/* GNU/Linux on ARM native support.
- Copyright (C) 1999-2014 Free Software Foundation, Inc.
+ Copyright (C) 1999-2024 Free Software Foundation, Inc.
This file is part of GDB.
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 "defs.h"
#include "inferior.h"
#include "gdbcore.h"
-#include <string.h>
#include "regcache.h"
#include "target.h"
#include "linux-nat.h"
#include "target-descriptions.h"
#include "auxv.h"
-#include "observer.h"
+#include "observable.h"
#include "gdbthread.h"
+#include "aarch32-tdep.h"
#include "arm-tdep.h"
#include "arm-linux-tdep.h"
+#include "aarch32-linux-nat.h"
#include <elf/common.h>
#include <sys/user.h>
-#include <sys/ptrace.h>
+#include "nat/gdb_ptrace.h"
#include <sys/utsname.h>
#include <sys/procfs.h>
+#include "nat/linux-ptrace.h"
+#include "linux-tdep.h"
+
/* Prototypes for supply_gregset etc. */
#include "gregset.h"
#define PTRACE_SETHBPREGS 30
#endif
-/* A flag for whether the WMMX registers are available. */
-static int arm_linux_has_wmmx_registers;
+class arm_linux_nat_target final : public linux_nat_target
+{
+public:
+ /* Add our register access methods. */
+ void fetch_registers (struct regcache *, int) override;
+ void store_registers (struct regcache *, int) override;
-/* The number of 64-bit VFP registers we have (expect this to be 0,
- 16, or 32). */
-static int arm_linux_vfp_register_count;
+ /* Add our hardware breakpoint and watchpoint implementation. */
+ int can_use_hw_breakpoint (enum bptype, int, int) override;
-extern int arm_apcs_32;
+ int insert_hw_breakpoint (struct gdbarch *, struct bp_target_info *) override;
-/* On GNU/Linux, threads are implemented as pseudo-processes, in which
- case we may be tracing more than one process at a time. In that
- case, inferior_ptid will contain the main process ID and the
- individual thread (process) ID. get_thread_id () is used to get
- the thread id if it's available, and the process id otherwise. */
+ int remove_hw_breakpoint (struct gdbarch *, struct bp_target_info *) override;
-static int
-get_thread_id (ptid_t ptid)
-{
- int tid = ptid_get_lwp (ptid);
- if (0 == tid)
- tid = ptid_get_pid (ptid);
- return tid;
-}
+ int region_ok_for_hw_watchpoint (CORE_ADDR, int) override;
-#define GET_THREAD_ID(PTID) get_thread_id (PTID)
+ int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
+ struct expression *) override;
-/* Get the value of a particular register from the floating point
- state of the process and store it into regcache. */
+ int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
+ struct expression *) override;
+ bool stopped_by_watchpoint () override;
-static void
-fetch_fpregister (struct regcache *regcache, int regno)
-{
- int ret, tid;
- gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
-
- /* Get the thread id for the ptrace call. */
- tid = GET_THREAD_ID (inferior_ptid);
+ bool stopped_data_address (CORE_ADDR *) override;
- /* Read the floating point state. */
- ret = ptrace (PT_GETFPREGS, tid, 0, fp);
- if (ret < 0)
- {
- warning (_("Unable to fetch floating point register."));
- return;
- }
+ bool watchpoint_addr_within_range (CORE_ADDR, CORE_ADDR, int) override;
- /* Fetch fpsr. */
- if (ARM_FPS_REGNUM == regno)
- regcache_raw_supply (regcache, ARM_FPS_REGNUM,
- fp + NWFPE_FPSR_OFFSET);
+ const struct target_desc *read_description () override;
- /* Fetch the floating point register. */
- if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
- supply_nwfpe_register (regcache, regno, fp);
-}
+ /* Override linux_nat_target low methods. */
+
+ /* Handle thread creation and exit. */
+ void low_new_thread (struct lwp_info *lp) override;
+ void low_delete_thread (struct arch_lwp_info *lp) override;
+ void low_prepare_to_resume (struct lwp_info *lp) override;
+
+ /* Handle process creation and exit. */
+ void low_new_fork (struct lwp_info *parent, pid_t child_pid) override;
+ void low_forget_process (pid_t pid) override;
+};
+
+static arm_linux_nat_target the_arm_linux_nat_target;
/* Get the whole floating point state of the process and store it
into regcache. */
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
/* Get the thread id for the ptrace call. */
- tid = GET_THREAD_ID (inferior_ptid);
-
+ tid = regcache->ptid ().lwp ();
+
/* Read the floating point state. */
- ret = ptrace (PT_GETFPREGS, tid, 0, fp);
- if (ret < 0)
+ if (have_ptrace_getregset == TRIBOOL_TRUE)
{
- warning (_("Unable to fetch the floating point registers."));
- return;
+ struct iovec iov;
+
+ iov.iov_base = &fp;
+ iov.iov_len = ARM_LINUX_SIZEOF_NWFPE;
+
+ ret = ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET, &iov);
}
+ else
+ ret = ptrace (PT_GETFPREGS, tid, 0, fp);
+
+ if (ret < 0)
+ perror_with_name (_("Unable to fetch the floating point registers"));
/* Fetch fpsr. */
- regcache_raw_supply (regcache, ARM_FPS_REGNUM,
- fp + NWFPE_FPSR_OFFSET);
+ regcache->raw_supply (ARM_FPS_REGNUM, fp + NWFPE_FPSR_OFFSET);
/* Fetch the floating point registers. */
for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
supply_nwfpe_register (regcache, regno, fp);
}
-/* Save a particular register into the floating point state of the
- process using the contents from regcache. */
-
-static void
-store_fpregister (const struct regcache *regcache, int regno)
-{
- int ret, tid;
- gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
-
- /* Get the thread id for the ptrace call. */
- tid = GET_THREAD_ID (inferior_ptid);
-
- /* Read the floating point state. */
- ret = ptrace (PT_GETFPREGS, tid, 0, fp);
- if (ret < 0)
- {
- warning (_("Unable to fetch the floating point registers."));
- return;
- }
-
- /* Store fpsr. */
- if (ARM_FPS_REGNUM == regno
- && REG_VALID == regcache_register_status (regcache, ARM_FPS_REGNUM))
- regcache_raw_collect (regcache, ARM_FPS_REGNUM, fp + NWFPE_FPSR_OFFSET);
-
- /* Store the floating point register. */
- if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
- collect_nwfpe_register (regcache, regno, fp);
-
- ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
- if (ret < 0)
- {
- warning (_("Unable to store floating point register."));
- return;
- }
-}
-
/* Save the whole floating point state of the process using
the contents from regcache. */
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
/* Get the thread id for the ptrace call. */
- tid = GET_THREAD_ID (inferior_ptid);
-
+ tid = regcache->ptid ().lwp ();
+
/* Read the floating point state. */
- ret = ptrace (PT_GETFPREGS, tid, 0, fp);
- if (ret < 0)
+ if (have_ptrace_getregset == TRIBOOL_TRUE)
{
- warning (_("Unable to fetch the floating point registers."));
- return;
+ elf_fpregset_t fpregs;
+ struct iovec iov;
+
+ iov.iov_base = &fpregs;
+ iov.iov_len = sizeof (fpregs);
+
+ ret = ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET, &iov);
}
+ else
+ ret = ptrace (PT_GETFPREGS, tid, 0, fp);
+
+ if (ret < 0)
+ perror_with_name (_("Unable to fetch the floating point registers"));
/* Store fpsr. */
- if (REG_VALID == regcache_register_status (regcache, ARM_FPS_REGNUM))
- regcache_raw_collect (regcache, ARM_FPS_REGNUM, fp + NWFPE_FPSR_OFFSET);
+ if (REG_VALID == regcache->get_register_status (ARM_FPS_REGNUM))
+ regcache->raw_collect (ARM_FPS_REGNUM, fp + NWFPE_FPSR_OFFSET);
/* Store the floating point registers. */
for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
- if (REG_VALID == regcache_register_status (regcache, regno))
+ if (REG_VALID == regcache->get_register_status (regno))
collect_nwfpe_register (regcache, regno, fp);
- ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
- if (ret < 0)
+ if (have_ptrace_getregset == TRIBOOL_TRUE)
{
- warning (_("Unable to store floating point registers."));
- return;
- }
-}
+ struct iovec iov;
-/* Fetch a general register of the process and store into
- regcache. */
+ iov.iov_base = &fp;
+ iov.iov_len = ARM_LINUX_SIZEOF_NWFPE;
-static void
-fetch_register (struct regcache *regcache, int regno)
-{
- int ret, tid;
- elf_gregset_t regs;
-
- /* Get the thread id for the ptrace call. */
- tid = GET_THREAD_ID (inferior_ptid);
-
- ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
- if (ret < 0)
- {
- warning (_("Unable to fetch general register."));
- return;
+ ret = ptrace (PTRACE_SETREGSET, tid, NT_FPREGSET, &iov);
}
+ else
+ ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
- if (regno >= ARM_A1_REGNUM && regno < ARM_PC_REGNUM)
- regcache_raw_supply (regcache, regno, (char *) ®s[regno]);
-
- if (ARM_PS_REGNUM == regno)
- {
- if (arm_apcs_32)
- regcache_raw_supply (regcache, ARM_PS_REGNUM,
- (char *) ®s[ARM_CPSR_GREGNUM]);
- else
- regcache_raw_supply (regcache, ARM_PS_REGNUM,
- (char *) ®s[ARM_PC_REGNUM]);
- }
-
- if (ARM_PC_REGNUM == regno)
- {
- regs[ARM_PC_REGNUM] = gdbarch_addr_bits_remove
- (get_regcache_arch (regcache),
- regs[ARM_PC_REGNUM]);
- regcache_raw_supply (regcache, ARM_PC_REGNUM,
- (char *) ®s[ARM_PC_REGNUM]);
- }
+ if (ret < 0)
+ perror_with_name (_("Unable to store floating point registers"));
}
/* Fetch all general registers of the process and store into
static void
fetch_regs (struct regcache *regcache)
{
- int ret, regno, tid;
+ int ret, tid;
elf_gregset_t regs;
/* Get the thread id for the ptrace call. */
- tid = GET_THREAD_ID (inferior_ptid);
-
- ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
- if (ret < 0)
+ tid = regcache->ptid ().lwp ();
+
+ if (have_ptrace_getregset == TRIBOOL_TRUE)
{
- warning (_("Unable to fetch general registers."));
- return;
- }
+ struct iovec iov;
- for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
- regcache_raw_supply (regcache, regno, (char *) ®s[regno]);
+ iov.iov_base = ®s;
+ iov.iov_len = sizeof (regs);
- if (arm_apcs_32)
- regcache_raw_supply (regcache, ARM_PS_REGNUM,
- (char *) ®s[ARM_CPSR_GREGNUM]);
+ ret = ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iov);
+ }
else
- regcache_raw_supply (regcache, ARM_PS_REGNUM,
- (char *) ®s[ARM_PC_REGNUM]);
+ ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
- regs[ARM_PC_REGNUM] = gdbarch_addr_bits_remove
- (get_regcache_arch (regcache), regs[ARM_PC_REGNUM]);
- regcache_raw_supply (regcache, ARM_PC_REGNUM,
- (char *) ®s[ARM_PC_REGNUM]);
-}
+ if (ret < 0)
+ perror_with_name (_("Unable to fetch general registers"));
-/* Store all general registers of the process from the values in
- regcache. */
+ aarch32_gp_regcache_supply (regcache, (uint32_t *) regs, arm_apcs_32);
+}
static void
-store_register (const struct regcache *regcache, int regno)
+store_regs (const struct regcache *regcache)
{
int ret, tid;
elf_gregset_t regs;
-
- if (REG_VALID != regcache_register_status (regcache, regno))
- return;
/* Get the thread id for the ptrace call. */
- tid = GET_THREAD_ID (inferior_ptid);
-
- /* Get the general registers from the process. */
- ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
- if (ret < 0)
+ tid = regcache->ptid ().lwp ();
+
+ /* Fetch the general registers. */
+ if (have_ptrace_getregset == TRIBOOL_TRUE)
{
- warning (_("Unable to fetch general registers."));
- return;
- }
+ struct iovec iov;
- if (regno >= ARM_A1_REGNUM && regno <= ARM_PC_REGNUM)
- regcache_raw_collect (regcache, regno, (char *) ®s[regno]);
- else if (arm_apcs_32 && regno == ARM_PS_REGNUM)
- regcache_raw_collect (regcache, regno,
- (char *) ®s[ARM_CPSR_GREGNUM]);
- else if (!arm_apcs_32 && regno == ARM_PS_REGNUM)
- regcache_raw_collect (regcache, ARM_PC_REGNUM,
- (char *) ®s[ARM_PC_REGNUM]);
+ iov.iov_base = ®s;
+ iov.iov_len = sizeof (regs);
- ret = ptrace (PTRACE_SETREGS, tid, 0, ®s);
- if (ret < 0)
- {
- warning (_("Unable to store general register."));
- return;
+ ret = ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iov);
}
-}
-
-static void
-store_regs (const struct regcache *regcache)
-{
- int ret, regno, tid;
- elf_gregset_t regs;
+ else
+ ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
- /* Get the thread id for the ptrace call. */
- tid = GET_THREAD_ID (inferior_ptid);
-
- /* Fetch the general registers. */
- ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
if (ret < 0)
- {
- warning (_("Unable to fetch general registers."));
- return;
- }
+ perror_with_name (_("Unable to fetch general registers"));
+
+ aarch32_gp_regcache_collect (regcache, (uint32_t *) regs, arm_apcs_32);
- for (regno = ARM_A1_REGNUM; regno <= ARM_PC_REGNUM; regno++)
+ if (have_ptrace_getregset == TRIBOOL_TRUE)
{
- if (REG_VALID == regcache_register_status (regcache, regno))
- regcache_raw_collect (regcache, regno, (char *) ®s[regno]);
- }
+ struct iovec iov;
- if (arm_apcs_32 && REG_VALID == regcache_register_status (regcache, ARM_PS_REGNUM))
- regcache_raw_collect (regcache, ARM_PS_REGNUM,
- (char *) ®s[ARM_CPSR_GREGNUM]);
+ iov.iov_base = ®s;
+ iov.iov_len = sizeof (regs);
- ret = ptrace (PTRACE_SETREGS, tid, 0, ®s);
+ ret = ptrace (PTRACE_SETREGSET, tid, NT_PRSTATUS, &iov);
+ }
+ else
+ ret = ptrace (PTRACE_SETREGS, tid, 0, ®s);
if (ret < 0)
- {
- warning (_("Unable to store general registers."));
- return;
- }
+ perror_with_name (_("Unable to store general registers"));
}
/* Fetch all WMMX registers of the process and store into
regcache. */
-#define IWMMXT_REGS_SIZE (16 * 8 + 6 * 4)
-
static void
fetch_wmmx_regs (struct regcache *regcache)
{
int ret, regno, tid;
/* Get the thread id for the ptrace call. */
- tid = GET_THREAD_ID (inferior_ptid);
+ tid = regcache->ptid ().lwp ();
ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
if (ret < 0)
- {
- warning (_("Unable to fetch WMMX registers."));
- return;
- }
+ perror_with_name (_("Unable to fetch WMMX registers"));
for (regno = 0; regno < 16; regno++)
- regcache_raw_supply (regcache, regno + ARM_WR0_REGNUM,
- ®buf[regno * 8]);
+ regcache->raw_supply (regno + ARM_WR0_REGNUM, ®buf[regno * 8]);
for (regno = 0; regno < 2; regno++)
- regcache_raw_supply (regcache, regno + ARM_WCSSF_REGNUM,
- ®buf[16 * 8 + regno * 4]);
+ regcache->raw_supply (regno + ARM_WCSSF_REGNUM,
+ ®buf[16 * 8 + regno * 4]);
for (regno = 0; regno < 4; regno++)
- regcache_raw_supply (regcache, regno + ARM_WCGR0_REGNUM,
- ®buf[16 * 8 + 2 * 4 + regno * 4]);
+ regcache->raw_supply (regno + ARM_WCGR0_REGNUM,
+ ®buf[16 * 8 + 2 * 4 + regno * 4]);
}
static void
int ret, regno, tid;
/* Get the thread id for the ptrace call. */
- tid = GET_THREAD_ID (inferior_ptid);
+ tid = regcache->ptid ().lwp ();
ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
if (ret < 0)
- {
- warning (_("Unable to fetch WMMX registers."));
- return;
- }
+ perror_with_name (_("Unable to fetch WMMX registers"));
for (regno = 0; regno < 16; regno++)
- if (REG_VALID == regcache_register_status (regcache,
- regno + ARM_WR0_REGNUM))
- regcache_raw_collect (regcache, regno + ARM_WR0_REGNUM,
- ®buf[regno * 8]);
+ if (REG_VALID == regcache->get_register_status (regno + ARM_WR0_REGNUM))
+ regcache->raw_collect (regno + ARM_WR0_REGNUM, ®buf[regno * 8]);
for (regno = 0; regno < 2; regno++)
- if (REG_VALID == regcache_register_status (regcache,
- regno + ARM_WCSSF_REGNUM))
- regcache_raw_collect (regcache, regno + ARM_WCSSF_REGNUM,
- ®buf[16 * 8 + regno * 4]);
+ if (REG_VALID == regcache->get_register_status (regno + ARM_WCSSF_REGNUM))
+ regcache->raw_collect (regno + ARM_WCSSF_REGNUM,
+ ®buf[16 * 8 + regno * 4]);
for (regno = 0; regno < 4; regno++)
- if (REG_VALID == regcache_register_status (regcache,
- regno + ARM_WCGR0_REGNUM))
- regcache_raw_collect (regcache, regno + ARM_WCGR0_REGNUM,
- ®buf[16 * 8 + 2 * 4 + regno * 4]);
+ if (REG_VALID == regcache->get_register_status (regno + ARM_WCGR0_REGNUM))
+ regcache->raw_collect (regno + ARM_WCGR0_REGNUM,
+ ®buf[16 * 8 + 2 * 4 + regno * 4]);
ret = ptrace (PTRACE_SETWMMXREGS, tid, 0, regbuf);
if (ret < 0)
- {
- warning (_("Unable to store WMMX registers."));
- return;
- }
+ perror_with_name (_("Unable to store WMMX registers"));
}
-/* Fetch and store VFP Registers. The kernel object has space for 32
- 64-bit registers, and the FPSCR. This is even when on a VFPv2 or
- VFPv3D16 target. */
-#define VFP_REGS_SIZE (32 * 8 + 4)
-
static void
fetch_vfp_regs (struct regcache *regcache)
{
- char regbuf[VFP_REGS_SIZE];
- int ret, regno, tid;
+ gdb_byte regbuf[ARM_VFP3_REGS_SIZE];
+ int ret, tid;
+ struct gdbarch *gdbarch = regcache->arch ();
+ arm_gdbarch_tdep *tdep = gdbarch_tdep<arm_gdbarch_tdep> (gdbarch);
/* Get the thread id for the ptrace call. */
- tid = GET_THREAD_ID (inferior_ptid);
+ tid = regcache->ptid ().lwp ();
- ret = ptrace (PTRACE_GETVFPREGS, tid, 0, regbuf);
- if (ret < 0)
+ if (have_ptrace_getregset == TRIBOOL_TRUE)
{
- warning (_("Unable to fetch VFP registers."));
- return;
+ struct iovec iov;
+
+ iov.iov_base = regbuf;
+ iov.iov_len = ARM_VFP3_REGS_SIZE;
+ ret = ptrace (PTRACE_GETREGSET, tid, NT_ARM_VFP, &iov);
}
+ else
+ ret = ptrace (PTRACE_GETVFPREGS, tid, 0, regbuf);
- for (regno = 0; regno < arm_linux_vfp_register_count; regno++)
- regcache_raw_supply (regcache, regno + ARM_D0_REGNUM,
- (char *) regbuf + regno * 8);
+ if (ret < 0)
+ perror_with_name (_("Unable to fetch VFP registers"));
- regcache_raw_supply (regcache, ARM_FPSCR_REGNUM,
- (char *) regbuf + 32 * 8);
+ aarch32_vfp_regcache_supply (regcache, regbuf,
+ tdep->vfp_register_count);
}
static void
store_vfp_regs (const struct regcache *regcache)
{
- char regbuf[VFP_REGS_SIZE];
- int ret, regno, tid;
+ gdb_byte regbuf[ARM_VFP3_REGS_SIZE];
+ int ret, tid;
+ struct gdbarch *gdbarch = regcache->arch ();
+ arm_gdbarch_tdep *tdep = gdbarch_tdep<arm_gdbarch_tdep> (gdbarch);
/* Get the thread id for the ptrace call. */
- tid = GET_THREAD_ID (inferior_ptid);
+ tid = regcache->ptid ().lwp ();
- ret = ptrace (PTRACE_GETVFPREGS, tid, 0, regbuf);
- if (ret < 0)
+ if (have_ptrace_getregset == TRIBOOL_TRUE)
{
- warning (_("Unable to fetch VFP registers (for update)."));
- return;
- }
+ struct iovec iov;
- for (regno = 0; regno < arm_linux_vfp_register_count; regno++)
- regcache_raw_collect (regcache, regno + ARM_D0_REGNUM,
- (char *) regbuf + regno * 8);
+ iov.iov_base = regbuf;
+ iov.iov_len = ARM_VFP3_REGS_SIZE;
+ ret = ptrace (PTRACE_GETREGSET, tid, NT_ARM_VFP, &iov);
+ }
+ else
+ ret = ptrace (PTRACE_GETVFPREGS, tid, 0, regbuf);
- regcache_raw_collect (regcache, ARM_FPSCR_REGNUM,
- (char *) regbuf + 32 * 8);
+ if (ret < 0)
+ perror_with_name (_("Unable to fetch VFP registers (for update)"));
- ret = ptrace (PTRACE_SETVFPREGS, tid, 0, regbuf);
+ aarch32_vfp_regcache_collect (regcache, regbuf,
+ tdep->vfp_register_count);
- if (ret < 0)
+ if (have_ptrace_getregset == TRIBOOL_TRUE)
{
- warning (_("Unable to store VFP registers."));
- return;
+ struct iovec iov;
+
+ iov.iov_base = regbuf;
+ iov.iov_len = ARM_VFP3_REGS_SIZE;
+ ret = ptrace (PTRACE_SETREGSET, tid, NT_ARM_VFP, &iov);
}
+ else
+ ret = ptrace (PTRACE_SETVFPREGS, tid, 0, regbuf);
+
+ if (ret < 0)
+ perror_with_name (_("Unable to store VFP registers"));
}
/* Fetch registers from the child process. Fetch all registers if
regno == -1, otherwise fetch all general registers or all floating
point registers depending upon the value of regno. */
-static void
-arm_linux_fetch_inferior_registers (struct target_ops *ops,
- struct regcache *regcache, int regno)
+void
+arm_linux_nat_target::fetch_registers (struct regcache *regcache, int regno)
{
+ struct gdbarch *gdbarch = regcache->arch ();
+ arm_gdbarch_tdep *tdep = gdbarch_tdep<arm_gdbarch_tdep> (gdbarch);
+
if (-1 == regno)
{
fetch_regs (regcache);
- fetch_fpregs (regcache);
- if (arm_linux_has_wmmx_registers)
+ if (tdep->have_wmmx_registers)
fetch_wmmx_regs (regcache);
- if (arm_linux_vfp_register_count > 0)
+ if (tdep->vfp_register_count > 0)
fetch_vfp_regs (regcache);
+ if (tdep->have_fpa_registers)
+ fetch_fpregs (regcache);
}
- else
+ else
{
if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
- fetch_register (regcache, regno);
+ fetch_regs (regcache);
else if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM)
- fetch_fpregister (regcache, regno);
- else if (arm_linux_has_wmmx_registers
+ fetch_fpregs (regcache);
+ else if (tdep->have_wmmx_registers
&& regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
fetch_wmmx_regs (regcache);
- else if (arm_linux_vfp_register_count > 0
+ else if (tdep->vfp_register_count > 0
&& regno >= ARM_D0_REGNUM
- && regno <= ARM_D0_REGNUM + arm_linux_vfp_register_count)
+ && (regno < ARM_D0_REGNUM + tdep->vfp_register_count
+ || regno == ARM_FPSCR_REGNUM))
fetch_vfp_regs (regcache);
}
}
regno == -1, otherwise store all general registers or all floating
point registers depending upon the value of regno. */
-static void
-arm_linux_store_inferior_registers (struct target_ops *ops,
- struct regcache *regcache, int regno)
+void
+arm_linux_nat_target::store_registers (struct regcache *regcache, int regno)
{
+ struct gdbarch *gdbarch = regcache->arch ();
+ arm_gdbarch_tdep *tdep = gdbarch_tdep<arm_gdbarch_tdep> (gdbarch);
+
if (-1 == regno)
{
store_regs (regcache);
- store_fpregs (regcache);
- if (arm_linux_has_wmmx_registers)
+ if (tdep->have_wmmx_registers)
store_wmmx_regs (regcache);
- if (arm_linux_vfp_register_count > 0)
+ if (tdep->vfp_register_count > 0)
store_vfp_regs (regcache);
+ if (tdep->have_fpa_registers)
+ store_fpregs (regcache);
}
else
{
if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
- store_register (regcache, regno);
+ store_regs (regcache);
else if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM))
- store_fpregister (regcache, regno);
- else if (arm_linux_has_wmmx_registers
+ store_fpregs (regcache);
+ else if (tdep->have_wmmx_registers
&& regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
store_wmmx_regs (regcache);
- else if (arm_linux_vfp_register_count > 0
+ else if (tdep->vfp_register_count > 0
&& regno >= ARM_D0_REGNUM
- && regno <= ARM_D0_REGNUM + arm_linux_vfp_register_count)
+ && (regno < ARM_D0_REGNUM + tdep->vfp_register_count
+ || regno == ARM_FPSCR_REGNUM))
store_vfp_regs (regcache);
}
}
/* Fetch the thread-local storage pointer for libthread_db. */
ps_err_e
-ps_get_thread_area (const struct ps_prochandle *ph,
- lwpid_t lwpid, int idx, void **base)
+ps_get_thread_area (struct ps_prochandle *ph,
+ lwpid_t lwpid, int idx, void **base)
{
if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
return PS_ERR;
return PS_OK;
}
-static const struct target_desc *
-arm_linux_read_description (struct target_ops *ops)
+const struct target_desc *
+arm_linux_nat_target::read_description ()
{
- CORE_ADDR arm_hwcap = 0;
- arm_linux_has_wmmx_registers = 0;
- arm_linux_vfp_register_count = 0;
+ if (inferior_ptid == null_ptid)
+ return this->beneath ()->read_description ();
+
+ CORE_ADDR arm_hwcap = linux_get_hwcap ();
- if (target_auxv_search (ops, AT_HWCAP, &arm_hwcap) != 1)
+ if (have_ptrace_getregset == TRIBOOL_UNKNOWN)
{
- return NULL;
+ elf_gregset_t gpregs;
+ struct iovec iov;
+ int tid = inferior_ptid.pid ();
+
+ iov.iov_base = &gpregs;
+ iov.iov_len = sizeof (gpregs);
+
+ /* Check if PTRACE_GETREGSET works. */
+ if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iov) < 0)
+ have_ptrace_getregset = TRIBOOL_FALSE;
+ else
+ have_ptrace_getregset = TRIBOOL_TRUE;
}
if (arm_hwcap & HWCAP_IWMMXT)
- {
- arm_linux_has_wmmx_registers = 1;
- return tdesc_arm_with_iwmmxt;
- }
+ return arm_read_description (ARM_FP_TYPE_IWMMXT, false);
if (arm_hwcap & HWCAP_VFP)
{
- int pid;
- char *buf;
- const struct target_desc * result = NULL;
+ /* Make sure that the kernel supports reading VFP registers. Support was
+ added in 2.6.30. */
+ int pid = inferior_ptid.pid ();
+ errno = 0;
+ char *buf = (char *) alloca (ARM_VFP3_REGS_SIZE);
+ if (ptrace (PTRACE_GETVFPREGS, pid, 0, buf) < 0 && errno == EIO)
+ return nullptr;
/* NEON implies VFPv3-D32 or no-VFP unit. Say that we only support
Neon with VFPv3-D32. */
if (arm_hwcap & HWCAP_NEON)
- {
- arm_linux_vfp_register_count = 32;
- result = tdesc_arm_with_neon;
- }
+ return aarch32_read_description (false);
else if ((arm_hwcap & (HWCAP_VFPv3 | HWCAP_VFPv3D16)) == HWCAP_VFPv3)
- {
- arm_linux_vfp_register_count = 32;
- result = tdesc_arm_with_vfpv3;
- }
- else
- {
- arm_linux_vfp_register_count = 16;
- result = tdesc_arm_with_vfpv2;
- }
+ return arm_read_description (ARM_FP_TYPE_VFPV3, false);
- /* Now make sure that the kernel supports reading these
- registers. Support was added in 2.6.30. */
- pid = ptid_get_lwp (inferior_ptid);
- errno = 0;
- buf = alloca (VFP_REGS_SIZE);
- if (ptrace (PTRACE_GETVFPREGS, pid, 0, buf) < 0
- && errno == EIO)
- result = NULL;
-
- return result;
+ return arm_read_description (ARM_FP_TYPE_VFPV2, false);
}
- return NULL;
+ return this->beneath ()->read_description ();
}
/* Information describing the hardware breakpoint capabilities. */
gdb_byte bp_count;
};
+/* Since we cannot dynamically allocate subfields of arm_linux_process_info,
+ assume a maximum number of supported break-/watchpoints. */
+#define MAX_BPTS 16
+#define MAX_WPTS 16
+
/* Get hold of the Hardware Breakpoint information for the target we are
attached to. Returns NULL if the kernel doesn't support Hardware
breakpoints at all, or a pointer to the information structure. */
int tid;
unsigned int val;
- tid = GET_THREAD_ID (inferior_ptid);
+ tid = inferior_ptid.lwp ();
if (ptrace (PTRACE_GETHBPREGS, tid, 0, &val) < 0)
available = 0;
else
info.max_wp_length = (gdb_byte)((val >> 16) & 0xff);
info.wp_count = (gdb_byte)((val >> 8) & 0xff);
info.bp_count = (gdb_byte)(val & 0xff);
+
+ if (info.wp_count > MAX_WPTS)
+ {
+ warning (_("arm-linux-gdb supports %d hardware watchpoints but target \
+ supports %d"), MAX_WPTS, info.wp_count);
+ info.wp_count = MAX_WPTS;
+ }
+
+ if (info.bp_count > MAX_BPTS)
+ {
+ warning (_("arm-linux-gdb supports %d hardware breakpoints but target \
+ supports %d"), MAX_BPTS, info.bp_count);
+ info.bp_count = MAX_BPTS;
+ }
available = (info.arch != 0);
}
}
/* Have we got a free break-/watch-point available for use? Returns -1 if
there is not an appropriate resource available, otherwise returns 1. */
-static int
-arm_linux_can_use_hw_breakpoint (struct target_ops *self,
- int type, int cnt, int ot)
+int
+arm_linux_nat_target::can_use_hw_breakpoint (enum bptype type,
+ int cnt, int ot)
{
if (type == bp_hardware_watchpoint || type == bp_read_watchpoint
|| type == bp_access_watchpoint || type == bp_watchpoint)
{
- if (cnt + ot > arm_linux_get_hw_watchpoint_count ())
+ int count = arm_linux_get_hw_watchpoint_count ();
+
+ if (count == 0)
+ return 0;
+ else if (cnt + ot > count)
return -1;
}
else if (type == bp_hardware_breakpoint)
{
- if (cnt > arm_linux_get_hw_breakpoint_count ())
+ int count = arm_linux_get_hw_breakpoint_count ();
+
+ if (count == 0)
+ return 0;
+ else if (cnt > count)
return -1;
}
else
- gdb_assert (FALSE);
+ gdb_assert_not_reached ("unknown breakpoint type");
return 1;
}
arm_hwbp_control_t control;
};
-/* Structure containing arrays of the break and watch points which are have
- active in each thread.
+/* Structure containing arrays of per process hardware break-/watchpoints
+ for caching address and control information.
The Linux ptrace interface to hardware break-/watch-points presents the
values in a vector centred around 0 (which is used fo generic information).
The Linux vector is indexed as follows:
-((i << 1) + 2): Control register for watchpoint i.
-((i << 1) + 1): Address register for watchpoint i.
- 0: Information register.
+ 0: Information register.
((i << 1) + 1): Address register for breakpoint i.
((i << 1) + 2): Control register for breakpoint i.
We treat break-/watch-points with their enable bit clear as being deleted.
*/
-typedef struct arm_linux_thread_points
+struct arm_linux_debug_reg_state
{
- /* Thread ID. */
- int tid;
- /* Breakpoints for thread. */
- struct arm_linux_hw_breakpoint *bpts;
- /* Watchpoint for threads. */
- struct arm_linux_hw_breakpoint *wpts;
-} *arm_linux_thread_points_p;
-DEF_VEC_P (arm_linux_thread_points_p);
-
-/* Vector of hardware breakpoints for each thread. */
-VEC(arm_linux_thread_points_p) *arm_threads = NULL;
-
-/* Find the list of hardware break-/watch-points for a thread with id TID.
- If no list exists for TID we return NULL if ALLOC_NEW is 0, otherwise we
- create a new list and return that. */
-static struct arm_linux_thread_points *
-arm_linux_find_breakpoints_by_tid (int tid, int alloc_new)
+ /* Hardware breakpoints for this process. */
+ struct arm_linux_hw_breakpoint bpts[MAX_BPTS];
+ /* Hardware watchpoints for this process. */
+ struct arm_linux_hw_breakpoint wpts[MAX_WPTS];
+};
+
+/* Per-process arch-specific data we want to keep. */
+struct arm_linux_process_info
{
- int i;
- struct arm_linux_thread_points *t;
+ /* Linked list. */
+ struct arm_linux_process_info *next;
+ /* The process identifier. */
+ pid_t pid;
+ /* Hardware break-/watchpoints state information. */
+ struct arm_linux_debug_reg_state state;
- for (i = 0; VEC_iterate (arm_linux_thread_points_p, arm_threads, i, t); ++i)
- {
- if (t->tid == tid)
- return t;
- }
+};
+
+/* Per-thread arch-specific data we want to keep. */
+struct arch_lwp_info
+{
+ /* Non-zero if our copy differs from what's recorded in the thread. */
+ char bpts_changed[MAX_BPTS];
+ char wpts_changed[MAX_WPTS];
+};
+
+static struct arm_linux_process_info *arm_linux_process_list = NULL;
+
+/* Find process data for process PID. */
+
+static struct arm_linux_process_info *
+arm_linux_find_process_pid (pid_t pid)
+{
+ struct arm_linux_process_info *proc;
+
+ for (proc = arm_linux_process_list; proc; proc = proc->next)
+ if (proc->pid == pid)
+ return proc;
+
+ return NULL;
+}
+
+/* Add process data for process PID. Returns newly allocated info
+ object. */
+
+static struct arm_linux_process_info *
+arm_linux_add_process (pid_t pid)
+{
+ struct arm_linux_process_info *proc;
+
+ proc = XCNEW (struct arm_linux_process_info);
+ proc->pid = pid;
+
+ proc->next = arm_linux_process_list;
+ arm_linux_process_list = proc;
+
+ return proc;
+}
+
+/* Get data specific info for process PID, creating it if necessary.
+ Never returns NULL. */
+
+static struct arm_linux_process_info *
+arm_linux_process_info_get (pid_t pid)
+{
+ struct arm_linux_process_info *proc;
+
+ proc = arm_linux_find_process_pid (pid);
+ if (proc == NULL)
+ proc = arm_linux_add_process (pid);
+
+ return proc;
+}
- t = NULL;
+/* Called whenever GDB is no longer debugging process PID. It deletes
+ data structures that keep track of debug register state. */
- if (alloc_new)
+void
+arm_linux_nat_target::low_forget_process (pid_t pid)
+{
+ struct arm_linux_process_info *proc, **proc_link;
+
+ proc = arm_linux_process_list;
+ proc_link = &arm_linux_process_list;
+
+ while (proc != NULL)
+ {
+ if (proc->pid == pid)
{
- t = xmalloc (sizeof (struct arm_linux_thread_points));
- t->tid = tid;
- t->bpts = xzalloc (arm_linux_get_hw_breakpoint_count ()
- * sizeof (struct arm_linux_hw_breakpoint));
- t->wpts = xzalloc (arm_linux_get_hw_watchpoint_count ()
- * sizeof (struct arm_linux_hw_breakpoint));
- VEC_safe_push (arm_linux_thread_points_p, arm_threads, t);
+ *proc_link = proc->next;
+
+ xfree (proc);
+ return;
}
- return t;
+ proc_link = &proc->next;
+ proc = *proc_link;
+ }
+}
+
+/* Get hardware break-/watchpoint state for process PID. */
+
+static struct arm_linux_debug_reg_state *
+arm_linux_get_debug_reg_state (pid_t pid)
+{
+ return &arm_linux_process_info_get (pid)->state;
}
/* Initialize an ARM hardware break-/watch-point control register value.
struct arm_linux_hw_breakpoint *p)
{
unsigned mask;
- CORE_ADDR address = bp_tgt->placed_address;
+ CORE_ADDR address = bp_tgt->placed_address = bp_tgt->reqstd_address;
/* We have to create a mask for the control register which says which bits
of the word pointed to by address to break on. */
p->control = arm_hwbp_control_initialize (mask, arm_hwbp_break, 1);
}
-/* Get the ARM hardware breakpoint type from the RW value we're given when
- asked to set a watchpoint. */
+/* Get the ARM hardware breakpoint type from the TYPE value we're
+ given when asked to set a watchpoint. */
static arm_hwbp_type
-arm_linux_get_hwbp_type (int rw)
+arm_linux_get_hwbp_type (enum target_hw_bp_type type)
{
- if (rw == hw_read)
+ if (type == hw_read)
return arm_hwbp_load;
- else if (rw == hw_write)
+ else if (type == hw_write)
return arm_hwbp_store;
else
return arm_hwbp_access;
/* Initialize the hardware breakpoint structure P for a watchpoint at ADDR
to LEN. The type of watchpoint is given in RW. */
static void
-arm_linux_hw_watchpoint_initialize (CORE_ADDR addr, int len, int rw,
+arm_linux_hw_watchpoint_initialize (CORE_ADDR addr, int len,
+ enum target_hw_bp_type type,
struct arm_linux_hw_breakpoint *p)
{
const struct arm_linux_hwbp_cap *cap = arm_linux_get_hwbp_cap ();
p->address = (unsigned int) addr;
p->control = arm_hwbp_control_initialize (mask,
- arm_linux_get_hwbp_type (rw), 1);
+ arm_linux_get_hwbp_type (type), 1);
}
/* Are two break-/watch-points equal? */
return p1->address == p2->address && p1->control == p2->control;
}
+/* Callback to mark a watch-/breakpoint to be updated in all threads of
+ the current process. */
+
+static int
+update_registers_callback (struct lwp_info *lwp, int watch, int index)
+{
+ if (lwp->arch_private == NULL)
+ lwp->arch_private = XCNEW (struct arch_lwp_info);
+
+ /* The actual update is done later just before resuming the lwp,
+ we just mark that the registers need updating. */
+ if (watch)
+ lwp->arch_private->wpts_changed[index] = 1;
+ else
+ lwp->arch_private->bpts_changed[index] = 1;
+
+ /* If the lwp isn't stopped, force it to momentarily pause, so
+ we can update its breakpoint registers. */
+ if (!lwp->stopped)
+ linux_stop_lwp (lwp);
+
+ return 0;
+}
+
/* Insert the hardware breakpoint (WATCHPOINT = 0) or watchpoint (WATCHPOINT
=1) BPT for thread TID. */
static void
arm_linux_insert_hw_breakpoint1 (const struct arm_linux_hw_breakpoint* bpt,
- int tid, int watchpoint)
+ int watchpoint)
{
- struct arm_linux_thread_points *t = arm_linux_find_breakpoints_by_tid (tid, 1);
+ int pid;
+ ptid_t pid_ptid;
gdb_byte count, i;
struct arm_linux_hw_breakpoint* bpts;
- int dir;
- gdb_assert (t != NULL);
+ pid = inferior_ptid.pid ();
+ pid_ptid = ptid_t (pid);
if (watchpoint)
{
count = arm_linux_get_hw_watchpoint_count ();
- bpts = t->wpts;
- dir = -1;
+ bpts = arm_linux_get_debug_reg_state (pid)->wpts;
}
else
{
count = arm_linux_get_hw_breakpoint_count ();
- bpts = t->bpts;
- dir = 1;
+ bpts = arm_linux_get_debug_reg_state (pid)->bpts;
}
for (i = 0; i < count; ++i)
if (!arm_hwbp_control_is_enabled (bpts[i].control))
{
- errno = 0;
- if (ptrace (PTRACE_SETHBPREGS, tid, dir * ((i << 1) + 1),
- &bpt->address) < 0)
- perror_with_name (_("Unexpected error setting breakpoint address"));
- if (ptrace (PTRACE_SETHBPREGS, tid, dir * ((i << 1) + 2),
- &bpt->control) < 0)
- perror_with_name (_("Unexpected error setting breakpoint"));
-
- memcpy (bpts + i, bpt, sizeof (struct arm_linux_hw_breakpoint));
+ bpts[i] = *bpt;
+ iterate_over_lwps (pid_ptid,
+ [=] (struct lwp_info *info)
+ {
+ return update_registers_callback (info, watchpoint,
+ i);
+ });
break;
}
(WATCHPOINT = 1) BPT for thread TID. */
static void
arm_linux_remove_hw_breakpoint1 (const struct arm_linux_hw_breakpoint *bpt,
- int tid, int watchpoint)
+ int watchpoint)
{
- struct arm_linux_thread_points *t = arm_linux_find_breakpoints_by_tid (tid, 0);
+ int pid;
gdb_byte count, i;
- struct arm_linux_hw_breakpoint *bpts;
- int dir;
+ ptid_t pid_ptid;
+ struct arm_linux_hw_breakpoint* bpts;
- gdb_assert (t != NULL);
+ pid = inferior_ptid.pid ();
+ pid_ptid = ptid_t (pid);
if (watchpoint)
{
count = arm_linux_get_hw_watchpoint_count ();
- bpts = t->wpts;
- dir = -1;
+ bpts = arm_linux_get_debug_reg_state (pid)->wpts;
}
else
{
count = arm_linux_get_hw_breakpoint_count ();
- bpts = t->bpts;
- dir = 1;
+ bpts = arm_linux_get_debug_reg_state (pid)->bpts;
}
for (i = 0; i < count; ++i)
if (arm_linux_hw_breakpoint_equal (bpt, bpts + i))
{
- errno = 0;
bpts[i].control = arm_hwbp_control_disable (bpts[i].control);
- if (ptrace (PTRACE_SETHBPREGS, tid, dir * ((i << 1) + 2),
- &bpts[i].control) < 0)
- perror_with_name (_("Unexpected error clearing breakpoint"));
+ iterate_over_lwps (pid_ptid,
+ [=] (struct lwp_info *info)
+ {
+ return update_registers_callback (info, watchpoint,
+ i);
+ });
break;
}
}
/* Insert a Hardware breakpoint. */
-static int
-arm_linux_insert_hw_breakpoint (struct target_ops *self,
- struct gdbarch *gdbarch,
- struct bp_target_info *bp_tgt)
+int
+arm_linux_nat_target::insert_hw_breakpoint (struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt)
{
- struct lwp_info *lp;
struct arm_linux_hw_breakpoint p;
if (arm_linux_get_hw_breakpoint_count () == 0)
return -1;
arm_linux_hw_breakpoint_initialize (gdbarch, bp_tgt, &p);
- ALL_LWPS (lp)
- arm_linux_insert_hw_breakpoint1 (&p, ptid_get_lwp (lp->ptid), 0);
+
+ arm_linux_insert_hw_breakpoint1 (&p, 0);
return 0;
}
/* Remove a hardware breakpoint. */
-static int
-arm_linux_remove_hw_breakpoint (struct target_ops *self,
- struct gdbarch *gdbarch,
- struct bp_target_info *bp_tgt)
+int
+arm_linux_nat_target::remove_hw_breakpoint (struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt)
{
- struct lwp_info *lp;
struct arm_linux_hw_breakpoint p;
if (arm_linux_get_hw_breakpoint_count () == 0)
return -1;
arm_linux_hw_breakpoint_initialize (gdbarch, bp_tgt, &p);
- ALL_LWPS (lp)
- arm_linux_remove_hw_breakpoint1 (&p, ptid_get_lwp (lp->ptid), 0);
+
+ arm_linux_remove_hw_breakpoint1 (&p, 0);
return 0;
}
/* Are we able to use a hardware watchpoint for the LEN bytes starting at
ADDR? */
-static int
-arm_linux_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
+int
+arm_linux_nat_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
{
const struct arm_linux_hwbp_cap *cap = arm_linux_get_hwbp_cap ();
CORE_ADDR max_wp_length, aligned_addr;
}
/* Insert a Hardware breakpoint. */
-static int
-arm_linux_insert_watchpoint (struct target_ops *self,
- CORE_ADDR addr, int len, int rw,
- struct expression *cond)
+int
+arm_linux_nat_target::insert_watchpoint (CORE_ADDR addr, int len,
+ enum target_hw_bp_type rw,
+ struct expression *cond)
{
- struct lwp_info *lp;
struct arm_linux_hw_breakpoint p;
if (arm_linux_get_hw_watchpoint_count () == 0)
return -1;
arm_linux_hw_watchpoint_initialize (addr, len, rw, &p);
- ALL_LWPS (lp)
- arm_linux_insert_hw_breakpoint1 (&p, ptid_get_lwp (lp->ptid), 1);
+
+ arm_linux_insert_hw_breakpoint1 (&p, 1);
return 0;
}
/* Remove a hardware breakpoint. */
-static int
-arm_linux_remove_watchpoint (struct target_ops *self,
- CORE_ADDR addr, int len, int rw,
- struct expression *cond)
+int
+arm_linux_nat_target::remove_watchpoint (CORE_ADDR addr,
+ int len, enum target_hw_bp_type rw,
+ struct expression *cond)
{
- struct lwp_info *lp;
struct arm_linux_hw_breakpoint p;
if (arm_linux_get_hw_watchpoint_count () == 0)
return -1;
arm_linux_hw_watchpoint_initialize (addr, len, rw, &p);
- ALL_LWPS (lp)
- arm_linux_remove_hw_breakpoint1 (&p, ptid_get_lwp (lp->ptid), 1);
+
+ arm_linux_remove_hw_breakpoint1 (&p, 1);
return 0;
}
/* What was the data address the target was stopped on accessing. */
-static int
-arm_linux_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
+bool
+arm_linux_nat_target::stopped_data_address (CORE_ADDR *addr_p)
{
siginfo_t siginfo;
int slot;
if (!linux_nat_get_siginfo (inferior_ptid, &siginfo))
- return 0;
+ return false;
/* This must be a hardware breakpoint. */
if (siginfo.si_signo != SIGTRAP
|| (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */)
- return 0;
+ return false;
/* We must be able to set hardware watchpoints. */
if (arm_linux_get_hw_watchpoint_count () == 0)
/* If we are in a positive slot then we're looking at a breakpoint and not
a watchpoint. */
if (slot >= 0)
- return 0;
+ return false;
*addr_p = (CORE_ADDR) (uintptr_t) siginfo.si_addr;
- return 1;
+ return true;
}
/* Has the target been stopped by hitting a watchpoint? */
-static int
-arm_linux_stopped_by_watchpoint (struct target_ops *ops)
+bool
+arm_linux_nat_target::stopped_by_watchpoint ()
{
CORE_ADDR addr;
- return arm_linux_stopped_data_address (ops, &addr);
+ return stopped_data_address (&addr);
}
-static int
-arm_linux_watchpoint_addr_within_range (struct target_ops *target,
- CORE_ADDR addr,
- CORE_ADDR start, int length)
+bool
+arm_linux_nat_target::watchpoint_addr_within_range (CORE_ADDR addr,
+ CORE_ADDR start,
+ int length)
{
return start <= addr && start + length - 1 >= addr;
}
/* Handle thread creation. We need to copy the breakpoints and watchpoints
in the parent thread to the child thread. */
-static void
-arm_linux_new_thread (struct lwp_info *lp)
+void
+arm_linux_nat_target::low_new_thread (struct lwp_info *lp)
{
- int tid = ptid_get_lwp (lp->ptid);
- const struct arm_linux_hwbp_cap *info = arm_linux_get_hwbp_cap ();
+ int i;
+ struct arch_lwp_info *info = XCNEW (struct arch_lwp_info);
- if (info != NULL)
+ /* Mark that all the hardware breakpoint/watchpoint register pairs
+ for this thread need to be initialized. */
+
+ for (i = 0; i < MAX_BPTS; i++)
{
- int i;
- struct arm_linux_thread_points *p;
- struct arm_linux_hw_breakpoint *bpts;
-
- if (VEC_empty (arm_linux_thread_points_p, arm_threads))
- return;
-
- /* Get a list of breakpoints from any thread. */
- p = VEC_last (arm_linux_thread_points_p, arm_threads);
-
- /* Copy that thread's breakpoints and watchpoints to the new thread. */
- for (i = 0; i < info->bp_count; i++)
- if (arm_hwbp_control_is_enabled (p->bpts[i].control))
- arm_linux_insert_hw_breakpoint1 (p->bpts + i, tid, 0);
- for (i = 0; i < info->wp_count; i++)
- if (arm_hwbp_control_is_enabled (p->wpts[i].control))
- arm_linux_insert_hw_breakpoint1 (p->wpts + i, tid, 1);
+ info->bpts_changed[i] = 1;
+ info->wpts_changed[i] = 1;
}
+
+ lp->arch_private = info;
}
-/* Handle thread exit. Tidy up the memory that has been allocated for the
- thread. */
-static void
-arm_linux_thread_exit (struct thread_info *tp, int silent)
+/* Function to call when a thread is being deleted. */
+
+void
+arm_linux_nat_target::low_delete_thread (struct arch_lwp_info *arch_lwp)
{
- const struct arm_linux_hwbp_cap *info = arm_linux_get_hwbp_cap ();
+ xfree (arch_lwp);
+}
- if (info != NULL)
- {
- int i;
- int tid = ptid_get_lwp (tp->ptid);
- struct arm_linux_thread_points *t = NULL, *p;
+/* Called when resuming a thread.
+ The hardware debug registers are updated when there is any change. */
- for (i = 0;
- VEC_iterate (arm_linux_thread_points_p, arm_threads, i, p); i++)
- {
- if (p->tid == tid)
- {
- t = p;
- break;
- }
- }
+void
+arm_linux_nat_target::low_prepare_to_resume (struct lwp_info *lwp)
+{
+ int pid, i;
+ struct arm_linux_hw_breakpoint *bpts, *wpts;
+ struct arch_lwp_info *arm_lwp_info = lwp->arch_private;
+
+ pid = lwp->ptid.lwp ();
+ bpts = arm_linux_get_debug_reg_state (lwp->ptid.pid ())->bpts;
+ wpts = arm_linux_get_debug_reg_state (lwp->ptid.pid ())->wpts;
+
+ /* NULL means this is the main thread still going through the shell,
+ or, no watchpoint has been set yet. In that case, there's
+ nothing to do. */
+ if (arm_lwp_info == NULL)
+ return;
- if (t == NULL)
- return;
+ for (i = 0; i < arm_linux_get_hw_breakpoint_count (); i++)
+ if (arm_lwp_info->bpts_changed[i])
+ {
+ errno = 0;
+ if (arm_hwbp_control_is_enabled (bpts[i].control))
+ if (ptrace (PTRACE_SETHBPREGS, pid,
+ (PTRACE_TYPE_ARG3) ((i << 1) + 1), &bpts[i].address) < 0)
+ perror_with_name (_("Unexpected error setting breakpoint"));
- VEC_unordered_remove (arm_linux_thread_points_p, arm_threads, i);
+ if (bpts[i].control != 0)
+ if (ptrace (PTRACE_SETHBPREGS, pid,
+ (PTRACE_TYPE_ARG3) ((i << 1) + 2), &bpts[i].control) < 0)
+ perror_with_name (_("Unexpected error setting breakpoint"));
- xfree (t->bpts);
- xfree (t->wpts);
- xfree (t);
- }
+ arm_lwp_info->bpts_changed[i] = 0;
+ }
+
+ for (i = 0; i < arm_linux_get_hw_watchpoint_count (); i++)
+ if (arm_lwp_info->wpts_changed[i])
+ {
+ errno = 0;
+ if (arm_hwbp_control_is_enabled (wpts[i].control))
+ if (ptrace (PTRACE_SETHBPREGS, pid,
+ (PTRACE_TYPE_ARG3) -((i << 1) + 1), &wpts[i].address) < 0)
+ perror_with_name (_("Unexpected error setting watchpoint"));
+
+ if (wpts[i].control != 0)
+ if (ptrace (PTRACE_SETHBPREGS, pid,
+ (PTRACE_TYPE_ARG3) -((i << 1) + 2), &wpts[i].control) < 0)
+ perror_with_name (_("Unexpected error setting watchpoint"));
+
+ arm_lwp_info->wpts_changed[i] = 0;
+ }
}
-void _initialize_arm_linux_nat (void);
+/* linux_nat_new_fork hook. */
void
-_initialize_arm_linux_nat (void)
+arm_linux_nat_target::low_new_fork (struct lwp_info *parent, pid_t child_pid)
{
- struct target_ops *t;
+ pid_t parent_pid;
+ struct arm_linux_debug_reg_state *parent_state;
+ struct arm_linux_debug_reg_state *child_state;
- /* Fill in the generic GNU/Linux methods. */
- t = linux_target ();
+ /* NULL means no watchpoint has ever been set in the parent. In
+ that case, there's nothing to do. */
+ if (parent->arch_private == NULL)
+ return;
- /* Add our register access methods. */
- t->to_fetch_registers = arm_linux_fetch_inferior_registers;
- t->to_store_registers = arm_linux_store_inferior_registers;
+ /* GDB core assumes the child inherits the watchpoints/hw
+ breakpoints of the parent, and will remove them all from the
+ forked off process. Copy the debug registers mirrors into the
+ new process so that all breakpoints and watchpoints can be
+ removed together. */
- /* Add our hardware breakpoint and watchpoint implementation. */
- t->to_can_use_hw_breakpoint = arm_linux_can_use_hw_breakpoint;
- t->to_insert_hw_breakpoint = arm_linux_insert_hw_breakpoint;
- t->to_remove_hw_breakpoint = arm_linux_remove_hw_breakpoint;
- t->to_region_ok_for_hw_watchpoint = arm_linux_region_ok_for_hw_watchpoint;
- t->to_insert_watchpoint = arm_linux_insert_watchpoint;
- t->to_remove_watchpoint = arm_linux_remove_watchpoint;
- t->to_stopped_by_watchpoint = arm_linux_stopped_by_watchpoint;
- t->to_stopped_data_address = arm_linux_stopped_data_address;
- t->to_watchpoint_addr_within_range = arm_linux_watchpoint_addr_within_range;
-
- t->to_read_description = arm_linux_read_description;
+ parent_pid = parent->ptid.pid ();
+ parent_state = arm_linux_get_debug_reg_state (parent_pid);
+ child_state = arm_linux_get_debug_reg_state (child_pid);
+ *child_state = *parent_state;
+}
+void _initialize_arm_linux_nat ();
+void
+_initialize_arm_linux_nat ()
+{
/* Register the target. */
- linux_nat_add_target (t);
-
- /* Handle thread creation and exit */
- observer_attach_thread_exit (arm_linux_thread_exit);
- linux_nat_set_new_thread (t, arm_linux_new_thread);
+ linux_target = &the_arm_linux_nat_target;
+ add_inf_child_target (&the_arm_linux_nat_target);
}
projects / thirdparty / binutils-gdb.git / blobdiff