/* Native-dependent code for GNU/Linux on MIPS processors.
- Copyright (C) 2001-2012 Free Software Foundation, Inc.
+ Copyright (C) 2001-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "command.h"
#include "gdbcmd.h"
-#include "gdb_assert.h"
#include "inferior.h"
#include "mips-tdep.h"
#include "target.h"
#include "regcache.h"
-#include "linux-nat.h"
+#include "linux-nat-trad.h"
#include "mips-linux-tdep.h"
#include "target-descriptions.h"
#include "gregset.h"
#include <sgidefs.h>
-#include <sys/ptrace.h>
+#include "nat/gdb_ptrace.h"
+#include <asm/ptrace.h>
+#include "inf-ptrace.h"
-#include "features/mips-linux.c"
-#include "features/mips-dsp-linux.c"
-#include "features/mips64-linux.c"
-#include "features/mips64-dsp-linux.c"
+#include "nat/mips-linux-watch.h"
#ifndef PTRACE_GET_THREAD_AREA
#define PTRACE_GET_THREAD_AREA 25
#endif
-/* Assume that we have PTRACE_GETREGS et al. support. If we do not,
- we'll clear this and use PTRACE_PEEKUSER instead. */
-static int have_ptrace_regsets = 1;
+class mips_linux_nat_target final : public linux_nat_trad_target
+{
+public:
+ /* Add our register access methods. */
+ void fetch_registers (struct regcache *, int) override;
+ void store_registers (struct regcache *, int) override;
+
+ void close () override;
+
+ int can_use_hw_breakpoint (enum bptype, int, int) override;
+
+ int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
+ struct expression *) override;
-/* Whether or not to print the mirrored debug registers. */
+ int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
+ struct expression *) override;
-static int maint_show_dr;
+ bool stopped_by_watchpoint () override;
-/* Saved function pointers to fetch and store a single register using
- PTRACE_PEEKUSER and PTRACE_POKEUSER. */
+ bool stopped_data_address (CORE_ADDR *) override;
-static void (*super_fetch_registers) (struct target_ops *,
- struct regcache *, int);
-static void (*super_store_registers) (struct target_ops *,
- struct regcache *, int);
+ int region_ok_for_hw_watchpoint (CORE_ADDR, int) override;
-static void (*super_close) (int);
+ const struct target_desc *read_description () override;
+
+protected:
+ /* Override linux_nat_trad_target methods. */
+ CORE_ADDR register_u_offset (struct gdbarch *gdbarch,
+ int regno, int store_p) override;
+
+ /* Override linux_nat_target low methods. */
+ void low_new_thread (struct lwp_info *lp) override;
+
+private:
+ /* Helpers. See definitions. */
+ void mips64_regsets_store_registers (struct regcache *regcache,
+ int regno);
+ void mips64_regsets_fetch_registers (struct regcache *regcache,
+ int regno);
+};
+
+static mips_linux_nat_target the_mips_linux_nat_target;
+
+/* Assume that we have PTRACE_GETREGS et al. support. If we do not,
+ we'll clear this and use PTRACE_PEEKUSER instead. */
+static int have_ptrace_regsets = 1;
/* Map gdb internal register number to ptrace ``address''.
These ``addresses'' are normally defined in <asm/ptrace.h>.
if (regno < 0 || regno >= gdbarch_num_regs (gdbarch))
error (_("Bogon register number %d."), regno);
+ /* On n32 we can't access 64-bit registers via PTRACE_PEEKUSR
+ or PTRACE_POKEUSR. */
+ if (register_size (gdbarch, regno) > sizeof (PTRACE_TYPE_RET))
+ return (CORE_ADDR) -1;
+
if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
regaddr = regno;
else if ((regno >= mips_regnum (gdbarch)->fp0)
/* Fetch the thread-local storage pointer for libthread_db. */
ps_err_e
-ps_get_thread_area (const struct ps_prochandle *ph,
+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)
void
supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
{
- if (mips_isa_regsize (get_regcache_arch (regcache)) == 4)
+ if (mips_isa_regsize (regcache->arch ()) == 4)
mips_supply_gregset (regcache, (const mips_elf_gregset_t *) gregsetp);
else
mips64_supply_gregset (regcache, (const mips64_elf_gregset_t *) gregsetp);
fill_gregset (const struct regcache *regcache,
gdb_gregset_t *gregsetp, int regno)
{
- if (mips_isa_regsize (get_regcache_arch (regcache)) == 4)
+ if (mips_isa_regsize (regcache->arch ()) == 4)
mips_fill_gregset (regcache, (mips_elf_gregset_t *) gregsetp, regno);
else
mips64_fill_gregset (regcache, (mips64_elf_gregset_t *) gregsetp, regno);
void
supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
{
- if (mips_isa_regsize (get_regcache_arch (regcache)) == 4)
- mips_supply_fpregset (regcache, (const mips_elf_fpregset_t *) fpregsetp);
- else
- mips64_supply_fpregset (regcache,
- (const mips64_elf_fpregset_t *) fpregsetp);
+ mips64_supply_fpregset (regcache, (const mips64_elf_fpregset_t *) fpregsetp);
}
void
fill_fpregset (const struct regcache *regcache,
gdb_fpregset_t *fpregsetp, int regno)
{
- if (mips_isa_regsize (get_regcache_arch (regcache)) == 4)
- mips_fill_fpregset (regcache, (mips_elf_fpregset_t *) fpregsetp, regno);
- else
- mips64_fill_fpregset (regcache,
- (mips64_elf_fpregset_t *) fpregsetp, regno);
+ mips64_fill_fpregset (regcache, (mips64_elf_fpregset_t *) fpregsetp, regno);
}
/* Fetch REGNO (or all registers if REGNO == -1) from the target
using PTRACE_GETREGS et al. */
-static void
-mips64_linux_regsets_fetch_registers (struct target_ops *ops,
- struct regcache *regcache, int regno)
+void
+mips_linux_nat_target::mips64_regsets_fetch_registers
+ (struct regcache *regcache, int regno)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
int is_fp, is_dsp;
int have_dsp;
int regi;
else
is_dsp = 0;
- tid = ptid_get_lwp (inferior_ptid);
- if (tid == 0)
- tid = ptid_get_pid (inferior_ptid);
+ tid = get_ptrace_pid (regcache->ptid ());
if (regno == -1 || (!is_fp && !is_dsp))
{
}
if (is_dsp)
- super_fetch_registers (ops, regcache, regno);
+ linux_nat_trad_target::fetch_registers (regcache, regno);
else if (regno == -1 && have_dsp)
{
for (regi = mips_regnum (gdbarch)->dspacc;
regi < mips_regnum (gdbarch)->dspacc + 6;
regi++)
- super_fetch_registers (ops, regcache, regi);
- super_fetch_registers (ops, regcache, mips_regnum (gdbarch)->dspctl);
+ linux_nat_trad_target::fetch_registers (regcache, regi);
+ linux_nat_trad_target::fetch_registers (regcache,
+ mips_regnum (gdbarch)->dspctl);
}
}
/* Store REGNO (or all registers if REGNO == -1) to the target
using PTRACE_SETREGS et al. */
-static void
-mips64_linux_regsets_store_registers (struct target_ops *ops,
- struct regcache *regcache, int regno)
+void
+mips_linux_nat_target::mips64_regsets_store_registers
+ (struct regcache *regcache, int regno)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
int is_fp, is_dsp;
int have_dsp;
int regi;
have_dsp = mips_regnum (gdbarch)->dspctl != -1;
if (!have_dsp)
is_dsp = 0;
- if (regno >= mips_regnum (gdbarch)->dspacc
+ else if (regno >= mips_regnum (gdbarch)->dspacc
&& regno < mips_regnum (gdbarch)->dspacc + 6)
is_dsp = 1;
else if (regno == mips_regnum (gdbarch)->dspctl)
else
is_dsp = 0;
- tid = ptid_get_lwp (inferior_ptid);
- if (tid == 0)
- tid = ptid_get_pid (inferior_ptid);
+ tid = get_ptrace_pid (regcache->ptid ());
if (regno == -1 || (!is_fp && !is_dsp))
{
}
if (is_dsp)
- super_store_registers (ops, regcache, regno);
+ linux_nat_trad_target::store_registers (regcache, regno);
else if (regno == -1 && have_dsp)
{
for (regi = mips_regnum (gdbarch)->dspacc;
regi < mips_regnum (gdbarch)->dspacc + 6;
regi++)
- super_store_registers (ops, regcache, regi);
- super_store_registers (ops, regcache, mips_regnum (gdbarch)->dspctl);
+ linux_nat_trad_target::store_registers (regcache, regi);
+ linux_nat_trad_target::store_registers (regcache,
+ mips_regnum (gdbarch)->dspctl);
}
}
/* Fetch REGNO (or all registers if REGNO == -1) from the target
using any working method. */
-static void
-mips64_linux_fetch_registers (struct target_ops *ops,
- struct regcache *regcache, int regnum)
+void
+mips_linux_nat_target::fetch_registers (struct regcache *regcache, int regnum)
{
/* Unless we already know that PTRACE_GETREGS does not work, try it. */
if (have_ptrace_regsets)
- mips64_linux_regsets_fetch_registers (ops, regcache, regnum);
+ mips64_regsets_fetch_registers (regcache, regnum);
/* If we know, or just found out, that PTRACE_GETREGS does not work, fall
back to PTRACE_PEEKUSER. */
if (!have_ptrace_regsets)
- super_fetch_registers (ops, regcache, regnum);
+ {
+ linux_nat_trad_target::fetch_registers (regcache, regnum);
+
+ /* Fill the inaccessible zero register with zero. */
+ if (regnum == MIPS_ZERO_REGNUM || regnum == -1)
+ regcache->raw_supply_zeroed (MIPS_ZERO_REGNUM);
+ }
}
/* Store REGNO (or all registers if REGNO == -1) to the target
using any working method. */
-static void
-mips64_linux_store_registers (struct target_ops *ops,
- struct regcache *regcache, int regnum)
+void
+mips_linux_nat_target::store_registers (struct regcache *regcache, int regnum)
{
/* Unless we already know that PTRACE_GETREGS does not work, try it. */
if (have_ptrace_regsets)
- mips64_linux_regsets_store_registers (ops, regcache, regnum);
+ mips64_regsets_store_registers (regcache, regnum);
/* If we know, or just found out, that PTRACE_GETREGS does not work, fall
back to PTRACE_PEEKUSER. */
if (!have_ptrace_regsets)
- super_store_registers (ops, regcache, regnum);
+ linux_nat_trad_target::store_registers (regcache, regnum);
}
/* Return the address in the core dump or inferior of register
REGNO. */
-static CORE_ADDR
-mips_linux_register_u_offset (struct gdbarch *gdbarch, int regno, int store_p)
+CORE_ADDR
+mips_linux_nat_target::register_u_offset (struct gdbarch *gdbarch,
+ int regno, int store_p)
{
if (mips_abi_regsize (gdbarch) == 8)
return mips64_linux_register_addr (gdbarch, regno, store_p);
return mips_linux_register_addr (gdbarch, regno, store_p);
}
-static const struct target_desc *
-mips_linux_read_description (struct target_ops *ops)
+const struct target_desc *
+mips_linux_nat_target::read_description ()
{
static int have_dsp = -1;
if (have_dsp < 0)
{
- int tid;
-
- tid = ptid_get_lwp (inferior_ptid);
- if (tid == 0)
- tid = ptid_get_pid (inferior_ptid);
+ int tid = get_ptrace_pid (inferior_ptid);
+ errno = 0;
ptrace (PTRACE_PEEKUSER, tid, DSP_CONTROL, 0);
switch (errno)
{
return have_dsp ? tdesc_mips64_dsp_linux : tdesc_mips64_linux;
}
-#ifndef PTRACE_GET_WATCH_REGS
-# define PTRACE_GET_WATCH_REGS 0xd0
-#endif
-
-#ifndef PTRACE_SET_WATCH_REGS
-# define PTRACE_SET_WATCH_REGS 0xd1
-#endif
-
-#define W_BIT 0
-#define R_BIT 1
-#define I_BIT 2
-
-#define W_MASK (1 << W_BIT)
-#define R_MASK (1 << R_BIT)
-#define I_MASK (1 << I_BIT)
-
-#define IRW_MASK (I_MASK | R_MASK | W_MASK)
-
-enum pt_watch_style {
- pt_watch_style_mips32,
- pt_watch_style_mips64
-};
-
-#define MAX_DEBUG_REGISTER 8
-
-/* A value of zero in a watchlo indicates that it is available. */
-
-struct mips32_watch_regs
-{
- uint32_t watchlo[MAX_DEBUG_REGISTER];
- /* Lower 16 bits of watchhi. */
- uint16_t watchhi[MAX_DEBUG_REGISTER];
- /* Valid mask and I R W bits.
- * bit 0 -- 1 if W bit is usable.
- * bit 1 -- 1 if R bit is usable.
- * bit 2 -- 1 if I bit is usable.
- * bits 3 - 11 -- Valid watchhi mask bits.
- */
- uint16_t watch_masks[MAX_DEBUG_REGISTER];
- /* The number of valid watch register pairs. */
- uint32_t num_valid;
- /* There is confusion across gcc versions about structure alignment,
- so we force 8 byte alignment for these structures so they match
- the kernel even if it was build with a different gcc version. */
-} __attribute__ ((aligned (8)));
-
-struct mips64_watch_regs
-{
- uint64_t watchlo[MAX_DEBUG_REGISTER];
- uint16_t watchhi[MAX_DEBUG_REGISTER];
- uint16_t watch_masks[MAX_DEBUG_REGISTER];
- uint32_t num_valid;
-} __attribute__ ((aligned (8)));
-
-struct pt_watch_regs
-{
- enum pt_watch_style style;
- union
- {
- struct mips32_watch_regs mips32;
- struct mips64_watch_regs mips64;
- };
-};
-
/* -1 if the kernel and/or CPU do not support watch registers.
1 if watch_readback is valid and we can read style, num_valid
and the masks.
static struct pt_watch_regs watch_readback;
-/* We keep list of all watchpoints we should install and calculate the
- watch register values each time the list changes. This allows for
- easy sharing of watch registers for more than one watchpoint. */
-
-struct mips_watchpoint
-{
- CORE_ADDR addr;
- int len;
- int type;
- struct mips_watchpoint *next;
-};
-
static struct mips_watchpoint *current_watches;
/* The current set of watch register values for writing the
static struct pt_watch_regs watch_mirror;
-/* Assuming usable watch registers, return the irw_mask. */
-
-static uint32_t
-get_irw_mask (struct pt_watch_regs *regs, int set)
-{
- switch (regs->style)
- {
- case pt_watch_style_mips32:
- return regs->mips32.watch_masks[set] & IRW_MASK;
- case pt_watch_style_mips64:
- return regs->mips64.watch_masks[set] & IRW_MASK;
- default:
- internal_error (__FILE__, __LINE__,
- _("Unrecognized watch register style"));
- }
-}
-
-/* Assuming usable watch registers, return the reg_mask. */
-
-static uint32_t
-get_reg_mask (struct pt_watch_regs *regs, int set)
-{
- switch (regs->style)
- {
- case pt_watch_style_mips32:
- return regs->mips32.watch_masks[set] & ~IRW_MASK;
- case pt_watch_style_mips64:
- return regs->mips64.watch_masks[set] & ~IRW_MASK;
- default:
- internal_error (__FILE__, __LINE__,
- _("Unrecognized watch register style"));
- }
-}
-
-/* Assuming usable watch registers, return the num_valid. */
-
-static uint32_t
-get_num_valid (struct pt_watch_regs *regs)
-{
- switch (regs->style)
- {
- case pt_watch_style_mips32:
- return regs->mips32.num_valid;
- case pt_watch_style_mips64:
- return regs->mips64.num_valid;
- default:
- internal_error (__FILE__, __LINE__,
- _("Unrecognized watch register style"));
- }
-}
-
-/* Assuming usable watch registers, return the watchlo. */
-
-static CORE_ADDR
-get_watchlo (struct pt_watch_regs *regs, int set)
-{
- switch (regs->style)
- {
- case pt_watch_style_mips32:
- return regs->mips32.watchlo[set];
- case pt_watch_style_mips64:
- return regs->mips64.watchlo[set];
- default:
- internal_error (__FILE__, __LINE__,
- _("Unrecognized watch register style"));
- }
-}
-
-/* Assuming usable watch registers, set a watchlo value. */
-
-static void
-set_watchlo (struct pt_watch_regs *regs, int set, CORE_ADDR value)
-{
- switch (regs->style)
- {
- case pt_watch_style_mips32:
- /* The cast will never throw away bits as 64 bit addresses can
- never be used on a 32 bit kernel. */
- regs->mips32.watchlo[set] = (uint32_t)value;
- break;
- case pt_watch_style_mips64:
- regs->mips64.watchlo[set] = value;
- break;
- default:
- internal_error (__FILE__, __LINE__,
- _("Unrecognized watch register style"));
- }
-}
-
-/* Assuming usable watch registers, return the watchhi. */
-
-static uint32_t
-get_watchhi (struct pt_watch_regs *regs, int n)
-{
- switch (regs->style)
- {
- case pt_watch_style_mips32:
- return regs->mips32.watchhi[n];
- case pt_watch_style_mips64:
- return regs->mips64.watchhi[n];
- default:
- internal_error (__FILE__, __LINE__,
- _("Unrecognized watch register style"));
- }
-}
-
-/* Assuming usable watch registers, set a watchhi value. */
-
-static void
-set_watchhi (struct pt_watch_regs *regs, int n, uint16_t value)
-{
- switch (regs->style)
- {
- case pt_watch_style_mips32:
- regs->mips32.watchhi[n] = value;
- break;
- case pt_watch_style_mips64:
- regs->mips64.watchhi[n] = value;
- break;
- default:
- internal_error (__FILE__, __LINE__,
- _("Unrecognized watch register style"));
- }
-}
-
static void
mips_show_dr (const char *func, CORE_ADDR addr,
int len, enum target_hw_bp_type type)
puts_unfiltered (func);
if (addr || len)
printf_unfiltered (" (addr=%s, len=%d, type=%s)",
- paddress (target_gdbarch, addr), len,
+ paddress (target_gdbarch (), addr), len,
type == hw_write ? "data-write"
: (type == hw_read ? "data-read"
: (type == hw_access ? "data-read/write"
for (i = 0; i < MAX_DEBUG_REGISTER; i++)
printf_unfiltered ("\tDR%d: lo=%s, hi=%s\n", i,
- paddress (target_gdbarch,
- get_watchlo (&watch_mirror, i)),
- paddress (target_gdbarch,
- get_watchhi (&watch_mirror, i)));
-}
-
-/* Return 1 if watch registers are usable. Cached information is used
- unless force is true. */
-
-static int
-mips_linux_read_watch_registers (int force)
-{
- int tid;
-
- if (force || watch_readback_valid == 0)
- {
- tid = ptid_get_lwp (inferior_ptid);
- if (ptrace (PTRACE_GET_WATCH_REGS, tid, &watch_readback) == -1)
- {
- watch_readback_valid = -1;
- return 0;
- }
- switch (watch_readback.style)
- {
- case pt_watch_style_mips32:
- if (watch_readback.mips32.num_valid == 0)
- {
- watch_readback_valid = -1;
- return 0;
- }
- break;
- case pt_watch_style_mips64:
- if (watch_readback.mips64.num_valid == 0)
- {
- watch_readback_valid = -1;
- return 0;
- }
- break;
- default:
- watch_readback_valid = -1;
- return 0;
- }
- /* Watch registers appear to be usable. */
- watch_readback_valid = 1;
- }
- return (watch_readback_valid == 1) ? 1 : 0;
-}
-
-/* Convert GDB's type to an IRW mask. */
-
-static unsigned
-type_to_irw (int type)
-{
- switch (type)
- {
- case hw_write:
- return W_MASK;
- case hw_read:
- return R_MASK;
- case hw_access:
- return (W_MASK | R_MASK);
- default:
- return 0;
- }
+ paddress (target_gdbarch (),
+ mips_linux_watch_get_watchlo (&watch_mirror,
+ i)),
+ paddress (target_gdbarch (),
+ mips_linux_watch_get_watchhi (&watch_mirror,
+ i)));
}
/* Target to_can_use_hw_breakpoint implementation. Return 1 if we can
handle the specified watch type. */
-static int
-mips_linux_can_use_hw_breakpoint (int type, int cnt, int ot)
+int
+mips_linux_nat_target::can_use_hw_breakpoint (enum bptype type,
+ int cnt, int ot)
{
int i;
uint32_t wanted_mask, irw_mask;
- if (!mips_linux_read_watch_registers (0))
+ if (!mips_linux_read_watch_registers (inferior_ptid.lwp (),
+ &watch_readback,
+ &watch_readback_valid, 0))
return 0;
switch (type)
return 0;
}
- for (i = 0; i < get_num_valid (&watch_readback) && cnt; i++)
+ for (i = 0;
+ i < mips_linux_watch_get_num_valid (&watch_readback) && cnt;
+ i++)
{
- irw_mask = get_irw_mask (&watch_readback, i);
+ irw_mask = mips_linux_watch_get_irw_mask (&watch_readback, i);
if ((irw_mask & wanted_mask) == wanted_mask)
cnt--;
}
stopped by watchpoint. The watchhi R and W bits indicate the watch
register triggered. */
-static int
-mips_linux_stopped_by_watchpoint (void)
+bool
+mips_linux_nat_target::stopped_by_watchpoint ()
{
int n;
int num_valid;
- if (!mips_linux_read_watch_registers (1))
- return 0;
+ if (!mips_linux_read_watch_registers (inferior_ptid.lwp (),
+ &watch_readback,
+ &watch_readback_valid, 1))
+ return false;
- num_valid = get_num_valid (&watch_readback);
+ num_valid = mips_linux_watch_get_num_valid (&watch_readback);
for (n = 0; n < MAX_DEBUG_REGISTER && n < num_valid; n++)
- if (get_watchhi (&watch_readback, n) & (R_MASK | W_MASK))
- return 1;
+ if (mips_linux_watch_get_watchhi (&watch_readback, n) & (R_MASK | W_MASK))
+ return true;
- return 0;
+ return false;
}
/* Target to_stopped_data_address implementation. Set the address
where the watch triggered (if known). Return 1 if the address was
known. */
-static int
-mips_linux_stopped_data_address (struct target_ops *t, CORE_ADDR *paddr)
+bool
+mips_linux_nat_target::stopped_data_address (CORE_ADDR *paddr)
{
/* On mips we don't know the low order 3 bits of the data address,
so we must return false. */
- return 0;
-}
-
-/* Set any low order bits in mask that are not set. */
-
-static CORE_ADDR
-fill_mask (CORE_ADDR mask)
-{
- CORE_ADDR f = 1;
- while (f && f < mask)
- {
- mask |= f;
- f <<= 1;
- }
- return mask;
-}
-
-/* Try to add a single watch to the specified registers. Return 1 on
- success, 0 on failure. */
-
-static int
-try_one_watch (struct pt_watch_regs *regs, CORE_ADDR addr,
- int len, unsigned irw)
-{
- CORE_ADDR base_addr, last_byte, break_addr, segment_len;
- CORE_ADDR mask_bits, t_low, t_low_end;
- uint16_t t_hi;
- int i, free_watches;
- struct pt_watch_regs regs_copy;
-
- if (len <= 0)
- return 0;
-
- last_byte = addr + len - 1;
- mask_bits = fill_mask (addr ^ last_byte) | IRW_MASK;
- base_addr = addr & ~mask_bits;
-
- /* Check to see if it is covered by current registers. */
- for (i = 0; i < get_num_valid (regs); i++)
- {
- t_low = get_watchlo (regs, i);
- if (t_low != 0 && irw == ((unsigned)t_low & irw))
- {
- t_hi = get_watchhi (regs, i) | IRW_MASK;
- t_low &= ~(CORE_ADDR)t_hi;
- if (addr >= t_low && last_byte <= (t_low + t_hi))
- return 1;
- }
- }
- /* Try to find an empty register. */
- free_watches = 0;
- for (i = 0; i < get_num_valid (regs); i++)
- {
- t_low = get_watchlo (regs, i);
- if (t_low == 0 && irw == (get_irw_mask (regs, i) & irw))
- {
- if (mask_bits <= (get_reg_mask (regs, i) | IRW_MASK))
- {
- /* It fits, we'll take it. */
- set_watchlo (regs, i, base_addr | irw);
- set_watchhi (regs, i, mask_bits & ~IRW_MASK);
- return 1;
- }
- else
- {
- /* It doesn't fit, but has the proper IRW capabilities. */
- free_watches++;
- }
- }
- }
- if (free_watches > 1)
- {
- /* Try to split it across several registers. */
- regs_copy = *regs;
- for (i = 0; i < get_num_valid (®s_copy); i++)
- {
- t_low = get_watchlo (®s_copy, i);
- t_hi = get_reg_mask (®s_copy, i) | IRW_MASK;
- if (t_low == 0 && irw == (t_hi & irw))
- {
- t_low = addr & ~(CORE_ADDR)t_hi;
- break_addr = t_low + t_hi + 1;
- if (break_addr >= addr + len)
- segment_len = len;
- else
- segment_len = break_addr - addr;
- mask_bits = fill_mask (addr ^ (addr + segment_len - 1));
- set_watchlo (®s_copy, i, (addr & ~mask_bits) | irw);
- set_watchhi (®s_copy, i, mask_bits & ~IRW_MASK);
- if (break_addr >= addr + len)
- {
- *regs = regs_copy;
- return 1;
- }
- len = addr + len - break_addr;
- addr = break_addr;
- }
- }
- }
- /* It didn't fit anywhere, we failed. */
- return 0;
+ return false;
}
/* Target to_region_ok_for_hw_watchpoint implementation. Return 1 if
the specified region can be covered by the watch registers. */
-static int
-mips_linux_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
+int
+mips_linux_nat_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
{
struct pt_watch_regs dummy_regs;
int i;
- if (!mips_linux_read_watch_registers (0))
+ if (!mips_linux_read_watch_registers (inferior_ptid.lwp (),
+ &watch_readback,
+ &watch_readback_valid, 0))
return 0;
dummy_regs = watch_readback;
/* Clear them out. */
- for (i = 0; i < get_num_valid (&dummy_regs); i++)
- set_watchlo (&dummy_regs, i, 0);
- return try_one_watch (&dummy_regs, addr, len, 0);
+ for (i = 0; i < mips_linux_watch_get_num_valid (&dummy_regs); i++)
+ mips_linux_watch_set_watchlo (&dummy_regs, i, 0);
+ return mips_linux_watch_try_one_watch (&dummy_regs, addr, len, 0);
}
-
/* Write the mirrored watch register values for each thread. */
static int
ALL_LWPS (lp)
{
- tid = ptid_get_lwp (lp->ptid);
- if (ptrace (PTRACE_SET_WATCH_REGS, tid, &watch_mirror) == -1)
+ tid = lp->ptid.lwp ();
+ if (ptrace (PTRACE_SET_WATCH_REGS, tid, &watch_mirror, NULL) == -1)
perror_with_name (_("Couldn't write debug register"));
}
return 0;
}
-/* linux_nat new_thread implementation. Write the mirrored watch
- register values for the new thread. */
+/* linux_nat_target::low_new_thread implementation. Write the
+ mirrored watch register values for the new thread. */
-static void
-mips_linux_new_thread (struct lwp_info *lp)
+void
+mips_linux_nat_target::low_new_thread (struct lwp_info *lp)
{
- int tid;
+ long tid = lp->ptid.lwp ();
- if (!mips_linux_read_watch_registers (0))
+ if (!mips_linux_read_watch_registers (tid,
+ &watch_readback,
+ &watch_readback_valid, 0))
return;
- tid = ptid_get_lwp (lp->ptid);
- if (ptrace (PTRACE_SET_WATCH_REGS, tid, &watch_mirror) == -1)
+ if (ptrace (PTRACE_SET_WATCH_REGS, tid, &watch_mirror, NULL) == -1)
perror_with_name (_("Couldn't write debug register"));
}
-/* Fill in the watch registers with the currently cached watches. */
-
-static void
-populate_regs_from_watches (struct pt_watch_regs *regs)
-{
- struct mips_watchpoint *w;
- int i;
-
- /* Clear them out. */
- for (i = 0; i < get_num_valid (regs); i++)
- {
- set_watchlo (regs, i, 0);
- set_watchhi (regs, i, 0);
- }
-
- w = current_watches;
- while (w)
- {
- i = try_one_watch (regs, w->addr, w->len, type_to_irw (w->type));
- /* They must all fit, because we previously calculated that they
- would. */
- gdb_assert (i);
- w = w->next;
- }
-}
-
/* Target to_insert_watchpoint implementation. Try to insert a new
watch. Return zero on success. */
-static int
-mips_linux_insert_watchpoint (CORE_ADDR addr, int len, int type,
- struct expression *cond)
+int
+mips_linux_nat_target::insert_watchpoint (CORE_ADDR addr, int len,
+ enum target_hw_bp_type type,
+ struct expression *cond)
{
struct pt_watch_regs regs;
struct mips_watchpoint *new_watch;
struct mips_watchpoint **pw;
- int i;
int retval;
- if (!mips_linux_read_watch_registers (0))
+ if (!mips_linux_read_watch_registers (inferior_ptid.lwp (),
+ &watch_readback,
+ &watch_readback_valid, 0))
return -1;
if (len <= 0)
regs = watch_readback;
/* Add the current watches. */
- populate_regs_from_watches (®s);
+ mips_linux_watch_populate_regs (current_watches, ®s);
/* Now try to add the new watch. */
- if (!try_one_watch (®s, addr, len, type_to_irw (type)))
+ if (!mips_linux_watch_try_one_watch (®s, addr, len,
+ mips_linux_watch_type_to_irw (type)))
return -1;
/* It fit. Stick it on the end of the list. */
- new_watch = (struct mips_watchpoint *)
- xmalloc (sizeof (struct mips_watchpoint));
+ new_watch = XNEW (struct mips_watchpoint);
new_watch->addr = addr;
new_watch->len = len;
new_watch->type = type;
watch_mirror = regs;
retval = write_watchpoint_regs ();
- if (maint_show_dr)
+ if (show_debug_regs)
mips_show_dr ("insert_watchpoint", addr, len, type);
return retval;
/* Target to_remove_watchpoint implementation. Try to remove a watch.
Return zero on success. */
-static int
-mips_linux_remove_watchpoint (CORE_ADDR addr, int len, int type,
- struct expression *cond)
+int
+mips_linux_nat_target::remove_watchpoint (CORE_ADDR addr, int len,
+ enum target_hw_bp_type type,
+ struct expression *cond)
{
int retval;
int deleted_one;
gdb_assert (watch_readback_valid == 1);
watch_mirror = watch_readback;
- populate_regs_from_watches (&watch_mirror);
+ mips_linux_watch_populate_regs (current_watches, &watch_mirror);
retval = write_watchpoint_regs ();
- if (maint_show_dr)
+ if (show_debug_regs)
mips_show_dr ("remove_watchpoint", addr, len, type);
return retval;
/* Target to_close implementation. Free any watches and call the
super implementation. */
-static void
-mips_linux_close (int quitting)
+void
+mips_linux_nat_target::close ()
{
struct mips_watchpoint *w;
struct mips_watchpoint *nw;
}
current_watches = NULL;
- if (super_close)
- super_close (quitting);
+ linux_nat_trad_target::close ();
}
-void _initialize_mips_linux_nat (void);
-
+void _initialize_mips_linux_nat ();
void
-_initialize_mips_linux_nat (void)
+_initialize_mips_linux_nat ()
{
- struct target_ops *t;
-
add_setshow_boolean_cmd ("show-debug-regs", class_maintenance,
- &maint_show_dr, _("\
+ &show_debug_regs, _("\
Set whether to show variables that mirror the mips debug registers."), _("\
Show whether to show variables that mirror the mips debug registers."), _("\
Use \"on\" to enable, \"off\" to disable.\n\
&maintenance_set_cmdlist,
&maintenance_show_cmdlist);
- t = linux_trad_target (mips_linux_register_u_offset);
-
- super_close = t->to_close;
- t->to_close = mips_linux_close;
-
- super_fetch_registers = t->to_fetch_registers;
- super_store_registers = t->to_store_registers;
-
- t->to_fetch_registers = mips64_linux_fetch_registers;
- t->to_store_registers = mips64_linux_store_registers;
-
- t->to_can_use_hw_breakpoint = mips_linux_can_use_hw_breakpoint;
- t->to_remove_watchpoint = mips_linux_remove_watchpoint;
- t->to_insert_watchpoint = mips_linux_insert_watchpoint;
- t->to_stopped_by_watchpoint = mips_linux_stopped_by_watchpoint;
- t->to_stopped_data_address = mips_linux_stopped_data_address;
- t->to_region_ok_for_hw_watchpoint = mips_linux_region_ok_for_hw_watchpoint;
-
- t->to_read_description = mips_linux_read_description;
-
- linux_nat_add_target (t);
- linux_nat_set_new_thread (t, mips_linux_new_thread);
-
- /* Initialize the standard target descriptions. */
- initialize_tdesc_mips_linux ();
- initialize_tdesc_mips_dsp_linux ();
- initialize_tdesc_mips64_linux ();
- initialize_tdesc_mips64_dsp_linux ();
+ linux_target = &the_mips_linux_nat_target;
+ add_inf_child_target (&the_mips_linux_nat_target);
}
projects / thirdparty / binutils-gdb.git / blobdiff