From patchwork Fri Mar 6 21:31:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tankut Baris Aktemur X-Patchwork-Id: 38488 Received: (qmail 51007 invoked by alias); 6 Mar 2020 21:32:25 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Delivered-To: mailing list gdb-patches@sourceware.org Received: (qmail 50735 invoked by uid 89); 6 Mar 2020 21:32:23 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-25.5 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3 autolearn=ham version=3.3.1 spammy=1966, sk:arm_bre, 2297, 2296 X-HELO: mga03.intel.com Received: from mga03.intel.com (HELO mga03.intel.com) (134.134.136.65) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Fri, 06 Mar 2020 21:32:19 +0000 Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Mar 2020 13:32:18 -0800 Received: from irvmail001.ir.intel.com ([163.33.26.43]) by orsmga004.jf.intel.com with ESMTP; 06 Mar 2020 13:32:17 -0800 Received: from ulvlx001.iul.intel.com (ulvlx001.iul.intel.com [172.28.207.17]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id 026LWG3V022443; Fri, 6 Mar 2020 21:32:16 GMT Received: from ulvlx001.iul.intel.com (localhost [127.0.0.1]) by ulvlx001.iul.intel.com with ESMTP id 026LWGex020390; Fri, 6 Mar 2020 22:32:16 +0100 Received: (from taktemur@localhost) by ulvlx001.iul.intel.com with LOCAL id 026LWGsK020386; Fri, 6 Mar 2020 22:32:16 +0100 From: Tankut Baris Aktemur To: gdb-patches@sourceware.org Subject: [PATCH 07/31] gdbserver/linux-low: turn 'fetch_register' into a method Date: Fri, 6 Mar 2020 22:31:15 +0100 Message-Id: In-Reply-To: References: In-Reply-To: References: X-IsSubscribed: yes gdbserver/ChangeLog: 2020-03-06 Tankut Baris Aktemur Turn the 'fetch_register' linux target op into a method of linux_process_target. * linux-low.h (struct linux_target_ops) : Remove. (class linux_process_target) : Declare. * linux-x86-low.cc (the_low_target) * linux-aarch64-low.cc (the_low_target) * linux-arm-low.cc (the_low_target) * linux-bfin-low.cc (the_low_target) * linux-cris-low.cc (the_low_target) * linux-crisv32-low.cc (the_low_target) * linux-m32r-low.cc (the_low_target) * linux-m68k-low.cc (the_low_target) * linux-nios2-low.cc (the_low_target) * linux-ppc-low.cc (the_low_target) * linux-s390-low.cc (the_low_target) * linux-sh-low.cc (the_low_target) * linux-sparc-low.cc (the_low_target) * linux-tic6x-low.cc (the_low_target) * linux-tile-low.cc (the_low_target) * linux-xtensa-low.cc (the_low_target): Remove the op field. * linux-ia64-low.cc (class ia64_target) : Declare. (ia64_fetch_register): Turn into... (ia64_target::low_fetch_register): ...this. (the_low_target): Remove the op field. * linux-mips-low.cc (class mips_target) : Declare. (mips_fetch_register): Turn into... (mips_target::low_fetch_register): ...this. (the_low_target): Remove the op field. * linux-riscv-low.cc (class riscv_target) : Declare. (riscv_fetch_register): Turn into... (riscv_target::low_fetch_register): ...this. (the_low_target): Remove the op field. Update the callers below. * linux-low.cc (linux_process_target::fetch_registers) (linux_process_target::low_fetch_register) --- gdbserver/linux-aarch64-low.cc | 1 - gdbserver/linux-arm-low.cc | 1 - gdbserver/linux-bfin-low.cc | 1 - gdbserver/linux-cris-low.cc | 1 - gdbserver/linux-crisv32-low.cc | 1 - gdbserver/linux-ia64-low.cc | 15 ++++++++------- gdbserver/linux-low.cc | 13 ++++++++----- gdbserver/linux-low.h | 14 +++++++------- gdbserver/linux-m32r-low.cc | 1 - gdbserver/linux-m68k-low.cc | 1 - gdbserver/linux-mips-low.cc | 11 ++++++----- gdbserver/linux-nios2-low.cc | 1 - gdbserver/linux-ppc-low.cc | 1 - gdbserver/linux-riscv-low.cc | 13 +++++++------ gdbserver/linux-s390-low.cc | 1 - gdbserver/linux-sh-low.cc | 1 - gdbserver/linux-sparc-low.cc | 1 - gdbserver/linux-tic6x-low.cc | 1 - gdbserver/linux-tile-low.cc | 1 - gdbserver/linux-x86-low.cc | 1 - gdbserver/linux-xtensa-low.cc | 1 - 21 files changed, 36 insertions(+), 46 deletions(-) diff --git a/gdbserver/linux-aarch64-low.cc b/gdbserver/linux-aarch64-low.cc index 19484219d73..0bcac19384a 100644 --- a/gdbserver/linux-aarch64-low.cc +++ b/gdbserver/linux-aarch64-low.cc @@ -3085,7 +3085,6 @@ aarch64_supports_hardware_single_step (void) struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ aarch64_get_pc, aarch64_set_pc, aarch64_breakpoint_kind_from_pc, diff --git a/gdbserver/linux-arm-low.cc b/gdbserver/linux-arm-low.cc index 896c5fd1e64..1bbf0e6977f 100644 --- a/gdbserver/linux-arm-low.cc +++ b/gdbserver/linux-arm-low.cc @@ -1027,7 +1027,6 @@ arm_target::get_regs_info () } struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ linux_get_pc_32bit, linux_set_pc_32bit, arm_breakpoint_kind_from_pc, diff --git a/gdbserver/linux-bfin-low.cc b/gdbserver/linux-bfin-low.cc index e7cd1e29637..a8bb8f03ce0 100644 --- a/gdbserver/linux-bfin-low.cc +++ b/gdbserver/linux-bfin-low.cc @@ -135,7 +135,6 @@ bfin_target::get_regs_info () } struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ linux_get_pc_32bit, linux_set_pc_32bit, NULL, /* breakpoint_kind_from_pc */ diff --git a/gdbserver/linux-cris-low.cc b/gdbserver/linux-cris-low.cc index 03ca52e39e4..7956922f7e5 100644 --- a/gdbserver/linux-cris-low.cc +++ b/gdbserver/linux-cris-low.cc @@ -132,7 +132,6 @@ cris_target::get_regs_info () } struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ linux_get_pc_32bit, linux_set_pc_32bit, NULL, /* breakpoint_kind_from_pc */ diff --git a/gdbserver/linux-crisv32-low.cc b/gdbserver/linux-crisv32-low.cc index 03f0aa138e2..828ac111d10 100644 --- a/gdbserver/linux-crisv32-low.cc +++ b/gdbserver/linux-crisv32-low.cc @@ -429,7 +429,6 @@ crisv32_target::get_regs_info () } struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ linux_get_pc_32bit, linux_set_pc_32bit, NULL, /* breakpoint_kind_from_pc */ diff --git a/gdbserver/linux-ia64-low.cc b/gdbserver/linux-ia64-low.cc index 471530a621b..377df4f75c3 100644 --- a/gdbserver/linux-ia64-low.cc +++ b/gdbserver/linux-ia64-low.cc @@ -38,6 +38,8 @@ protected: bool low_cannot_fetch_register (int regno) override; bool low_cannot_store_register (int regno) override; + + bool low_fetch_register (regcache *regcache, int regno) override; }; /* The singleton target ops object. */ @@ -304,8 +306,8 @@ ia64_target::low_cannot_fetch_register (int regno) #define IA64_FR0_REGNUM 128 #define IA64_FR1_REGNUM 129 -static int -ia64_fetch_register (struct regcache *regcache, int regnum) +bool +ia64_target::low_fetch_register (regcache *regcache, int regnum) { /* r0 cannot be fetched but is always zero. */ if (regnum == IA64_GR0_REGNUM) @@ -314,7 +316,7 @@ ia64_fetch_register (struct regcache *regcache, int regnum) gdb_assert (sizeof (zero) == register_size (regcache->tdesc, regnum)); supply_register (regcache, regnum, zero); - return 1; + return true; } /* fr0 cannot be fetched but is always zero. */ @@ -324,7 +326,7 @@ ia64_fetch_register (struct regcache *regcache, int regnum) gdb_assert (sizeof (f_zero) == register_size (regcache->tdesc, regnum)); supply_register (regcache, regnum, f_zero); - return 1; + return true; } /* fr1 cannot be fetched but is always one (1.0). */ @@ -335,10 +337,10 @@ ia64_fetch_register (struct regcache *regcache, int regnum) gdb_assert (sizeof (f_one) == register_size (regcache->tdesc, regnum)); supply_register (regcache, regnum, f_one); - return 1; + return true; } - return 0; + return false; } static struct usrregs_info ia64_usrregs_info = @@ -367,7 +369,6 @@ ia64_target::low_arch_setup () struct linux_target_ops the_low_target = { - ia64_fetch_register, }; /* The linux target ops object. */ diff --git a/gdbserver/linux-low.cc b/gdbserver/linux-low.cc index caa2d8dbd58..c77e92d17b1 100644 --- a/gdbserver/linux-low.cc +++ b/gdbserver/linux-low.cc @@ -5569,10 +5569,9 @@ linux_process_target::fetch_registers (regcache *regcache, int regno) if (regno == -1) { - if (the_low_target.fetch_register != NULL - && regs_info->usrregs != NULL) + if (regs_info->usrregs != NULL) for (regno = 0; regno < regs_info->usrregs->num_regs; regno++) - (*the_low_target.fetch_register) (regcache, regno); + low_fetch_register (regcache, regno); all = regsets_fetch_inferior_registers (regs_info->regsets_info, regcache); if (regs_info->usrregs != NULL) @@ -5580,8 +5579,7 @@ linux_process_target::fetch_registers (regcache *regcache, int regno) } else { - if (the_low_target.fetch_register != NULL - && (*the_low_target.fetch_register) (regcache, regno)) + if (low_fetch_register (regcache, regno)) return; use_regsets = linux_register_in_regsets (regs_info, regno); @@ -5618,6 +5616,11 @@ linux_process_target::store_registers (regcache *regcache, int regno) } } +bool +linux_process_target::low_fetch_register (regcache *regcache, int regno) +{ + return false; +} /* A wrapper for the read_memory target op. */ diff --git a/gdbserver/linux-low.h b/gdbserver/linux-low.h index 65c570e0669..7ac9086fb99 100644 --- a/gdbserver/linux-low.h +++ b/gdbserver/linux-low.h @@ -131,13 +131,6 @@ struct lwp_info; struct linux_target_ops { - /* Hook to fetch a register in some non-standard way. Used for - example by backends that have read-only registers with hardcoded - values (e.g., IA64's gr0/fr0/fr1). Returns true if register - REGNO was supplied, false if not, and we should fallback to the - standard ptrace methods. */ - int (*fetch_register) (struct regcache *regcache, int regno); - CORE_ADDR (*get_pc) (struct regcache *regcache); void (*set_pc) (struct regcache *regcache, CORE_ADDR newpc); @@ -598,6 +591,13 @@ class linux_process_target : public process_stratum_target virtual bool low_cannot_fetch_register (int regno) = 0; virtual bool low_cannot_store_register (int regno) = 0; + + /* Hook to fetch a register in some non-standard way. Used for + example by backends that have read-only registers with hardcoded + values (e.g., IA64's gr0/fr0/fr1). Returns true if register + REGNO was supplied, false if not, and we should fallback to the + standard ptrace methods. */ + virtual bool low_fetch_register (regcache *regcache, int regno); }; extern linux_process_target *the_linux_target; diff --git a/gdbserver/linux-m32r-low.cc b/gdbserver/linux-m32r-low.cc index 912708db817..82a503401b8 100644 --- a/gdbserver/linux-m32r-low.cc +++ b/gdbserver/linux-m32r-low.cc @@ -134,7 +134,6 @@ m32r_target::get_regs_info () } struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ linux_get_pc_32bit, linux_set_pc_32bit, NULL, /* breakpoint_from_pc */ diff --git a/gdbserver/linux-m68k-low.cc b/gdbserver/linux-m68k-low.cc index 08545aa946f..6a3a2aab383 100644 --- a/gdbserver/linux-m68k-low.cc +++ b/gdbserver/linux-m68k-low.cc @@ -229,7 +229,6 @@ m68k_supports_hardware_single_step (void) } struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ linux_get_pc_32bit, linux_set_pc_32bit, NULL, /* breakpoint_kind_from_pc */ diff --git a/gdbserver/linux-mips-low.cc b/gdbserver/linux-mips-low.cc index 0900dc88e0b..ae925ffb6cc 100644 --- a/gdbserver/linux-mips-low.cc +++ b/gdbserver/linux-mips-low.cc @@ -40,6 +40,8 @@ protected: bool low_cannot_fetch_register (int regno) override; bool low_cannot_store_register (int regno) override; + + bool low_fetch_register (regcache *regcache, int regno) override; }; /* The singleton target ops object. */ @@ -263,18 +265,18 @@ mips_target::low_cannot_store_register (int regno) return false; } -static int -mips_fetch_register (struct regcache *regcache, int regno) +bool +mips_target::low_fetch_register (regcache *regcache, int regno) { const struct target_desc *tdesc = current_process ()->tdesc; if (find_regno (tdesc, "r0") == regno) { supply_register_zeroed (regcache, regno); - return 1; + return true; } - return 0; + return false; } static CORE_ADDR @@ -950,7 +952,6 @@ mips_target::get_regs_info () } struct linux_target_ops the_low_target = { - mips_fetch_register, mips_get_pc, mips_set_pc, NULL, /* breakpoint_kind_from_pc */ diff --git a/gdbserver/linux-nios2-low.cc b/gdbserver/linux-nios2-low.cc index adbb0f2622e..a58d9ca99fb 100644 --- a/gdbserver/linux-nios2-low.cc +++ b/gdbserver/linux-nios2-low.cc @@ -251,7 +251,6 @@ nios2_target::get_regs_info () struct linux_target_ops the_low_target = { - NULL, linux_get_pc_32bit, linux_set_pc_32bit, NULL, /* breakpoint_kind_from_pc */ diff --git a/gdbserver/linux-ppc-low.cc b/gdbserver/linux-ppc-low.cc index 968538df370..096308a44d8 100644 --- a/gdbserver/linux-ppc-low.cc +++ b/gdbserver/linux-ppc-low.cc @@ -3392,7 +3392,6 @@ ppc_get_ipa_tdesc_idx (void) } struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ ppc_get_pc, ppc_set_pc, NULL, /* breakpoint_kind_from_pc */ diff --git a/gdbserver/linux-riscv-low.cc b/gdbserver/linux-riscv-low.cc index 4f2e28beafc..69af59f7200 100644 --- a/gdbserver/linux-riscv-low.cc +++ b/gdbserver/linux-riscv-low.cc @@ -45,6 +45,8 @@ protected: bool low_cannot_fetch_register (int regno) override; bool low_cannot_store_register (int regno) override; + + bool low_fetch_register (regcache *regcache, int regno) override; }; /* The singleton target ops object. */ @@ -188,17 +190,17 @@ riscv_target::get_regs_info () return &riscv_regs; } -/* Implementation of linux_target_ops method "fetch_register". */ +/* Implementation of linux target ops method "low_fetch_register". */ -static int -riscv_fetch_register (struct regcache *regcache, int regno) +bool +riscv_target::low_fetch_register (regcache *regcache, int regno) { const struct target_desc *tdesc = regcache->tdesc; if (regno != find_regno (tdesc, "zero")) - return 0; + return false; supply_register_zeroed (regcache, regno); - return 1; + return true; } /* Implementation of linux_target_ops method "get_pc". */ @@ -291,7 +293,6 @@ riscv_breakpoint_at (CORE_ADDR pc) /* RISC-V/Linux target operations. */ struct linux_target_ops the_low_target = { - riscv_fetch_register, riscv_get_pc, riscv_set_pc, riscv_breakpoint_kind_from_pc, diff --git a/gdbserver/linux-s390-low.cc b/gdbserver/linux-s390-low.cc index 2ba0dec0551..d25fafa4cdf 100644 --- a/gdbserver/linux-s390-low.cc +++ b/gdbserver/linux-s390-low.cc @@ -2812,7 +2812,6 @@ s390_emit_ops (void) } struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ s390_get_pc, s390_set_pc, NULL, /* breakpoint_kind_from_pc */ diff --git a/gdbserver/linux-sh-low.cc b/gdbserver/linux-sh-low.cc index b4fd534547e..42bd427d47c 100644 --- a/gdbserver/linux-sh-low.cc +++ b/gdbserver/linux-sh-low.cc @@ -164,7 +164,6 @@ sh_target::low_arch_setup () } struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ linux_get_pc_32bit, linux_set_pc_32bit, NULL, /* breakpoint_kind_from_pc */ diff --git a/gdbserver/linux-sparc-low.cc b/gdbserver/linux-sparc-low.cc index 4e0d930f800..b68ed2d36ad 100644 --- a/gdbserver/linux-sparc-low.cc +++ b/gdbserver/linux-sparc-low.cc @@ -319,7 +319,6 @@ sparc_target::get_regs_info () } struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ linux_get_pc_64bit, /* No sparc_set_pc is needed. */ NULL, diff --git a/gdbserver/linux-tic6x-low.cc b/gdbserver/linux-tic6x-low.cc index be6eb98b45c..5cfdd091c38 100644 --- a/gdbserver/linux-tic6x-low.cc +++ b/gdbserver/linux-tic6x-low.cc @@ -407,7 +407,6 @@ tic6x_target::get_regs_info () } struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ tic6x_get_pc, tic6x_set_pc, NULL, /* breakpoint_kind_from_pc */ diff --git a/gdbserver/linux-tile-low.cc b/gdbserver/linux-tile-low.cc index b9af7af7fb5..a6138e78aa7 100644 --- a/gdbserver/linux-tile-low.cc +++ b/gdbserver/linux-tile-low.cc @@ -196,7 +196,6 @@ tile_supports_hardware_single_step (void) struct linux_target_ops the_low_target = { - NULL, linux_get_pc_64bit, linux_set_pc_64bit, NULL, /* breakpoint_kind_from_pc */ diff --git a/gdbserver/linux-x86-low.cc b/gdbserver/linux-x86-low.cc index 8c9ab733ea8..475d77767f5 100644 --- a/gdbserver/linux-x86-low.cc +++ b/gdbserver/linux-x86-low.cc @@ -2885,7 +2885,6 @@ x86_get_ipa_tdesc_idx (void) struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ x86_get_pc, x86_set_pc, NULL, /* breakpoint_kind_from_pc */ diff --git a/gdbserver/linux-xtensa-low.cc b/gdbserver/linux-xtensa-low.cc index 876c2ad63e0..d71b2c97fa4 100644 --- a/gdbserver/linux-xtensa-low.cc +++ b/gdbserver/linux-xtensa-low.cc @@ -302,7 +302,6 @@ xtensa_target::get_regs_info () } struct linux_target_ops the_low_target = { - NULL, /* fetch_register */ linux_get_pc_32bit, linux_set_pc_32bit, NULL, /* breakpoint_kind_from_pc */