/* GNU/Linux on ARM native support.
- Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2006
+ Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007
Free Software Foundation, Inc.
This file is part of GDB.
#include "regcache.h"
#include "target.h"
#include "linux-nat.h"
+#include "target-descriptions.h"
+#include "xml-support.h"
#include "arm-tdep.h"
+#include "arm-linux-tdep.h"
#include <sys/user.h>
#include <sys/ptrace.h>
#define PTRACE_GET_THREAD_AREA 22
#endif
-extern int arm_apcs_32;
+#ifndef PTRACE_GETWMMXREGS
+#define PTRACE_GETWMMXREGS 18
+#define PTRACE_SETWMMXREGS 19
+#endif
+
+/* A flag for whether the WMMX registers are available. */
+static int arm_linux_has_wmmx_registers;
-#define typeNone 0x00
-#define typeSingle 0x01
-#define typeDouble 0x02
-#define typeExtended 0x03
-#define FPWORDS 28
-#define ARM_CPSR_REGNUM 16
-
-typedef union tagFPREG
- {
- unsigned int fSingle;
- unsigned int fDouble[2];
- unsigned int fExtended[3];
- }
-FPREG;
-
-typedef struct tagFPA11
- {
- FPREG fpreg[8]; /* 8 floating point registers */
- unsigned int fpsr; /* floating point status register */
- unsigned int fpcr; /* floating point control register */
- unsigned char fType[8]; /* type of floating point value held in
- floating point registers. */
- int initflag; /* NWFPE initialization flag. */
- }
-FPA11;
+extern int arm_apcs_32;
/* The following variables are used to determine the version of the
underlying GNU/Linux operating system. Examples:
tid = PIDGET (ptid);
return tid;
}
-#define GET_THREAD_ID(PTID) get_thread_id ((PTID));
-
-static void
-fetch_nwfpe_single (unsigned int fn, FPA11 * fpa11)
-{
- unsigned int mem[3];
-
- mem[0] = fpa11->fpreg[fn].fSingle;
- mem[1] = 0;
- mem[2] = 0;
- regcache_raw_supply (current_regcache, ARM_F0_REGNUM + fn, (char *) &mem[0]);
-}
-
-static void
-fetch_nwfpe_double (unsigned int fn, FPA11 * fpa11)
-{
- unsigned int mem[3];
-
- mem[0] = fpa11->fpreg[fn].fDouble[1];
- mem[1] = fpa11->fpreg[fn].fDouble[0];
- mem[2] = 0;
- regcache_raw_supply (current_regcache, ARM_F0_REGNUM + fn, (char *) &mem[0]);
-}
-
-static void
-fetch_nwfpe_none (unsigned int fn)
-{
- unsigned int mem[3] =
- {0, 0, 0};
-
- regcache_raw_supply (current_regcache, ARM_F0_REGNUM + fn, (char *) &mem[0]);
-}
-
-static void
-fetch_nwfpe_extended (unsigned int fn, FPA11 * fpa11)
-{
- unsigned int mem[3];
-
- mem[0] = fpa11->fpreg[fn].fExtended[0]; /* sign & exponent */
- mem[1] = fpa11->fpreg[fn].fExtended[2]; /* ls bits */
- mem[2] = fpa11->fpreg[fn].fExtended[1]; /* ms bits */
- regcache_raw_supply (current_regcache, ARM_F0_REGNUM + fn, (char *) &mem[0]);
-}
-
-static void
-fetch_nwfpe_register (int regno, FPA11 * fpa11)
-{
- int fn = regno - ARM_F0_REGNUM;
-
- switch (fpa11->fType[fn])
- {
- case typeSingle:
- fetch_nwfpe_single (fn, fpa11);
- break;
-
- case typeDouble:
- fetch_nwfpe_double (fn, fpa11);
- break;
-
- case typeExtended:
- fetch_nwfpe_extended (fn, fpa11);
- break;
-
- default:
- fetch_nwfpe_none (fn);
- }
-}
-
-static void
-store_nwfpe_single (unsigned int fn, FPA11 *fpa11)
-{
- unsigned int mem[3];
-
- regcache_raw_collect (current_regcache, ARM_F0_REGNUM + fn,
- (char *) &mem[0]);
- fpa11->fpreg[fn].fSingle = mem[0];
- fpa11->fType[fn] = typeSingle;
-}
-
-static void
-store_nwfpe_double (unsigned int fn, FPA11 *fpa11)
-{
- unsigned int mem[3];
-
- regcache_raw_collect (current_regcache, ARM_F0_REGNUM + fn,
- (char *) &mem[0]);
- fpa11->fpreg[fn].fDouble[1] = mem[0];
- fpa11->fpreg[fn].fDouble[0] = mem[1];
- fpa11->fType[fn] = typeDouble;
-}
-
-void
-store_nwfpe_extended (unsigned int fn, FPA11 *fpa11)
-{
- unsigned int mem[3];
-
- regcache_raw_collect (current_regcache, ARM_F0_REGNUM + fn,
- (char *) &mem[0]);
- fpa11->fpreg[fn].fExtended[0] = mem[0]; /* sign & exponent */
- fpa11->fpreg[fn].fExtended[2] = mem[1]; /* ls bits */
- fpa11->fpreg[fn].fExtended[1] = mem[2]; /* ms bits */
- fpa11->fType[fn] = typeDouble;
-}
-
-void
-store_nwfpe_register (int regno, FPA11 * fpa11)
-{
- if (register_cached (regno))
- {
- unsigned int fn = regno - ARM_F0_REGNUM;
- switch (fpa11->fType[fn])
- {
- case typeSingle:
- store_nwfpe_single (fn, fpa11);
- break;
-
- case typeDouble:
- store_nwfpe_double (fn, fpa11);
- break;
-
- case typeExtended:
- store_nwfpe_extended (fn, fpa11);
- break;
- }
- }
-}
-
+#define GET_THREAD_ID(PTID) get_thread_id (PTID)
/* Get the value of a particular register from the floating point
state of the process and store it into regcache. */
fetch_fpregister (int regno)
{
int ret, tid;
- FPA11 fp;
+ 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);
+ ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to fetch floating point register."));
/* Fetch fpsr. */
if (ARM_FPS_REGNUM == regno)
- regcache_raw_supply (current_regcache, ARM_FPS_REGNUM, (char *) &fp.fpsr);
+ regcache_raw_supply (current_regcache, ARM_FPS_REGNUM,
+ fp + NWFPE_FPSR_OFFSET);
/* Fetch the floating point register. */
if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
- {
- int fn = regno - ARM_F0_REGNUM;
-
- switch (fp.fType[fn])
- {
- case typeSingle:
- fetch_nwfpe_single (fn, &fp);
- break;
-
- case typeDouble:
- fetch_nwfpe_double (fn, &fp);
- break;
-
- case typeExtended:
- fetch_nwfpe_extended (fn, &fp);
- break;
-
- default:
- fetch_nwfpe_none (fn);
- }
- }
+ supply_nwfpe_register (current_regcache, regno, fp);
}
/* Get the whole floating point state of the process and store it
fetch_fpregs (void)
{
int ret, regno, tid;
- FPA11 fp;
+ 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);
+ ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to fetch the floating point registers."));
}
/* Fetch fpsr. */
- regcache_raw_supply (current_regcache, ARM_FPS_REGNUM, (char *) &fp.fpsr);
+ regcache_raw_supply (current_regcache, ARM_FPS_REGNUM,
+ fp + NWFPE_FPSR_OFFSET);
/* Fetch the floating point registers. */
for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
- {
- int fn = regno - ARM_F0_REGNUM;
-
- switch (fp.fType[fn])
- {
- case typeSingle:
- fetch_nwfpe_single (fn, &fp);
- break;
-
- case typeDouble:
- fetch_nwfpe_double (fn, &fp);
- break;
-
- case typeExtended:
- fetch_nwfpe_extended (fn, &fp);
- break;
-
- default:
- fetch_nwfpe_none (fn);
- }
- }
+ supply_nwfpe_register (current_regcache, regno, fp);
}
/* Save a particular register into the floating point state of the
store_fpregister (int regno)
{
int ret, tid;
- FPA11 fp;
+ 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);
+ ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to fetch the floating point registers."));
/* Store fpsr. */
if (ARM_FPS_REGNUM == regno && register_cached (ARM_FPS_REGNUM))
- regcache_raw_collect (current_regcache, ARM_FPS_REGNUM, (char *) &fp.fpsr);
+ regcache_raw_collect (current_regcache, ARM_FPS_REGNUM,
+ fp + NWFPE_FPSR_OFFSET);
/* Store the floating point register. */
if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
- {
- store_nwfpe_register (regno, &fp);
- }
+ collect_nwfpe_register (current_regcache, regno, fp);
- ret = ptrace (PTRACE_SETFPREGS, tid, 0, &fp);
+ ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to store floating point register."));
store_fpregs (void)
{
int ret, regno, tid;
- FPA11 fp;
+ 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);
+ ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to fetch the floating point registers."));
/* Store fpsr. */
if (register_cached (ARM_FPS_REGNUM))
- regcache_raw_collect (current_regcache, ARM_FPS_REGNUM, (char *) &fp.fpsr);
+ regcache_raw_collect (current_regcache, ARM_FPS_REGNUM,
+ fp + NWFPE_FPSR_OFFSET);
/* Store the floating point registers. */
for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
- {
- fetch_nwfpe_register (regno, &fp);
- }
+ if (register_cached (regno))
+ collect_nwfpe_register (current_regcache, regno, fp);
- ret = ptrace (PTRACE_SETFPREGS, tid, 0, &fp);
+ ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to store floating point 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 (void)
+{
+ char regbuf[IWMMXT_REGS_SIZE];
+ int ret, regno, tid;
+
+ /* Get the thread id for the ptrace call. */
+ tid = GET_THREAD_ID (inferior_ptid);
+
+ ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
+ if (ret < 0)
+ {
+ warning (_("Unable to fetch WMMX registers."));
+ return;
+ }
+
+ for (regno = 0; regno < 16; regno++)
+ regcache_raw_supply (current_regcache, regno + ARM_WR0_REGNUM,
+ ®buf[regno * 8]);
+
+ for (regno = 0; regno < 2; regno++)
+ regcache_raw_supply (current_regcache, regno + ARM_WCSSF_REGNUM,
+ ®buf[16 * 8 + regno * 4]);
+
+ for (regno = 0; regno < 4; regno++)
+ regcache_raw_supply (current_regcache, regno + ARM_WCGR0_REGNUM,
+ ®buf[16 * 8 + 2 * 4 + regno * 4]);
+}
+
+static void
+store_wmmx_regs (void)
+{
+ char regbuf[IWMMXT_REGS_SIZE];
+ int ret, regno, tid;
+
+ /* Get the thread id for the ptrace call. */
+ tid = GET_THREAD_ID (inferior_ptid);
+
+ ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
+ if (ret < 0)
+ {
+ warning (_("Unable to fetch WMMX registers."));
+ return;
+ }
+
+ for (regno = 0; regno < 16; regno++)
+ if (register_cached (regno + ARM_WR0_REGNUM))
+ regcache_raw_collect (current_regcache, regno + ARM_WR0_REGNUM,
+ ®buf[regno * 8]);
+
+ for (regno = 0; regno < 2; regno++)
+ if (register_cached (regno + ARM_WCSSF_REGNUM))
+ regcache_raw_collect (current_regcache, regno + ARM_WCSSF_REGNUM,
+ ®buf[16 * 8 + regno * 4]);
+
+ for (regno = 0; regno < 4; regno++)
+ if (register_cached (regno + ARM_WCGR0_REGNUM))
+ regcache_raw_collect (current_regcache, 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;
+ }
+}
+
/* 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. */
{
fetch_regs ();
fetch_fpregs ();
+ if (arm_linux_has_wmmx_registers)
+ fetch_wmmx_regs ();
}
else
{
- if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM)
+ if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
fetch_register (regno);
-
- if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM)
+ else if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM)
fetch_fpregister (regno);
+ else if (arm_linux_has_wmmx_registers
+ && regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
+ fetch_wmmx_regs ();
}
}
{
store_regs ();
store_fpregs ();
+ if (arm_linux_has_wmmx_registers)
+ store_wmmx_regs ();
}
else
{
- if ((regno < ARM_F0_REGNUM) || (regno > ARM_FPS_REGNUM))
+ if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
store_register (regno);
-
- if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM))
+ else if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM))
store_fpregister (regno);
+ else if (arm_linux_has_wmmx_registers
+ && regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
+ store_wmmx_regs ();
}
}
-/* Fill register regno (if it is a general-purpose register) in
- *gregsetp with the appropriate value from GDB's register array.
- If regno is -1, do this for all registers. */
+/* Wrapper functions for the standard regset handling, used by
+ thread debugging. */
void
fill_gregset (gdb_gregset_t *gregsetp, int regno)
{
- if (-1 == regno)
- {
- int regnum;
- for (regnum = ARM_A1_REGNUM; regnum <= ARM_PC_REGNUM; regnum++)
- regcache_raw_collect (current_regcache, regnum,
- (char *) &(*gregsetp)[regnum]);
- }
- else if (regno >= ARM_A1_REGNUM && regno <= ARM_PC_REGNUM)
- regcache_raw_collect (current_regcache, regno,
- (char *) &(*gregsetp)[regno]);
-
- if (ARM_PS_REGNUM == regno || -1 == regno)
- {
- if (arm_apcs_32)
- regcache_raw_collect (current_regcache, ARM_PS_REGNUM,
- (char *) &(*gregsetp)[ARM_CPSR_REGNUM]);
- else
- regcache_raw_collect (current_regcache, ARM_PC_REGNUM,
- (char *) &(*gregsetp)[ARM_PC_REGNUM]);
- }
+ arm_linux_collect_gregset (NULL, current_regcache, regno, gregsetp, 0);
}
-/* Fill GDB's register array with the general-purpose register values
- in *gregsetp. */
-
void
supply_gregset (gdb_gregset_t *gregsetp)
{
- int regno, reg_pc;
-
- for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
- regcache_raw_supply (current_regcache, regno,
- (char *) &(*gregsetp)[regno]);
-
- if (arm_apcs_32)
- regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
- (char *) &(*gregsetp)[ARM_CPSR_REGNUM]);
- else
- regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
- (char *) &(*gregsetp)[ARM_PC_REGNUM]);
-
- reg_pc = ADDR_BITS_REMOVE ((CORE_ADDR)(*gregsetp)[ARM_PC_REGNUM]);
- regcache_raw_supply (current_regcache, ARM_PC_REGNUM, (char *) ®_pc);
+ arm_linux_supply_gregset (NULL, current_regcache, -1, gregsetp, 0);
}
-/* Fill register regno (if it is a floating-point register) in
- *fpregsetp with the appropriate value from GDB's register array.
- If regno is -1, do this for all registers. */
-
void
fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
{
- FPA11 *fp = (FPA11 *) fpregsetp;
-
- if (-1 == regno)
- {
- int regnum;
- for (regnum = ARM_F0_REGNUM; regnum <= ARM_F7_REGNUM; regnum++)
- store_nwfpe_register (regnum, fp);
- }
- else if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
- {
- store_nwfpe_register (regno, fp);
- return;
- }
-
- /* Store fpsr. */
- if (ARM_FPS_REGNUM == regno || -1 == regno)
- regcache_raw_collect (current_regcache, ARM_FPS_REGNUM,
- (char *) &fp->fpsr);
+ arm_linux_collect_nwfpe (NULL, current_regcache, regno, fpregsetp, 0);
}
/* Fill GDB's register array with the floating-point register values
void
supply_fpregset (gdb_fpregset_t *fpregsetp)
{
- int regno;
- FPA11 *fp = (FPA11 *) fpregsetp;
-
- /* Fetch fpsr. */
- regcache_raw_supply (current_regcache, ARM_FPS_REGNUM, (char *) &fp->fpsr);
-
- /* Fetch the floating point registers. */
- for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
- {
- fetch_nwfpe_register (regno, fp);
- }
+ arm_linux_supply_nwfpe (NULL, current_regcache, -1, fpregsetp, 0);
}
int
return ((*vmajor << 16) | (*vminor << 8) | *vrelease);
}
+static LONGEST (*super_xfer_partial) (struct target_ops *, enum target_object,
+ const char *, gdb_byte *, const gdb_byte *,
+ ULONGEST, LONGEST);
+
+static LONGEST
+arm_linux_xfer_partial (struct target_ops *ops,
+ enum target_object object,
+ const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (object == TARGET_OBJECT_AVAILABLE_FEATURES)
+ {
+ if (annex != NULL && strcmp (annex, "target.xml") == 0)
+ {
+ int ret;
+ char regbuf[IWMMXT_REGS_SIZE];
+
+ ret = ptrace (PTRACE_GETWMMXREGS, GET_THREAD_ID (inferior_ptid),
+ 0, regbuf);
+ if (ret < 0)
+ arm_linux_has_wmmx_registers = 0;
+ else
+ arm_linux_has_wmmx_registers = 1;
+
+ if (arm_linux_has_wmmx_registers)
+ annex = "arm-with-iwmmxt.xml";
+ else
+ return -1;
+ }
+
+ return xml_builtin_xfer_partial (annex, readbuf, writebuf, offset, len);
+ }
+
+ return super_xfer_partial (ops, object, annex, readbuf, writebuf,
+ offset, len);
+}
+
void _initialize_arm_linux_nat (void);
void
t->to_fetch_registers = arm_linux_fetch_inferior_registers;
t->to_store_registers = arm_linux_store_inferior_registers;
+ /* Override the default to_xfer_partial. */
+ super_xfer_partial = t->to_xfer_partial;
+ t->to_xfer_partial = arm_linux_xfer_partial;
+
/* Register the target. */
linux_nat_add_target (t);
}