* frame.c (frame_unwind_register): Throw an error if unwinding the
register failed.
* get_prev_frame_1 (get_prev_frame_1): Ask the unwinder if there's
an unwind stop reason.
(frame_stop_reason_string): Handle UNWIND_UNAVAILABLE.
* frame.h (enum unwind_stop_reason) <UNWIND_OUTERMOST,
UNWIND_UNAVAILABLE>: New.
* inline-frame.c (inline_frame_unwind): Install
default_frame_unwind_stop_reason.
* frame-unwind.c: Include "exceptions.h".
(frame_unwind_find_by_frame): Swallow NOT_AVAILABLE_ERROR errors.
(default_frame_unwind_stop_reason): New.
* frame-unwind.h (frame_unwind_stop_reason_ftype): New typedef.
(default_frame_unwind_stop_reason): Declare.
(struct frame_unwind) <stop_reason>: New function pointer.
* dummy-frame.c: Install default_frame_unwind_stop_reason.
* dwarf2-frame.c: Include exceptions.h.
(struct dwarf2_frame_cache) <unavailable_retaddr>: New field.
(dwarf2_frame_cache): Swallow NOT_AVAILABLE_ERROR errors when
computing the CFA. If such an error was thrown, set
unavailable_retaddr.
(dwarf2_frame_unwind_stop_reason): New.
(dwarf2_frame_this_id): Don't build a frame id if the CFA was
unavailable.
(dwarf2_frame_unwind): Install dwarf2_frame_unwind_stop_reason.
(dwarf2_signal_frame_unwind): Ditto.
* amd64-tdep.c: Include "exceptions.h".
(struct amd64_frame_cache): New field "base_p".
(amd64_init_frame_cache): Clear it.
(amd64_frame_cache_1): New, factored out from amd64_frame_cache.
Avoid reading registers with functions that throw if the register
is not necessary to compute the frame base.
(amd64_frame_cache): Reimplement wrapping amd64_frame_cache_1, and
swallowing NOT_AVAILABLE_ERROR.
(amd64_frame_unwind_stop_reason): New.
(amd64_frame_this_id): Don't build a frame id if the frame base
was unavailable.
(amd64_frame_unwind): Install amd64_frame_unwind_stop_reason.
(amd64_sigtramp_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set
base_p if the frame base was computable.
(amd64_sigtramp_frame_unwind_stop_reason): New.
(amd64_sigtramp_frame_this_id): Don't build a frame id if the
frame base was unavailable.
(amd64_sigtramp_frame_unwind): Install
amd64_sigtramp_frame_unwind_stop_reason.
(amd64_epilogue_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set
base_p if the frame base was computable.
(amd64_epilogue_frame_unwind_stop_reason): New.
(amd64_epilogue_frame_this_id): Don't build a frame id if the
frame base was unavailable.
(amd64_epilogue_frame_unwind): Install
amd64_epilogue_frame_unwind_stop_reason.
* i386-tdep.c: Include "exceptions.h".
(struct i386_frame_cache): New field "base_p".
(i386_init_frame_cache): Clear it.
(i386_frame_cache_1): New, factored out from amd64_frame_cache.
Avoid reading registers with functions that throw if the register
is not necessary to compute the frame base.
(i386_frame_cache): Reimplement wrapping amd64_frame_cache_1, and
swallowing NOT_AVAILABLE_ERROR.
(i386_frame_unwind_stop_reason): New.
(i386_frame_this_id): Don't build a frame id if the frame base was
unavailable.
(i386_frame_prev_register): Handle unavailable SP.
(i386_frame_unwind): Install i386_frame_unwind_stop_reason.
(i386_epilogue_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set
base_p if the frame base was computable.
(i386_epilogue_frame_unwind_stop_reason): New.
(i386_epilogue_frame_this_id): Don't build a frame id if the frame
base was unavailable.
(i386_epilogue_frame_unwind): Install
i386_epilogue_frame_unwind_stop_reason.
(i386_sigtramp_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set
base_p if the frame base was computable.
(i386_sigtramp_frame_unwind_stop_reason): New.
(i386_sigtramp_frame_this_id): Don't build a frame id if the frame
base was unavailable.
(i386_sigtramp_frame_unwind): Install
i386_sigtramp_frame_unwind_stop_reason.
* sentinel-frame.c (sentinel_frame_prev_register): Use the value
type's size, not the register's.
(sentinel_frame_unwind): Install default_frame_unwind_stop_reason.
* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind): Install
default_frame_unwind_stop_reason.
* alpha-tdep.c (alpha_sigtramp_frame_unwind)
(alpha_heuristic_frame_unwind): Ditto.
* amd64obsd-tdep.c (amd64obsd_trapframe_unwind): Ditto.
* arm-tdep.c (arm_prologue_unwind, arm_stub_unwind): Ditto.
* avr-tdep.c (avr_frame_unwind): Ditto.
* cris-tdep.c (cris_sigtramp_frame_unwind, cris_frame_unwind):
Ditto.
* frv-linux-tdep.c (frv_linux_sigtramp_frame_unwind): Ditto.
* frv-tdep.c (frv_frame_unwind): Ditto.
* h8300-tdep.c (h8300_frame_unwind): Ditto.
* hppa-hpux-tdep.c (hppa_hpux_sigtramp_frame_unwind): Ditto.
* hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind): Ditto.
* hppa-tdep.c (hppa_frame_unwind, hppa_fallback_frame_unwind)
(hppa_stub_frame_unwind): Ditto.
* i386obsd-tdep.c (i386obsd_trapframe_unwind): Ditto.
* ia64-tdep.c (ia64_frame_unwind, ia64_sigtramp_frame_unwind)
(ia64_libunwind_frame_unwind)
(ia64_libunwind_sigtramp_frame_unwind): Ditto.
* iq2000-tdep.c (iq2000_frame_unwind): Ditto.
* lm32-tdep.c (lm32_frame_unwind): Ditto.
* m32c-tdep.c (m32c_unwind): Ditto.
* m32r-linux-tdep.c (m32r_linux_sigtramp_frame_unwind): Ditto.
* m32r-tdep.c (m32r_frame_unwind): Ditto.
* m68hc11-tdep.c (m68hc11_frame_unwind): Ditto.
* m68k-tdep.c (m68k_frame_unwind): Ditto.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_unwind): Ditto.
* m88k-tdep.c (m88k_frame_unwind): Ditto.
* mep-tdep.c (mep_frame_unwind): Ditto.
* microblaze-tdep.c (microblaze_frame_unwind): Ditto.
* mips-tdep.c (mips_insn16_frame_unwind, mips_insn32_frame_unwind)
(mips_stub_frame_unwind): Ditto.
* mn10300-tdep.c (mn10300_frame_unwind): Ditto.
* moxie-tdep.c (moxie_frame_unwind): Ditto.
* mt-tdep.c (mt_frame_unwind): Ditto.
* ppc-linux-tdep.c (ppu2spu_unwind): Ditto.
* ppcobsd-tdep.c (ppcobsd_sigtramp_frame_unwind): Ditto.
* rs6000-tdep.c (rs6000_frame_unwind): Ditto.
* s390-tdep.c (s390_frame_unwind, s390_stub_frame_unwind)
(s390_sigtramp_frame_unwind): Ditto.
* score-tdep.c (score_prologue_unwind): Ditto.
* sh-tdep.c (sh_frame_unwind): Ditto.
* sh64-tdep.c (sh64_frame_unwind): Ditto.
* sparc-sol2-tdep.c (sparc32_sol2_sigtramp_frame_unwind): Ditto.
* sparc-tdep.c (sparc32_frame_unwind): Ditto.
* sparc64-sol2-tdep.c (sparc64_sol2_sigtramp_frame_unwind): Ditto.
* sparc64-tdep.c (sparc64_frame_unwind): Ditto.
* sparc64fbsd-tdep.c (sparc64fbsd_sigtramp_frame_unwind): Ditto.
* sparc64nbsd-tdep.c (sparc64nbsd_sigcontext_frame_unwind): Ditto.
* sparc64obsd-tdep.c (sparc64obsd_frame_unwind)
(sparc64obsd_trapframe_unwind): Ditto.
* sparcnbsd-tdep.c (sparc32nbsd_sigcontext_frame_unwind): Ditto.
* sparcobsd-tdep.c (sparc32obsd_sigtramp_frame_unwind): Ditto.
* spu-tdep.c (spu_frame_unwind, spu2ppu_unwind): Ditto.
* v850-tdep.c (v850_frame_unwind): Ditto.
* vax-tdep.c (vax_frame_unwind): Ditto.
* vaxobsd-tdep.c (vaxobsd_sigtramp_frame_unwind): Ditto.
* xstormy16-tdep.c (frame_unwind xstormy16_frame_unwind): Ditto.
* xtensa-tdep.c (xtensa_unwind): Ditto.
* regcache.h (regcache_raw_read, regcache_raw_read_signed)
(regcache_raw_read_unsigned, regcache_raw_read_signed)
(regcache_raw_read_unsigned, regcache_raw_read_part)
(regcache_cooked_read, regcache_cooked_read_signed)
(regcache_cooked_read_unsigned, regcache_cooked_read_part)
(regcache_cooked_read_ftype): Change return to enum
register_status.
* regcache.c: Include exceptions.h
(regcache_save): Adjust to handle REG_UNAVAILABLE registers.
(do_cooked_read): Change return to enum register_status. Always
forward to regcache_cooked_read.
(regcache_raw_read): Change return to enum register_status. If
the register is not REG_VALID, memset the buffer. Return the
register's status.
(regcache_raw_read_signed): Handle non-REG_VALID registers and
return the register's status.
(regcache_raw_read_unsigned): Ditto.
(regcache_cooked_read): Change return to enum register_status.
Assert that with read-only regcaches, the register's status must
be known. If the regcache is read-only, and the register is not
REG_VALID, memset the buffer. Return the register's status.
(regcache_cooked_read_signed): Change return to enum
register_status. Handle non-REG_VALID registers and return the
register's status.
(regcache_cooked_read_unsigned): Change return to enum
register_status. Handle non-REG_VALID registers and return the
register's status.
(regcache_xfer_part, regcache_raw_read_part)
(regcache_cooked_read_part): Change return to enum
register_status. Return the register's status.
(regcache_read_pc): Throw NOT_AVAILABLE_ERROR if the register is
unavailable.
(regcache_dump): Handle unavailable cooked registers.
* frame.c (do_frame_register_read): Adjust interface to match
regcache_cooked_read_ftype.
* gdbarch.sh (pseudo_register_read): Change return to enum
register_status.
* gdbarch.h, gdbarch.c: Regenerate.
* i386-tdep.h (i386_pseudo_register_read): Change return to enum
register_status.
* i386-tdep.c (i386_pseudo_register_read): Change return to enum
register_status. If reading a raw register indicates the raw
register is not valid, return the raw register's status,
otherwise, return REG_VALID.
* amd64-tdep.c (amd64_pseudo_register_read): Change return to enum
register_status. Handle non-REG_VALID raw registers and return
the register's status.
* arm-tdep.c (arm_neon_quad_read)
(arm_pseudo_read): Change return to enum register_status. Handle
non-REG_VALID raw registers and return the register's status.
* avr-tdep.c (avr_pseudo_register_read): Ditto.
* frv-tdep.c (frv_pseudo_register_read): Ditto.
* h8300-tdep.c (h8300_pseudo_register_read): Ditto.
* hppa-tdep.c (hppa_pseudo_register_read): Ditto.
* m32c-tdep.c (m32c_move_reg_t): Change return to enum
register_status.
(m32c_raw_read, m32c_raw_write, m32c_banked_read)
(m32c_banked_write, m32c_sb_read, m32c_sb_write, m32c_part_read)
(m32c_part_write, m32c_cat_read, m32c_cat_write)
(m32c_r3r2r1r0_read, m32c_r3r2r1r0_write)
(m32c_pseudo_register_read): Change return to enum
register_status. Adjust.
* m68hc11-tdep.c (m68hc11_pseudo_register_read): Change return to
enum register_status. Return the register's status.
* mep-tdep.c (mep_pseudo_cr32_read): Change return to enum
register_status. Return the register's status.
(mep_pseudo_cr64_read, mep_pseudo_register_read): Ditto.
* mips-tdep.c (mips_pseudo_register_read): Ditto.
* mt-tdep.c (mt_pseudo_register_read): Ditto.
* rs6000-tdep.c (move_ev_register_func): New typedef.
(e500_move_ev_register): Use it. Change return to enum
register_status. Return the register's status.
(do_regcache_raw_read): New function.
(do_regcache_raw_write): New function.
(e500_pseudo_register_read): Change return to enum
register_status. Return the register's status. Use
do_regcache_raw_read.
(e500_pseudo_register_write): Adjust. Use do_regcache_raw_write.
(dfp_pseudo_register_read): Change return to enum register_status.
Return the register's status.
(vsx_pseudo_register_read): Ditto.
(efpr_pseudo_register_read): Ditto.
(rs6000_pseudo_register_read): Ditto.
* s390-tdep.c (s390_pseudo_register_read): Change return to enum
register_status. Return the register's status.
* sh64-tdep.c (pseudo_register_read_portions): New function.
(sh64_pseudo_register_read): Change return to enum
register_status. Use pseudo_register_read_portions. Return the
register's status.
* ia64-tdep.c (ia64_pseudo_register_read): Change return to enum
register_status. Return the register's status.
* sh-tdep.c (pseudo_register_read_portions): New function.
(sh_pseudo_register_read): Change return to enum register_status.
Use pseudo_register_read_portions. Return the register's status.
* sparc-tdep.c (sparc32_pseudo_register_read): Change return to
enum register_status. Return the register's status.
* sparc64-tdep.c (sparc64_pseudo_register_read): Ditto.
* spu-tdep.c (spu_pseudo_register_read_spu)
(spu_pseudo_register_read): Ditto.
* xtensa-tdep.c (xtensa_register_read_masked)
(xtensa_pseudo_register_read): Ditto.
* bfin-tdep.c (bfin_pseudo_register_read): Ditto.
* arm-tdep.h (struct displaced_step_closure): Add two new fields
is_thumb and insn_size.
* arm-tdep.c (displaced_read_reg): Adjust correct pipeline offset
on both ARM and Thumb mode.
(arm_process_displaced_insn): Set is_thumb and insn_size.
(arm_displaced_init_closure): Handle both 16-bit and 32-bit.
(arm_displaced_step_fixup): Likewise.
(arm_linux_restart_syscall_init): Handle both on-stack and in-kernel
versions of the trampoline. Handle Thumb vs. ARM addresses.
(arm_kernel_linux_restart_syscall_tramp_frame): New global.
(arm_linux_init_abi): Install it.
* arm-tdep.c (arm_psr_thumb_bit): Make global.
* arm-tdep.c (arm_psr_thumb_bit): Add prototype.
PR tdep/12352
* arm-tdep.c (copy_ldr_str_ldrb_strb): Replace PC with SP in
order to store PC value on stack instead of text section.
2011-02-15 Yao Qi <yao@codesourcery.com>
PR tdep/12352
* gdb.arch/arm-disp-step.S : New test for str instruction.
* gdb.arch/arm-disp-step.exp : Likewise
arguments. Skip in-prologue calls to glibc __aeabi_read_tp
implementation even if no symbols are available.
(thumb_analyze_prologue): Update call to skip_prologue_function.
(arm_analyze_prologue): Likewise.
(arm_prologue_this_id): Use frame PC if get_frame_func returns 0.
(arm_exidx_data_key): New static variable.
(struct arm_exidx_entry, arm_exidx_entry_s): New data types.
(struct arm_exidx_data): Likewise.
(arm_exidx_data_free): New function.
(arm_compare_exidx_entries): Likewise.
(arm_obj_section_from_vma): Likewise.
(arm_exidx_new_objfile): Likewise.
(arm_find_exidx_entry): Likewise.
(arm_exidx_fill_cache): Likewise.
(arm_exidx_unwind_sniffer): Likewise.
(arm_exidx_unwind): New global variable.
(arm_gdbarch_init): Append unwinder arm_exidx_unwind.
(_initialize_arm_tdep): Attach arm_exidx_new_objfile to new_objfile
observer. Register arm_exidx_data_key as objfile data.
(thumb_instruction_changes_pc): Likewise.
(thumb2_instruction_changes_pc): Likewise.
(thumb_analyze_prologue): Handle 32-bit Thumb instructions during
prologue parsing. Improved support for optimized code.
(thumb_scan_prologue): Do not reply on line-number information,
use same heuristics as arm_scan_prologue insead.
(skip_prologue_function): Accept functions
"__tls_get_addr" and "__aeabi_read_tp".
* arm-linux-tdep.c (arm_linux_sigreturn_return_addr): New.
(arm_linux_syscall_next_pc): New.
(arm_linux_copy_svc): Use arm_linux_sigreturn_return_addr instead.
(arm_linux_init_abi): Initialize syscall_next_pc.
* arm-tdep.c (thumb_get_next_pc_raw): Get next pc of SWI in Thumb mode.
(arm_get_next_pc_raw): Get next pc of SWI in ARM mode.
* arm-tdep.h (struct gdbarch_tdep): Add a function pointer syscall_next_pc.
Declare arm_frame_is_thumb.
(arm_psr_thumb_bit): New. Update all uses of CPSR_T to
call this function.
(arm_pc_is_thumb): Add a gdbarch argument. Update all callers.
Check is_m after force-mode.
(arm_gdbarch_init): Check the binary before the target description.
Add check for M profile attribute. If we have an M-profile device,
but no target register description, use arm-with-m. Recognize the
new org.gnu.gdb.arm.m-profile feature and its xpsr register.
(_initialize_arm_tdep): Call initialize_tdesc_arm_with_m.
* arm-tdep.h (XPSR_T): Define.
(struct gdbarch_tdep): Add is_m member.
* features/arm-m-profile.xml, features/arm-with-m.c,
features/arm-with-m.xml: New files.
doc/
* gdb.texinfo (ARM Features): Document
org.gnu.gdb.arm.m-profile.
(submask, bit, bits, sbits, BranchDest): Move higher in the file.
(thumb_analyze_prologue): Document return value. Recognize more
Thumb instructions, skippable calls, and some Thumb-2 instructions.
Add debug output.
(arm_skip_prologue): Remove call dummy check. Check the prologue
for non-GNU compilers.
(arm_instruction_changes_pc): New function.
(arm_analyze_prologue): New function, broken out from
arm_scan_prologue. Recognize more ARM instructions and skippable
calls. Update comments. Handle NULL cache. Return the address
of the first unrecognized instruction. Do not skip past other
instructions which change control flow. Add debug output.
(arm_scan_prologue): Use arm_analyze_prologue.
(ARM_PC_32): Delete.
(shifted_reg_val): Simplify ARM_PC_32 check.
* arm-tdep.c (arm_pc_is_thumb): Add heuristic that tries to get
the state right when single stepping.
(arm_get_next_pc_raw, thumb_get_next_pc_raw): New functions.
Get the next PC along with the instruction state.
(thumb_get_next_pc): Remove.
(arm_get_next_pc): Modified to use arm_get_next_pc_raw.
Ulrich Weigand
Yao Qi
Tom Tromey
Pedro Alves
Michael Snyder
Joel Brobecker
Pierre Muller
Matthew Gretton-Dann
Daniel Jacobowitz
Richard Earnshaw
Doug Evans