_addr = align_down (struct_addr, 16);
|
||||
sp = align_down (sp, 16);
|
||||
for (argnum = 0; argnum < nargs; argnum++)
|
||||
arglen += align_up (TYPE_LENGTH (value_type (args[argnum])),
|
||||
SCORE_REGSIZE);
|
||||
sp -= align_up (arglen, 16);
|
||||
|
||||
argreg = SCORE_BEGIN_ARG_REGNUM;
|
||||
|
||||
/* Step 3, Check if struct return then save the struct address to r4 and
|
||||
increase the stack_offset by 4. */
|
||||
if (struct_return)
|
||||
{
|
||||
regcache_cooked_write_unsigned (regcache, argreg++, struct_addr);
|
||||
stack_offset += SCORE_REGSIZE;
|
||||
}
|
||||
|
||||
/* Step 4, Load arguments:
|
||||
If arg length is too long (> 4 bytes),
|
||||
then split the arg and save every parts. */
|
||||
for (argnum = 0; argnum < nargs; argnum++)
|
||||
{
|
||||
struct value *arg = args[argnum];
|
||||
struct type *arg_type = check_typedef (value_type (arg));
|
||||
arglen = TYPE_LENGTH (arg_type);
|
||||
enum type_code typecode = TYPE_CODE (arg_type);
|
||||
const gdb_byte *val = value_contents (arg);
|
||||
int downward_offset = 0;
|
||||
|
||||
int odd_sized_struct_p = (arglen > SCORE_REGSIZE
|
||||
&& arglen % SCORE_REGSIZE != 0);
|
||||
int arg_last_part_p = 0;
|
||||
|
||||
/* If a arg should be aligned to 8 bytes (long long or double),
|
||||
the value should be put to even register numbers. */
|
||||
if (score_type_needs_double_align (arg_type))
|
||||
{
|
||||
if (argreg & 1)
|
||||
argreg++;
|
||||
}
|
||||
|
||||
/* If sizeof a block < SCORE_REGSIZE, then Score GCC will chose
|
||||
the default "downward"/"upward" method:
|
||||
|
||||
Example:
|
||||
|
||||
struct struc
|
||||
{
|
||||
char a; char b; char c;
|
||||
} s = {'a', 'b', 'c'};
|
||||
|
||||
Big endian: s = {X, 'a', 'b', 'c'}
|
||||
Little endian: s = {'a', 'b', 'c', X}
|
||||
|
||||
Where X is a hole. */
|
||||
|
||||
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
|
||||
&& (typecode == TYPE_CODE_STRUCT
|
||||
|| typecode == TYPE_CODE_UNION)
|
||||
&& argreg > SCORE_LAST_ARG_REGNUM
|
||||
&& arglen < SCORE_REGSIZE)
|
||||
downward_offset += (SCORE_REGSIZE - arglen);
|
||||
|
||||
while (arglen > 0)
|
||||
{
|
||||
int partial_len = arglen < SCORE_REGSIZE ? arglen : SCORE_REGSIZE;
|
||||
ULONGEST regval = extract_unsigned_integer (val, partial_len);
|
||||
|
||||
/* The last part of a arg should shift left when
|
||||
TARGET_BYTE_ORDER is BFD_ENDIAN_BIG. */
|
||||
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
|
||||
&& arg_last_part_p == 1
|
||||
&& (typecode == TYPE_CODE_STRUCT
|
||||
|| typecode == TYPE_CODE_UNION))
|
||||
regval <<= ((SCORE_REGSIZE - partial_len) * TARGET_CHAR_BIT);
|
||||
|
||||
/* Always increase the stack_offset and save args to stack. */
|
||||
addr = sp + stack_offset + downward_offset;
|
||||
write_memory (addr, val, partial_len);
|
||||
|
||||
if (argreg <= SCORE_LAST_ARG_REGNUM)
|
||||
{
|
||||
regcache_cooked_write_unsigned (regcache, argreg++, regval);
|
||||
if (arglen > SCORE_REGSIZE && arglen < SCORE_REGSIZE * 2)
|
||||
arg_last_part_p = 1;
|
||||
}
|
||||
|
||||
val += partial_len;
|
||||
arglen -= partial_len;
|
||||
stack_offset += align_up (partial_len, SCORE_REGSIZE);
|
||||
}
|
||||
}
|
||||
|
||||
/* Step 5, Save SP. */
|
||||
regcache_cooked_write_unsigned (regcache, SCORE_SP_REGNUM, sp);
|
||||
|
||||
return sp;
|
||||
}
|
||||
|
||||
static inst_t *
|
||||
score_fetch_instruction (CORE_ADDR addr)
|
||||
{
|
||||
static inst_t inst = { 0, 0 };
|
||||
char buf[SCORE_INSTLEN];
|
||||
int big;
|
||||
int ret = target_read_memory (addr & ~0x3, buf, SCORE_INSTLEN);
|
||||
unsigned int raw;
|
||||
|
||||
if (ret)
|
||||
{
|
||||
memory_error (ret, addr);
|
||||
return 0;
|
||||
}
|
||||
inst.raw = extract_unsigned_integer (buf, SCORE_INSTLEN);
|
||||
inst.is15 = !(inst.raw & 0x80008000);
|
||||
inst.v = RM_PBITS (inst.raw);
|
||||
big = (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG);
|
||||
|
||||
if (inst.is15)
|
||||
{
|
||||
if (big ^ ((addr & 0x2) == 2))
|
||||
inst.v = G_FLD (inst.v, 29, 15);
|
||||
else
|
||||
inst.v = G_FLD (inst.v, 14, 0);
|
||||
}
|
||||
return &inst;
|
||||
}
|
||||
|
||||
static CORE_ADDR
|
||||
score_skip_prologue (CORE_ADDR pc)
|
||||
{
|
||||
CORE_ADDR cpc = pc;
|
||||
int iscan = 32, stack_sub = 0;
|
||||
while (iscan-- > 0)
|
||||
{
|
||||
inst_t *inst = score_fetch_instruction (cpc);
|
||||
if (!inst)
|
||||
break;
|
||||
if (!inst->is15 && !stack_sub
|
||||
&& (G_FLD (inst->v, 29, 25) == 0x1
|
||||
&& G_FLD (inst->v, 24, 20) == 0x0))
|
||||
{
|
||||
/* addi r0, offset */
|
||||
pc = stack_sub = cpc + SCORE_INSTLEN;
|
||||
}
|
||||
else if (!inst->is15
|
||||
&& inst->v == RM_PBITS (0x8040bc56))
|
||||
{
|
||||
/* mv r2, r0 */
|
||||
pc = cpc + SCORE_INSTLEN;
|
||||
break;
|
||||
}
|
||||
else if (inst->is15
|
||||
&& inst->v == RM_PBITS (0x0203))
|
||||
{
|
||||
/* mv! r2, r0 */
|
||||
pc = cpc + SCORE16_INSTLEN;
|
||||
break;
|
||||
}
|
||||
else if (inst->is15
|
||||
&& ((G_FLD (inst->v, 14, 12) == 3) /* j15 form */
|
||||
|| (G_FLD (inst->v, 14, 12) == 4) /* b15 form */
|
||||
|| (G_FLD (inst->v, 14, 12) == 0x0
|
||||
&& G_FLD (inst->v, 3, 0) == 0x4))) /* br! */
|
||||
break;
|
||||
else if (!inst->is15
|
||||
&& ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */
|
||||
|| (G_FLD (inst->v, 29, 25) == 4) /* b32 form */
|
||||
|| (G_FLD (inst->v, 29, 25) == 0x0
|
||||
&& G_FLD (inst->v, 6, 1) == 0x4))) /* br */
|
||||
break;
|
||||
|
||||
cpc += inst->is15 ? SCORE16_INSTLEN : SCORE_INSTLEN;
|
||||
}
|
||||
return pc;
|
||||
}
|
||||
|
||||
static int
|
||||
score_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc)
|
||||
{
|
||||
inst_t *inst = score_fetch_instruction (cur_pc);
|
||||
|
||||
if (inst->v == 0x23)
|
||||
return 1; /* mv! r0, r2 */
|
||||
else if (G_FLD (inst->v, 14, 12) == 0x2
|
||||
&& G_FLD (inst->v, 3, 0) == 0xa)
|
||||
return 1; /* pop! */
|
||||
else if (G_FLD (inst->v, 14, 12) == 0x0
|
||||
&& G_FLD (inst->v, 7, 0) == 0x34)
|
||||
return 1; /* br! r3 */
|
||||
else if (G_FLD (inst->v, 29, 15) == 0x2
|
||||
&& G_FLD (inst->v, 6, 1) == 0x2b)
|
||||
return 1; /* mv r0, r2 */
|
||||
else if (G_FLD (inst->v, 29, 25) == 0x0
|
||||
&& G_FLD (inst->v, 6, 1) == 0x4
|
||||
&& G_FLD (inst->v, 19, 15) == 0x3)
|
||||
return 1; /* br r3 */
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
score_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc,
|
||||
struct frame_info *next_frame,
|
||||
struct score_frame_cache *this_cache)
|
||||
{
|
||||
CORE_ADDR sp;
|
||||
CORE_ADDR cur_pc = startaddr;
|
||||
|
||||
int sp_offset = 0;
|
||||
int ra_offset = 0;
|
||||
int fp_offset = 0;
|
||||
int ra_offset_p = 0;
|
||||
int fp_offset_p = 0;
|
||||
int inst_len = 0;
|
||||
|
||||
sp = frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM);
|
||||
|
||||
for (; cur_pc < pc; cur_pc += inst_len)
|
||||
{
|
||||
inst_t *inst = score_fetch_instruction (cur_pc);
|
||||
if (inst->is15 == 1)
|
||||
{
|
||||
inst_len = SCORE16_INSTLEN;
|
||||
|
||||
if (G_FLD (inst->v, 14, 12) == 0x2
|
||||
&& G_FLD (inst->v, 3, 0) == 0xe)
|
||||
{
|
||||
/* push! */
|
||||
sp_offset += 4;
|
||||
|
||||
if (G_FLD (inst->v, 11, 7) == 0x6
|
||||
&& ra_offset_p == 0)
|
||||
{
|
||||
/* push! r3, [r0] */
|
||||
ra_offset = sp_offset;
|
||||
ra_offset_p = 1;
|
||||
}
|
||||
else if (G_FLD (inst->v, 11, 7) == 0x4
|
||||
&& fp_offset_p == 0)
|
||||
{
|
||||
/* push! r2, [r0] */
|
||||
fp_offset = sp_offset;
|
||||
fp_offset_p = 1;
|
||||
}
|
||||
}
|
||||
else if (G_FLD (inst->v, 14, 12) == 0x2
|
||||
&& G_FLD (inst->v, 3, 0) == 0xa)
|
||||
{
|
||||
/* pop! */
|
||||
sp_offset -= 4;
|
||||
}
|
||||
else if (G_FLD (inst->v, 14, 7) == 0xc1
|
||||
&& G_FLD (inst->v, 2, 0) == 0x0)
|
||||
{
|
||||
/* subei! r0, n */
|
||||
sp_offset += (int) pow (2, G_FLD (inst->v, 6, 3));
|
||||
}
|
||||
else if (G_FLD (inst->v, 14, 7) == 0xc0
|
||||
&& G_FLD (inst->v, 2, 0) == 0x0)
|
||||
{
|
||||
/* addei! r0, n */
|
||||
sp_offset -= (int) pow (2, G_FLD (inst->v, 6, 3));
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
inst_len = SCORE_INSTLEN;
|
||||
|
||||
if (G_FLD (inst->v, 29, 15) == 0xc60
|
||||
&& G_FLD (inst->v, 2, 0) == 0x4)
|
||||
{
|
||||
/* sw r3, [r0, offset]+ */
|
||||
sp_offset += SCORE_INSTLEN;
|
||||
if (ra_offset_p == 0)
|
||||
{
|
||||
ra_offset = sp_offset;
|
||||
ra_offset_p = 1;
|
||||
}
|
||||
}
|
||||
if (G_FLD (inst->v, 29, 15) == 0xc40
|
||||
&& G_FLD (inst->v, 2, 0) == 0x4)
|
||||
{
|
||||
/* sw r2, [r0, offset]+ */
|
||||
sp_offset += SCORE_INSTLEN;
|
||||
if (fp_offset_p == 0)
|
||||
{
|
||||
fp_offset = sp_offset;
|
||||
fp_offset_p = 1;
|
||||
}
|
||||
}
|
||||
else if (G_FLD (inst->v, 29, 15) == 0x1c60
|
||||
&& G_FLD (inst->v, 2, 0) == 0x0)
|
||||
{
|
||||
/* lw r3, [r0]+, 4 */
|
||||
sp_offset -= SCORE_INSTLEN;
|
||||
ra_offset_p = 1;
|
||||
}
|
||||
else if (G_FLD (inst->v, 29, 15) == 0x1c40
|
||||
&& G_FLD (inst->v, 2, 0) == 0x0)
|
||||
{
|
||||
/* lw r2, [r0]+, 4 */
|
||||
sp_offset -= SCORE_INSTLEN;
|
||||
fp_offset_p = 1;
|
||||
}
|
||||
|
||||
else if (G_FLD (inst->v, 29, 17) == 0x100
|
||||
&& G_FLD (inst->v, 0, 0) == 0x0)
|
||||
{
|
||||
/* addi r0, -offset */
|
||||
sp_offset += 65536 - G_FLD (inst->v, 16, 1);
|
||||
}
|
||||
else if (G_FLD (inst->v, 29, 17) == 0x110
|
||||
&& G_FLD (inst->v, 0, 0) == 0x0)
|
||||
{
|
||||
/* addi r2, offset */
|
||||
if (pc - cur_pc > 4)
|
||||
{
|
||||
unsigned int save_v = inst->v;
|
||||
inst_t *inst2 =
|
||||
score_fetch_instruction (cur_pc + SCORE_INSTLEN);
|
||||
if (inst2->v == 0x23)
|
||||
/* mv! r0, r2 */
|
||||
sp_offset -= G_FLD (save_v, 16, 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Save RA. */
|
||||
if (ra_offset_p == 1)
|
||||
{
|
||||
if (this_cache->saved_regs[SCORE_PC_REGNUM].addr == -1)
|
||||
this_cache->saved_regs[SCORE_PC_REGNUM].addr =
|
||||
sp + sp_offset - ra_offset;
|
||||
}
|
||||
else
|
||||
{
|
||||
this_cache->saved_regs[SCORE_PC_REGNUM] =
|
||||
this_cache->saved_regs[SCORE_RA_REGNUM];
|
||||
}
|
||||
|
||||
/* Save FP. */
|
||||
if (fp_offset_p == 1)
|
||||
{
|
||||
if (this_cache->saved_regs[SCORE_FP_REGNUM].addr == -1)
|
||||
this_cache->saved_regs[SCORE_FP_REGNUM].addr =
|
||||
sp + sp_offset - fp_offset;
|
||||
}
|
||||
|
||||
/* Save SP. */
|
||||
this_cache->base =
|
||||
frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM) + sp_offset;
|
||||
}
|
||||
|
||||
static struct score_frame_cache *
|
||||
score_make_prologue_cache (struct frame_info *next_frame, void **this_cache)
|
||||
{
|
||||
struct score_frame_cache *cache;
|
||||
|
||||
if ((*this_cache) != NULL)
|
||||
return (*this_cache);
|
||||
|
||||
cache = FRAME_OBSTACK_ZALLOC (struct score_frame_cache);
|
||||
(*this_cache) = cache;
|
||||
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
|
||||
|
||||
/* Analyze the prologue. */
|
||||
{
|
||||
const CORE_ADDR pc = frame_pc_unwind (next_frame);
|
||||
CORE_ADDR start_addr;
|
||||
|
||||
find_pc_partial_function (pc, NULL, &start_addr, NULL);
|
||||
if (start_addr == 0)
|
||||
return cache;
|
||||
score_analyze_prologue (start_addr, pc, next_frame, *this_cache);
|
||||
}
|
||||
|
||||
/* Save SP. */
|
||||
trad_frame_set_value (cache->saved_regs, SCORE_SP_REGNUM, cache->base);
|
||||
|
||||
return (*this_cache);
|
||||
}
|
||||
|
||||
static void
|
||||
score_prologue_this_id (struct frame_info *next_frame, void **this_cache,
|
||||
struct frame_id *this_id)
|
||||
{
|
||||
struct score_frame_cache *info = score_make_prologue_cache (next_frame,
|
||||
this_cache);
|
||||
(*this_id) = frame_id_build (info->base, frame_func_unwind (next_frame));
|
||||
}
|
||||
|
||||
static void
|
||||
score_prologue_prev_register (struct frame_info *next_frame,
|
||||
void **this_cache,
|
||||
int regnum, int *optimizedp,
|
||||
enum lval_type *lvalp, CORE_ADDR * addrp,
|
||||
int *realnump, gdb_byte * valuep)
|
||||
{
|
||||
struct score_frame_cache *info = score_make_prologue_cache (next_frame,
|
||||
this_cache);
|
||||
trad_frame_get_prev_register (next_frame, info->saved_regs, regnum,
|
||||
optimizedp, lvalp, addrp, realnump, valuep);
|
||||
}
|
||||
|
||||
static const struct frame_unwind score_prologue_unwind =
|
||||
{
|
||||
NORMAL_FRAME,
|
||||
score_prologue_this_id,
|
||||
score_prologue_prev_register
|
||||
};
|
||||
|
||||
static const struct frame_unwind *
|
||||
score_prologue_sniffer (struct frame_info *next_frame)
|
||||
{
|
||||
return &score_prologue_unwind;
|
||||
}
|
||||
|
||||
static CORE_ADDR
|
||||
score_prologue_frame_base_address (struct frame_info *next_frame,
|
||||
void **this_cache)
|
||||
{
|
||||
struct score_frame_cache *info =
|
||||
score_make_prologue_cache (next_frame, this_cache);
|
||||
return info->base;
|
||||
}
|
||||
|
||||
static const struct frame_base score_prologue_frame_base =
|
||||
{
|
||||
&score_prologue_unwind,
|
||||
score_prologue_frame_base_address,
|
||||
score_prologue_frame_base_address,
|
||||
score_prologue_frame_base_address,
|
||||
};
|
||||
|
||||
static const struct frame_base *
|
||||
score_prologue_frame_base_sniffer (struct frame_info *next_frame)
|
||||
{
|
||||
return &score_prologue_frame_base;
|
||||
}
|
||||
|
||||
static struct gdbarch *
|
||||
score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
||||
{
|
||||
struct gdbarch *gdbarch;
|
||||
|
||||
arches = gdbarch_list_lookup_by_info (arches, &info);
|
||||
if (arches != NULL)
|
||||
{
|
||||
return (arches->gdbarch);
|
||||
}
|
||||
gdbarch = gdbarch_alloc (&info, 0);
|
||||
|
||||
set_gdbarch_short_bit (gdbarch, 16);
|
||||
set_gdbarch_int_bit (gdbarch, 32);
|
||||
set_gdbarch_float_bit (gdbarch, 32);
|
||||
set_gdbarch_double_bit (gdbarch, 64);
|
||||
set_gdbarch_long_double_bit (gdbarch, 64);
|
||||
set_gdbarch_register_sim_regno (gdbarch, score_register_sim_regno);
|
||||
set_gdbarch_pc_regnum (gdbarch, SCORE_PC_REGNUM);
|
||||
set_gdbarch_sp_regnum (gdbarch, SCORE_SP_REGNUM);
|
||||
set_gdbarch_num_regs (gdbarch, SCORE_NUM_REGS);
|
||||
set_gdbarch_register_name (gdbarch, score_register_name);
|
||||
set_gdbarch_breakpoint_from_pc (gdbarch, score_breakpoint_from_pc);
|
||||
set_gdbarch_register_type (gdbarch, score_register_type);
|
||||
set_gdbarch_frame_align (gdbarch, score_frame_align);
|
||||
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
|
||||
set_gdbarch_read_sp (gdbarch, score_read_sp);
|
||||
set_gdbarch_unwind_pc (gdbarch, score_unwind_pc);
|
||||
set_gdbarch_print_insn (gdbarch, score_print_insn);
|
||||
set_gdbarch_skip_prologue (gdbarch, score_skip_prologue);
|
||||
set_gdbarch_in_function_epilogue_p (gdbarch, score_in_function_epilogue_p);
|
||||
set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
|
||||
set_gdbarch_return_value (gdbarch, score_return_value);
|
||||
set_gdbarch_unwind_dummy_id (gdbarch, score_unwind_dummy_id);
|
||||
set_gdbarch_push_dummy_call (gdbarch, score_push_dummy_call);
|
||||
|
||||
frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
|
||||
frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
|
||||
frame_unwind_append_sniffer (gdbarch, score_prologue_sniffer);
|
||||
frame_base_append_sniffer (gdbarch, score_prologue_frame_base_sniffer);
|
||||
|
||||
return gdbarch;
|
||||
}
|
||||
|
||||
extern initialize_file_ftype _initialize_score_tdep;
|
||||
|
||||
void
|
||||
_initialize_score_tdep (void)
|
||||
{
|
||||
gdbarch_register (bfd_arch_score, score_gdbarch_init, NULL);
|
||||
}
|
||||
51
gdb/score-tdep.h
Normal file
51
gdb/score-tdep.h
Normal file
@ -0,0 +1,51 @@
|
||||
/* Target-dependent code for the S+core architecture, for GDB,
|
||||
the GNU Debugger.
|
||||
|
||||
Copyright (C) 2006
|
||||
Free Software Foundation, Inc.
|
||||
|
||||
Contributed by Qinwei (qinwei@sunnorth.com.cn)
|
||||
Contributed by Ching-Peng Lin (cplin@sunplus.com)
|
||||
|
||||
This file is part of GDB.
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
||||
Boston, MA 02110-1301, USA. */
|
||||
|
||||
#ifndef SCORE_TDEP_H
|
||||
#define SCORE_TDEP_H
|
||||
#include "math.h"
|
||||
|
||||
enum gdb_regnum
|
||||
{
|
||||
SCORE_SP_REGNUM = 0,
|
||||
SCORE_FP_REGNUM = 2,
|
||||
SCORE_RA_REGNUM = 3,
|
||||
SCORE_A0_REGNUM = 4,
|
||||
SCORE_AL_REGNUM = 7,
|
||||
SCORE_PC_REGNUM = 49,
|
||||
};
|
||||
|
||||
#define SCORE_A0_REGNUM 4
|
||||
#define SCORE_A1_REGNUM 5
|
||||
#define SCORE_REGSIZE 4
|
||||
#define SCORE_NUM_REGS 56
|
||||
#define SCORE_BEGIN_ARG_REGNUM 4
|
||||
#define SCORE_LAST_ARG_REGNUM 7
|
||||
|
||||
#define SCORE_INSTLEN 4
|
||||
#define SCORE16_INSTLEN 2
|
||||
|
||||
#endif /* SCORE_TDEP_H */
|
||||
Loading…
Reference in New Issue
Block a user