/* GNU/Linux/MIPS specific low level interface, for the remote server for GDB.
- Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2005, 2006, 2007,
- 2008, 2009, 2010 Free Software Foundation, Inc.
+ Copyright (C) 1995-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "server.h"
#include "linux-low.h"
-#include <sys/ptrace.h>
+#include "nat/gdb_ptrace.h"
#include <endian.h>
+#include "nat/mips-linux-watch.h"
#include "gdb_proc_service.h"
/* Defined in auto-generated file mips-linux.c. */
void init_registers_mips_linux (void);
+extern const struct target_desc *tdesc_mips_linux;
+
+/* Defined in auto-generated file mips-dsp-linux.c. */
+void init_registers_mips_dsp_linux (void);
+extern const struct target_desc *tdesc_mips_dsp_linux;
+
/* Defined in auto-generated file mips64-linux.c. */
void init_registers_mips64_linux (void);
+extern const struct target_desc *tdesc_mips64_linux;
+
+/* Defined in auto-generated file mips64-dsp-linux.c. */
+void init_registers_mips64_dsp_linux (void);
+extern const struct target_desc *tdesc_mips64_dsp_linux;
+
+#ifdef __mips64
+#define tdesc_mips_linux tdesc_mips64_linux
+#define tdesc_mips_dsp_linux tdesc_mips64_dsp_linux
+#endif
#ifndef PTRACE_GET_THREAD_AREA
#define PTRACE_GET_THREAD_AREA 25
#endif
#define mips_num_regs 73
+#define mips_dsp_num_regs 80
#include <asm/ptrace.h>
+#ifndef DSP_BASE
+#define DSP_BASE 71
+#define DSP_CONTROL 77
+#endif
+
union mips_register
{
unsigned char buf[8];
/* Return the ptrace ``address'' of register REGNO. */
-static int mips_regmap[] = {
- -1, 1, 2, 3, 4, 5, 6, 7,
- 8, 9, 10, 11, 12, 13, 14, 15,
- 16, 17, 18, 19, 20, 21, 22, 23,
- 24, 25, 26, 27, 28, 29, 30, 31,
+#define mips_base_regs \
+ -1, 1, 2, 3, 4, 5, 6, 7, \
+ 8, 9, 10, 11, 12, 13, 14, 15, \
+ 16, 17, 18, 19, 20, 21, 22, 23, \
+ 24, 25, 26, 27, 28, 29, 30, 31, \
+ \
+ -1, MMLO, MMHI, BADVADDR, CAUSE, PC, \
+ \
+ FPR_BASE, FPR_BASE + 1, FPR_BASE + 2, FPR_BASE + 3, \
+ FPR_BASE + 4, FPR_BASE + 5, FPR_BASE + 6, FPR_BASE + 7, \
+ FPR_BASE + 8, FPR_BASE + 9, FPR_BASE + 10, FPR_BASE + 11, \
+ FPR_BASE + 12, FPR_BASE + 13, FPR_BASE + 14, FPR_BASE + 15, \
+ FPR_BASE + 16, FPR_BASE + 17, FPR_BASE + 18, FPR_BASE + 19, \
+ FPR_BASE + 20, FPR_BASE + 21, FPR_BASE + 22, FPR_BASE + 23, \
+ FPR_BASE + 24, FPR_BASE + 25, FPR_BASE + 26, FPR_BASE + 27, \
+ FPR_BASE + 28, FPR_BASE + 29, FPR_BASE + 30, FPR_BASE + 31, \
+ FPC_CSR, FPC_EIR
+
+#define mips_dsp_regs \
+ DSP_BASE, DSP_BASE + 1, DSP_BASE + 2, DSP_BASE + 3, \
+ DSP_BASE + 4, DSP_BASE + 5, \
+ DSP_CONTROL
+
+static int mips_regmap[mips_num_regs] = {
+ mips_base_regs,
+ 0
+};
- -1, MMLO, MMHI, BADVADDR, CAUSE, PC,
+static int mips_dsp_regmap[mips_dsp_num_regs] = {
+ mips_base_regs,
+ mips_dsp_regs,
+ 0
+};
- FPR_BASE, FPR_BASE + 1, FPR_BASE + 2, FPR_BASE + 3,
- FPR_BASE + 4, FPR_BASE + 5, FPR_BASE + 6, FPR_BASE + 7,
- FPR_BASE + 8, FPR_BASE + 8, FPR_BASE + 10, FPR_BASE + 11,
- FPR_BASE + 12, FPR_BASE + 13, FPR_BASE + 14, FPR_BASE + 15,
- FPR_BASE + 16, FPR_BASE + 17, FPR_BASE + 18, FPR_BASE + 19,
- FPR_BASE + 20, FPR_BASE + 21, FPR_BASE + 22, FPR_BASE + 23,
- FPR_BASE + 24, FPR_BASE + 25, FPR_BASE + 26, FPR_BASE + 27,
- FPR_BASE + 28, FPR_BASE + 29, FPR_BASE + 30, FPR_BASE + 31,
- FPC_CSR, FPC_EIR,
+/* DSP registers are not in any regset and can only be accessed
+ individually. */
- 0
+static unsigned char mips_dsp_regset_bitmap[(mips_dsp_num_regs + 7) / 8] = {
+ 0xfe, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, 0xff, 0x80
+};
+
+static int have_dsp = -1;
+
+/* Try peeking at an arbitrarily chosen DSP register and pick the available
+ user register set accordingly. */
+
+static const struct target_desc *
+mips_read_description (void)
+{
+ if (have_dsp < 0)
+ {
+ int pid = lwpid_of (current_thread);
+
+ errno = 0;
+ ptrace (PTRACE_PEEKUSER, pid, DSP_CONTROL, 0);
+ switch (errno)
+ {
+ case 0:
+ have_dsp = 1;
+ break;
+ case EIO:
+ have_dsp = 0;
+ break;
+ default:
+ perror_with_name ("ptrace");
+ break;
+ }
+ }
+
+ return have_dsp ? tdesc_mips_dsp_linux : tdesc_mips_linux;
+}
+
+static void
+mips_arch_setup (void)
+{
+ current_process ()->tdesc = mips_read_description ();
+}
+
+static struct usrregs_info *
+get_usrregs_info (void)
+{
+ const struct regs_info *regs_info = the_low_target.regs_info ();
+
+ return regs_info->usrregs;
+}
+
+/* Per-process arch-specific data we want to keep. */
+
+struct arch_process_info
+{
+ /* -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.
+ 0 if we need to read the watch_readback. */
+
+ int watch_readback_valid;
+
+ /* Cached watch register read values. */
+
+ struct pt_watch_regs watch_readback;
+
+ /* Current watchpoint requests for this process. */
+
+ struct mips_watchpoint *current_watches;
+
+ /* The current set of watch register values for writing the
+ registers. */
+
+ struct pt_watch_regs watch_mirror;
+};
+
+/* 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. */
+ int watch_registers_changed;
};
/* From mips-linux-nat.c. */
/* Pseudo registers can not be read. ptrace does not provide a way to
read (or set) PS_REGNUM, and there's no point in reading or setting
- ZERO_REGNUM. We also can not set BADVADDR, CAUSE, or FCRIR via
- ptrace(). */
+ ZERO_REGNUM, it's always 0. We also can not set BADVADDR, CAUSE,
+ or FCRIR via ptrace(). */
static int
mips_cannot_fetch_register (int regno)
{
- if (mips_regmap[regno] == -1)
+ const struct target_desc *tdesc;
+
+ if (get_usrregs_info ()->regmap[regno] == -1)
return 1;
- if (find_regno ("r0") == regno)
+ tdesc = current_process ()->tdesc;
+
+ /* On n32 we can't access 64-bit registers via PTRACE_PEEKUSR. */
+ if (register_size (tdesc, regno) > sizeof (PTRACE_XFER_TYPE))
+ return 1;
+
+ if (find_regno (tdesc, "r0") == regno)
return 1;
return 0;
static int
mips_cannot_store_register (int regno)
{
- if (mips_regmap[regno] == -1)
+ const struct target_desc *tdesc;
+
+ if (get_usrregs_info ()->regmap[regno] == -1)
+ return 1;
+
+ tdesc = current_process ()->tdesc;
+
+ /* On n32 we can't access 64-bit registers via PTRACE_POKEUSR. */
+ if (register_size (tdesc, regno) > sizeof (PTRACE_XFER_TYPE))
return 1;
- if (find_regno ("r0") == regno)
+ if (find_regno (tdesc, "r0") == regno)
return 1;
- if (find_regno ("cause") == regno)
+ if (find_regno (tdesc, "cause") == regno)
return 1;
- if (find_regno ("badvaddr") == regno)
+ if (find_regno (tdesc, "badvaddr") == regno)
return 1;
- if (find_regno ("fir") == regno)
+ if (find_regno (tdesc, "fir") == regno)
return 1;
return 0;
}
+static int
+mips_fetch_register (struct regcache *regcache, int regno)
+{
+ const struct target_desc *tdesc = current_process ()->tdesc;
+
+ if (find_regno (tdesc, "r0") == regno)
+ {
+ supply_register_zeroed (regcache, regno);
+ return 1;
+ }
+
+ return 0;
+}
+
static CORE_ADDR
mips_get_pc (struct regcache *regcache)
{
union mips_register pc;
collect_register_by_name (regcache, "pc", pc.buf);
- return register_size (0) == 4 ? pc.reg32 : pc.reg64;
+ return register_size (regcache->tdesc, 0) == 4 ? pc.reg32 : pc.reg64;
}
static void
mips_set_pc (struct regcache *regcache, CORE_ADDR pc)
{
union mips_register newpc;
- if (register_size (0) == 4)
+ if (register_size (regcache->tdesc, 0) == 4)
newpc.reg32 = pc;
else
newpc.reg64 = pc;
static const unsigned int mips_breakpoint = 0x0005000d;
#define mips_breakpoint_len 4
-/* We only place breakpoints in empty marker functions, and thread locking
- is outside of the function. So rather than importing software single-step,
- we can just run until exit. */
-static CORE_ADDR
-mips_reinsert_addr (void)
+/* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
+
+static const gdb_byte *
+mips_sw_breakpoint_from_kind (int kind, int *size)
{
- struct regcache *regcache = get_thread_regcache (current_inferior, 1);
- union mips_register ra;
- collect_register_by_name (regcache, "r31", ra.buf);
- return register_size (0) == 4 ? ra.reg32 : ra.reg64;
+ *size = mips_breakpoint_len;
+ return (const gdb_byte *) &mips_breakpoint;
}
static int
return 0;
}
+/* Mark the watch registers of lwp, represented by ENTRY, as changed. */
+
+static void
+update_watch_registers_callback (thread_info *thread)
+{
+ struct lwp_info *lwp = get_thread_lwp (thread);
+
+ /* The actual update is done later just before resuming the lwp,
+ we just mark that the registers need updating. */
+ lwp->arch_private->watch_registers_changed = 1;
+
+ /* If the lwp isn't stopped, force it to momentarily pause, so
+ we can update its watch registers. */
+ if (!lwp->stopped)
+ linux_stop_lwp (lwp);
+}
+
+/* This is the implementation of linux_target_ops method
+ new_process. */
+
+static struct arch_process_info *
+mips_linux_new_process (void)
+{
+ struct arch_process_info *info = XCNEW (struct arch_process_info);
+
+ return info;
+}
+
+/* This is the implementation of linux_target_ops method
+ delete_process. */
+
+static void
+mips_linux_delete_process (struct arch_process_info *info)
+{
+ xfree (info);
+}
+
+/* This is the implementation of linux_target_ops method new_thread.
+ Mark the watch registers as changed, so the threads' copies will
+ be updated. */
+
+static void
+mips_linux_new_thread (struct lwp_info *lwp)
+{
+ struct arch_lwp_info *info = XCNEW (struct arch_lwp_info);
+
+ info->watch_registers_changed = 1;
+
+ lwp->arch_private = info;
+}
+
+/* Function to call when a thread is being deleted. */
+
+static void
+mips_linux_delete_thread (struct arch_lwp_info *arch_lwp)
+{
+ xfree (arch_lwp);
+}
+
+/* Create a new mips_watchpoint and add it to the list. */
+
+static void
+mips_add_watchpoint (struct arch_process_info *priv, CORE_ADDR addr, int len,
+ enum target_hw_bp_type watch_type)
+{
+ struct mips_watchpoint *new_watch;
+ struct mips_watchpoint **pw;
+
+ new_watch = XNEW (struct mips_watchpoint);
+ new_watch->addr = addr;
+ new_watch->len = len;
+ new_watch->type = watch_type;
+ new_watch->next = NULL;
+
+ pw = &priv->current_watches;
+ while (*pw != NULL)
+ pw = &(*pw)->next;
+ *pw = new_watch;
+}
+
+/* Hook to call when a new fork is attached. */
+
+static void
+mips_linux_new_fork (struct process_info *parent,
+ struct process_info *child)
+{
+ struct arch_process_info *parent_private;
+ struct arch_process_info *child_private;
+ struct mips_watchpoint *wp;
+
+ /* These are allocated by linux_add_process. */
+ gdb_assert (parent->priv != NULL
+ && parent->priv->arch_private != NULL);
+ gdb_assert (child->priv != NULL
+ && child->priv->arch_private != NULL);
+
+ /* Linux kernel before 2.6.33 commit
+ 72f674d203cd230426437cdcf7dd6f681dad8b0d
+ will inherit hardware debug registers from parent
+ on fork/vfork/clone. Newer Linux kernels create such tasks with
+ zeroed debug 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. The debug registers mirror will become zeroed
+ in the end before detaching the forked off process, thus making
+ this compatible with older Linux kernels too. */
+
+ parent_private = parent->priv->arch_private;
+ child_private = child->priv->arch_private;
+
+ child_private->watch_readback_valid = parent_private->watch_readback_valid;
+ child_private->watch_readback = parent_private->watch_readback;
+
+ for (wp = parent_private->current_watches; wp != NULL; wp = wp->next)
+ mips_add_watchpoint (child_private, wp->addr, wp->len, wp->type);
+
+ child_private->watch_mirror = parent_private->watch_mirror;
+}
+/* This is the implementation of linux_target_ops method
+ prepare_to_resume. If the watch regs have changed, update the
+ thread's copies. */
+
+static void
+mips_linux_prepare_to_resume (struct lwp_info *lwp)
+{
+ ptid_t ptid = ptid_of (get_lwp_thread (lwp));
+ struct process_info *proc = find_process_pid (ptid.pid ());
+ struct arch_process_info *priv = proc->priv->arch_private;
+
+ if (lwp->arch_private->watch_registers_changed)
+ {
+ /* Only update the watch registers if we have set or unset a
+ watchpoint already. */
+ if (mips_linux_watch_get_num_valid (&priv->watch_mirror) > 0)
+ {
+ /* Write the mirrored watch register values. */
+ int tid = ptid.lwp ();
+
+ if (-1 == ptrace (PTRACE_SET_WATCH_REGS, tid,
+ &priv->watch_mirror, NULL))
+ perror_with_name ("Couldn't write watch register");
+ }
+
+ lwp->arch_private->watch_registers_changed = 0;
+ }
+}
+
+static int
+mips_supports_z_point_type (char z_type)
+{
+ switch (z_type)
+ {
+ case Z_PACKET_WRITE_WP:
+ case Z_PACKET_READ_WP:
+ case Z_PACKET_ACCESS_WP:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+/* This is the implementation of linux_target_ops method
+ insert_point. */
+
+static int
+mips_insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
+ int len, struct raw_breakpoint *bp)
+{
+ struct process_info *proc = current_process ();
+ struct arch_process_info *priv = proc->priv->arch_private;
+ struct pt_watch_regs regs;
+ long lwpid;
+ enum target_hw_bp_type watch_type;
+ uint32_t irw;
+
+ lwpid = lwpid_of (current_thread);
+ if (!mips_linux_read_watch_registers (lwpid,
+ &priv->watch_readback,
+ &priv->watch_readback_valid,
+ 0))
+ return -1;
+
+ if (len <= 0)
+ return -1;
+
+ regs = priv->watch_readback;
+ /* Add the current watches. */
+ mips_linux_watch_populate_regs (priv->current_watches, ®s);
+
+ /* Now try to add the new watch. */
+ watch_type = raw_bkpt_type_to_target_hw_bp_type (type);
+ irw = mips_linux_watch_type_to_irw (watch_type);
+ if (!mips_linux_watch_try_one_watch (®s, addr, len, irw))
+ return -1;
+
+ /* It fit. Stick it on the end of the list. */
+ mips_add_watchpoint (priv, addr, len, watch_type);
+
+ priv->watch_mirror = regs;
+
+ /* Only update the threads of this process. */
+ for_each_thread (proc->pid, update_watch_registers_callback);
+
+ return 0;
+}
+
+/* This is the implementation of linux_target_ops method
+ remove_point. */
+
+static int
+mips_remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
+ int len, struct raw_breakpoint *bp)
+{
+ struct process_info *proc = current_process ();
+ struct arch_process_info *priv = proc->priv->arch_private;
+
+ int deleted_one;
+ enum target_hw_bp_type watch_type;
+
+ struct mips_watchpoint **pw;
+ struct mips_watchpoint *w;
+
+ /* Search for a known watch that matches. Then unlink and free it. */
+ watch_type = raw_bkpt_type_to_target_hw_bp_type (type);
+ deleted_one = 0;
+ pw = &priv->current_watches;
+ while ((w = *pw))
+ {
+ if (w->addr == addr && w->len == len && w->type == watch_type)
+ {
+ *pw = w->next;
+ free (w);
+ deleted_one = 1;
+ break;
+ }
+ pw = &(w->next);
+ }
+
+ if (!deleted_one)
+ return -1; /* We don't know about it, fail doing nothing. */
+
+ /* At this point watch_readback is known to be valid because we
+ could not have added the watch without reading it. */
+ gdb_assert (priv->watch_readback_valid == 1);
+
+ priv->watch_mirror = priv->watch_readback;
+ mips_linux_watch_populate_regs (priv->current_watches,
+ &priv->watch_mirror);
+
+ /* Only update the threads of this process. */
+ for_each_thread (proc->pid, update_watch_registers_callback);
+
+ return 0;
+}
+
+/* This is the implementation of linux_target_ops method
+ stopped_by_watchpoint. The watchhi R and W bits indicate
+ the watch register triggered. */
+
+static int
+mips_stopped_by_watchpoint (void)
+{
+ struct process_info *proc = current_process ();
+ struct arch_process_info *priv = proc->priv->arch_private;
+ int n;
+ int num_valid;
+ long lwpid = lwpid_of (current_thread);
+
+ if (!mips_linux_read_watch_registers (lwpid,
+ &priv->watch_readback,
+ &priv->watch_readback_valid,
+ 1))
+ return 0;
+
+ num_valid = mips_linux_watch_get_num_valid (&priv->watch_readback);
+
+ for (n = 0; n < MAX_DEBUG_REGISTER && n < num_valid; n++)
+ if (mips_linux_watch_get_watchhi (&priv->watch_readback, n)
+ & (R_MASK | W_MASK))
+ return 1;
+
+ return 0;
+}
+
+/* This is the implementation of linux_target_ops method
+ stopped_data_address. */
+
+static CORE_ADDR
+mips_stopped_data_address (void)
+{
+ struct process_info *proc = current_process ();
+ struct arch_process_info *priv = proc->priv->arch_private;
+ int n;
+ int num_valid;
+ long lwpid = lwpid_of (current_thread);
+
+ /* On MIPS we don't know the low order 3 bits of the data address.
+ GDB does not support remote targets that can't report the
+ watchpoint address. So, make our best guess; return the starting
+ address of a watchpoint request which overlaps the one that
+ triggered. */
+
+ if (!mips_linux_read_watch_registers (lwpid,
+ &priv->watch_readback,
+ &priv->watch_readback_valid,
+ 0))
+ return 0;
+
+ num_valid = mips_linux_watch_get_num_valid (&priv->watch_readback);
+
+ for (n = 0; n < MAX_DEBUG_REGISTER && n < num_valid; n++)
+ if (mips_linux_watch_get_watchhi (&priv->watch_readback, n)
+ & (R_MASK | W_MASK))
+ {
+ CORE_ADDR t_low, t_hi;
+ int t_irw;
+ struct mips_watchpoint *watch;
+
+ t_low = mips_linux_watch_get_watchlo (&priv->watch_readback, n);
+ t_irw = t_low & IRW_MASK;
+ t_hi = (mips_linux_watch_get_watchhi (&priv->watch_readback, n)
+ | IRW_MASK);
+ t_low &= ~(CORE_ADDR)t_hi;
+
+ for (watch = priv->current_watches;
+ watch != NULL;
+ watch = watch->next)
+ {
+ CORE_ADDR addr = watch->addr;
+ CORE_ADDR last_byte = addr + watch->len - 1;
+
+ if ((t_irw & mips_linux_watch_type_to_irw (watch->type)) == 0)
+ {
+ /* Different type. */
+ continue;
+ }
+ /* Check for overlap of even a single byte. */
+ if (last_byte >= t_low && addr <= t_low + t_hi)
+ return addr;
+ }
+ }
+
+ /* Shouldn't happen. */
+ return 0;
+}
+
/* 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)
return PS_OK;
}
-#ifdef HAVE_PTRACE_GETREGS
-
static void
mips_collect_register (struct regcache *regcache,
int use_64bit, int regno, union mips_register *reg)
supply_register (regcache, regno, reg->buf + offset);
}
+#ifdef HAVE_PTRACE_GETREGS
+
static void
mips_collect_register_32bit (struct regcache *regcache,
int use_64bit, int regno, unsigned char *buf)
static void
mips_fill_gregset (struct regcache *regcache, void *buf)
{
- union mips_register *regset = buf;
+ union mips_register *regset = (union mips_register *) buf;
int i, use_64bit;
+ const struct target_desc *tdesc = regcache->tdesc;
- use_64bit = (register_size (0) == 8);
+ use_64bit = (register_size (tdesc, 0) == 8);
for (i = 1; i < 32; i++)
mips_collect_register (regcache, use_64bit, i, regset + i);
mips_collect_register (regcache, use_64bit,
- find_regno ("lo"), regset + 32);
+ find_regno (tdesc, "lo"), regset + 32);
mips_collect_register (regcache, use_64bit,
- find_regno ("hi"), regset + 33);
+ find_regno (tdesc, "hi"), regset + 33);
mips_collect_register (regcache, use_64bit,
- find_regno ("pc"), regset + 34);
+ find_regno (tdesc, "pc"), regset + 34);
mips_collect_register (regcache, use_64bit,
- find_regno ("badvaddr"), regset + 35);
+ find_regno (tdesc, "badvaddr"), regset + 35);
mips_collect_register (regcache, use_64bit,
- find_regno ("status"), regset + 36);
+ find_regno (tdesc, "status"), regset + 36);
mips_collect_register (regcache, use_64bit,
- find_regno ("cause"), regset + 37);
+ find_regno (tdesc, "cause"), regset + 37);
mips_collect_register (regcache, use_64bit,
- find_regno ("restart"), regset + 0);
+ find_regno (tdesc, "restart"), regset + 0);
}
static void
mips_store_gregset (struct regcache *regcache, const void *buf)
{
- const union mips_register *regset = buf;
+ const union mips_register *regset = (const union mips_register *) buf;
int i, use_64bit;
- use_64bit = (register_size (0) == 8);
+ use_64bit = (register_size (regcache->tdesc, 0) == 8);
- for (i = 0; i < 32; i++)
+ supply_register_by_name_zeroed (regcache, "r0");
+
+ for (i = 1; i < 32; i++)
mips_supply_register (regcache, use_64bit, i, regset + i);
- mips_supply_register (regcache, use_64bit, find_regno ("lo"), regset + 32);
- mips_supply_register (regcache, use_64bit, find_regno ("hi"), regset + 33);
- mips_supply_register (regcache, use_64bit, find_regno ("pc"), regset + 34);
mips_supply_register (regcache, use_64bit,
- find_regno ("badvaddr"), regset + 35);
+ find_regno (regcache->tdesc, "lo"), regset + 32);
+ mips_supply_register (regcache, use_64bit,
+ find_regno (regcache->tdesc, "hi"), regset + 33);
mips_supply_register (regcache, use_64bit,
- find_regno ("status"), regset + 36);
+ find_regno (regcache->tdesc, "pc"), regset + 34);
mips_supply_register (regcache, use_64bit,
- find_regno ("cause"), regset + 37);
+ find_regno (regcache->tdesc, "badvaddr"), regset + 35);
+ mips_supply_register (regcache, use_64bit,
+ find_regno (regcache->tdesc, "status"), regset + 36);
+ mips_supply_register (regcache, use_64bit,
+ find_regno (regcache->tdesc, "cause"), regset + 37);
mips_supply_register (regcache, use_64bit,
- find_regno ("restart"), regset + 0);
+ find_regno (regcache->tdesc, "restart"), regset + 0);
}
static void
mips_fill_fpregset (struct regcache *regcache, void *buf)
{
- union mips_register *regset = buf;
+ union mips_register *regset = (union mips_register *) buf;
int i, use_64bit, first_fp, big_endian;
- use_64bit = (register_size (0) == 8);
- first_fp = find_regno ("f0");
+ use_64bit = (register_size (regcache->tdesc, 0) == 8);
+ first_fp = find_regno (regcache->tdesc, "f0");
big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
/* See GDB for a discussion of this peculiar layout. */
regset[i & ~1].buf + 4 * (big_endian != (i & 1)));
mips_collect_register_32bit (regcache, use_64bit,
- find_regno ("fcsr"), regset[32].buf);
- mips_collect_register_32bit (regcache, use_64bit, find_regno ("fir"),
+ find_regno (regcache->tdesc, "fcsr"), regset[32].buf);
+ mips_collect_register_32bit (regcache, use_64bit,
+ find_regno (regcache->tdesc, "fir"),
regset[32].buf + 4);
}
static void
mips_store_fpregset (struct regcache *regcache, const void *buf)
{
- const union mips_register *regset = buf;
+ const union mips_register *regset = (const union mips_register *) buf;
int i, use_64bit, first_fp, big_endian;
- use_64bit = (register_size (0) == 8);
- first_fp = find_regno ("f0");
+ use_64bit = (register_size (regcache->tdesc, 0) == 8);
+ first_fp = find_regno (regcache->tdesc, "f0");
big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
/* See GDB for a discussion of this peculiar layout. */
regset[i & ~1].buf + 4 * (big_endian != (i & 1)));
mips_supply_register_32bit (regcache, use_64bit,
- find_regno ("fcsr"), regset[32].buf);
- mips_supply_register_32bit (regcache, use_64bit, find_regno ("fir"),
+ find_regno (regcache->tdesc, "fcsr"),
+ regset[32].buf);
+ mips_supply_register_32bit (regcache, use_64bit,
+ find_regno (regcache->tdesc, "fir"),
regset[32].buf + 4);
}
#endif /* HAVE_PTRACE_GETREGS */
-struct regset_info target_regsets[] = {
+/* Take care of 32-bit registers with 64-bit ptrace, POKEUSER side. */
+
+static void
+mips_collect_ptrace_register (struct regcache *regcache,
+ int regno, char *buf)
+{
+ int use_64bit = sizeof (PTRACE_XFER_TYPE) == 8;
+
+ if (use_64bit && register_size (regcache->tdesc, regno) == 4)
+ {
+ union mips_register reg;
+
+ mips_collect_register (regcache, 0, regno, ®);
+ memcpy (buf, ®, sizeof (reg));
+ }
+ else
+ collect_register (regcache, regno, buf);
+}
+
+/* Take care of 32-bit registers with 64-bit ptrace, PEEKUSER side. */
+
+static void
+mips_supply_ptrace_register (struct regcache *regcache,
+ int regno, const char *buf)
+{
+ int use_64bit = sizeof (PTRACE_XFER_TYPE) == 8;
+
+ if (use_64bit && register_size (regcache->tdesc, regno) == 4)
+ {
+ union mips_register reg;
+
+ memcpy (®, buf, sizeof (reg));
+ mips_supply_register (regcache, 0, regno, ®);
+ }
+ else
+ supply_register (regcache, regno, buf);
+}
+
+static struct regset_info mips_regsets[] = {
#ifdef HAVE_PTRACE_GETREGS
{ PTRACE_GETREGS, PTRACE_SETREGS, 0, 38 * 8, GENERAL_REGS,
mips_fill_gregset, mips_store_gregset },
{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, 0, 33 * 8, FP_REGS,
mips_fill_fpregset, mips_store_fpregset },
#endif /* HAVE_PTRACE_GETREGS */
- { 0, 0, 0, -1, -1, NULL, NULL }
+ NULL_REGSET
};
+static struct regsets_info mips_regsets_info =
+ {
+ mips_regsets, /* regsets */
+ 0, /* num_regsets */
+ NULL, /* disabled_regsets */
+ };
+
+static struct usrregs_info mips_dsp_usrregs_info =
+ {
+ mips_dsp_num_regs,
+ mips_dsp_regmap,
+ };
+
+static struct usrregs_info mips_usrregs_info =
+ {
+ mips_num_regs,
+ mips_regmap,
+ };
+
+static struct regs_info dsp_regs_info =
+ {
+ mips_dsp_regset_bitmap,
+ &mips_dsp_usrregs_info,
+ &mips_regsets_info
+ };
+
+static struct regs_info regs_info =
+ {
+ NULL, /* regset_bitmap */
+ &mips_usrregs_info,
+ &mips_regsets_info
+ };
+
+static const struct regs_info *
+mips_regs_info (void)
+{
+ if (have_dsp)
+ return &dsp_regs_info;
+ else
+ return ®s_info;
+}
+
struct linux_target_ops the_low_target = {
-#ifdef __mips64
- init_registers_mips64_linux,
-#else
- init_registers_mips_linux,
-#endif
- mips_num_regs,
- mips_regmap,
+ mips_arch_setup,
+ mips_regs_info,
mips_cannot_fetch_register,
mips_cannot_store_register,
+ mips_fetch_register,
mips_get_pc,
mips_set_pc,
- (const unsigned char *) &mips_breakpoint,
- mips_breakpoint_len,
- mips_reinsert_addr,
+ NULL, /* breakpoint_kind_from_pc */
+ mips_sw_breakpoint_from_kind,
+ NULL, /* get_next_pcs */
0,
mips_breakpoint_at,
+ mips_supports_z_point_type,
+ mips_insert_point,
+ mips_remove_point,
+ mips_stopped_by_watchpoint,
+ mips_stopped_data_address,
+ mips_collect_ptrace_register,
+ mips_supply_ptrace_register,
+ NULL, /* siginfo_fixup */
+ mips_linux_new_process,
+ mips_linux_delete_process,
+ mips_linux_new_thread,
+ mips_linux_delete_thread,
+ mips_linux_new_fork,
+ mips_linux_prepare_to_resume
};
+
+void
+initialize_low_arch (void)
+{
+ /* Initialize the Linux target descriptions. */
+ init_registers_mips_linux ();
+ init_registers_mips_dsp_linux ();
+ init_registers_mips64_linux ();
+ init_registers_mips64_dsp_linux ();
+
+ initialize_regsets_info (&mips_regsets_info);
+}
projects / deliverable / binutils-gdb.git / blobdiff