/* GNU/Linux/ARM specific low level interface, for the remote server for GDB.
- Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
- 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+ Copyright (C) 1995-1996, 1998-2012 Free Software Foundation, Inc.
This file is part of GDB.
#endif
/* Information describing the hardware breakpoint capabilities. */
-struct arm_linux_hwbp_cap
+static struct
{
unsigned char arch;
unsigned char max_wp_length;
unsigned char wp_count;
unsigned char bp_count;
-};
+} arm_linux_hwbp_cap;
/* Enum describing the different types of ARM hardware break-/watch-points. */
typedef enum
}
-/* 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. */
-static const struct arm_linux_hwbp_cap *
-arm_linux_get_hwbp_cap (void)
+/* Query Hardware Breakpoint information for the target we are attached to
+ (using PID as ptrace argument) and set up arm_linux_hwbp_cap. */
+static void
+arm_linux_init_hwbp_cap (int pid)
{
- /* The info structure we return. */
- static struct arm_linux_hwbp_cap info;
+ unsigned int val;
- /* Is INFO in a good state? -1 means that no attempt has been made to
- initialize INFO; 0 means an attempt has been made, but it failed; 1
- means INFO is in an initialized state. */
- static int available = -1;
-
- if (available == -1)
- {
- int pid = lwpid_of (get_thread_lwp (current_inferior));
- unsigned int val;
+ if (ptrace (PTRACE_GETHBPREGS, pid, 0, &val) < 0)
+ return;
- if (ptrace (PTRACE_GETHBPREGS, pid, 0, &val) < 0)
- available = 0;
- else
- {
- info.arch = (unsigned char)((val >> 24) & 0xff);
- info.max_wp_length = (unsigned char)((val >> 16) & 0xff);
- info.wp_count = (unsigned char)((val >> 8) & 0xff);
- info.bp_count = (unsigned char)(val & 0xff);
- available = (info.arch != 0);
- }
+ arm_linux_hwbp_cap.arch = (unsigned char)((val >> 24) & 0xff);
+ if (arm_linux_hwbp_cap.arch == 0)
+ return;
- if (available)
- {
- if (info.wp_count > MAX_WPTS)
- internal_error (__FILE__, __LINE__,
- "Unsupported number of watchpoints");
- if (info.bp_count > MAX_BPTS)
- internal_error (__FILE__, __LINE__,
- "Unsupported number of breakpoints");
- }
- }
+ arm_linux_hwbp_cap.max_wp_length = (unsigned char)((val >> 16) & 0xff);
+ arm_linux_hwbp_cap.wp_count = (unsigned char)((val >> 8) & 0xff);
+ arm_linux_hwbp_cap.bp_count = (unsigned char)(val & 0xff);
- return available == 1 ? &info : NULL;
+ if (arm_linux_hwbp_cap.wp_count > MAX_WPTS)
+ internal_error (__FILE__, __LINE__, "Unsupported number of watchpoints");
+ if (arm_linux_hwbp_cap.bp_count > MAX_BPTS)
+ internal_error (__FILE__, __LINE__, "Unsupported number of breakpoints");
}
/* How many hardware breakpoints are available? */
static int
arm_linux_get_hw_breakpoint_count (void)
{
- const struct arm_linux_hwbp_cap *cap = arm_linux_get_hwbp_cap ();
- return cap != NULL ? cap->bp_count : 0;
+ return arm_linux_hwbp_cap.bp_count;
}
/* How many hardware watchpoints are available? */
static int
arm_linux_get_hw_watchpoint_count (void)
{
- const struct arm_linux_hwbp_cap *cap = arm_linux_get_hwbp_cap ();
- return cap != NULL ? cap->wp_count : 0;
+ return arm_linux_hwbp_cap.wp_count;
}
/* Maximum length of area watched by hardware watchpoint. */
static int
arm_linux_get_hw_watchpoint_max_length (void)
{
- const struct arm_linux_hwbp_cap *cap = arm_linux_get_hwbp_cap ();
- return cap != NULL ? cap->max_wp_length : 0;
+ return arm_linux_hwbp_cap.max_wp_length;
}
/* Initialize an ARM hardware break-/watch-point control register value.
arm_stopped_by_watchpoint (void)
{
struct lwp_info *lwp = get_thread_lwp (current_inferior);
- struct siginfo siginfo;
+ siginfo_t siginfo;
/* We must be able to set hardware watchpoints. */
if (arm_linux_get_hw_watchpoint_count () == 0)
errno = 0;
if (arm_hwbp_control_is_enabled (proc_info->bpts[i].control))
- if (ptrace (PTRACE_SETHBPREGS, pid, ((i << 1) + 1),
- &proc_info->bpts[i].address) < 0)
- error (_("Unexpected error setting breakpoint address"));
+ if (ptrace (PTRACE_SETHBPREGS, pid,
+ (PTRACE_ARG3_TYPE) ((i << 1) + 1),
+ &proc_info->bpts[i].address) < 0)
+ perror_with_name ("Unexpected error setting breakpoint address");
if (arm_hwbp_control_is_initialized (proc_info->bpts[i].control))
- if (ptrace (PTRACE_SETHBPREGS, pid, ((i << 1) + 2),
- &proc_info->bpts[i].control) < 0)
- error (_("Unexpected error setting breakpoint"));
+ if (ptrace (PTRACE_SETHBPREGS, pid,
+ (PTRACE_ARG3_TYPE) ((i << 1) + 2),
+ &proc_info->bpts[i].control) < 0)
+ perror_with_name ("Unexpected error setting breakpoint");
lwp_info->bpts_changed[i] = 0;
}
errno = 0;
if (arm_hwbp_control_is_enabled (proc_info->wpts[i].control))
- if (ptrace (PTRACE_SETHBPREGS, pid, -((i << 1) + 1),
- &proc_info->wpts[i].address) < 0)
- error (_("Unexpected error setting watchpoint address"));
+ if (ptrace (PTRACE_SETHBPREGS, pid,
+ (PTRACE_ARG3_TYPE) -((i << 1) + 1),
+ &proc_info->wpts[i].address) < 0)
+ perror_with_name ("Unexpected error setting watchpoint address");
if (arm_hwbp_control_is_initialized (proc_info->wpts[i].control))
- if (ptrace (PTRACE_SETHBPREGS, pid, -((i << 1) + 2),
- &proc_info->wpts[i].control) < 0)
- error (_("Unexpected error setting watchpoint"));
+ if (ptrace (PTRACE_SETHBPREGS, pid,
+ (PTRACE_ARG3_TYPE) -((i << 1) + 2),
+ &proc_info->wpts[i].control) < 0)
+ perror_with_name ("Unexpected error setting watchpoint");
lwp_info->wpts_changed[i] = 0;
}
static void
arm_arch_setup (void)
{
+ int pid = lwpid_of (get_thread_lwp (current_inferior));
+
+ /* Query hardware watchpoint/breakpoint capabilities. */
+ arm_linux_init_hwbp_cap (pid);
+
arm_hwcap = 0;
if (arm_get_hwcap (&arm_hwcap) == 0)
{
if (arm_hwcap & HWCAP_VFP)
{
- int pid;
char *buf;
/* NEON implies either no VFP, or VFPv3-D32. We only support
/* Now make sure that the kernel supports reading these
registers. Support was added in 2.6.30. */
- pid = lwpid_of (get_thread_lwp (current_inferior));
errno = 0;
buf = xmalloc (32 * 8 + 4);
if (ptrace (PTRACE_GETVFPREGS, pid, 0, buf) < 0
arm_arch_setup,
arm_num_regs,
arm_regmap,
+ NULL,
arm_cannot_fetch_register,
arm_cannot_store_register,
+ NULL, /* fetch_register */
arm_get_pc,
arm_set_pc,
projects / deliverable / binutils-gdb.git / blobdiff