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3aee891821
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.
965 lines
23 KiB
C
965 lines
23 KiB
C
/* QNX Neutrino specific low level interface, for the remote server
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for GDB.
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Copyright (C) 2009-2013 Free Software Foundation, Inc.
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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 3 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, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include "gdbthread.h"
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#include "nto-low.h"
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#include <limits.h>
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#include <fcntl.h>
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#include <spawn.h>
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#include <sys/procfs.h>
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#include <sys/auxv.h>
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#include <stdarg.h>
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#include <sys/iomgr.h>
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#include <sys/neutrino.h>
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extern int using_threads;
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int using_threads = 1;
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const struct target_desc *nto_tdesc;
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static void
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nto_trace (const char *fmt, ...)
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{
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va_list arg_list;
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if (debug_threads == 0)
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return;
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fprintf (stderr, "nto:");
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va_start (arg_list, fmt);
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vfprintf (stderr, fmt, arg_list);
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va_end (arg_list);
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}
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#define TRACE nto_trace
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/* Structure holding neutrino specific information about
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inferior. */
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struct nto_inferior
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{
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char nto_procfs_path[PATH_MAX];
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int ctl_fd;
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pid_t pid;
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int exit_signo; /* For tracking exit status. */
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};
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static struct nto_inferior nto_inferior;
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static void
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init_nto_inferior (struct nto_inferior *nto_inferior)
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{
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memset (nto_inferior, 0, sizeof (struct nto_inferior));
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nto_inferior->ctl_fd = -1;
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nto_inferior->pid = -1;
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}
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static void
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do_detach (void)
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{
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if (nto_inferior.ctl_fd != -1)
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{
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nto_trace ("Closing fd\n");
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close (nto_inferior.ctl_fd);
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init_nto_inferior (&nto_inferior);
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}
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}
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/* Set current thread. Return 1 on success, 0 otherwise. */
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static int
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nto_set_thread (ptid_t ptid)
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{
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int res = 0;
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TRACE ("%s pid: %d tid: %ld\n", __func__, ptid_get_pid (ptid),
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ptid_get_lwp (ptid));
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|
if (nto_inferior.ctl_fd != -1
|
|
&& !ptid_equal (ptid, null_ptid)
|
|
&& !ptid_equal (ptid, minus_one_ptid))
|
|
{
|
|
pthread_t tid = ptid_get_lwp (ptid);
|
|
|
|
if (EOK == devctl (nto_inferior.ctl_fd, DCMD_PROC_CURTHREAD, &tid,
|
|
sizeof (tid), 0))
|
|
res = 1;
|
|
else
|
|
TRACE ("%s: Error: failed to set current thread\n", __func__);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/* This function will determine all alive threads. Note that we do not list
|
|
dead but unjoined threads even though they are still in the process' thread
|
|
list.
|
|
|
|
NTO_INFERIOR must not be NULL. */
|
|
|
|
static void
|
|
nto_find_new_threads (struct nto_inferior *nto_inferior)
|
|
{
|
|
pthread_t tid;
|
|
|
|
TRACE ("%s pid:%d\n", __func__, nto_inferior->pid);
|
|
|
|
if (nto_inferior->ctl_fd == -1)
|
|
return;
|
|
|
|
for (tid = 1;; ++tid)
|
|
{
|
|
procfs_status status;
|
|
ptid_t ptid;
|
|
int err;
|
|
|
|
status.tid = tid;
|
|
err = devctl (nto_inferior->ctl_fd, DCMD_PROC_TIDSTATUS, &status,
|
|
sizeof (status), 0);
|
|
|
|
if (err != EOK || status.tid == 0)
|
|
break;
|
|
|
|
/* All threads in between are gone. */
|
|
while (tid != status.tid || status.state == STATE_DEAD)
|
|
{
|
|
struct thread_info *ti;
|
|
|
|
ptid = ptid_build (nto_inferior->pid, tid, 0);
|
|
ti = find_thread_ptid (ptid);
|
|
if (ti != NULL)
|
|
{
|
|
TRACE ("Removing thread %d\n", tid);
|
|
remove_thread (ti);
|
|
}
|
|
if (tid == status.tid)
|
|
break;
|
|
++tid;
|
|
}
|
|
|
|
if (status.state != STATE_DEAD)
|
|
{
|
|
TRACE ("Adding thread %d\n", tid);
|
|
ptid = ptid_build (nto_inferior->pid, tid, 0);
|
|
if (!find_thread_ptid (ptid))
|
|
add_thread (ptid, NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Given pid, open procfs path. */
|
|
|
|
static pid_t
|
|
do_attach (pid_t pid)
|
|
{
|
|
procfs_status status;
|
|
struct sigevent event;
|
|
|
|
if (nto_inferior.ctl_fd != -1)
|
|
{
|
|
close (nto_inferior.ctl_fd);
|
|
init_nto_inferior (&nto_inferior);
|
|
}
|
|
xsnprintf (nto_inferior.nto_procfs_path, PATH_MAX - 1, "/proc/%d/as", pid);
|
|
nto_inferior.ctl_fd = open (nto_inferior.nto_procfs_path, O_RDWR);
|
|
if (nto_inferior.ctl_fd == -1)
|
|
{
|
|
TRACE ("Failed to open %s\n", nto_inferior.nto_procfs_path);
|
|
init_nto_inferior (&nto_inferior);
|
|
return -1;
|
|
}
|
|
if (devctl (nto_inferior.ctl_fd, DCMD_PROC_STOP, &status, sizeof (status), 0)
|
|
!= EOK)
|
|
{
|
|
do_detach ();
|
|
return -1;
|
|
}
|
|
nto_inferior.pid = pid;
|
|
/* Define a sigevent for process stopped notification. */
|
|
event.sigev_notify = SIGEV_SIGNAL_THREAD;
|
|
event.sigev_signo = SIGUSR1;
|
|
event.sigev_code = 0;
|
|
event.sigev_value.sival_ptr = NULL;
|
|
event.sigev_priority = -1;
|
|
devctl (nto_inferior.ctl_fd, DCMD_PROC_EVENT, &event, sizeof (event), 0);
|
|
|
|
if (devctl (nto_inferior.ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status),
|
|
0) == EOK
|
|
&& (status.flags & _DEBUG_FLAG_STOPPED))
|
|
{
|
|
ptid_t ptid;
|
|
struct process_info *proc;
|
|
|
|
kill (pid, SIGCONT);
|
|
ptid = ptid_build (status.pid, status.tid, 0);
|
|
the_low_target.arch_setup ();
|
|
proc = add_process (status.pid, 1);
|
|
proc->tdesc = nto_tdesc;
|
|
TRACE ("Adding thread: pid=%d tid=%ld\n", status.pid,
|
|
ptid_get_lwp (ptid));
|
|
nto_find_new_threads (&nto_inferior);
|
|
}
|
|
else
|
|
{
|
|
do_detach ();
|
|
return -1;
|
|
}
|
|
|
|
return pid;
|
|
}
|
|
|
|
/* Read or write LEN bytes from/to inferior's MEMADDR memory address
|
|
into gdbservers's MYADDR buffer. Return number of bytes actually
|
|
transfered. */
|
|
|
|
static int
|
|
nto_xfer_memory (off_t memaddr, unsigned char *myaddr, int len,
|
|
int dowrite)
|
|
{
|
|
int nbytes = 0;
|
|
|
|
if (lseek (nto_inferior.ctl_fd, memaddr, SEEK_SET) == memaddr)
|
|
{
|
|
if (dowrite)
|
|
nbytes = write (nto_inferior.ctl_fd, myaddr, len);
|
|
else
|
|
nbytes = read (nto_inferior.ctl_fd, myaddr, len);
|
|
if (nbytes < 0)
|
|
nbytes = 0;
|
|
}
|
|
if (nbytes == 0)
|
|
{
|
|
int e = errno;
|
|
TRACE ("Error in %s : errno=%d (%s)\n", __func__, e, strerror (e));
|
|
}
|
|
return nbytes;
|
|
}
|
|
|
|
/* Insert or remove breakpoint or watchpoint at address ADDR.
|
|
TYPE can be one of Neutrino breakpoint types. SIZE must be 0 for
|
|
inserting the point, -1 for removing it.
|
|
|
|
Return 0 on success, 1 otherwise. */
|
|
|
|
static int
|
|
nto_breakpoint (CORE_ADDR addr, int type, int size)
|
|
{
|
|
procfs_break brk;
|
|
|
|
brk.type = type;
|
|
brk.addr = addr;
|
|
brk.size = size;
|
|
if (devctl (nto_inferior.ctl_fd, DCMD_PROC_BREAK, &brk, sizeof (brk), 0)
|
|
!= EOK)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/* Read auxiliary vector from inferior's initial stack into gdbserver's
|
|
MYADDR buffer, up to LEN bytes.
|
|
|
|
Return number of bytes read. */
|
|
|
|
static int
|
|
nto_read_auxv_from_initial_stack (CORE_ADDR initial_stack,
|
|
unsigned char *myaddr,
|
|
unsigned int len)
|
|
{
|
|
int data_ofs = 0;
|
|
int anint;
|
|
unsigned int len_read = 0;
|
|
|
|
/* Skip over argc, argv and envp... Comment from ldd.c:
|
|
|
|
The startup frame is set-up so that we have:
|
|
auxv
|
|
NULL
|
|
...
|
|
envp2
|
|
envp1 <----- void *frame + (argc + 2) * sizeof(char *)
|
|
NULL
|
|
...
|
|
argv2
|
|
argv1
|
|
argc <------ void * frame
|
|
|
|
On entry to ldd, frame gives the address of argc on the stack. */
|
|
if (nto_xfer_memory (initial_stack, (unsigned char *)&anint,
|
|
sizeof (anint), 0) != sizeof (anint))
|
|
return 0;
|
|
|
|
/* Size of pointer is assumed to be 4 bytes (32 bit arch. ) */
|
|
data_ofs += (anint + 2) * sizeof (void *); /* + 2 comes from argc itself and
|
|
NULL terminating pointer in
|
|
argv. */
|
|
|
|
/* Now loop over env table: */
|
|
while (nto_xfer_memory (initial_stack + data_ofs,
|
|
(unsigned char *)&anint, sizeof (anint), 0)
|
|
== sizeof (anint))
|
|
{
|
|
data_ofs += sizeof (anint);
|
|
if (anint == 0)
|
|
break;
|
|
}
|
|
initial_stack += data_ofs;
|
|
|
|
memset (myaddr, 0, len);
|
|
while (len_read <= len - sizeof (auxv_t))
|
|
{
|
|
auxv_t *auxv = (auxv_t *)myaddr;
|
|
|
|
/* Search backwards until we have read AT_PHDR (num. 3),
|
|
AT_PHENT (num 4), AT_PHNUM (num 5) */
|
|
if (nto_xfer_memory (initial_stack, (unsigned char *)auxv,
|
|
sizeof (auxv_t), 0) == sizeof (auxv_t))
|
|
{
|
|
if (auxv->a_type != AT_NULL)
|
|
{
|
|
auxv++;
|
|
len_read += sizeof (auxv_t);
|
|
}
|
|
if (auxv->a_type == AT_PHNUM) /* That's all we need. */
|
|
break;
|
|
initial_stack += sizeof (auxv_t);
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
TRACE ("auxv: len_read: %d\n", len_read);
|
|
return len_read;
|
|
}
|
|
|
|
/* Start inferior specified by PROGRAM passing arguments ALLARGS. */
|
|
|
|
static int
|
|
nto_create_inferior (char *program, char **allargs)
|
|
{
|
|
struct inheritance inherit;
|
|
pid_t pid;
|
|
sigset_t set;
|
|
|
|
TRACE ("%s %s\n", __func__, program);
|
|
/* Clear any pending SIGUSR1's but keep the behavior the same. */
|
|
signal (SIGUSR1, signal (SIGUSR1, SIG_IGN));
|
|
|
|
sigemptyset (&set);
|
|
sigaddset (&set, SIGUSR1);
|
|
sigprocmask (SIG_UNBLOCK, &set, NULL);
|
|
|
|
memset (&inherit, 0, sizeof (inherit));
|
|
inherit.flags |= SPAWN_SETGROUP | SPAWN_HOLD;
|
|
inherit.pgroup = SPAWN_NEWPGROUP;
|
|
pid = spawnp (program, 0, NULL, &inherit, allargs, 0);
|
|
sigprocmask (SIG_BLOCK, &set, NULL);
|
|
|
|
if (pid == -1)
|
|
return -1;
|
|
|
|
if (do_attach (pid) != pid)
|
|
return -1;
|
|
|
|
return pid;
|
|
}
|
|
|
|
/* Attach to process PID. */
|
|
|
|
static int
|
|
nto_attach (unsigned long pid)
|
|
{
|
|
TRACE ("%s %ld\n", __func__, pid);
|
|
if (do_attach (pid) != pid)
|
|
error ("Unable to attach to %ld\n", pid);
|
|
return 0;
|
|
}
|
|
|
|
/* Send signal to process PID. */
|
|
|
|
static int
|
|
nto_kill (int pid)
|
|
{
|
|
TRACE ("%s %d\n", __func__, pid);
|
|
kill (pid, SIGKILL);
|
|
do_detach ();
|
|
return 0;
|
|
}
|
|
|
|
/* Detach from process PID. */
|
|
|
|
static int
|
|
nto_detach (int pid)
|
|
{
|
|
TRACE ("%s %d\n", __func__, pid);
|
|
do_detach ();
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
nto_mourn (struct process_info *process)
|
|
{
|
|
remove_process (process);
|
|
}
|
|
|
|
/* Check if the given thread is alive.
|
|
|
|
Return 1 if alive, 0 otherwise. */
|
|
|
|
static int
|
|
nto_thread_alive (ptid_t ptid)
|
|
{
|
|
int res;
|
|
|
|
TRACE ("%s pid:%d tid:%d\n", __func__, ptid_get_pid (ptid),
|
|
ptid_get_lwp (ptid));
|
|
if (SignalKill (0, ptid_get_pid (ptid), ptid_get_lwp (ptid),
|
|
0, 0, 0) == -1)
|
|
res = 0;
|
|
else
|
|
res = 1;
|
|
TRACE ("%s: %s\n", __func__, res ? "yes" : "no");
|
|
return res;
|
|
}
|
|
|
|
/* Resume inferior's execution. */
|
|
|
|
static void
|
|
nto_resume (struct thread_resume *resume_info, size_t n)
|
|
{
|
|
/* We can only work in all-stop mode. */
|
|
procfs_status status;
|
|
procfs_run run;
|
|
int err;
|
|
|
|
TRACE ("%s\n", __func__);
|
|
/* Workaround for aliasing rules violation. */
|
|
sigset_t *run_fault = (sigset_t *) (void *) &run.fault;
|
|
|
|
nto_set_thread (resume_info->thread);
|
|
|
|
run.flags = _DEBUG_RUN_FAULT | _DEBUG_RUN_TRACE;
|
|
if (resume_info->kind == resume_step)
|
|
run.flags |= _DEBUG_RUN_STEP;
|
|
run.flags |= _DEBUG_RUN_ARM;
|
|
|
|
sigemptyset (run_fault);
|
|
sigaddset (run_fault, FLTBPT);
|
|
sigaddset (run_fault, FLTTRACE);
|
|
sigaddset (run_fault, FLTILL);
|
|
sigaddset (run_fault, FLTPRIV);
|
|
sigaddset (run_fault, FLTBOUNDS);
|
|
sigaddset (run_fault, FLTIOVF);
|
|
sigaddset (run_fault, FLTIZDIV);
|
|
sigaddset (run_fault, FLTFPE);
|
|
sigaddset (run_fault, FLTPAGE);
|
|
sigaddset (run_fault, FLTSTACK);
|
|
sigaddset (run_fault, FLTACCESS);
|
|
|
|
sigemptyset (&run.trace);
|
|
if (resume_info->sig)
|
|
{
|
|
int signal_to_pass;
|
|
|
|
devctl (nto_inferior.ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status),
|
|
0);
|
|
signal_to_pass = resume_info->sig;
|
|
if (status.why & (_DEBUG_WHY_SIGNALLED | _DEBUG_WHY_FAULTED))
|
|
{
|
|
if (signal_to_pass != status.info.si_signo)
|
|
{
|
|
kill (status.pid, signal_to_pass);
|
|
run.flags |= _DEBUG_RUN_CLRFLT | _DEBUG_RUN_CLRSIG;
|
|
}
|
|
else /* Let it kill the program without telling us. */
|
|
sigdelset (&run.trace, signal_to_pass);
|
|
}
|
|
}
|
|
else
|
|
run.flags |= _DEBUG_RUN_CLRSIG | _DEBUG_RUN_CLRFLT;
|
|
|
|
sigfillset (&run.trace);
|
|
|
|
regcache_invalidate ();
|
|
|
|
err = devctl (nto_inferior.ctl_fd, DCMD_PROC_RUN, &run, sizeof (run), 0);
|
|
if (err != EOK)
|
|
TRACE ("Error: %d \"%s\"\n", err, strerror (err));
|
|
}
|
|
|
|
/* Wait for inferior's event.
|
|
|
|
Return ptid of thread that caused the event. */
|
|
|
|
static ptid_t
|
|
nto_wait (ptid_t ptid,
|
|
struct target_waitstatus *ourstatus, int target_options)
|
|
{
|
|
sigset_t set;
|
|
siginfo_t info;
|
|
procfs_status status;
|
|
const int trace_mask = (_DEBUG_FLAG_TRACE_EXEC | _DEBUG_FLAG_TRACE_RD
|
|
| _DEBUG_FLAG_TRACE_WR | _DEBUG_FLAG_TRACE_MODIFY);
|
|
|
|
TRACE ("%s\n", __func__);
|
|
|
|
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
|
|
|
|
sigemptyset (&set);
|
|
sigaddset (&set, SIGUSR1);
|
|
|
|
devctl (nto_inferior.ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0);
|
|
while (!(status.flags & _DEBUG_FLAG_ISTOP))
|
|
{
|
|
sigwaitinfo (&set, &info);
|
|
devctl (nto_inferior.ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status),
|
|
0);
|
|
}
|
|
nto_find_new_threads (&nto_inferior);
|
|
|
|
if (status.flags & _DEBUG_FLAG_SSTEP)
|
|
{
|
|
TRACE ("SSTEP\n");
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
ourstatus->value.sig = GDB_SIGNAL_TRAP;
|
|
}
|
|
/* Was it a breakpoint? */
|
|
else if (status.flags & trace_mask)
|
|
{
|
|
TRACE ("STOPPED\n");
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
ourstatus->value.sig = GDB_SIGNAL_TRAP;
|
|
}
|
|
else if (status.flags & _DEBUG_FLAG_ISTOP)
|
|
{
|
|
TRACE ("ISTOP\n");
|
|
switch (status.why)
|
|
{
|
|
case _DEBUG_WHY_SIGNALLED:
|
|
TRACE (" SIGNALLED\n");
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
ourstatus->value.sig =
|
|
gdb_signal_from_host (status.info.si_signo);
|
|
nto_inferior.exit_signo = ourstatus->value.sig;
|
|
break;
|
|
case _DEBUG_WHY_FAULTED:
|
|
TRACE (" FAULTED\n");
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
if (status.info.si_signo == SIGTRAP)
|
|
{
|
|
ourstatus->value.sig = 0;
|
|
nto_inferior.exit_signo = 0;
|
|
}
|
|
else
|
|
{
|
|
ourstatus->value.sig =
|
|
gdb_signal_from_host (status.info.si_signo);
|
|
nto_inferior.exit_signo = ourstatus->value.sig;
|
|
}
|
|
break;
|
|
|
|
case _DEBUG_WHY_TERMINATED:
|
|
{
|
|
int waitval = 0;
|
|
|
|
TRACE (" TERMINATED\n");
|
|
waitpid (ptid_get_pid (ptid), &waitval, WNOHANG);
|
|
if (nto_inferior.exit_signo)
|
|
{
|
|
/* Abnormal death. */
|
|
ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
|
|
ourstatus->value.sig = nto_inferior.exit_signo;
|
|
}
|
|
else
|
|
{
|
|
/* Normal death. */
|
|
ourstatus->kind = TARGET_WAITKIND_EXITED;
|
|
ourstatus->value.integer = WEXITSTATUS (waitval);
|
|
}
|
|
nto_inferior.exit_signo = 0;
|
|
break;
|
|
}
|
|
|
|
case _DEBUG_WHY_REQUESTED:
|
|
TRACE ("REQUESTED\n");
|
|
/* We are assuming a requested stop is due to a SIGINT. */
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
ourstatus->value.sig = GDB_SIGNAL_INT;
|
|
nto_inferior.exit_signo = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ptid_build (status.pid, status.tid, 0);
|
|
}
|
|
|
|
/* Fetch inferior's registers for currently selected thread (CURRENT_INFERIOR).
|
|
If REGNO is -1, fetch all registers, or REGNO register only otherwise. */
|
|
|
|
static void
|
|
nto_fetch_registers (struct regcache *regcache, int regno)
|
|
{
|
|
int regsize;
|
|
procfs_greg greg;
|
|
ptid_t ptid;
|
|
|
|
TRACE ("%s (regno=%d)\n", __func__, regno);
|
|
if (regno >= the_low_target.num_regs)
|
|
return;
|
|
|
|
if (current_inferior == NULL)
|
|
{
|
|
TRACE ("current_inferior is NULL\n");
|
|
return;
|
|
}
|
|
ptid = thread_to_gdb_id (current_inferior);
|
|
if (!nto_set_thread (ptid))
|
|
return;
|
|
|
|
if (devctl (nto_inferior.ctl_fd, DCMD_PROC_GETGREG, &greg, sizeof (greg),
|
|
®size) == EOK)
|
|
{
|
|
if (regno == -1) /* All registers. */
|
|
{
|
|
for (regno = 0; regno != the_low_target.num_regs; ++regno)
|
|
{
|
|
const unsigned int registeroffset
|
|
= the_low_target.register_offset (regno);
|
|
supply_register (regcache, regno,
|
|
((char *)&greg) + registeroffset);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
const unsigned int registeroffset
|
|
= the_low_target.register_offset (regno);
|
|
if (registeroffset == -1)
|
|
return;
|
|
supply_register (regcache, regno, ((char *)&greg) + registeroffset);
|
|
}
|
|
}
|
|
else
|
|
TRACE ("ERROR reading registers from inferior.\n");
|
|
}
|
|
|
|
/* Store registers for currently selected thread (CURRENT_INFERIOR).
|
|
We always store all registers, regardless of REGNO. */
|
|
|
|
static void
|
|
nto_store_registers (struct regcache *regcache, int regno)
|
|
{
|
|
procfs_greg greg;
|
|
int err;
|
|
ptid_t ptid;
|
|
|
|
TRACE ("%s (regno:%d)\n", __func__, regno);
|
|
|
|
if (current_inferior == NULL)
|
|
{
|
|
TRACE ("current_inferior is NULL\n");
|
|
return;
|
|
}
|
|
ptid = thread_to_gdb_id (current_inferior);
|
|
if (!nto_set_thread (ptid))
|
|
return;
|
|
|
|
memset (&greg, 0, sizeof (greg));
|
|
for (regno = 0; regno != the_low_target.num_regs; ++regno)
|
|
{
|
|
const unsigned int regoffset
|
|
= the_low_target.register_offset (regno);
|
|
collect_register (regcache, regno, ((char *)&greg) + regoffset);
|
|
}
|
|
err = devctl (nto_inferior.ctl_fd, DCMD_PROC_SETGREG, &greg, sizeof (greg),
|
|
0);
|
|
if (err != EOK)
|
|
TRACE ("Error: setting registers.\n");
|
|
}
|
|
|
|
/* Read LEN bytes from inferior's memory address MEMADDR into
|
|
gdbserver's MYADDR buffer.
|
|
|
|
Return 0 on success -1 otherwise. */
|
|
|
|
static int
|
|
nto_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
|
|
{
|
|
TRACE ("%s memaddr:0x%08lx, len:%d\n", __func__, memaddr, len);
|
|
|
|
if (nto_xfer_memory (memaddr, myaddr, len, 0) != len)
|
|
{
|
|
TRACE ("Failed to read memory\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Write LEN bytes from gdbserver's buffer MYADDR into inferior's
|
|
memory at address MEMADDR.
|
|
|
|
Return 0 on success -1 otherwise. */
|
|
|
|
static int
|
|
nto_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
|
|
{
|
|
int len_written;
|
|
|
|
TRACE ("%s memaddr: 0x%08llx len: %d\n", __func__, memaddr, len);
|
|
if ((len_written = nto_xfer_memory (memaddr, (unsigned char *)myaddr, len,
|
|
1))
|
|
!= len)
|
|
{
|
|
TRACE ("Wanted to write: %d but written: %d\n", len, len_written);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Stop inferior. We always stop all threads. */
|
|
|
|
static void
|
|
nto_request_interrupt (void)
|
|
{
|
|
TRACE ("%s\n", __func__);
|
|
nto_set_thread (ptid_build (nto_inferior.pid, 1, 0));
|
|
if (EOK != devctl (nto_inferior.ctl_fd, DCMD_PROC_STOP, NULL, 0, 0))
|
|
TRACE ("Error stopping inferior.\n");
|
|
}
|
|
|
|
/* Read auxiliary vector from inferior's memory into gdbserver's buffer
|
|
MYADDR. We always read whole auxv.
|
|
|
|
Return number of bytes stored in MYADDR buffer, 0 if OFFSET > 0
|
|
or -1 on error. */
|
|
|
|
static int
|
|
nto_read_auxv (CORE_ADDR offset, unsigned char *myaddr, unsigned int len)
|
|
{
|
|
int err;
|
|
CORE_ADDR initial_stack;
|
|
procfs_info procinfo;
|
|
|
|
TRACE ("%s\n", __func__);
|
|
if (offset > 0)
|
|
return 0;
|
|
|
|
err = devctl (nto_inferior.ctl_fd, DCMD_PROC_INFO, &procinfo,
|
|
sizeof procinfo, 0);
|
|
if (err != EOK)
|
|
return -1;
|
|
|
|
initial_stack = procinfo.initial_stack;
|
|
|
|
return nto_read_auxv_from_initial_stack (initial_stack, myaddr, len);
|
|
}
|
|
|
|
/* Insert {break/watch}point at address ADDR.
|
|
TYPE must be in '0'..'4' range. LEN is not used. */
|
|
|
|
static int
|
|
nto_insert_point (char type, CORE_ADDR addr, int len)
|
|
{
|
|
int wtype = _DEBUG_BREAK_HW; /* Always request HW. */
|
|
|
|
TRACE ("%s type:%c addr: 0x%08lx len:%d\n", __func__, (int)type, addr, len);
|
|
switch (type)
|
|
{
|
|
case '0': /* software-breakpoint */
|
|
wtype = _DEBUG_BREAK_EXEC;
|
|
break;
|
|
case '1': /* hardware-breakpoint */
|
|
wtype |= _DEBUG_BREAK_EXEC;
|
|
break;
|
|
case '2': /* write watchpoint */
|
|
wtype |= _DEBUG_BREAK_RW;
|
|
break;
|
|
case '3': /* read watchpoint */
|
|
wtype |= _DEBUG_BREAK_RD;
|
|
break;
|
|
case '4': /* access watchpoint */
|
|
wtype |= _DEBUG_BREAK_RW;
|
|
break;
|
|
default:
|
|
return 1; /* Not supported. */
|
|
}
|
|
return nto_breakpoint (addr, wtype, 0);
|
|
}
|
|
|
|
/* Remove {break/watch}point at address ADDR.
|
|
TYPE must be in '0'..'4' range. LEN is not used. */
|
|
|
|
static int
|
|
nto_remove_point (char type, CORE_ADDR addr, int len)
|
|
{
|
|
int wtype = _DEBUG_BREAK_HW; /* Always request HW. */
|
|
|
|
TRACE ("%s type:%c addr: 0x%08lx len:%d\n", __func__, (int)type, addr, len);
|
|
switch (type)
|
|
{
|
|
case '0': /* software-breakpoint */
|
|
wtype = _DEBUG_BREAK_EXEC;
|
|
break;
|
|
case '1': /* hardware-breakpoint */
|
|
wtype |= _DEBUG_BREAK_EXEC;
|
|
break;
|
|
case '2': /* write watchpoint */
|
|
wtype |= _DEBUG_BREAK_RW;
|
|
break;
|
|
case '3': /* read watchpoint */
|
|
wtype |= _DEBUG_BREAK_RD;
|
|
break;
|
|
case '4': /* access watchpoint */
|
|
wtype |= _DEBUG_BREAK_RW;
|
|
break;
|
|
default:
|
|
return 1; /* Not supported. */
|
|
}
|
|
return nto_breakpoint (addr, wtype, -1);
|
|
}
|
|
|
|
/* Check if the reason of stop for current thread (CURRENT_INFERIOR) is
|
|
a watchpoint.
|
|
|
|
Return 1 if stopped by watchpoint, 0 otherwise. */
|
|
|
|
static int
|
|
nto_stopped_by_watchpoint (void)
|
|
{
|
|
int ret = 0;
|
|
|
|
TRACE ("%s\n", __func__);
|
|
if (nto_inferior.ctl_fd != -1 && current_inferior != NULL)
|
|
{
|
|
ptid_t ptid;
|
|
|
|
ptid = thread_to_gdb_id (current_inferior);
|
|
if (nto_set_thread (ptid))
|
|
{
|
|
const int watchmask = _DEBUG_FLAG_TRACE_RD | _DEBUG_FLAG_TRACE_WR
|
|
| _DEBUG_FLAG_TRACE_MODIFY;
|
|
procfs_status status;
|
|
int err;
|
|
|
|
err = devctl (nto_inferior.ctl_fd, DCMD_PROC_STATUS, &status,
|
|
sizeof (status), 0);
|
|
if (err == EOK && (status.flags & watchmask))
|
|
ret = 1;
|
|
}
|
|
}
|
|
TRACE ("%s: %s\n", __func__, ret ? "yes" : "no");
|
|
return ret;
|
|
}
|
|
|
|
/* Get instruction pointer for CURRENT_INFERIOR thread.
|
|
|
|
Return inferior's instruction pointer value, or 0 on error. */
|
|
|
|
static CORE_ADDR
|
|
nto_stopped_data_address (void)
|
|
{
|
|
CORE_ADDR ret = (CORE_ADDR)0;
|
|
|
|
TRACE ("%s\n", __func__);
|
|
if (nto_inferior.ctl_fd != -1 && current_inferior != NULL)
|
|
{
|
|
ptid_t ptid;
|
|
|
|
ptid = thread_to_gdb_id (current_inferior);
|
|
|
|
if (nto_set_thread (ptid))
|
|
{
|
|
procfs_status status;
|
|
|
|
if (devctl (nto_inferior.ctl_fd, DCMD_PROC_STATUS, &status,
|
|
sizeof (status), 0) == EOK)
|
|
ret = status.ip;
|
|
}
|
|
}
|
|
TRACE ("%s: 0x%08lx\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
/* We do not currently support non-stop. */
|
|
|
|
static int
|
|
nto_supports_non_stop (void)
|
|
{
|
|
TRACE ("%s\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
static struct target_ops nto_target_ops = {
|
|
nto_create_inferior,
|
|
nto_attach,
|
|
nto_kill,
|
|
nto_detach,
|
|
nto_mourn,
|
|
NULL, /* nto_join */
|
|
nto_thread_alive,
|
|
nto_resume,
|
|
nto_wait,
|
|
nto_fetch_registers,
|
|
nto_store_registers,
|
|
NULL, /* prepare_to_access_memory */
|
|
NULL, /* done_accessing_memory */
|
|
nto_read_memory,
|
|
nto_write_memory,
|
|
NULL, /* nto_look_up_symbols */
|
|
nto_request_interrupt,
|
|
nto_read_auxv,
|
|
nto_insert_point,
|
|
nto_remove_point,
|
|
nto_stopped_by_watchpoint,
|
|
nto_stopped_data_address,
|
|
NULL, /* nto_read_offsets */
|
|
NULL, /* thread_db_set_tls_address */
|
|
NULL,
|
|
hostio_last_error_from_errno,
|
|
NULL, /* nto_qxfer_osdata */
|
|
NULL, /* xfer_siginfo */
|
|
nto_supports_non_stop,
|
|
NULL, /* async */
|
|
NULL /* start_non_stop */
|
|
};
|
|
|
|
|
|
/* Global function called by server.c. Initializes QNX Neutrino
|
|
gdbserver. */
|
|
|
|
void
|
|
initialize_low (void)
|
|
{
|
|
sigset_t set;
|
|
|
|
TRACE ("%s\n", __func__);
|
|
set_target_ops (&nto_target_ops);
|
|
set_breakpoint_data (the_low_target.breakpoint,
|
|
the_low_target.breakpoint_len);
|
|
|
|
/* We use SIGUSR1 to gain control after we block waiting for a process.
|
|
We use sigwaitevent to wait. */
|
|
sigemptyset (&set);
|
|
sigaddset (&set, SIGUSR1);
|
|
sigprocmask (SIG_BLOCK, &set, NULL);
|
|
}
|
|
|