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.
570 lines
15 KiB
C
570 lines
15 KiB
C
/* i387-specific utility functions, for the remote server for GDB.
|
|
Copyright (C) 2000-2013 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include "server.h"
|
|
#include "i387-fp.h"
|
|
#include "i386-xstate.h"
|
|
|
|
/* Note: These functions preserve the reserved bits in control registers.
|
|
However, gdbserver promptly throws away that information. */
|
|
|
|
/* These structs should have the proper sizes and alignment on both
|
|
i386 and x86-64 machines. */
|
|
|
|
struct i387_fsave {
|
|
/* All these are only sixteen bits, plus padding, except for fop (which
|
|
is only eleven bits), and fooff / fioff (which are 32 bits each). */
|
|
unsigned short fctrl;
|
|
unsigned short pad1;
|
|
unsigned short fstat;
|
|
unsigned short pad2;
|
|
unsigned short ftag;
|
|
unsigned short pad3;
|
|
unsigned int fioff;
|
|
unsigned short fiseg;
|
|
unsigned short fop;
|
|
unsigned int fooff;
|
|
unsigned short foseg;
|
|
unsigned short pad4;
|
|
|
|
/* Space for eight 80-bit FP values. */
|
|
unsigned char st_space[80];
|
|
};
|
|
|
|
struct i387_fxsave {
|
|
/* All these are only sixteen bits, plus padding, except for fop (which
|
|
is only eleven bits), and fooff / fioff (which are 32 bits each). */
|
|
unsigned short fctrl;
|
|
unsigned short fstat;
|
|
unsigned short ftag;
|
|
unsigned short fop;
|
|
unsigned int fioff;
|
|
unsigned short fiseg;
|
|
unsigned short pad1;
|
|
unsigned int fooff;
|
|
unsigned short foseg;
|
|
unsigned short pad12;
|
|
|
|
unsigned int mxcsr;
|
|
unsigned int pad3;
|
|
|
|
/* Space for eight 80-bit FP values in 128-bit spaces. */
|
|
unsigned char st_space[128];
|
|
|
|
/* Space for eight 128-bit XMM values, or 16 on x86-64. */
|
|
unsigned char xmm_space[256];
|
|
};
|
|
|
|
struct i387_xsave {
|
|
/* All these are only sixteen bits, plus padding, except for fop (which
|
|
is only eleven bits), and fooff / fioff (which are 32 bits each). */
|
|
unsigned short fctrl;
|
|
unsigned short fstat;
|
|
unsigned short ftag;
|
|
unsigned short fop;
|
|
unsigned int fioff;
|
|
unsigned short fiseg;
|
|
unsigned short pad1;
|
|
unsigned int fooff;
|
|
unsigned short foseg;
|
|
unsigned short pad12;
|
|
|
|
unsigned int mxcsr;
|
|
unsigned int mxcsr_mask;
|
|
|
|
/* Space for eight 80-bit FP values in 128-bit spaces. */
|
|
unsigned char st_space[128];
|
|
|
|
/* Space for eight 128-bit XMM values, or 16 on x86-64. */
|
|
unsigned char xmm_space[256];
|
|
|
|
unsigned char reserved1[48];
|
|
|
|
/* The extended control register 0 (the XFEATURE_ENABLED_MASK
|
|
register). */
|
|
unsigned long long xcr0;
|
|
|
|
unsigned char reserved2[40];
|
|
|
|
/* The XSTATE_BV bit vector. */
|
|
unsigned long long xstate_bv;
|
|
|
|
unsigned char reserved3[56];
|
|
|
|
/* Space for eight upper 128-bit YMM values, or 16 on x86-64. */
|
|
unsigned char ymmh_space[256];
|
|
};
|
|
|
|
void
|
|
i387_cache_to_fsave (struct regcache *regcache, void *buf)
|
|
{
|
|
struct i387_fsave *fp = (struct i387_fsave *) buf;
|
|
int i;
|
|
int st0_regnum = find_regno (regcache->tdesc, "st0");
|
|
unsigned long val, val2;
|
|
|
|
for (i = 0; i < 8; i++)
|
|
collect_register (regcache, i + st0_regnum,
|
|
((char *) &fp->st_space[0]) + i * 10);
|
|
|
|
collect_register_by_name (regcache, "fioff", &fp->fioff);
|
|
collect_register_by_name (regcache, "fooff", &fp->fooff);
|
|
|
|
/* This one's 11 bits... */
|
|
collect_register_by_name (regcache, "fop", &val2);
|
|
fp->fop = (val2 & 0x7FF) | (fp->fop & 0xF800);
|
|
|
|
/* Some registers are 16-bit. */
|
|
collect_register_by_name (regcache, "fctrl", &val);
|
|
fp->fctrl = val;
|
|
|
|
collect_register_by_name (regcache, "fstat", &val);
|
|
val &= 0xFFFF;
|
|
fp->fstat = val;
|
|
|
|
collect_register_by_name (regcache, "ftag", &val);
|
|
val &= 0xFFFF;
|
|
fp->ftag = val;
|
|
|
|
collect_register_by_name (regcache, "fiseg", &val);
|
|
val &= 0xFFFF;
|
|
fp->fiseg = val;
|
|
|
|
collect_register_by_name (regcache, "foseg", &val);
|
|
val &= 0xFFFF;
|
|
fp->foseg = val;
|
|
}
|
|
|
|
void
|
|
i387_fsave_to_cache (struct regcache *regcache, const void *buf)
|
|
{
|
|
struct i387_fsave *fp = (struct i387_fsave *) buf;
|
|
int i;
|
|
int st0_regnum = find_regno (regcache->tdesc, "st0");
|
|
unsigned long val;
|
|
|
|
for (i = 0; i < 8; i++)
|
|
supply_register (regcache, i + st0_regnum,
|
|
((char *) &fp->st_space[0]) + i * 10);
|
|
|
|
supply_register_by_name (regcache, "fioff", &fp->fioff);
|
|
supply_register_by_name (regcache, "fooff", &fp->fooff);
|
|
|
|
/* Some registers are 16-bit. */
|
|
val = fp->fctrl & 0xFFFF;
|
|
supply_register_by_name (regcache, "fctrl", &val);
|
|
|
|
val = fp->fstat & 0xFFFF;
|
|
supply_register_by_name (regcache, "fstat", &val);
|
|
|
|
val = fp->ftag & 0xFFFF;
|
|
supply_register_by_name (regcache, "ftag", &val);
|
|
|
|
val = fp->fiseg & 0xFFFF;
|
|
supply_register_by_name (regcache, "fiseg", &val);
|
|
|
|
val = fp->foseg & 0xFFFF;
|
|
supply_register_by_name (regcache, "foseg", &val);
|
|
|
|
/* fop has only 11 valid bits. */
|
|
val = (fp->fop) & 0x7FF;
|
|
supply_register_by_name (regcache, "fop", &val);
|
|
}
|
|
|
|
void
|
|
i387_cache_to_fxsave (struct regcache *regcache, void *buf)
|
|
{
|
|
struct i387_fxsave *fp = (struct i387_fxsave *) buf;
|
|
int i;
|
|
int st0_regnum = find_regno (regcache->tdesc, "st0");
|
|
int xmm0_regnum = find_regno (regcache->tdesc, "xmm0");
|
|
unsigned long val, val2;
|
|
/* Amd64 has 16 xmm regs; I386 has 8 xmm regs. */
|
|
int num_xmm_registers = register_size (regcache->tdesc, 0) == 8 ? 16 : 8;
|
|
|
|
for (i = 0; i < 8; i++)
|
|
collect_register (regcache, i + st0_regnum,
|
|
((char *) &fp->st_space[0]) + i * 16);
|
|
for (i = 0; i < num_xmm_registers; i++)
|
|
collect_register (regcache, i + xmm0_regnum,
|
|
((char *) &fp->xmm_space[0]) + i * 16);
|
|
|
|
collect_register_by_name (regcache, "fioff", &fp->fioff);
|
|
collect_register_by_name (regcache, "fooff", &fp->fooff);
|
|
collect_register_by_name (regcache, "mxcsr", &fp->mxcsr);
|
|
|
|
/* This one's 11 bits... */
|
|
collect_register_by_name (regcache, "fop", &val2);
|
|
fp->fop = (val2 & 0x7FF) | (fp->fop & 0xF800);
|
|
|
|
/* Some registers are 16-bit. */
|
|
collect_register_by_name (regcache, "fctrl", &val);
|
|
fp->fctrl = val;
|
|
|
|
collect_register_by_name (regcache, "fstat", &val);
|
|
fp->fstat = val;
|
|
|
|
/* Convert to the simplifed tag form stored in fxsave data. */
|
|
collect_register_by_name (regcache, "ftag", &val);
|
|
val &= 0xFFFF;
|
|
val2 = 0;
|
|
for (i = 7; i >= 0; i--)
|
|
{
|
|
int tag = (val >> (i * 2)) & 3;
|
|
|
|
if (tag != 3)
|
|
val2 |= (1 << i);
|
|
}
|
|
fp->ftag = val2;
|
|
|
|
collect_register_by_name (regcache, "fiseg", &val);
|
|
fp->fiseg = val;
|
|
|
|
collect_register_by_name (regcache, "foseg", &val);
|
|
fp->foseg = val;
|
|
}
|
|
|
|
void
|
|
i387_cache_to_xsave (struct regcache *regcache, void *buf)
|
|
{
|
|
struct i387_xsave *fp = (struct i387_xsave *) buf;
|
|
int i;
|
|
unsigned long val, val2;
|
|
unsigned int clear_bv;
|
|
unsigned long long xstate_bv = 0;
|
|
char raw[16];
|
|
char *p;
|
|
/* Amd64 has 16 xmm regs; I386 has 8 xmm regs. */
|
|
int num_xmm_registers = register_size (regcache->tdesc, 0) == 8 ? 16 : 8;
|
|
|
|
/* The supported bits in `xstat_bv' are 1 byte. Clear part in
|
|
vector registers if its bit in xstat_bv is zero. */
|
|
clear_bv = (~fp->xstate_bv) & x86_xcr0;
|
|
|
|
/* Clear part in x87 and vector registers if its bit in xstat_bv is
|
|
zero. */
|
|
if (clear_bv)
|
|
{
|
|
if ((clear_bv & I386_XSTATE_X87))
|
|
for (i = 0; i < 8; i++)
|
|
memset (((char *) &fp->st_space[0]) + i * 16, 0, 10);
|
|
|
|
if ((clear_bv & I386_XSTATE_SSE))
|
|
for (i = 0; i < num_xmm_registers; i++)
|
|
memset (((char *) &fp->xmm_space[0]) + i * 16, 0, 16);
|
|
|
|
if ((clear_bv & I386_XSTATE_AVX))
|
|
for (i = 0; i < num_xmm_registers; i++)
|
|
memset (((char *) &fp->ymmh_space[0]) + i * 16, 0, 16);
|
|
}
|
|
|
|
/* Check if any x87 registers are changed. */
|
|
if ((x86_xcr0 & I386_XSTATE_X87))
|
|
{
|
|
int st0_regnum = find_regno (regcache->tdesc, "st0");
|
|
|
|
for (i = 0; i < 8; i++)
|
|
{
|
|
collect_register (regcache, i + st0_regnum, raw);
|
|
p = ((char *) &fp->st_space[0]) + i * 16;
|
|
if (memcmp (raw, p, 10))
|
|
{
|
|
xstate_bv |= I386_XSTATE_X87;
|
|
memcpy (p, raw, 10);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Check if any SSE registers are changed. */
|
|
if ((x86_xcr0 & I386_XSTATE_SSE))
|
|
{
|
|
int xmm0_regnum = find_regno (regcache->tdesc, "xmm0");
|
|
|
|
for (i = 0; i < num_xmm_registers; i++)
|
|
{
|
|
collect_register (regcache, i + xmm0_regnum, raw);
|
|
p = ((char *) &fp->xmm_space[0]) + i * 16;
|
|
if (memcmp (raw, p, 16))
|
|
{
|
|
xstate_bv |= I386_XSTATE_SSE;
|
|
memcpy (p, raw, 16);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Check if any AVX registers are changed. */
|
|
if ((x86_xcr0 & I386_XSTATE_AVX))
|
|
{
|
|
int ymm0h_regnum = find_regno (regcache->tdesc, "ymm0h");
|
|
|
|
for (i = 0; i < num_xmm_registers; i++)
|
|
{
|
|
collect_register (regcache, i + ymm0h_regnum, raw);
|
|
p = ((char *) &fp->ymmh_space[0]) + i * 16;
|
|
if (memcmp (raw, p, 16))
|
|
{
|
|
xstate_bv |= I386_XSTATE_AVX;
|
|
memcpy (p, raw, 16);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Update the corresponding bits in xstate_bv if any SSE/AVX
|
|
registers are changed. */
|
|
fp->xstate_bv |= xstate_bv;
|
|
|
|
collect_register_by_name (regcache, "fioff", &fp->fioff);
|
|
collect_register_by_name (regcache, "fooff", &fp->fooff);
|
|
collect_register_by_name (regcache, "mxcsr", &fp->mxcsr);
|
|
|
|
/* This one's 11 bits... */
|
|
collect_register_by_name (regcache, "fop", &val2);
|
|
fp->fop = (val2 & 0x7FF) | (fp->fop & 0xF800);
|
|
|
|
/* Some registers are 16-bit. */
|
|
collect_register_by_name (regcache, "fctrl", &val);
|
|
fp->fctrl = val;
|
|
|
|
collect_register_by_name (regcache, "fstat", &val);
|
|
fp->fstat = val;
|
|
|
|
/* Convert to the simplifed tag form stored in fxsave data. */
|
|
collect_register_by_name (regcache, "ftag", &val);
|
|
val &= 0xFFFF;
|
|
val2 = 0;
|
|
for (i = 7; i >= 0; i--)
|
|
{
|
|
int tag = (val >> (i * 2)) & 3;
|
|
|
|
if (tag != 3)
|
|
val2 |= (1 << i);
|
|
}
|
|
fp->ftag = val2;
|
|
|
|
collect_register_by_name (regcache, "fiseg", &val);
|
|
fp->fiseg = val;
|
|
|
|
collect_register_by_name (regcache, "foseg", &val);
|
|
fp->foseg = val;
|
|
}
|
|
|
|
static int
|
|
i387_ftag (struct i387_fxsave *fp, int regno)
|
|
{
|
|
unsigned char *raw = &fp->st_space[regno * 16];
|
|
unsigned int exponent;
|
|
unsigned long fraction[2];
|
|
int integer;
|
|
|
|
integer = raw[7] & 0x80;
|
|
exponent = (((raw[9] & 0x7f) << 8) | raw[8]);
|
|
fraction[0] = ((raw[3] << 24) | (raw[2] << 16) | (raw[1] << 8) | raw[0]);
|
|
fraction[1] = (((raw[7] & 0x7f) << 24) | (raw[6] << 16)
|
|
| (raw[5] << 8) | raw[4]);
|
|
|
|
if (exponent == 0x7fff)
|
|
{
|
|
/* Special. */
|
|
return (2);
|
|
}
|
|
else if (exponent == 0x0000)
|
|
{
|
|
if (fraction[0] == 0x0000 && fraction[1] == 0x0000 && !integer)
|
|
{
|
|
/* Zero. */
|
|
return (1);
|
|
}
|
|
else
|
|
{
|
|
/* Special. */
|
|
return (2);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (integer)
|
|
{
|
|
/* Valid. */
|
|
return (0);
|
|
}
|
|
else
|
|
{
|
|
/* Special. */
|
|
return (2);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
i387_fxsave_to_cache (struct regcache *regcache, const void *buf)
|
|
{
|
|
struct i387_fxsave *fp = (struct i387_fxsave *) buf;
|
|
int i, top;
|
|
int st0_regnum = find_regno (regcache->tdesc, "st0");
|
|
int xmm0_regnum = find_regno (regcache->tdesc, "xmm0");
|
|
unsigned long val;
|
|
/* Amd64 has 16 xmm regs; I386 has 8 xmm regs. */
|
|
int num_xmm_registers = register_size (regcache->tdesc, 0) == 8 ? 16 : 8;
|
|
|
|
for (i = 0; i < 8; i++)
|
|
supply_register (regcache, i + st0_regnum,
|
|
((char *) &fp->st_space[0]) + i * 16);
|
|
for (i = 0; i < num_xmm_registers; i++)
|
|
supply_register (regcache, i + xmm0_regnum,
|
|
((char *) &fp->xmm_space[0]) + i * 16);
|
|
|
|
supply_register_by_name (regcache, "fioff", &fp->fioff);
|
|
supply_register_by_name (regcache, "fooff", &fp->fooff);
|
|
supply_register_by_name (regcache, "mxcsr", &fp->mxcsr);
|
|
|
|
/* Some registers are 16-bit. */
|
|
val = fp->fctrl & 0xFFFF;
|
|
supply_register_by_name (regcache, "fctrl", &val);
|
|
|
|
val = fp->fstat & 0xFFFF;
|
|
supply_register_by_name (regcache, "fstat", &val);
|
|
|
|
/* Generate the form of ftag data that GDB expects. */
|
|
top = (fp->fstat >> 11) & 0x7;
|
|
val = 0;
|
|
for (i = 7; i >= 0; i--)
|
|
{
|
|
int tag;
|
|
if (fp->ftag & (1 << i))
|
|
tag = i387_ftag (fp, (i + 8 - top) % 8);
|
|
else
|
|
tag = 3;
|
|
val |= tag << (2 * i);
|
|
}
|
|
supply_register_by_name (regcache, "ftag", &val);
|
|
|
|
val = fp->fiseg & 0xFFFF;
|
|
supply_register_by_name (regcache, "fiseg", &val);
|
|
|
|
val = fp->foseg & 0xFFFF;
|
|
supply_register_by_name (regcache, "foseg", &val);
|
|
|
|
val = (fp->fop) & 0x7FF;
|
|
supply_register_by_name (regcache, "fop", &val);
|
|
}
|
|
|
|
void
|
|
i387_xsave_to_cache (struct regcache *regcache, const void *buf)
|
|
{
|
|
struct i387_xsave *fp = (struct i387_xsave *) buf;
|
|
struct i387_fxsave *fxp = (struct i387_fxsave *) buf;
|
|
int i, top;
|
|
unsigned long val;
|
|
unsigned int clear_bv;
|
|
gdb_byte *p;
|
|
/* Amd64 has 16 xmm regs; I386 has 8 xmm regs. */
|
|
int num_xmm_registers = register_size (regcache->tdesc, 0) == 8 ? 16 : 8;
|
|
|
|
/* The supported bits in `xstat_bv' are 1 byte. Clear part in
|
|
vector registers if its bit in xstat_bv is zero. */
|
|
clear_bv = (~fp->xstate_bv) & x86_xcr0;
|
|
|
|
/* Check if any x87 registers are changed. */
|
|
if ((x86_xcr0 & I386_XSTATE_X87) != 0)
|
|
{
|
|
int st0_regnum = find_regno (regcache->tdesc, "st0");
|
|
|
|
if ((clear_bv & I386_XSTATE_X87) != 0)
|
|
{
|
|
for (i = 0; i < 8; i++)
|
|
supply_register_zeroed (regcache, i + st0_regnum);
|
|
}
|
|
else
|
|
{
|
|
p = (gdb_byte *) &fp->st_space[0];
|
|
for (i = 0; i < 8; i++)
|
|
supply_register (regcache, i + st0_regnum, p + i * 16);
|
|
}
|
|
}
|
|
|
|
if ((x86_xcr0 & I386_XSTATE_SSE) != 0)
|
|
{
|
|
int xmm0_regnum = find_regno (regcache->tdesc, "xmm0");
|
|
|
|
if ((clear_bv & I386_XSTATE_SSE))
|
|
{
|
|
for (i = 0; i < num_xmm_registers; i++)
|
|
supply_register_zeroed (regcache, i + xmm0_regnum);
|
|
}
|
|
else
|
|
{
|
|
p = (gdb_byte *) &fp->xmm_space[0];
|
|
for (i = 0; i < num_xmm_registers; i++)
|
|
supply_register (regcache, i + xmm0_regnum, p + i * 16);
|
|
}
|
|
}
|
|
|
|
if ((x86_xcr0 & I386_XSTATE_AVX) != 0)
|
|
{
|
|
int ymm0h_regnum = find_regno (regcache->tdesc, "ymm0h");
|
|
|
|
if ((clear_bv & I386_XSTATE_AVX) != 0)
|
|
{
|
|
for (i = 0; i < num_xmm_registers; i++)
|
|
supply_register_zeroed (regcache, i + ymm0h_regnum);
|
|
}
|
|
else
|
|
{
|
|
p = (gdb_byte *) &fp->ymmh_space[0];
|
|
for (i = 0; i < num_xmm_registers; i++)
|
|
supply_register (regcache, i + ymm0h_regnum, p + i * 16);
|
|
}
|
|
}
|
|
|
|
supply_register_by_name (regcache, "fioff", &fp->fioff);
|
|
supply_register_by_name (regcache, "fooff", &fp->fooff);
|
|
supply_register_by_name (regcache, "mxcsr", &fp->mxcsr);
|
|
|
|
/* Some registers are 16-bit. */
|
|
val = fp->fctrl & 0xFFFF;
|
|
supply_register_by_name (regcache, "fctrl", &val);
|
|
|
|
val = fp->fstat & 0xFFFF;
|
|
supply_register_by_name (regcache, "fstat", &val);
|
|
|
|
/* Generate the form of ftag data that GDB expects. */
|
|
top = (fp->fstat >> 11) & 0x7;
|
|
val = 0;
|
|
for (i = 7; i >= 0; i--)
|
|
{
|
|
int tag;
|
|
if (fp->ftag & (1 << i))
|
|
tag = i387_ftag (fxp, (i + 8 - top) % 8);
|
|
else
|
|
tag = 3;
|
|
val |= tag << (2 * i);
|
|
}
|
|
supply_register_by_name (regcache, "ftag", &val);
|
|
|
|
val = fp->fiseg & 0xFFFF;
|
|
supply_register_by_name (regcache, "fiseg", &val);
|
|
|
|
val = fp->foseg & 0xFFFF;
|
|
supply_register_by_name (regcache, "foseg", &val);
|
|
|
|
val = (fp->fop) & 0x7FF;
|
|
supply_register_by_name (regcache, "fop", &val);
|
|
}
|
|
|
|
/* Default to SSE. */
|
|
unsigned long long x86_xcr0 = I386_XSTATE_SSE_MASK;
|