* ppc-linux-nat.c (PTRACE_GET_DEBUGREG, PTRACE_SET_DEBUGREG,
PTRACE_GETSIGINFO): Define. (last_stopped_data_address): New. (ppc_linux_check_watch_resources): New function. (ppc_linux_region_ok_for_hw_watchpoint): New function. (ppc_linux_insert_watchpoint): New function. (ppc_linux_remove_watchpoint): New function. (ppc_linux_stopped_data_address): New function. (ppc_linux_stopped_by_watchpoint): New function. (_initialize_ppc_linux_nat): Set the above hardware watchpoint related target vectors. * rs6000-tdep.c (rs6000_gdbarch_init): Set PPC architectures to have nonsteppable watchpoint. * target.c (default_region_ok_for_hw_watchpoint, debug_to_region_ok_for_hw_watchpoint): New prototypes. (update_current_target): Inherit to_region_ok_for_hw_watchpoint and set default to_region_ok_for_hw_watchpoint. (default_region_ok_for_hw_watchpoint): New function. (debug_to_region_ok_for_hw_watchpoint): New function. (setup_target_debug): Set to_region_ok_for_hw_watchpoint of debug_target. * target.h (struct target_ops): Add a new target vector to_region_ok_for_hw_watchpoint. (TARGET_REGION_OK_FOR_HW_WATCHPOINT): Define this if it is not defined anyplace else.
This commit is contained in:
Wu Zhou
parent
0d2a638963
commit
e0d24f8d6e
5 changed files with 203 additions and 2 deletions
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@ -1,5 +1,33 @@
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2005-02-07 Joel Brobecker <brobecker@adacore.com>
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2006-02-08 Ben Elliston <bje@au1.ibm.com>
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Wu Zhou <woodzltc@cn.ibm.com>
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* ppc-linux-nat.c (PTRACE_GET_DEBUGREG, PTRACE_SET_DEBUGREG,
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PTRACE_GETSIGINFO): Define.
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(last_stopped_data_address): New.
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(ppc_linux_check_watch_resources): New function.
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(ppc_linux_region_ok_for_hw_watchpoint): New function.
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(ppc_linux_insert_watchpoint): New function.
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(ppc_linux_remove_watchpoint): New function.
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(ppc_linux_stopped_data_address): New function.
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(ppc_linux_stopped_by_watchpoint): New function.
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(_initialize_ppc_linux_nat): Set the above hardware watchpoint
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related target vectors.
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* rs6000-tdep.c (rs6000_gdbarch_init): Set PPC architectures
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to have nonsteppable watchpoint.
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* target.c (default_region_ok_for_hw_watchpoint,
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debug_to_region_ok_for_hw_watchpoint): New prototypes.
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(update_current_target): Inherit to_region_ok_for_hw_watchpoint
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and set default to_region_ok_for_hw_watchpoint.
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(default_region_ok_for_hw_watchpoint): New function.
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(debug_to_region_ok_for_hw_watchpoint): New function.
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(setup_target_debug): Set to_region_ok_for_hw_watchpoint of
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debug_target.
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* target.h (struct target_ops): Add a new target vector
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to_region_ok_for_hw_watchpoint.
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(TARGET_REGION_OK_FOR_HW_WATCHPOINT): Define this if it is not
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defined anyplace else.
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2005-02-07 Joel Brobecker <brobecker@adacore.com>
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* symfile.c (add_symbol_file_command): Abort if the user forgot
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to provide the address when the file has been loaded.
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@ -81,6 +81,16 @@
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#define PTRACE_SETEVRREGS 21
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#endif
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/* Similarly for the hardware watchpoint support. */
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#ifndef PTRACE_GET_DEBUGREG
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#define PTRACE_GET_DEBUGREG 25
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#endif
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#ifndef PTRACE_SET_DEBUGREG
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#define PTRACE_SET_DEBUGREG 26
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#endif
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#ifndef PTRACE_GETSIGINFO
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#define PTRACE_GETSIGINFO 0x4202
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#endif
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/* This oddity is because the Linux kernel defines elf_vrregset_t as
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an array of 33 16 bytes long elements. I.e. it leaves out vrsave.
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@ -146,6 +156,7 @@ struct gdb_evrregset_t
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error. */
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int have_ptrace_getvrregs = 1;
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static CORE_ADDR last_stopped_data_address = 0;
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/* Non-zero if our kernel may support the PTRACE_GETEVRREGS and
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PTRACE_SETEVRREGS requests, for reading and writing the SPE
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@ -153,7 +164,6 @@ int have_ptrace_getvrregs = 1;
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error. */
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int have_ptrace_getsetevrregs = 1;
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int
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kernel_u_size (void)
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{
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@ -777,6 +787,124 @@ store_ppc_registers (int tid)
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store_spe_register (tid, -1);
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}
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static int
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ppc_linux_check_watch_resources (int type, int cnt, int ot)
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{
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int tid;
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ptid_t ptid = inferior_ptid;
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/* DABR (data address breakpoint register) is optional for PPC variants.
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Some variants have one DABR, others have none. So CNT can't be larger
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than 1. */
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if (cnt > 1)
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return 0;
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/* We need to know whether ptrace supports PTRACE_SET_DEBUGREG and whether
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the target has DABR. If either answer is no, the ptrace call will
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return -1. Fail in that case. */
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tid = TIDGET (ptid);
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if (tid == 0)
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tid = PIDGET (ptid);
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if (ptrace (PTRACE_SET_DEBUGREG, tid, 0, 0) == -1)
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return 0;
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return 1;
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}
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static int
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ppc_linux_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
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{
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/* Handle sub-8-byte quantities. */
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if (len <= 0)
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return 0;
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/* addr+len must fall in the 8 byte watchable region. */
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if ((addr + len) > (addr & ~7) + 8)
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return 0;
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return 1;
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}
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/* Set a watchpoint of type TYPE at address ADDR. */
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static long
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ppc_linux_insert_watchpoint (CORE_ADDR addr, int len, int rw)
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{
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int tid;
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long dabr_value;
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ptid_t ptid = inferior_ptid;
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dabr_value = addr & ~7;
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switch (rw)
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{
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case hw_read:
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/* Set read and translate bits. */
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dabr_value |= 5;
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break;
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case hw_write:
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/* Set write and translate bits. */
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dabr_value |= 6;
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break;
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case hw_access:
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/* Set read, write and translate bits. */
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dabr_value |= 7;
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break;
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}
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tid = TIDGET (ptid);
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if (tid == 0)
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tid = PIDGET (ptid);
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return ptrace (PTRACE_SET_DEBUGREG, tid, 0, dabr_value);
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}
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static long
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ppc_linux_remove_watchpoint (CORE_ADDR addr, int len)
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{
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int tid;
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ptid_t ptid = inferior_ptid;
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tid = TIDGET (ptid);
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if (tid == 0)
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tid = PIDGET (ptid);
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return ptrace (PTRACE_SET_DEBUGREG, tid, 0, 0);
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}
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static int
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ppc_linux_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
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{
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if (last_stopped_data_address)
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{
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*addr_p = last_stopped_data_address;
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last_stopped_data_address = 0;
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return 1;
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}
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return 0;
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}
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static int
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ppc_linux_stopped_by_watchpoint (void)
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{
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int tid;
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struct siginfo siginfo;
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ptid_t ptid = inferior_ptid;
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CORE_ADDR *addr_p;
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tid = TIDGET(ptid);
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if (tid == 0)
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tid = PIDGET (ptid);
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errno = 0;
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ptrace (PTRACE_GETSIGINFO, tid, (PTRACE_TYPE_ARG3) 0, &siginfo);
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if (errno != 0 || siginfo.si_signo != SIGTRAP ||
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(siginfo.si_code & 0xffff) != 0x0004)
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return 0;
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last_stopped_data_address = (CORE_ADDR) siginfo.si_addr;
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return 1;
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}
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static void
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ppc_linux_store_inferior_registers (int regno)
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{
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@ -900,6 +1028,14 @@ _initialize_ppc_linux_nat (void)
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t->to_fetch_registers = ppc_linux_fetch_inferior_registers;
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t->to_store_registers = ppc_linux_store_inferior_registers;
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/* Add our watchpoint methods. */
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t->to_can_use_hw_breakpoint = ppc_linux_check_watch_resources;
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t->to_region_ok_for_hw_watchpoint = ppc_linux_region_ok_for_hw_watchpoint;
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t->to_insert_watchpoint = ppc_linux_insert_watchpoint;
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t->to_remove_watchpoint = ppc_linux_remove_watchpoint;
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t->to_stopped_by_watchpoint = ppc_linux_stopped_by_watchpoint;
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t->to_stopped_data_address = ppc_linux_stopped_data_address;
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/* Register the target. */
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add_target (t);
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}
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@ -3387,6 +3387,8 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
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_("rs6000_gdbarch_init: "
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"received unexpected BFD 'arch' value"));
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set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
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/* Sanity check on registers. */
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gdb_assert (strcmp (tdep->regs[tdep->ppc_gp0_regnum].name, "r0") == 0);
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29
gdb/target.c
29
gdb/target.c
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@ -48,6 +48,8 @@ static void kill_or_be_killed (int);
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static void default_terminal_info (char *, int);
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static int default_region_ok_for_hw_watchpoint (CORE_ADDR, int);
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static int default_region_size_ok_for_hw_watchpoint (int);
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static int nosymbol (char *, CORE_ADDR *);
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@ -129,6 +131,8 @@ static int debug_to_stopped_by_watchpoint (void);
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static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
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static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR, int);
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static int debug_to_region_size_ok_for_hw_watchpoint (int);
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static void debug_to_terminal_init (void);
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@ -406,6 +410,7 @@ update_current_target (void)
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INHERIT (to_stopped_data_address, t);
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INHERIT (to_stopped_by_watchpoint, t);
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INHERIT (to_have_continuable_watchpoint, t);
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INHERIT (to_region_ok_for_hw_watchpoint, t);
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INHERIT (to_region_size_ok_for_hw_watchpoint, t);
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INHERIT (to_terminal_init, t);
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INHERIT (to_terminal_inferior, t);
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@ -532,6 +537,8 @@ update_current_target (void)
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de_fault (to_stopped_data_address,
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(int (*) (struct target_ops *, CORE_ADDR *))
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return_zero);
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de_fault (to_region_ok_for_hw_watchpoint,
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default_region_ok_for_hw_watchpoint);
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de_fault (to_region_size_ok_for_hw_watchpoint,
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default_region_size_ok_for_hw_watchpoint);
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de_fault (to_terminal_init,
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@ -1578,6 +1585,12 @@ find_default_create_inferior (char *exec_file, char *allargs, char **env,
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return;
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}
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static int
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default_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
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{
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return TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT (len);
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}
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static int
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default_region_size_ok_for_hw_watchpoint (int byte_count)
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{
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@ -2118,6 +2131,21 @@ debug_to_can_use_hw_breakpoint (int type, int cnt, int from_tty)
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return retval;
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}
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static int
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debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
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{
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CORE_ADDR retval;
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retval = debug_target.to_region_ok_for_hw_watchpoint (addr, len);
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fprintf_unfiltered (gdb_stdlog,
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"TARGET_REGION_OK_FOR_HW_WATCHPOINT (%ld, %ld) = 0x%lx\n",
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(unsigned long) addr,
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(unsigned long) len,
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(unsigned long) retval);
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return retval;
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}
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static int
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debug_to_region_size_ok_for_hw_watchpoint (int byte_count)
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{
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@ -2537,6 +2565,7 @@ setup_target_debug (void)
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current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
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current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
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current_target.to_stopped_data_address = debug_to_stopped_data_address;
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current_target.to_region_ok_for_hw_watchpoint = debug_to_region_ok_for_hw_watchpoint;
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current_target.to_region_size_ok_for_hw_watchpoint = debug_to_region_size_ok_for_hw_watchpoint;
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current_target.to_terminal_init = debug_to_terminal_init;
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current_target.to_terminal_inferior = debug_to_terminal_inferior;
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@ -346,6 +346,7 @@ struct target_ops
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int (*to_stopped_by_watchpoint) (void);
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int to_have_continuable_watchpoint;
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int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *);
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int (*to_region_ok_for_hw_watchpoint) (CORE_ADDR, int);
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int (*to_region_size_ok_for_hw_watchpoint) (int);
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void (*to_terminal_init) (void);
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void (*to_terminal_inferior) (void);
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@ -1031,6 +1032,11 @@ extern void (*deprecated_target_new_objfile_hook) (struct objfile *);
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(*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE);
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#endif
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#ifndef TARGET_REGION_OK_FOR_HW_WATCHPOINT
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#define TARGET_REGION_OK_FOR_HW_WATCHPOINT(addr, len) \
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(*current_target.to_region_ok_for_hw_watchpoint) (addr, len)
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#endif
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#if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
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#define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(byte_count) \
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(*current_target.to_region_size_ok_for_hw_watchpoint) (byte_count)
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