/* Native-dependent code for GNU/Linux AArch64.
- Copyright (C) 2011-2015 Free Software Foundation, Inc.
+ Copyright (C) 2011-2016 Free Software Foundation, Inc.
Contributed by ARM Ltd.
This file is part of GDB.
{
struct aarch64_process_info *proc;
- proc = xcalloc (1, sizeof (*proc));
+ proc = XCNEW (struct aarch64_process_info);
proc->pid = pid;
proc->next = aarch64_process_list;
AARCH64_LINUX_SIZEOF_FPREGSET);
}
-static void
-aarch64_linux_new_thread (struct lwp_info *lp)
-{
- struct arch_lwp_info *info = XCNEW (struct arch_lwp_info);
-
- /* Mark that all the hardware breakpoint/watchpoint register pairs
- for this thread need to be initialized. */
- DR_MARK_ALL_CHANGED (info->dr_changed_bp, aarch64_num_bp_regs);
- DR_MARK_ALL_CHANGED (info->dr_changed_wp, aarch64_num_wp_regs);
-
- lp->arch_private = info;
-}
-
/* linux_nat_new_fork hook. */
static void
ps_get_thread_area (const struct ps_prochandle *ph,
lwpid_t lwpid, int idx, void **base)
{
- struct iovec iovec;
- uint64_t reg;
-
- iovec.iov_base = ®
- iovec.iov_len = sizeof (reg);
-
- if (ptrace (PTRACE_GETREGSET, lwpid, NT_ARM_TLS, &iovec) != 0)
- return PS_ERR;
+ int is_64bit_p
+ = (gdbarch_bfd_arch_info (target_gdbarch ())->bits_per_word == 64);
- /* IDX is the bias from the thread pointer to the beginning of the
- thread descriptor. It has to be subtracted due to implementation
- quirks in libthread_db. */
- *base = (void *) (reg - idx);
-
- return PS_OK;
+ return aarch64_ps_get_thread_area (ph, lwpid, idx, base, is_64bit_p);
}
\f
super_post_startup_inferior (self, ptid);
}
-extern struct target_desc *tdesc_arm_with_vfpv3;
extern struct target_desc *tdesc_arm_with_neon;
/* Implement the "to_read_description" target_ops method. */
static const struct target_desc *
aarch64_linux_read_description (struct target_ops *ops)
{
- CORE_ADDR at_phent;
+ int ret, tid;
+ gdb_byte regbuf[VFP_REGS_SIZE];
+ struct iovec iovec;
- if (target_auxv_search (ops, AT_PHENT, &at_phent) == 1)
- {
- if (at_phent == sizeof (Elf64_External_Phdr))
- return tdesc_aarch64;
- else
- {
- CORE_ADDR arm_hwcap = 0;
+ tid = ptid_get_lwp (inferior_ptid);
- if (target_auxv_search (ops, AT_HWCAP, &arm_hwcap) != 1)
- return ops->beneath->to_read_description (ops->beneath);
+ iovec.iov_base = regbuf;
+ iovec.iov_len = VFP_REGS_SIZE;
-#ifndef COMPAT_HWCAP_VFP
-#define COMPAT_HWCAP_VFP (1 << 6)
-#endif
-#ifndef COMPAT_HWCAP_NEON
-#define COMPAT_HWCAP_NEON (1 << 12)
-#endif
-#ifndef COMPAT_HWCAP_VFPv3
-#define COMPAT_HWCAP_VFPv3 (1 << 13)
-#endif
+ ret = ptrace (PTRACE_GETREGSET, tid, NT_ARM_VFP, &iovec);
+ if (ret == 0)
+ return tdesc_arm_with_neon;
+ else
+ return tdesc_aarch64;
+}
- if (arm_hwcap & COMPAT_HWCAP_VFP)
- {
- char *buf;
- const struct target_desc *result = NULL;
+/* Convert a native/host siginfo object, into/from the siginfo in the
+ layout of the inferiors' architecture. Returns true if any
+ conversion was done; false otherwise. If DIRECTION is 1, then copy
+ from INF to NATIVE. If DIRECTION is 0, copy from NATIVE to
+ INF. */
- if (arm_hwcap & COMPAT_HWCAP_NEON)
- result = tdesc_arm_with_neon;
- else if (arm_hwcap & COMPAT_HWCAP_VFPv3)
- result = tdesc_arm_with_vfpv3;
+static int
+aarch64_linux_siginfo_fixup (siginfo_t *native, gdb_byte *inf, int direction)
+{
+ struct gdbarch *gdbarch = get_frame_arch (get_current_frame ());
- return result;
- }
+ /* Is the inferior 32-bit? If so, then do fixup the siginfo
+ object. */
+ if (gdbarch_bfd_arch_info (gdbarch)->bits_per_word == 32)
+ {
+ if (direction == 0)
+ aarch64_compat_siginfo_from_siginfo ((struct compat_siginfo *) inf,
+ native);
+ else
+ aarch64_siginfo_from_compat_siginfo (native,
+ (struct compat_siginfo *) inf);
- return NULL;
- }
+ return 1;
}
- return tdesc_aarch64;
+ return 0;
}
/* Returns the number of hardware watchpoints of type TYPE that we can
{
int ret;
CORE_ADDR addr = bp_tgt->placed_address = bp_tgt->reqstd_address;
- const int len = 4;
+ int len;
const enum target_hw_bp_type type = hw_execute;
struct aarch64_debug_reg_state *state
= aarch64_get_debug_reg_state (ptid_get_pid (inferior_ptid));
+ gdbarch_breakpoint_from_pc (gdbarch, &addr, &len);
+
if (show_debug_regs)
fprintf_unfiltered
(gdb_stdlog,
{
int ret;
CORE_ADDR addr = bp_tgt->placed_address;
- const int len = 4;
+ int len = 4;
const enum target_hw_bp_type type = hw_execute;
struct aarch64_debug_reg_state *state
= aarch64_get_debug_reg_state (ptid_get_pid (inferior_ptid));
+ gdbarch_breakpoint_from_pc (gdbarch, &addr, &len);
+
if (show_debug_regs)
fprintf_unfiltered
(gdb_stdlog, "remove_hw_breakpoint on entry (addr=0x%08lx, len=%d))\n",
aarch64_linux_region_ok_for_hw_watchpoint (struct target_ops *self,
CORE_ADDR addr, int len)
{
- CORE_ADDR aligned_addr;
-
- /* Can not set watchpoints for zero or negative lengths. */
- if (len <= 0)
- return 0;
-
- /* Must have hardware watchpoint debug register(s). */
- if (aarch64_num_wp_regs == 0)
- return 0;
-
- /* We support unaligned watchpoint address and arbitrary length,
- as long as the size of the whole watched area after alignment
- doesn't exceed size of the total area that all watchpoint debug
- registers can watch cooperatively.
-
- This is a very relaxed rule, but unfortunately there are
- limitations, e.g. false-positive hits, due to limited support of
- hardware debug registers in the kernel. See comment above
- aarch64_align_watchpoint for more information. */
-
- aligned_addr = addr & ~(AARCH64_HWP_MAX_LEN_PER_REG - 1);
- if (aligned_addr + aarch64_num_wp_regs * AARCH64_HWP_MAX_LEN_PER_REG
- < addr + len)
- return 0;
-
- /* All tests passed so we are likely to be able to set the watchpoint.
- The reason that it is 'likely' rather than 'must' is because
- we don't check the current usage of the watchpoint registers, and
- there may not be enough registers available for this watchpoint.
- Ideally we should check the cached debug register state, however
- the checking is costly. */
- return 1;
+ return aarch64_linux_region_ok_for_watchpoint (addr, len);
}
/* Implement the "to_stopped_data_address" target_ops method. */
return start <= addr && start + length - 1 >= addr;
}
+/* Implement the "to_can_do_single_step" target_ops method. */
+
+static int
+aarch64_linux_can_do_single_step (struct target_ops *target)
+{
+ return 1;
+}
+
/* Define AArch64 maintenance commands. */
static void
t->to_stopped_data_address = aarch64_linux_stopped_data_address;
t->to_watchpoint_addr_within_range =
aarch64_linux_watchpoint_addr_within_range;
+ t->to_can_do_single_step = aarch64_linux_can_do_single_step;
/* Override the GNU/Linux inferior startup hook. */
super_post_startup_inferior = t->to_post_startup_inferior;
linux_nat_set_new_fork (t, aarch64_linux_new_fork);
linux_nat_set_forget_process (t, aarch64_forget_process);
linux_nat_set_prepare_to_resume (t, aarch64_linux_prepare_to_resume);
+
+ /* Add our siginfo layout converter. */
+ linux_nat_set_siginfo_fixup (t, aarch64_linux_siginfo_fixup);
}
projects / deliverable / binutils-gdb.git / blobdiff