* 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.
instead of "Linux 2.6.19" in comment.
(linux_xfer_partial): Use "GNU/Linux target" instead of
"Linux target" in comment.
* m68klinux-tdep.c (m68k_linux_inferior_created): Likewise.
(m68k_linux_get_sigtramp_info): Likewise.
* m68k-tdep.c (m68k_register_to_value, m68k_value_to_register)
(m68k_svr4_extract_return_value, m68k_svr4_store_return_value)
(m68k_frame_prev_register, m68k_get_longjmp_target): Use
get_regcache_arch or get_frame_arch to get at the current architecture
by regcache or by frame, respectively.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise.
* m68klinux-nat.c (fetch_register, old_fetch_inferior_registers)
(store_register, old_store_inferior_registers, supply_gregset)
(supply_fpregset, fill_fpregset): Likewise.
* m68k-tdep.c (m68k_register_type, m68k_unwind_pc, m68k_dump_tdep):
Replace current_gdbarch by gdbarch.
* m68klinux-tdep.c (m68k_uclinux_sigcontext_reg_offset): New.
(m68k_linux_sigcontext_reg_offset): Fix typo.
(target_is_uclinux): New.
(m68k_linux_inferior_created): New.
(m68k_linux_get_sigtramp_info): Check for uClinux or
normal Linux. Use m68k_uclinux_sigcontext_reg_offset for
uClinux.
(_initialize_m68k_linux_tdep): Register
m68k_linux_inferior_created.
struct_value_regnum.
(m68k_svr4_init_abi): New prototype.
* m68k-tdep.c: Include "floatformat.h". Add comment about all the
different calling conventions.
(m68k_extract_return_value): Remove code dealing with single-field
structs.
(m68k_store_return_value): Remove code dealing with single-field
structs. Correctly store return values of 5, 6, 7 or 8 bytes.
(m68k_extract_struct_value_address): Remove function.
(m68k_svr4_extract_return_value,m68k_svr4_store_return_value)
(m68k_reg_struct_return_p, m68k_return_value)
(m68k_svr4_return_value): New functions.
(m68k_use_struct_convention): Remove function.
(m68k_push_dummy_call): Use new struct_value_regnum member of
`struct gdbarch_tdep' instead of hardcoded register number to
store STRUCT_ADDR.
(m68k_svr4_init_abi): New function.
(m68k_gdbarch_init): Don't set extract_return_value,
store_return_values, deprecated_extract_struct_value_address and
use_struct_convention. Set return_value instead. Initialize new
struct_value_regnum member of `struct gdbarch_tdep'.
* m68klinux-tdep.c: Update copyright year.
(m68k_linux_extract_return_value, m68k_linux_store_return_value)
(m68k_linux_extract_struct_value_address): Remove function.
(m68k_linux_init_abi): Don't set extract_return_value,
store_return_values, deprecated_extract_struct_value_address and
use_struct_convention. Call m68k_svr4_init_abi but override the
new struct_value_regnum member of `struct gdbarch_tdep'.
* Makefile.in (m68k-tdep.o): Update dependencies.
* Makefile.in (m68klinux-nat.o): Update dependencies.
* m68klinux-tdep.c: Include "trad-frame.h" and "frame-unwind.h".
(m68k_linux_sigtramp_frame_cache)
(m68k_linux_sigtramp_frame_this_id)
(m68k_linux_sigtramp_frame_prev_register)
(m68k_linux_sigtramp_frame_unwind)
(m68k_linux_sigtramp_frame_sniffer)
(struct m68k_linux_sigtramp_info, m68k_linux_init_abi): Code from
m68k-tdep.h and m68k-tdep.c, add "linux" to function and variable
names, use trad-frame.h.
* m68k-tdep.h (struct gdbarch_tdep): Delete get_sigtramp_info.
(struct m68k_sigtramp_info): Delete.
* m68k-tdep.c (m68k_sigtramp_frame_cache)
(m68k_sigtramp_frame_this_id, m68k_sigtramp_frame_prev_register)
(m68k_sigtramp_frame_unwind, m68k_sigtramp_frame_sniffer)
(m68k_gdbarch_init): Delete all the sigtramp code, moved to
"m68klinux-tdep.c".
(struct gdbarch_tdep): Add struct_return.
* m68k-tdep.c (m68k_push_dummy_call): Non-scalars bigger than 4
bytes are padded to the right, not to the left. Pass struct value
address in register %a1, not on stack.
(m68k_use_struct_convention): New function.
(m68k_gdbarch_init): Set use_struct_convention. Initialize
struct_return in tdep to pcc_struct_return.
* m68klinux-tdep.c (m68k_linux_init_abi): Set struct_return to
reg_struct_return.
dependencies.
* config/m68k/tm-linux.h (DEPRECATED_EXTRACT_RETURN_VALUE): Define
as m68k_linux_extract_return_value.
(DEPRECATED_STORE_RETURN_VALUE): Define as
m68k_linux_store_return_value.
(DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS): Define as
m68k_linux_extract_struct_value_address.
* m68klinux-tdep.c (m68k_linux_sigtramp_saved_pc): Use
get_next_frame, get_frame_base, get_frame_pc.
(m68k_linux_frame_saved_pc): Use get_frame_base.
(m68k_linux_extract_return_value): New function.
(m68k_linux_store_return_value): New function.
(m68k_linux_extract_struct_value_address): New function.
* config/m68k/tm-m68k.h: Declare m68k_get_longjmp_target.
(altos_skip_prologue, delta68_frame_saved_pc, isi_frame_num_args)
(delta68_frame_num_args, news_frame_num_args, m68k_skip_prologue)
(m68k_frame_init_saved_regs, m68k_saved_pc_after_call): Use
read_memory_unsigned_integer instead of read_memory_integer when
dealing with addresses and instruction opcodes.
* m68klinux-tdep.c (m68k_linux_sigtramp_saved_pc)
(m68k_linux_frame_saved_pc): Likewise.
