mirror of
https://sourceware.org/git/binutils-gdb.git
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13db4a0c4d
During the development of 40c23d8803,
the return value of fbsd_nat_target::have_regset was changed from a
simple boolean to returning the size of the register set. The
comments and callers were all updated for this change, but the actual
return type was accidentally left as a bool. This change fixes the
return type to be a size_t.
Current callers of this only checked the value against 0 and thus
still worked correctly.
220 lines
6.9 KiB
C++
220 lines
6.9 KiB
C++
/* Native-dependent code for FreeBSD.
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Copyright (C) 2004-2022 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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#ifndef FBSD_NAT_H
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#define FBSD_NAT_H
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#include "inf-ptrace.h"
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#include "regcache.h"
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#include "regset.h"
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#include <osreldate.h>
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#include <sys/proc.h>
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/* FreeBSD kernels 11.3 and later report valid si_code values for
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SIGTRAP on all architectures. Older FreeBSD kernels that supported
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TRAP_BRKPT did not report valid values for MIPS and sparc64. Even
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older kernels without TRAP_BRKPT support did not report valid
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values on any architecture. */
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#if (__FreeBSD_kernel_version >= 1102502) || (__FreeBSD_version >= 1102502)
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# define USE_SIGTRAP_SIGINFO
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#elif defined(TRAP_BRKPT)
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# if !defined(__mips__) && !defined(__sparc64__)
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# define USE_SIGTRAP_SIGINFO
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# endif
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#endif
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/* A prototype FreeBSD target. */
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class fbsd_nat_target : public inf_ptrace_target
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{
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public:
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const char *pid_to_exec_file (int pid) override;
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int find_memory_regions (find_memory_region_ftype func, void *data) override;
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bool info_proc (const char *, enum info_proc_what) override;
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enum target_xfer_status xfer_partial (enum target_object object,
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const char *annex,
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gdb_byte *readbuf,
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const gdb_byte *writebuf,
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ULONGEST offset, ULONGEST len,
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ULONGEST *xfered_len) override;
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bool thread_alive (ptid_t ptid) override;
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std::string pid_to_str (ptid_t) override;
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#ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME
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const char *thread_name (struct thread_info *) override;
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#endif
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void update_thread_list () override;
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bool can_async_p () override;
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void async (bool) override;
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thread_control_capabilities get_thread_control_capabilities () override
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{ return tc_schedlock; }
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void create_inferior (const char *, const std::string &,
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char **, int) override;
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void resume (ptid_t, int, enum gdb_signal) override;
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ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override;
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void post_attach (int) override;
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#ifdef USE_SIGTRAP_SIGINFO
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bool supports_stopped_by_sw_breakpoint () override;
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bool stopped_by_sw_breakpoint () override;
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#endif
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#ifdef TDP_RFPPWAIT
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void follow_fork (inferior *, ptid_t, target_waitkind, bool, bool) override;
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int insert_fork_catchpoint (int) override;
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int remove_fork_catchpoint (int) override;
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int insert_vfork_catchpoint (int) override;
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int remove_vfork_catchpoint (int) override;
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#endif
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int insert_exec_catchpoint (int) override;
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int remove_exec_catchpoint (int) override;
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#ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE
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int set_syscall_catchpoint (int, bool, int, gdb::array_view<const int>)
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override;
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#endif
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bool supports_multi_process () override;
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bool supports_disable_randomization () override;
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/* Methods meant to be overridden by arch-specific target
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classes. */
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virtual void low_new_fork (ptid_t parent, pid_t child)
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{}
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/* The method to call, if any, when a thread is destroyed. */
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virtual void low_delete_thread (thread_info *)
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{}
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/* Hook to call prior to resuming a thread. */
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virtual void low_prepare_to_resume (thread_info *)
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{}
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protected:
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void post_startup_inferior (ptid_t) override;
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private:
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ptid_t wait_1 (ptid_t, struct target_waitstatus *, target_wait_flags);
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/* Helper routines for use in fetch_registers and store_registers in
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subclasses. These routines fetch and store a single set of
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registers described by REGSET. The REGSET's 'regmap' field must
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point to an array of 'struct regcache_map_entry'.
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FETCH_OP is a ptrace operation to fetch the set of registers from
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a native thread. STORE_OP is a ptrace operation to store the set
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of registers to a native thread.
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The caller must provide storage for the set of registers in REGS,
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and SIZE is the size of the storage.
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Returns true if the register set was transferred due to a
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matching REGNUM.*/
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bool fetch_register_set (struct regcache *regcache, int regnum, int fetch_op,
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const struct regset *regset, void *regs, size_t size);
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bool store_register_set (struct regcache *regcache, int regnum, int fetch_op,
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int store_op, const struct regset *regset,
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void *regs, size_t size);
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/* Helper routines which use PT_GETREGSET and PT_SETREGSET for the
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specified NOTE instead of regset-specific fetch and store
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ops. */
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bool fetch_regset (struct regcache *regcache, int regnum, int note,
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const struct regset *regset, void *regs, size_t size);
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bool store_regset (struct regcache *regcache, int regnum, int note,
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const struct regset *regset, void *regs, size_t size);
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protected:
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/* Wrapper versions of the above helpers which accept a register set
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type such as 'struct reg' or 'struct fpreg'. */
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template <class Regset>
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bool fetch_register_set (struct regcache *regcache, int regnum, int fetch_op,
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const struct regset *regset)
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{
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Regset regs;
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return fetch_register_set (regcache, regnum, fetch_op, regset, ®s,
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sizeof (regs));
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}
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template <class Regset>
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bool store_register_set (struct regcache *regcache, int regnum, int fetch_op,
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int store_op, const struct regset *regset)
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{
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Regset regs;
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return store_register_set (regcache, regnum, fetch_op, store_op, regset,
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®s, sizeof (regs));
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}
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/* Helper routine for use in read_description in subclasses. This
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routine checks if the register set for the specified NOTE is
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present for a given PTID. If the register set is present, the
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the size of the register set is returned. If the register set is
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not present, zero is returned. */
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size_t have_regset (ptid_t ptid, int note);
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/* Wrapper versions of the PT_GETREGSET and PT_REGSET helpers which
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accept a register set type. */
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template <class Regset>
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bool fetch_regset (struct regcache *regcache, int regnum, int note,
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const struct regset *regset)
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{
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Regset regs;
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return fetch_regset (regcache, regnum, note, regset, ®s, sizeof (regs));
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}
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template <class Regset>
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bool store_regset (struct regcache *regcache, int regnum, int note,
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const struct regset *regset)
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{
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Regset regs;
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return store_regset (regcache, regnum, note, regset, ®s, sizeof (regs));
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}
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};
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/* Fetch the signal information for PTID and store it in *SIGINFO.
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Return true if successful. */
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bool fbsd_nat_get_siginfo (ptid_t ptid, siginfo_t *siginfo);
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#endif /* fbsd-nat.h */
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