This patch makes GDBserver support multi-process + biarch.
Currently, if you're debugging more than one process at once with a
single gdbserver (in extended-remote mode), then all processes must
have the same architecture (e.g., 64-bit vs 32-bit). Otherwise, you
see this:
Added inferior 2
[Switching to inferior 2 [<null>] (<noexec>)]
Reading symbols from /home/pedro/gdb/tests/main32...done.
Temporary breakpoint 2 at 0x4004cf: main. (2 locations)
Starting program: /home/pedro/gdb/tests/main32
warning: Selected architecture i386 is not compatible with reported target architecture i386:x86-64
warning: Architecture rejected target-supplied description
Remote 'g' packet reply is too long: 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000090cfffff0000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000000000b042f7460000000000020000230000002b0000002b0000002b000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000007f03000000000000ffff0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000801f00003b0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
... etc, etc ...
Even though the process was running a 32-bit program, GDBserver sent
back to GDB a register set in 64-bit layout.
A patch (http://sourceware.org/ml/gdb-patches/2012-11/msg00228.html) a
while ago made GDB track a target_gdbarch per inferior, and as
consequence, fetch a target description per-inferior. This patch is
the GDBserver counterpart, that makes GDBserver keep track of each
process'es XML target description and register layout. So in the
example above, GDBserver will send the correct register set in 32-bit
layout to GDB.
A new "struct target_desc" object (tdesc for short) is added, that
holds the target description and register layout information about
each process. Each `struct process_info' holds a pointer to a target
description. The regcache also gains a pointer to a target
description, mainly for convenience, and parallel with GDB (and
possible future support for programs that flip processor modes).
The low target's arch_setup routines are responsible for setting the
process'es correct tdesc. This isn't that much different to how
things were done before, except that instead of detecting the inferior
process'es architecture and calling the corresponding
init_registers_FOO routine, which would change the regcache layout
globals and recreate the threads' regcaches, the regcache.c globals
are gone, and the init_registers_$BAR routines now each initialize a
separate global struct target_desc object (one for each arch variant
GDBserver supports), and so all the init_registers_$BAR routines that
are built into GDBserver are called early at GDBserver startup time
(similarly to how GDB handles its built-in target descriptions), and
then the arch_setup routine is responsible for making
process_info->tdesc point to one of these target description globals.
The regcache module is all parameterized to get the regcache's layout
from the tdesc object instead of the old register_bytes, etc. globals.
The threads' regcaches are now created lazily. The old scheme where
we created each of them when we added a new thread doesn't work
anymore, because we add the main thread/lwp before we see it stop for
the first time, and it is only when we see the thread stop for the
first time that we have a chance of determining the inferior's
architecture (through the_low_target.arch_setup). Therefore when we
add the main thread we don't know which architecture/tdesc its
regcache should have.
This patch makes the gdb.multi/multi-arch.exp test now pass against
(extended-remote) GDBserver. It currently fails, without this patch.
The IPA also uses the regcache, so it gains a new global struct
target_desc pointer, which points at the description of the process it
is loaded in.
Re. the linux-low.c & friends changes. Since the register map
etc. may differ between processes (64-bit vs 32-bit) etc., the
linux_target_ops num_regs, regmap and regset_bitmap data fields are no
longer sufficient. A new method is added in their place that returns
a pointer to a new struct that includes all info linux-low.c needs to
access registers of the current inferior.
The patch/discussion that originally introduced
linux-low.c:disabled_regsets mentions that the disabled_regsets set
may be different per mode (in a biarch setup), and indeed that is
cleared whenever we start a new (first) inferior, so that global is
moved as well behind the new `struct regs_info'.
On the x86 side:
I simply replaced the i387-fp.c:num_xmm_registers global with a check
for 64-bit or 32-bit process, which is equivalent to how the global
was set. This avoided coming up with some more general mechanism that
would work for all targets that use this module (GNU/Linux, Windows,
etc.).
Tested:
GNU/Linux IA64
GNU/Linux MIPS64
GNU/Linux PowerPC (Fedora 16)
GNU/Linux s390x (Fedora 16)
GNU/Linux sparc64 (Debian)
GNU/Linux x86_64, -m64 and -m32 (Fedora 17)
Cross built, and smoke tested:
i686-w64-mingw32, under Wine.
GNU/Linux TI C6x, by Yao Qi.
Cross built but otherwise not tested:
aarch64-linux-gnu
arm-linux-gnu
m68k-linux
nios2-linux-gnu
sh-linux-gnu
spu
tilegx-unknown-linux-gnu
Completely untested:
GNU/Linux Blackfin
GNU/Linux CRIS
GNU/Linux CRISv32
GNU/Linux TI Xtensa
GNU/Linux M32R
LynxOS
QNX NTO
gdb/gdbserver/
2013-06-07 Pedro Alves <palves@redhat.com>
* Makefile.in (OBS): Add tdesc.o.
(IPA_OBJS): Add tdesc-ipa.o.
(tdesc-ipa.o): New rule.
* ax.c (gdb_eval_agent_expr): Adjust register_size call to new
interface.
* linux-low.c (new_inferior): Delete.
(disabled_regsets, num_regsets): Delete.
(linux_add_process): Adjust to set the new per-process
new_inferior flag.
(linux_detach_one_lwp): Adjust to call regcache_invalidate_thread.
(linux_wait_for_lwp): Adjust. Only call arch_setup if the event
was a stop. When calling arch_setup, switch the current inferior
to the thread that got an event.
(linux_resume_one_lwp): Adjust to call regcache_invalidate_thread.
(regsets_fetch_inferior_registers)
(regsets_store_inferior_registers): New regsets_info parameter.
Adjust to use it.
(linux_register_in_regsets): New regs_info parameter. Adjust to
use it.
(register_addr, fetch_register, store_register): New usrregs_info
parameter. Adjust to use it.
(usr_fetch_inferior_registers, usr_store_inferior_registers): New
parameter regs_info. Adjust to use it.
(linux_fetch_registers): Get the current inferior's regs_info, and
adjust to use it.
(linux_store_registers): Ditto.
[HAVE_LINUX_REGSETS] (initialize_regsets_info): New.
(initialize_low): Don't initialize the target_regsets here. Call
initialize_low_arch.
* linux-low.h (target_regsets): Delete declaration.
(struct regsets_info): New.
(struct usrregs_info): New.
(struct regs_info): New.
(struct process_info_private) <new_inferior>: New field.
(struct linux_target_ops): Delete the num_regs, regmap, and
regset_bitmap fields. New field regs_info.
[HAVE_LINUX_REGSETS] (initialize_regsets_info): Declare.
* i387-fp.c (num_xmm_registers): Delete.
(i387_cache_to_fsave, i387_fsave_to_cache): Adjust find_regno
calls to new interface.
(i387_cache_to_fxsave, i387_cache_to_xsave, i387_fxsave_to_cache)
(i387_xsave_to_cache): Adjust find_regno calls to new interface.
Infer the number of xmm registers from the regcache's target
description.
* i387-fp.h (num_xmm_registers): Delete.
* inferiors.c (add_thread): Don't install the thread's regcache
here.
* proc-service.c (gregset_info): Fetch the current inferior's
regs_info. Adjust to use it.
* regcache.c: Include tdesc.h.
(register_bytes, reg_defs, num_registers)
(gdbserver_expedite_regs): Delete.
(get_thread_regcache): If the thread doesn't have a regcache yet,
create one, instead of aborting gdbserver.
(regcache_invalidate_one): Rename to ...
(regcache_invalidate_thread): ... this.
(regcache_invalidate_one): New.
(regcache_invalidate): Only invalidate registers of the current
process.
(init_register_cache): Add target_desc parameter, and use it.
(new_register_cache): Ditto. Assert the target description has a
non zero registers_size.
(regcache_cpy): Add assertions. Adjust.
(realloc_register_cache, set_register_cache): Delete.
(registers_to_string, registers_from_string): Adjust.
(find_register_by_name, find_regno, find_register_by_number)
(register_cache_size): Add target_desc parameter, and use it.
(free_register_cache_thread, free_register_cache_thread_one)
(regcache_release, register_cache_size): New.
(register_size): Add target_desc parameter, and use it.
(register_data, supply_register, supply_register_zeroed)
(supply_regblock, supply_register_by_name, collect_register)
(collect_register_as_string, collect_register_by_name): Adjust.
* regcache.h (struct target_desc): Forward declare.
(struct regcache) <tdesc>: New field.
(init_register_cache, new_register_cache): Add target_desc
parameter.
(regcache_invalidate_thread): Declare.
(regcache_invalidate_one): Delete declaration.
(regcache_release): Declare.
(find_register_by_number, register_cache_size, register_size)
(find_regno): Add target_desc parameter.
(gdbserver_expedite_regs, gdbserver_xmltarget): Delete
declarations.
* remote-utils.c: Include tdesc.h.
(outreg, prepare_resume_reply): Adjust.
* server.c: Include tdesc.h.
(gdbserver_xmltarget): Delete declaration.
(get_features_xml, process_serial_event): Adjust.
* server.h [IN_PROCESS_AGENT] (struct target_desc): Forward
declare.
(struct process_info) <tdesc>: New field.
(ipa_tdesc): Declare.
* tdesc.c: New file.
* tdesc.h: New file.
* tracepoint.c: Include tdesc.h.
[IN_PROCESS_AGENT] (ipa_tdesc): Define.
(get_context_regcache): Adjust to pass ipa_tdesc down.
(do_action_at_tracepoint): Adjust to get the register cache size
from the context regcache's description.
(traceframe_walk_blocks): Adjust to get the register cache size
from the current trace frame's description.
(traceframe_get_pc): Adjust to get current trace frame's
description and pass it down.
(gdb_collect): Adjust to get the register cache size from the
IPA's description.
* linux-amd64-ipa.c (tdesc_amd64_linux): Declare.
(gdbserver_xmltarget): Delete.
(initialize_low_tracepoint): Set the ipa's target description.
* linux-i386-ipa.c (tdesc_i386_linux): Declare.
(initialize_low_tracepoint): Set the ipa's target description.
* linux-x86-low.c: Include tdesc.h.
[__x86_64__] (is_64bit_tdesc): New.
(ps_get_thread_area, x86_get_thread_area): Use it.
(i386_cannot_store_register): Rename to ...
(x86_cannot_store_register): ... this. Use is_64bit_tdesc.
(i386_cannot_fetch_register): Rename to ...
(x86_cannot_fetch_register): ... this. Use is_64bit_tdesc.
(x86_fill_gregset, x86_store_gregset): Adjust register_size calls
to new interface.
(target_regsets): Rename to ...
(x86_regsets): ... this.
(x86_get_pc, x86_set_pc): Adjust register_size calls to new
interface.
(x86_siginfo_fixup): Use is_64bit_tdesc.
[__x86_64__] (tdesc_amd64_linux, tdesc_amd64_avx_linux)
(tdesc_x32_avx_linux, tdesc_x32_linux)
(tdesc_i386_linux, tdesc_i386_mmx_linux, tdesc_i386_avx_linux):
Declare.
(x86_linux_update_xmltarget): Delete.
(I386_LINUX_XSAVE_XCR0_OFFSET): Define.
(have_ptrace_getfpxregs, have_ptrace_getregset): New.
(AMD64_LINUX_USER64_CS): New.
(x86_linux_read_description): New, based on
x86_linux_update_xmltarget.
(same_process_callback): New.
(x86_arch_setup_process_callback): New.
(x86_linux_update_xmltarget): New.
(x86_regsets_info): New.
(amd64_linux_regs_info): New.
(i386_linux_usrregs_info): New.
(i386_linux_regs_info): New.
(x86_linux_regs_info): New.
(x86_arch_setup): Reimplement.
(x86_install_fast_tracepoint_jump_pad): Use is_64bit_tdesc.
(x86_emit_ops): Ditto.
(the_low_target): Adjust. Install x86_linux_regs_info,
x86_cannot_fetch_register, and x86_cannot_store_register.
(initialize_low_arch): New.
* linux-ia64-low.c (tdesc_ia64): Declare.
(ia64_fetch_register): Adjust.
(ia64_usrregs_info, regs_info): New globals.
(ia64_regs_info): New function.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-sparc-low.c (tdesc_sparc64): Declare.
(sparc_fill_gregset_to_stack, sparc_store_gregset_from_stack):
Adjust.
(sparc_arch_setup): New function.
(sparc_regsets_info, sparc_usrregs_info, regs_info): New globals.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-ppc-low.c (tdesc_powerpc_32l, tdesc_powerpc_altivec32l)
(tdesc_powerpc_cell32l, tdesc_powerpc_vsx32l)
(tdesc_powerpc_isa205_32l, tdesc_powerpc_isa205_altivec32l)
(tdesc_powerpc_isa205_vsx32l, tdesc_powerpc_e500l)
(tdesc_powerpc_64l, tdesc_powerpc_altivec64l)
(tdesc_powerpc_cell64l, tdesc_powerpc_vsx64l)
(tdesc_powerpc_isa205_64l, tdesc_powerpc_isa205_altivec64l)
(tdesc_powerpc_isa205_vsx64l): Declare.
(ppc_cannot_store_register, ppc_collect_ptrace_register)
(ppc_supply_ptrace_register, parse_spufs_run, ppc_get_pc)
(ppc_set_pc, ppc_get_hwcap): Adjust.
(ppc_usrregs_info): Forward declare.
(!__powerpc64__) ppc_regmap_adjusted: New global.
(ppc_arch_setup): Adjust to the current process'es target
description.
(ppc_fill_vsxregset, ppc_store_vsxregset, ppc_fill_vrregset)
(ppc_store_vrregset, ppc_fill_evrregset, ppc_store_evrregse)
(ppc_store_evrregset): Adjust.
(target_regsets): Rename to ...
(ppc_regsets): ... this, and make static.
(ppc_usrregs_info, ppc_regsets_info, regs_info): New globals.
(ppc_regs_info): New function.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-s390-low.c (tdesc_s390_linux32, tdesc_s390_linux32v1)
(tdesc_s390_linux32v2, tdesc_s390_linux64, tdesc_s390_linux64v1)
(tdesc_s390_linux64v2, tdesc_s390x_linux64, tdesc_s390x_linux64v1)
(tdesc_s390x_linux64v2): Declare.
(s390_collect_ptrace_register, s390_supply_ptrace_register)
(s390_fill_gregset, s390_store_last_break): Adjust.
(target_regsets): Rename to ...
(s390_regsets): ... this, and make static.
(s390_get_pc, s390_set_pc): Adjust.
(s390_get_hwcap): New target_desc parameter, and use it.
[__s390x__] (have_hwcap_s390_high_gprs): New global.
(s390_arch_setup): Adjust to set the current process'es target
description. Don't adjust the regmap.
(s390_usrregs_info, s390_regsets_info, regs_info): New globals.
[__s390x__] (s390_usrregs_info_3264, s390_regsets_info_3264)
(regs_info_3264): New globals.
(s390_regs_info): New function.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-mips-low.c (tdesc_mips_linux, tdesc_mips_dsp_linux)
(tdesc_mips64_linux, tdesc_mips64_dsp_linux): Declare.
[__mips64] (init_registers_mips_linux)
(init_registers_mips_dsp_linux): Delete defines.
[__mips64] (tdesc_mips_linux, tdesc_mips_dsp_linux): New defines.
(have_dsp): New global.
(mips_read_description): New, based on mips_arch_setup.
(mips_arch_setup): Reimplement.
(get_usrregs_info): New function.
(mips_cannot_fetch_register, mips_cannot_store_register)
(mips_get_pc, mips_set_pc, mips_fill_gregset, mips_store_gregset)
(mips_fill_fpregset, mips_store_fpregset): Adjust.
(target_regsets): Rename to ...
(mips_regsets): ... this, and make static.
(mips_regsets_info, mips_dsp_usrregs_info, mips_usrregs_info)
(dsp_regs_info, regs_info): New globals.
(mips_regs_info): New function.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-arm-low.c (tdesc_arm, tdesc_arm_with_iwmmxt)
(tdesc_arm_with_vfpv2, tdesc_arm_with_vfpv3, tdesc_arm_with_neon):
Declare.
(arm_fill_vfpregset, arm_store_vfpregset): Adjust.
(arm_read_description): New, with bits factored from
arm_arch_setup.
(arm_arch_setup): Reimplement.
(target_regsets): Rename to ...
(arm_regsets): ... this, and make static.
(arm_regsets_info, arm_usrregs_info, regs_info): New globals.
(arm_regs_info): New function.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-m68k-low.c (tdesc_m68k): Declare.
(target_regsets): Rename to ...
(m68k_regsets): ... this, and make static.
(m68k_regsets_info, m68k_usrregs_info, regs_info): New globals.
(m68k_regs_info): New function.
(m68k_arch_setup): New function.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-sh-low.c (tdesc_sharch): Declare.
(target_regsets): Rename to ...
(sh_regsets): ... this, and make static.
(sh_regsets_info, sh_usrregs_info, regs_info): New globals.
(sh_regs_info, sh_arch_setup): New functions.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-bfin-low.c (tdesc_bfin): Declare.
(bfin_arch_setup): New function.
(bfin_usrregs_info, regs_info): New globals.
(bfin_regs_info): New function.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-cris-low.c (tdesc_cris): Declare.
(cris_arch_setup): New function.
(cris_usrregs_info, regs_info): New globals.
(cris_regs_info): New function.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-cris-low.c (tdesc_crisv32): Declare.
(cris_arch_setup): New function.
(cris_regsets_info, cris_usrregs_info, regs_info): New globals.
(cris_regs_info): New function.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-m32r-low.c (tdesc_m32r): Declare.
(m32r_arch_setup): New function.
(m32r_usrregs_info, regs_info): New globals.
(m32r_regs_info): Adjust.
(initialize_low_arch): New function.
* linux-tic6x-low.c (tdesc_tic6x_c64xp_linux)
(tdesc_tic6x_c64x_linux, tdesc_tic6x_c62x_linux): Declare.
(tic6x_usrregs_info): Forward declare.
(tic6x_read_description): New function, based on ...
(tic6x_arch_setup): ... this. Reimplement.
(target_regsets): Rename to ...
(tic6x_regsets): ... this, and make static.
(tic6x_regsets_info, tic6x_usrregs_info, regs_info): New globals.
(tic6x_regs_info): New function.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-xtensa-low.c (tdesc_xtensa): Declare.
(xtensa_fill_gregset, xtensa_store_gregset): Adjust.
(target_regsets): Rename to ...
(xtensa_regsets): ... this, and make static.
(xtensa_regsets_info, xtensa_usrregs_info, regs_info): New
globals.
(xtensa_arch_setup, xtensa_regs_info): New functions.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-nios2-low.c (tdesc_nios2_linux): Declare.
(nios2_arch_setup): Set the current process'es tdesc.
(target_regsets): Rename to ...
(nios2_regsets): ... this.
(nios2_regsets_info, nios2_usrregs_info, regs_info): New globals.
(nios2_regs_info): New function.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-aarch64-low.c (tdesc_aarch64): Declare.
(aarch64_arch_setup): Set the current process'es tdesc.
(target_regsets): Rename to ...
(aarch64_regsets): ... this.
(aarch64_regsets_info, aarch64_usrregs_info, regs_info): New globals.
(aarch64_regs_info): New function.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* linux-tile-low.c (tdesc_tilegx, tdesc_tilegx32): Declare
globals.
(target_regsets): Rename to ...
(tile_regsets): ... this.
(tile_regsets_info, tile_usrregs_info, regs_info): New globals.
(tile_regs_info): New function.
(tile_arch_setup): Set the current process'es tdesc.
(the_low_target): Adjust.
(initialize_low_arch): New function.
* spu-low.c (tdesc_spu): Declare.
(spu_create_inferior, spu_attach): Set the new process'es tdesc.
* win32-arm-low.c (tdesc_arm): Declare.
(arm_arch_setup): New function.
(the_low_target): Install arm_arch_setup instead of
init_registers_arm.
* win32-i386-low.c (tdesc_i386, tdesc_amd64): Declare.
(init_windows_x86): Rename to ...
(i386_arch_setup): ... this. Set `win32_tdesc'.
(the_low_target): Adjust.
* win32-low.c (win32_tdesc): New global.
(child_add_thread): Don't create the thread cache here.
(do_initial_child_stuff): Set the new process'es tdesc.
* win32-low.h (struct target_desc): Forward declare.
(win32_tdesc): Declare.
* lynx-i386-low.c (tdesc_i386): Declare global.
(lynx_i386_arch_setup): Set `lynx_tdesc'.
* lynx-low.c (lynx_tdesc): New global.
(lynx_add_process): Set the new process'es tdesc.
* lynx-low.h (struct target_desc): Forward declare.
(lynx_tdesc): Declare global.
* lynx-ppc-low.c (tdesc_powerpc_32): Declare global.
(lynx_ppc_arch_setup): Set `lynx_tdesc'.
* nto-low.c (nto_tdesc): New global.
(do_attach): Set the new process'es tdesc.
* nto-low.h (struct target_desc): Forward declare.
(nto_tdesc): Declare.
* nto-x86-low.c (tdesc_i386): Declare.
(nto_x86_arch_setup): Set `nto_tdesc'.
gdb/
2013-06-07 Pedro Alves <palves@redhat.com>
* regformats/regdat.sh: Output #include tdesc.h. Make globals
static. Output a global target description pointer.
(init_registers_${name}): Adjust to initialize a
target description structure.
Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
* regcache.c (init_register_cache): Initialize
regcache->register_status.
(free_register_cache): Release regcache->register_status.
(regcache_cpy): Copy register_status.
(registers_to_string): Print 'x's for unavailable registers.
(supply_register): Mark the register's status valid or
unavailable, depending on whether a buffer was passed in or not.
(supply_register_zeroed): New.
(supply_regblock): Mark the registers' status valid or
unavailable, depending on whether a buffer was passed in or not.
* regcache.h (REG_UNAVAILABLE, REG_VALID): New defines.
(struct regcache): New `register_status' field.
(supply_register_zeroed): Declare.
* i387-fp.c (i387_xsave_to_cache): Zero out registers using
supply_register_zeroed, rather than passing a NULL buffer to
supply_register.
* tracepoint.c (fetch_traceframe_registers): Update comment.
(set_register_cache): Verify that PBUFSIZ is large enough to hold a
full register packet.
* regcache.h (registers_length): Remove prototype.
* server.h (PBUFSIZ): Define to 16384.
* gdbserver/thread-db.c: New file.
* gdbserver/proc-service.c: New file.
* gdbserver/acinclude.m4: New file.
* gdbserver/Makefile.in: Add GDBSERVER_LIBS, gdb_proc_service_h,
proc-service.o, and thread-db.o.
(linux-low.o): Add USE_THREAD_DB.
* gdbserver/acconfig.h: Add HAVE_PRGREGSET_T, HAVE_PRFPREGSET_T,
HAVE_LWPID_T, HAVE_PSADDR_T, and PRFPREGSET_T_BROKEN.
* gdbserver/aclocal.m4: Regenerated.
* gdbserver/config.in: Regenerated.
* gdbserver/configure: Regenerated.
* gdbserver/configure.in: Check for proc_service.h, sys/procfs.h,
thread_db.h, and linux/elf.h headrs.
Check for lwpid_t, psaddr_t, prgregset_t, prfpregset_t, and
PRFPREGSET_T_BROKEN. Introduce srv_thread_depfiles and USE_THREAD_DB.
Check for -lthread_db and thread support.
* gdbserver/configure.srv: Enable thread_db support for ARM, i386, MIPS,
PowerPC, and SuperH.
* gdbserver/i387-fp.c: Constify arguments.
* gdbserver/i387-fp.h: Likewise.
* gdbserver/inferiors.c: (struct thread_info): Renamed from
`struct inferior_info'. Remove PID member. Use generic inferior
list header. All uses updated.
(inferiors, signal_pid): Removed.
(all_threads): New variable.
(get_thread): Define.
(add_inferior_to_list): New function.
(for_each_inferior): New function.
(change_inferior_id): New function.
(add_inferior): Removed.
(remove_inferior): New function.
(add_thread): New function.
(free_one_thread): New function.
(remove_thread): New function.
(clear_inferiors): Use for_each_inferior and free_one_thread.
(find_inferior): New function.
(find_inferior_id): New function.
(inferior_target_data): Update argument type.
(set_inferior_target_data): Likewise.
(inferior_regcache_data): Likewise.
(set_inferior_regcache_data): Likewise.
* gdbserver/linux-low.c (linux_bp_reinsert): Remove.
(all_processes, stopping_threads, using_thrads)
(struct pending_signals, debug_threads, pid_of): New.
(inferior_pid): Replace with macro.
(struct inferior_linux_data): Remove.
(get_stop_pc, add_process): New functions.
(linux_create_inferior): Restore SIGRTMIN+1 before calling exec.
Use add_process and add_thread.
(linux_attach_lwp): New function, based on old linux_attach. Use
add_process and add_thread. Set stop_expected for new threads.
(linux_attach): New function.
(linux_kill_one_process): New function.
(linux_kill): Kill all LWPs.
(linux_thread_alive): Use find_inferior_id.
(check_removed_breakpoints, status_pending_p): New functions.
(linux_wait_for_process): Renamed from linux_wait_for_one_inferior.
Update. Use WNOHANG. Wait for cloned processes also. Update process
struct for the found process.
(linux_wait_for_event): New function.
(linux_wait): Use it. Support LWPs.
(send_sigstop, wait_for_sigstop, stop_all_processes)
(linux_resume_one_process, linux_continue_one_process): New functions.
(linux_resume): Support LWPs.
(REGISTER_RAW_SIZE): Remove.
(fetch_register): Use register_size instead. Call supply_register.
(usr_store_inferior_registers): Likewise. Call collect_register.
Fix recursive case.
(regsets_fetch_inferior_registers): Improve error message.
(regsets_store_inferior_registers): Add debugging.
(linux_look_up_symbols): Call thread_db_init if USE_THREAD_DB.
(unstopped_p, linux_signal_pid): New functions.
(linux_target_ops): Add linux_signal_pid.
(linux_init_signals): New function.
(initialize_low): Call it. Initialize using_threads.
* gdbserver/regcache.c (inferior_regcache_data): Add valid
flag.
(get_regcache): Fetch registers lazily. Add fetch argument
and update all callers.
(regcache_invalidate_one, regcache_invalidate): New
functions.
(new_register_cache): Renamed from create_register_cache.
Return the new regcache.
(free_register_cache): Change argument to a void *.
(registers_to_string, registers_from_string): Call get_regcache
with fetch flag set.
(register_data): Make static. Pass fetch flag to get_regcache.
(supply_register): Call get_regcache with fetch flag clear.
(collect_register): Call get_regcache with fetch flag set.
(collect_register_as_string): New function.
* gdbserver/regcache.h: Update.
* gdbserver/remote-utils.c (putpkt): Flush after debug output and use
stderr.
Handle input interrupts while waiting for an ACK.
(input_interrupt): Use signal_pid method.
(getpkt): Flush after debug output and use stderr.
(outreg): Use collect_register_as_string.
(new_thread_notify, dead_thread_notify): New functions.
(prepare_resume_reply): Check using_threads. Set thread_from_wait
and general_thread.
(look_up_one_symbol): Flush after debug output.
* gdbserver/server.c (step_thread, server_waiting): New variables.
(start_inferior): Don't use signal_pid. Update call to mywait.
(attach_inferior): Update call to mywait.
(handle_query): Handle qfThreadInfo and qsThreadInfo.
(main): Don't fetch/store registers explicitly. Use
set_desired_inferior. Support proposed ``Hs'' packet. Update
calls to mywait.
* gdbserver/server.h: Update.
(struct inferior_list, struct_inferior_list_entry): New.
* gdbserver/target.c (set_desired_inferior): New.
(write_inferior_memory): Constify.
(mywait): New function.
* gdbserver/target.h: Update.
(struct target_ops): New signal_pid method.
(mywait): Removed macro, added prototype.
* gdbserver/linux-low.h (regset_func): Removed.
(regset_fill_func, regset_store_func): New.
(enum regset_type): New.
(struct regset_info): Add type field. Use new operation types.
(struct linux_target_ops): stop_pc renamed to get_pc.
Add decr_pc_after_break and breakpoint_at.
(get_process, get_thread_proess, get_process_thread)
(strut process_info, all_processes, linux_attach_lwp)
(thread_db_init): New.
* gdbserver/linux-arm-low.c (arm_get_pc, arm_set_pc,
arm_breakpoint, arm_breakpoint_len, arm_breakpoint_at): New.
(the_low_target): Add new members.
* gdbserver/linux-i386-low.c (i386_store_gregset, i386_store_fpregset)
(i386_store_fpxregset): Constify.
(target_regsets): Add new kind identifier.
(i386_get_pc): Renamed from i386_stop_pc. Simplify.
(i386_set_pc): Add debugging.
(i386_breakpoint_at): New function.
(the_low_target): Add new members.
* gdbserver/linux-mips-low.c (mips_get_pc, mips_set_pc)
(mips_breakpoint, mips_breakpoint_len, mips_reinsert_addr)
(mips_breakpoint_at): New.
(the_low_target): Add new members.
* gdbserver/linux-ppc-low.c (ppc_get_pc, ppc_set_pc)
(ppc_breakpoint, ppc_breakpoint_len, ppc_breakpoint_at): New.
(the_low_target): Add new members.
* gdbserver/linux-sh-low.c (sh_get_pc, sh_set_pc)
(sh_breakpoint, sh_breakpoint_len, sh_breakpoint_at): New.
(the_low_target): Add new members.
* gdbserver/linux-x86-64-low.c (target_regsets): Add new kind
identifier.
* gdbserver/linux-low.c (regsets_fetch_inferior_registers),
(regsets_store_inferior_registers): Removed cast to int from
ptrace() calls.
* gdbserver/regcache.h: Added declaration of struct inferior_info.
* gdbserver/Makefile.in: Add regformats directory to INCLUDE_CFLAGS,
and remove unused $(INCLUDE_DIR).
Add regcache.c to OBS.
Add generated register protocol files to clean target.
Update dependencies for new objects, obsolete old target code.
* gdbserver/linux-low.c: Remove all platform-specific code to
new files. Remove various dead code. Update to use regcache
functionality.
* gdbserver/remote-utils.c (fromhex): Add return statement
to quiet warning.
(putpkt): Dynamically allocate buf2 because PBUFSIZ is no longer
constant.
(input_interrupt): Add integer parameter to match prototype
of a signal handler.
(outreg): Use register_data ().
(prepare_resume_reply): Use gdbserver_expedite_regs.
* gdbserver/server.c (main): Dynamically allocate own_buf because
PBUFSIZ is no longer constant. Use registers_to_string () and
registers_from_string ().
* gdbserver/server.h: No longer include "defs.h". Add prototypes
for error (), fatal (), and warning (). Update definition of
PBUFSIZ to use regcache functionality. Add include guard.
* gdbserver/utils.c (fatal): Add missing ``const''.
(warning): New function.
* regformats/regdat.sh: Include "regcache.h" in generated files.
Provide init_registers () function.
* regformats/regdef.h: Add prototype for set_register_cache ().
Add include guard.
* gdbserver/linux-arm-low.c: New file.
* gdbserver/linux-i386-low.c: New file.
* gdbserver/linux-ia64-low.c: New file.
* gdbserver/linux-m68k-low.c: New file.
* gdbserver/linux-mips-low.c: New file.
* gdbserver/linux-ppc-low.c: New file.
* gdbserver/linux-sh-low.c: New file.
* gdbserver/regcache.c: New file.
* gdbserver/regcache.h: New file.
* gdbserver/low-linux.c: Removed obsolete file.
Joel Brobecker