/* Find a variable's value in memory, for GDB, the GNU debugger.
- Copyright (C) 1986, 1987 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1991, 1994, 1995 Free Software Foundation, Inc.
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
+This file is part of GDB.
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
-#include "initialize.h"
-#include "param.h"
#include "symtab.h"
+#include "gdbtypes.h"
#include "frame.h"
#include "value.h"
+#include "gdbcore.h"
+#include "inferior.h"
+#include "target.h"
+#include "gdb_string.h"
+
+/* Registers we shouldn't try to store. */
+#if !defined (CANNOT_STORE_REGISTER)
+#define CANNOT_STORE_REGISTER(regno) 0
+#endif
+
+static void write_register_pid PARAMS ((int regno, LONGEST val, int pid));
+
+/* Basic byte-swapping routines. GDB has needed these for a long time...
+ All extract a target-format integer at ADDR which is LEN bytes long. */
+
+#if TARGET_CHAR_BIT != 8 || HOST_CHAR_BIT != 8
+ /* 8 bit characters are a pretty safe assumption these days, so we
+ assume it throughout all these swapping routines. If we had to deal with
+ 9 bit characters, we would need to make len be in bits and would have
+ to re-write these routines... */
+ you lose
+#endif
+
+LONGEST
+extract_signed_integer (addr, len)
+ PTR addr;
+ int len;
+{
+ LONGEST retval;
+ unsigned char *p;
+ unsigned char *startaddr = (unsigned char *)addr;
+ unsigned char *endaddr = startaddr + len;
+
+ if (len > sizeof (LONGEST))
+ error ("\
+That operation is not available on integers of more than %d bytes.",
+ sizeof (LONGEST));
+
+ /* Start at the most significant end of the integer, and work towards
+ the least significant. */
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ {
+ p = startaddr;
+ /* Do the sign extension once at the start. */
+ retval = ((LONGEST)*p ^ 0x80) - 0x80;
+ for (++p; p < endaddr; ++p)
+ retval = (retval << 8) | *p;
+ }
+ else
+ {
+ p = endaddr - 1;
+ /* Do the sign extension once at the start. */
+ retval = ((LONGEST)*p ^ 0x80) - 0x80;
+ for (--p; p >= startaddr; --p)
+ retval = (retval << 8) | *p;
+ }
+ return retval;
+}
+
+unsigned LONGEST
+extract_unsigned_integer (addr, len)
+ PTR addr;
+ int len;
+{
+ unsigned LONGEST retval;
+ unsigned char *p;
+ unsigned char *startaddr = (unsigned char *)addr;
+ unsigned char *endaddr = startaddr + len;
+
+ if (len > sizeof (unsigned LONGEST))
+ error ("\
+That operation is not available on integers of more than %d bytes.",
+ sizeof (unsigned LONGEST));
+
+ /* Start at the most significant end of the integer, and work towards
+ the least significant. */
+ retval = 0;
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ {
+ for (p = startaddr; p < endaddr; ++p)
+ retval = (retval << 8) | *p;
+ }
+ else
+ {
+ for (p = endaddr - 1; p >= startaddr; --p)
+ retval = (retval << 8) | *p;
+ }
+ return retval;
+}
+
+CORE_ADDR
+extract_address (addr, len)
+ PTR addr;
+ int len;
+{
+ /* Assume a CORE_ADDR can fit in a LONGEST (for now). Not sure
+ whether we want this to be true eventually. */
+ return extract_unsigned_integer (addr, len);
+}
+
+void
+store_signed_integer (addr, len, val)
+ PTR addr;
+ int len;
+ LONGEST val;
+{
+ unsigned char *p;
+ unsigned char *startaddr = (unsigned char *)addr;
+ unsigned char *endaddr = startaddr + len;
+
+ /* Start at the least significant end of the integer, and work towards
+ the most significant. */
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ {
+ for (p = endaddr - 1; p >= startaddr; --p)
+ {
+ *p = val & 0xff;
+ val >>= 8;
+ }
+ }
+ else
+ {
+ for (p = startaddr; p < endaddr; ++p)
+ {
+ *p = val & 0xff;
+ val >>= 8;
+ }
+ }
+}
+
+void
+store_unsigned_integer (addr, len, val)
+ PTR addr;
+ int len;
+ unsigned LONGEST val;
+{
+ unsigned char *p;
+ unsigned char *startaddr = (unsigned char *)addr;
+ unsigned char *endaddr = startaddr + len;
+
+ /* Start at the least significant end of the integer, and work towards
+ the most significant. */
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ {
+ for (p = endaddr - 1; p >= startaddr; --p)
+ {
+ *p = val & 0xff;
+ val >>= 8;
+ }
+ }
+ else
+ {
+ for (p = startaddr; p < endaddr; ++p)
+ {
+ *p = val & 0xff;
+ val >>= 8;
+ }
+ }
+}
-CORE_ADDR read_register ();
+void
+store_address (addr, len, val)
+ PTR addr;
+ int len;
+ CORE_ADDR val;
+{
+ /* Assume a CORE_ADDR can fit in a LONGEST (for now). Not sure
+ whether we want this to be true eventually. */
+ store_unsigned_integer (addr, len, (LONGEST)val);
+}
+\f
+/* Swap LEN bytes at BUFFER between target and host byte-order. */
+#define SWAP_FLOATING(buffer,len) \
+ do \
+ { \
+ if (TARGET_BYTE_ORDER != HOST_BYTE_ORDER) \
+ { \
+ char tmp; \
+ char *p = (char *)(buffer); \
+ char *q = ((char *)(buffer)) + len - 1; \
+ for (; p < q; p++, q--) \
+ { \
+ tmp = *q; \
+ *q = *p; \
+ *p = tmp; \
+ } \
+ } \
+ } \
+ while (0)
+
+/* There are various problems with the extract_floating and store_floating
+ routines.
+
+ 1. These routines only handle byte-swapping, not conversion of
+ formats. So if host is IEEE floating and target is VAX floating,
+ or vice-versa, it loses. This means that we can't (yet) use these
+ routines for extendeds. Extendeds are handled by
+ REGISTER_CONVERTIBLE. What we want is to use floatformat.h, but that
+ doesn't yet handle VAX floating at all.
+
+ 2. We can't deal with it if there is more than one floating point
+ format in use. This has to be fixed at the unpack_double level.
+
+ 3. We probably should have a LONGEST_DOUBLE or DOUBLEST or whatever
+ we want to call it which is long double where available. */
+
+double
+extract_floating (addr, len)
+ PTR addr;
+ int len;
+{
+ if (len == sizeof (float))
+ {
+ float retval;
+ memcpy (&retval, addr, sizeof (retval));
+ SWAP_FLOATING (&retval, sizeof (retval));
+ return retval;
+ }
+ else if (len == sizeof (double))
+ {
+ double retval;
+ memcpy (&retval, addr, sizeof (retval));
+ SWAP_FLOATING (&retval, sizeof (retval));
+ return retval;
+ }
+ else
+ {
+ error ("Can't deal with a floating point number of %d bytes.", len);
+ }
+}
-START_FILE
+void
+store_floating (addr, len, val)
+ PTR addr;
+ int len;
+ double val;
+{
+ if (len == sizeof (float))
+ {
+ float floatval = val;
+ SWAP_FLOATING (&floatval, sizeof (floatval));
+ memcpy (addr, &floatval, sizeof (floatval));
+ }
+ else if (len == sizeof (double))
+ {
+ SWAP_FLOATING (&val, sizeof (val));
+ memcpy (addr, &val, sizeof (val));
+ }
+ else
+ {
+ error ("Can't deal with a floating point number of %d bytes.", len);
+ }
+}
\f
+#if !defined (GET_SAVED_REGISTER)
+
/* Return the address in which frame FRAME's value of register REGNUM
has been saved in memory. Or return zero if it has not been saved.
If REGNUM specifies the SP, the value we return is actually
the SP value, not an address where it was saved. */
-static CORE_ADDR
+CORE_ADDR
find_saved_register (frame, regnum)
- FRAME frame;
+ struct frame_info *frame;
int regnum;
{
- struct frame_info fi;
struct frame_saved_regs saved_regs;
- register FRAME frame1 = 0;
+ register struct frame_info *frame1 = NULL;
register CORE_ADDR addr = 0;
+ if (frame == NULL) /* No regs saved if want current frame */
+ return 0;
+
+#ifdef HAVE_REGISTER_WINDOWS
+ /* We assume that a register in a register window will only be saved
+ in one place (since the name changes and/or disappears as you go
+ towards inner frames), so we only call get_frame_saved_regs on
+ the current frame. This is directly in contradiction to the
+ usage below, which assumes that registers used in a frame must be
+ saved in a lower (more interior) frame. This change is a result
+ of working on a register window machine; get_frame_saved_regs
+ always returns the registers saved within a frame, within the
+ context (register namespace) of that frame. */
+
+ /* However, note that we don't want this to return anything if
+ nothing is saved (if there's a frame inside of this one). Also,
+ callers to this routine asking for the stack pointer want the
+ stack pointer saved for *this* frame; this is returned from the
+ next frame. */
+
+ if (REGISTER_IN_WINDOW_P(regnum))
+ {
+ frame1 = get_next_frame (frame);
+ if (!frame1) return 0; /* Registers of this frame are active. */
+
+ /* Get the SP from the next frame in; it will be this
+ current frame. */
+ if (regnum != SP_REGNUM)
+ frame1 = frame;
+
+ get_frame_saved_regs (frame1, &saved_regs);
+ return saved_regs.regs[regnum]; /* ... which might be zero */
+ }
+#endif /* HAVE_REGISTER_WINDOWS */
+
+ /* Note that this next routine assumes that registers used in
+ frame x will be saved only in the frame that x calls and
+ frames interior to it. This is not true on the sparc, but the
+ above macro takes care of it, so we should be all right. */
while (1)
{
QUIT;
- fi = get_prev_frame_info (frame1);
- if (fi.frame == 0 || fi.frame == frame)
+ frame1 = get_prev_frame (frame1);
+ if (frame1 == 0 || frame1 == frame)
break;
- get_frame_saved_regs (&fi, &saved_regs);
+ get_frame_saved_regs (frame1, &saved_regs);
if (saved_regs.regs[regnum])
addr = saved_regs.regs[regnum];
- frame1 = fi.frame;
}
return addr;
}
-/* Copy the bytes of register REGNUM, relative to the current stack frame,
- into our memory at MYADDR.
- The number of bytes copied is REGISTER_RAW_SIZE (REGNUM). */
+/* Find register number REGNUM relative to FRAME and put its (raw,
+ target format) contents in *RAW_BUFFER. Set *OPTIMIZED if the
+ variable was optimized out (and thus can't be fetched). Set *LVAL
+ to lval_memory, lval_register, or not_lval, depending on whether
+ the value was fetched from memory, from a register, or in a strange
+ and non-modifiable way (e.g. a frame pointer which was calculated
+ rather than fetched). Set *ADDRP to the address, either in memory
+ on as a REGISTER_BYTE offset into the registers array.
+
+ Note that this implementation never sets *LVAL to not_lval. But
+ it can be replaced by defining GET_SAVED_REGISTER and supplying
+ your own.
+
+ The argument RAW_BUFFER must point to aligned memory. */
void
-read_relative_register_raw_bytes (regnum, myaddr)
+get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
+ char *raw_buffer;
+ int *optimized;
+ CORE_ADDR *addrp;
+ struct frame_info *frame;
int regnum;
- char *myaddr;
+ enum lval_type *lval;
{
- register CORE_ADDR addr;
+ CORE_ADDR addr;
- if (regnum == FP_REGNUM)
- {
- bcopy (&selected_frame, myaddr, sizeof (CORE_ADDR));
- return;
- }
+ if (!target_has_registers)
+ error ("No registers.");
- addr = find_saved_register (selected_frame, regnum);
-
- if (addr)
+ /* Normal systems don't optimize out things with register numbers. */
+ if (optimized != NULL)
+ *optimized = 0;
+ addr = find_saved_register (frame, regnum);
+ if (addr != 0)
{
+ if (lval != NULL)
+ *lval = lval_memory;
if (regnum == SP_REGNUM)
{
- CORE_ADDR buffer = addr;
- bcopy (&buffer, myaddr, sizeof (CORE_ADDR));
+ if (raw_buffer != NULL)
+ {
+ /* Put it back in target format. */
+ store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), addr);
+ }
+ if (addrp != NULL)
+ *addrp = 0;
+ return;
}
- else
- read_memory (addr, myaddr, REGISTER_RAW_SIZE (regnum));
- return;
+ if (raw_buffer != NULL)
+ read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum));
+ }
+ else
+ {
+ if (lval != NULL)
+ *lval = lval_register;
+ addr = REGISTER_BYTE (regnum);
+ if (raw_buffer != NULL)
+ read_register_gen (regnum, raw_buffer);
+ }
+ if (addrp != NULL)
+ *addrp = addr;
+}
+#endif /* GET_SAVED_REGISTER. */
+
+/* Copy the bytes of register REGNUM, relative to the current stack frame,
+ into our memory at MYADDR, in target byte order.
+ The number of bytes copied is REGISTER_RAW_SIZE (REGNUM).
+
+ Returns 1 if could not be read, 0 if could. */
+
+int
+read_relative_register_raw_bytes (regnum, myaddr)
+ int regnum;
+ char *myaddr;
+{
+ int optim;
+ if (regnum == FP_REGNUM && selected_frame)
+ {
+ /* Put it back in target format. */
+ store_address (myaddr, REGISTER_RAW_SIZE(FP_REGNUM),
+ FRAME_FP(selected_frame));
+ return 0;
}
- read_register_bytes (REGISTER_BYTE (regnum),
- myaddr, REGISTER_RAW_SIZE (regnum));
+
+ get_saved_register (myaddr, &optim, (CORE_ADDR *) NULL, selected_frame,
+ regnum, (enum lval_type *)NULL);
+ return optim;
}
/* Return a `value' with the contents of register REGNUM
in its virtual format, with the type specified by
REGISTER_VIRTUAL_TYPE. */
-value
+value_ptr
value_of_register (regnum)
int regnum;
{
- register CORE_ADDR addr = find_saved_register (selected_frame, regnum);
- register value val;
+ CORE_ADDR addr;
+ int optim;
+ register value_ptr reg_val;
char raw_buffer[MAX_REGISTER_RAW_SIZE];
- char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE];
+ enum lval_type lval;
+
+ get_saved_register (raw_buffer, &optim, &addr,
+ selected_frame, regnum, &lval);
+
+ reg_val = allocate_value (REGISTER_VIRTUAL_TYPE (regnum));
- if (addr)
+ /* Convert raw data to virtual format if necessary. */
+
+#ifdef REGISTER_CONVERTIBLE
+ if (REGISTER_CONVERTIBLE (regnum))
{
- if (regnum == SP_REGNUM)
- return value_from_long (builtin_type_int, addr);
- read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum));
+ REGISTER_CONVERT_TO_VIRTUAL (regnum, REGISTER_VIRTUAL_TYPE (regnum),
+ raw_buffer, VALUE_CONTENTS_RAW (reg_val));
}
else
- read_register_bytes (REGISTER_BYTE (regnum), raw_buffer,
- REGISTER_RAW_SIZE (regnum));
-
- REGISTER_CONVERT_TO_VIRTUAL (regnum, raw_buffer, virtual_buffer);
- val = allocate_value (REGISTER_VIRTUAL_TYPE (regnum));
- bcopy (virtual_buffer, VALUE_CONTENTS (val), REGISTER_VIRTUAL_SIZE (regnum));
- VALUE_LVAL (val) = addr ? lval_memory : lval_register;
- VALUE_ADDRESS (val) = addr ? addr : REGISTER_BYTE (regnum);
- VALUE_REGNO (val) = regnum;
- return val;
+#endif
+ memcpy (VALUE_CONTENTS_RAW (reg_val), raw_buffer,
+ REGISTER_RAW_SIZE (regnum));
+ VALUE_LVAL (reg_val) = lval;
+ VALUE_ADDRESS (reg_val) = addr;
+ VALUE_REGNO (reg_val) = regnum;
+ VALUE_OPTIMIZED_OUT (reg_val) = optim;
+ return reg_val;
}
\f
/* Low level examining and depositing of registers.
- Note that you must call `fetch_registers' once
- before examining or depositing any registers. */
+ The caller is responsible for making
+ sure that the inferior is stopped before calling the fetching routines,
+ or it will get garbage. (a change from GDB version 3, in which
+ the caller got the value from the last stop). */
+
+/* Contents of the registers in target byte order.
+ We allocate some extra slop since we do a lot of memcpy's around `registers',
+ and failing-soft is better than failing hard. */
+char registers[REGISTER_BYTES + /* SLOP */ 256];
+
+/* Nonzero if that register has been fetched. */
+char register_valid[NUM_REGS];
+
+/* The thread/process associated with the current set of registers. For now,
+ -1 is special, and means `no current process'. */
+int registers_pid = -1;
-char registers[REGISTER_BYTES];
+/* Indicate that registers may have changed, so invalidate the cache. */
-/* Copy LEN bytes of consecutive data from registers
- starting with the REGBYTE'th byte of register data
+void
+registers_changed ()
+{
+ int i;
+ int numregs = ARCH_NUM_REGS;
+
+ registers_pid = -1;
+
+ for (i = 0; i < numregs; i++)
+ register_valid[i] = 0;
+
+ if (registers_changed_hook)
+ registers_changed_hook ();
+}
+
+/* Indicate that all registers have been fetched, so mark them all valid. */
+void
+registers_fetched ()
+{
+ int i;
+ int numregs = ARCH_NUM_REGS;
+ for (i = 0; i < numregs; i++)
+ register_valid[i] = 1;
+}
+
+/* read_register_bytes and write_register_bytes are generally a *BAD* idea.
+ They are inefficient because they need to check for partial updates, which
+ can only be done by scanning through all of the registers and seeing if the
+ bytes that are being read/written fall inside of an invalid register. [The
+ main reason this is necessary is that register sizes can vary, so a simple
+ index won't suffice.] It is far better to call read_register_gen if you
+ want to get at the raw register contents, as it only takes a regno as an
+ argument, and therefore can't do a partial register update. It would also
+ be good to have a write_register_gen for similar reasons.
+
+ Prior to the recent fixes to check for partial updates, both read and
+ write_register_bytes always checked to see if any registers were stale, and
+ then called target_fetch_registers (-1) to update the whole set. This
+ caused really slowed things down for remote targets. */
+
+/* Copy INLEN bytes of consecutive data from registers
+ starting with the INREGBYTE'th byte of register data
into memory at MYADDR. */
-read_register_bytes (regbyte, myaddr, len)
- int regbyte;
+void
+read_register_bytes (inregbyte, myaddr, inlen)
+ int inregbyte;
char *myaddr;
- int len;
+ int inlen;
{
- bcopy (®isters[regbyte], myaddr, len);
+ int inregend = inregbyte + inlen;
+ int regno;
+
+ if (registers_pid != inferior_pid)
+ {
+ registers_changed ();
+ registers_pid = inferior_pid;
+ }
+
+ /* See if we are trying to read bytes from out-of-date registers. If so,
+ update just those registers. */
+
+ for (regno = 0; regno < NUM_REGS; regno++)
+ {
+ int regstart, regend;
+ int startin, endin;
+
+ if (register_valid[regno])
+ continue;
+
+ regstart = REGISTER_BYTE (regno);
+ regend = regstart + REGISTER_RAW_SIZE (regno);
+
+ startin = regstart >= inregbyte && regstart < inregend;
+ endin = regend > inregbyte && regend <= inregend;
+
+ if (!startin && !endin)
+ continue;
+
+ /* We've found an invalid register where at least one byte will be read.
+ Update it from the target. */
+
+ target_fetch_registers (regno);
+
+ if (!register_valid[regno])
+ error ("read_register_bytes: Couldn't update register %d.", regno);
+ }
+
+ if (myaddr != NULL)
+ memcpy (myaddr, ®isters[inregbyte], inlen);
}
-/* Copy LEN bytes of consecutive data from memory at MYADDR
- into registers starting with the REGBYTE'th byte of register data. */
+/* Read register REGNO into memory at MYADDR, which must be large enough
+ for REGISTER_RAW_BYTES (REGNO). Target byte-order.
+ If the register is known to be the size of a CORE_ADDR or smaller,
+ read_register can be used instead. */
+void
+read_register_gen (regno, myaddr)
+ int regno;
+ char *myaddr;
+{
+ if (registers_pid != inferior_pid)
+ {
+ registers_changed ();
+ registers_pid = inferior_pid;
+ }
-write_register_bytes (regbyte, myaddr, len)
- int regbyte;
+ if (!register_valid[regno])
+ target_fetch_registers (regno);
+ memcpy (myaddr, ®isters[REGISTER_BYTE (regno)],
+ REGISTER_RAW_SIZE (regno));
+}
+
+/* Write register REGNO at MYADDR to the target. MYADDR points at
+ REGISTER_RAW_BYTES(REGNO), which must be in target byte-order. */
+
+void
+write_register_gen (regno, myaddr)
+ int regno;
char *myaddr;
- int len;
{
- bcopy (myaddr, ®isters[regbyte], len);
- if (have_inferior_p ())
- store_inferior_registers (-1);
+ int size;
+
+ /* On the sparc, writing %g0 is a no-op, so we don't even want to change
+ the registers array if something writes to this register. */
+ if (CANNOT_STORE_REGISTER (regno))
+ return;
+
+ if (registers_pid != inferior_pid)
+ {
+ registers_changed ();
+ registers_pid = inferior_pid;
+ }
+
+ size = REGISTER_RAW_SIZE(regno);
+
+ /* If we have a valid copy of the register, and new value == old value,
+ then don't bother doing the actual store. */
+
+ if (register_valid [regno]
+ && memcmp (®isters[REGISTER_BYTE (regno)], myaddr, size) == 0)
+ return;
+
+ target_prepare_to_store ();
+
+ memcpy (®isters[REGISTER_BYTE (regno)], myaddr, size);
+
+ register_valid [regno] = 1;
+
+ target_store_registers (regno);
+}
+
+/* Copy INLEN bytes of consecutive data from memory at MYADDR
+ into registers starting with the MYREGSTART'th byte of register data. */
+
+void
+write_register_bytes (myregstart, myaddr, inlen)
+ int myregstart;
+ char *myaddr;
+ int inlen;
+{
+ int myregend = myregstart + inlen;
+ int regno;
+
+ target_prepare_to_store ();
+
+ /* Scan through the registers updating any that are covered by the range
+ myregstart<=>myregend using write_register_gen, which does nice things
+ like handling threads, and avoiding updates when the new and old contents
+ are the same. */
+
+ for (regno = 0; regno < NUM_REGS; regno++)
+ {
+ int regstart, regend;
+ int startin, endin;
+ char regbuf[MAX_REGISTER_RAW_SIZE];
+
+ regstart = REGISTER_BYTE (regno);
+ regend = regstart + REGISTER_RAW_SIZE (regno);
+
+ startin = regstart >= myregstart && regstart < myregend;
+ endin = regend > myregstart && regend <= myregend;
+
+ if (!startin && !endin)
+ continue; /* Register is completely out of range */
+
+ if (startin && endin) /* register is completely in range */
+ {
+ write_register_gen (regno, myaddr + (regstart - myregstart));
+ continue;
+ }
+
+ /* We may be doing a partial update of an invalid register. Update it
+ from the target before scribbling on it. */
+ read_register_gen (regno, regbuf);
+
+ if (startin)
+ memcpy (registers + regstart,
+ myaddr + regstart - myregstart,
+ myregend - regstart);
+ else /* endin */
+ memcpy (registers + myregstart,
+ myaddr,
+ regend - myregstart);
+ target_store_registers (regno);
+ }
}
-/* Return the contents of register REGNO,
- regarding it as an integer. */
+/* Return the raw contents of register REGNO, regarding it as an integer. */
+/* This probably should be returning LONGEST rather than CORE_ADDR. */
CORE_ADDR
read_register (regno)
int regno;
{
- /* This loses when REGISTER_RAW_SIZE (regno) != sizeof (int) */
- return *(int *) ®isters[REGISTER_BYTE (regno)];
+ if (registers_pid != inferior_pid)
+ {
+ registers_changed ();
+ registers_pid = inferior_pid;
+ }
+
+ if (!register_valid[regno])
+ target_fetch_registers (regno);
+
+ return extract_address (®isters[REGISTER_BYTE (regno)],
+ REGISTER_RAW_SIZE(regno));
+}
+
+CORE_ADDR
+read_register_pid (regno, pid)
+ int regno, pid;
+{
+ int save_pid;
+ CORE_ADDR retval;
+
+ if (pid == inferior_pid)
+ return read_register (regno);
+
+ save_pid = inferior_pid;
+
+ inferior_pid = pid;
+
+ retval = read_register (regno);
+
+ inferior_pid = save_pid;
+
+ return retval;
}
-/* Store VALUE in the register number REGNO, regarded as an integer. */
+/* Store VALUE, into the raw contents of register number REGNO. */
void
write_register (regno, val)
- int regno, val;
+ int regno;
+ LONGEST val;
{
- /* This loses when REGISTER_RAW_SIZE (regno) != sizeof (int) */
- *(int *) ®isters[REGISTER_BYTE (regno)] = val;
+ PTR buf;
+ int size;
+
+ /* On the sparc, writing %g0 is a no-op, so we don't even want to change
+ the registers array if something writes to this register. */
+ if (CANNOT_STORE_REGISTER (regno))
+ return;
+
+ if (registers_pid != inferior_pid)
+ {
+ registers_changed ();
+ registers_pid = inferior_pid;
+ }
- if (have_inferior_p ())
- store_inferior_registers (regno);
+ size = REGISTER_RAW_SIZE(regno);
+ buf = alloca (size);
+ store_signed_integer (buf, size, (LONGEST) val);
+
+ /* If we have a valid copy of the register, and new value == old value,
+ then don't bother doing the actual store. */
+
+ if (register_valid [regno]
+ && memcmp (®isters[REGISTER_BYTE (regno)], buf, size) == 0)
+ return;
+
+ target_prepare_to_store ();
+
+ memcpy (®isters[REGISTER_BYTE (regno)], buf, size);
+
+ register_valid [regno] = 1;
+
+ target_store_registers (regno);
+}
+
+static void
+write_register_pid (regno, val, pid)
+ int regno;
+ LONGEST val;
+ int pid;
+{
+ int save_pid;
+
+ if (pid == inferior_pid)
+ {
+ write_register (regno, val);
+ return;
+ }
+
+ save_pid = inferior_pid;
+
+ inferior_pid = pid;
+
+ write_register (regno, val);
+
+ inferior_pid = save_pid;
}
/* Record that register REGNO contains VAL.
int regno;
char *val;
{
- bcopy (val, ®isters[REGISTER_BYTE (regno)], REGISTER_RAW_SIZE (regno));
+ if (registers_pid != inferior_pid)
+ {
+ registers_changed ();
+ registers_pid = inferior_pid;
+ }
+
+ register_valid[regno] = 1;
+ memcpy (®isters[REGISTER_BYTE (regno)], val, REGISTER_RAW_SIZE (regno));
+
+ /* On some architectures, e.g. HPPA, there are a few stray bits in some
+ registers, that the rest of the code would like to ignore. */
+#ifdef CLEAN_UP_REGISTER_VALUE
+ CLEAN_UP_REGISTER_VALUE(regno, ®isters[REGISTER_BYTE(regno)]);
+#endif
+}
+
+
+/* This routine is getting awfully cluttered with #if's. It's probably
+ time to turn this into READ_PC and define it in the tm.h file.
+ Ditto for write_pc. */
+
+CORE_ADDR
+read_pc ()
+{
+#ifdef TARGET_READ_PC
+ return TARGET_READ_PC (inferior_pid);
+#else
+ return ADDR_BITS_REMOVE ((CORE_ADDR) read_register_pid (PC_REGNUM, inferior_pid));
+#endif
+}
+
+CORE_ADDR
+read_pc_pid (pid)
+ int pid;
+{
+#ifdef TARGET_READ_PC
+ return TARGET_READ_PC (pid);
+#else
+ return ADDR_BITS_REMOVE ((CORE_ADDR) read_register_pid (PC_REGNUM, pid));
+#endif
+}
+
+void
+write_pc (val)
+ CORE_ADDR val;
+{
+#ifdef TARGET_WRITE_PC
+ TARGET_WRITE_PC (val, inferior_pid);
+#else
+ write_register_pid (PC_REGNUM, val, inferior_pid);
+#ifdef NPC_REGNUM
+ write_register_pid (NPC_REGNUM, val + 4, inferior_pid);
+#ifdef NNPC_REGNUM
+ write_register_pid (NNPC_REGNUM, val + 8, inferior_pid);
+#endif
+#endif
+#endif
+}
+
+void
+write_pc_pid (val, pid)
+ CORE_ADDR val;
+ int pid;
+{
+#ifdef TARGET_WRITE_PC
+ TARGET_WRITE_PC (val, pid);
+#else
+ write_register_pid (PC_REGNUM, val, pid);
+#ifdef NPC_REGNUM
+ write_register_pid (NPC_REGNUM, val + 4, pid);
+#ifdef NNPC_REGNUM
+ write_register_pid (NNPC_REGNUM, val + 8, pid);
+#endif
+#endif
+#endif
+}
+
+/* Cope with strage ways of getting to the stack and frame pointers */
+
+CORE_ADDR
+read_sp ()
+{
+#ifdef TARGET_READ_SP
+ return TARGET_READ_SP ();
+#else
+ return read_register (SP_REGNUM);
+#endif
+}
+
+void
+write_sp (val)
+ CORE_ADDR val;
+{
+#ifdef TARGET_WRITE_SP
+ TARGET_WRITE_SP (val);
+#else
+ write_register (SP_REGNUM, val);
+#endif
+}
+
+CORE_ADDR
+read_fp ()
+{
+#ifdef TARGET_READ_FP
+ return TARGET_READ_FP ();
+#else
+ return read_register (FP_REGNUM);
+#endif
+}
+
+void
+write_fp (val)
+ CORE_ADDR val;
+{
+#ifdef TARGET_WRITE_FP
+ TARGET_WRITE_FP (val);
+#else
+ write_register (FP_REGNUM, val);
+#endif
}
\f
+/* Will calling read_var_value or locate_var_value on SYM end
+ up caring what frame it is being evaluated relative to? SYM must
+ be non-NULL. */
+int
+symbol_read_needs_frame (sym)
+ struct symbol *sym;
+{
+ switch (SYMBOL_CLASS (sym))
+ {
+ /* All cases listed explicitly so that gcc -Wall will detect it if
+ we failed to consider one. */
+ case LOC_REGISTER:
+ case LOC_ARG:
+ case LOC_REF_ARG:
+ case LOC_REGPARM:
+ case LOC_REGPARM_ADDR:
+ case LOC_LOCAL:
+ case LOC_LOCAL_ARG:
+ case LOC_BASEREG:
+ case LOC_BASEREG_ARG:
+ return 1;
+
+ case LOC_UNDEF:
+ case LOC_CONST:
+ case LOC_STATIC:
+ case LOC_TYPEDEF:
+
+ case LOC_LABEL:
+ /* Getting the address of a label can be done independently of the block,
+ even if some *uses* of that address wouldn't work so well without
+ the right frame. */
+
+ case LOC_BLOCK:
+ case LOC_CONST_BYTES:
+ case LOC_OPTIMIZED_OUT:
+ return 0;
+ }
+ return 1;
+}
+
/* Given a struct symbol for a variable,
- and a stack frame address, read the value of the variable
- and return a (pointer to a) struct value containing the value. */
+ and a stack frame id, read the value of the variable
+ and return a (pointer to a) struct value containing the value.
+ If the variable cannot be found, return a zero pointer.
+ If FRAME is NULL, use the selected_frame. */
-value
+value_ptr
read_var_value (var, frame)
register struct symbol *var;
- FRAME frame;
+ struct frame_info *frame;
{
- register value v;
-
- struct frame_info fi;
-
+ register value_ptr v;
struct type *type = SYMBOL_TYPE (var);
- register CORE_ADDR addr = 0;
- int val = SYMBOL_VALUE (var);
+ CORE_ADDR addr;
register int len;
v = allocate_value (type);
VALUE_LVAL (v) = lval_memory; /* The most likely possibility. */
len = TYPE_LENGTH (type);
- if (frame == 0) frame = selected_frame;
+ if (frame == NULL) frame = selected_frame;
switch (SYMBOL_CLASS (var))
{
case LOC_CONST:
- case LOC_LABEL:
- bcopy (&val, VALUE_CONTENTS (v), len);
+ /* Put the constant back in target format. */
+ store_signed_integer (VALUE_CONTENTS_RAW (v), len,
+ (LONGEST) SYMBOL_VALUE (var));
VALUE_LVAL (v) = not_lval;
return v;
- case LOC_CONST_BYTES:
- bcopy (val, VALUE_CONTENTS (v), len);
+ case LOC_LABEL:
+ /* Put the constant back in target format. */
+ store_address (VALUE_CONTENTS_RAW (v), len, SYMBOL_VALUE_ADDRESS (var));
VALUE_LVAL (v) = not_lval;
return v;
+ case LOC_CONST_BYTES:
+ {
+ char *bytes_addr;
+ bytes_addr = SYMBOL_VALUE_BYTES (var);
+ memcpy (VALUE_CONTENTS_RAW (v), bytes_addr, len);
+ VALUE_LVAL (v) = not_lval;
+ return v;
+ }
+
case LOC_STATIC:
- addr = val;
+ addr = SYMBOL_VALUE_ADDRESS (var);
break;
case LOC_ARG:
- fi = get_frame_info (frame);
- addr = val + FRAME_ARGS_ADDRESS (fi);
+ if (frame == NULL)
+ return 0;
+ addr = FRAME_ARGS_ADDRESS (frame);
+ if (!addr)
+ return 0;
+ addr += SYMBOL_VALUE (var);
+ break;
+
+ case LOC_REF_ARG:
+ if (frame == NULL)
+ return 0;
+ addr = FRAME_ARGS_ADDRESS (frame);
+ if (!addr)
+ return 0;
+ addr += SYMBOL_VALUE (var);
+ addr = read_memory_unsigned_integer
+ (addr, TARGET_PTR_BIT / TARGET_CHAR_BIT);
break;
case LOC_LOCAL:
- fi = get_frame_info (frame);
- addr = val + FRAME_LOCALS_ADDRESS (fi);
+ case LOC_LOCAL_ARG:
+ if (frame == NULL)
+ return 0;
+ addr = FRAME_LOCALS_ADDRESS (frame);
+ addr += SYMBOL_VALUE (var);
break;
+ case LOC_BASEREG:
+ case LOC_BASEREG_ARG:
+ {
+ char buf[MAX_REGISTER_RAW_SIZE];
+ get_saved_register (buf, NULL, NULL, frame, SYMBOL_BASEREG (var),
+ NULL);
+ addr = extract_address (buf, REGISTER_RAW_SIZE (SYMBOL_BASEREG (var)));
+ addr += SYMBOL_VALUE (var);
+ break;
+ }
+
case LOC_TYPEDEF:
error ("Cannot look up value of a typedef");
+ break;
case LOC_BLOCK:
VALUE_ADDRESS (v) = BLOCK_START (SYMBOL_BLOCK_VALUE (var));
return v;
case LOC_REGISTER:
+ case LOC_REGPARM:
+ case LOC_REGPARM_ADDR:
{
- char raw_buffer[MAX_REGISTER_RAW_SIZE];
- char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE];
+ struct block *b;
- VALUE_REGNO (v) = val;
+ if (frame == NULL)
+ return 0;
+ b = get_frame_block (frame);
+
- /* Locate the register's contents in a real register or in core;
- read the data in raw format. */
-
- addr = find_saved_register (frame, val);
- if (addr == 0)
+ if (SYMBOL_CLASS (var) == LOC_REGPARM_ADDR)
{
- /* Value is really in a register. */
-
- VALUE_LVAL (v) = lval_register;
- VALUE_ADDRESS (v) = REGISTER_BYTE (val);
-
- read_register_bytes (REGISTER_BYTE (val),
- raw_buffer, REGISTER_RAW_SIZE (val));
+ addr =
+ value_as_pointer (value_from_register (lookup_pointer_type (type),
+ SYMBOL_VALUE (var),
+ frame));
+ VALUE_LVAL (v) = lval_memory;
}
else
- {
- /* Value was in a register that has been saved in memory. */
+ return value_from_register (type, SYMBOL_VALUE (var), frame);
+ }
+ break;
- read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (val));
- VALUE_ADDRESS (v) = addr;
- }
+ case LOC_OPTIMIZED_OUT:
+ VALUE_LVAL (v) = not_lval;
+ VALUE_OPTIMIZED_OUT (v) = 1;
+ return v;
- /* Convert the raw contents to virtual contents.
- (Just copy them if the formats are the same.) */
+ default:
+ error ("Cannot look up value of a botched symbol.");
+ break;
+ }
- REGISTER_CONVERT_TO_VIRTUAL (val, raw_buffer, virtual_buffer);
+ VALUE_ADDRESS (v) = addr;
+ VALUE_LAZY (v) = 1;
+ return v;
+}
- if (REGISTER_CONVERTIBLE (val))
- {
- /* When the raw and virtual formats differ, the virtual format
- corresponds to a specific data type. If we want that type,
- copy the data into the value.
- Otherwise, do a type-conversion. */
+/* Return a value of type TYPE, stored in register REGNUM, in frame
+ FRAME. */
- if (type != REGISTER_VIRTUAL_TYPE (val))
+value_ptr
+value_from_register (type, regnum, frame)
+ struct type *type;
+ int regnum;
+ struct frame_info *frame;
+{
+ char raw_buffer [MAX_REGISTER_RAW_SIZE];
+ CORE_ADDR addr;
+ int optim;
+ value_ptr v = allocate_value (type);
+ int len = TYPE_LENGTH (type);
+ char *value_bytes = 0;
+ int value_bytes_copied = 0;
+ int num_storage_locs;
+ enum lval_type lval;
+
+ VALUE_REGNO (v) = regnum;
+
+ num_storage_locs = (len > REGISTER_VIRTUAL_SIZE (regnum) ?
+ ((len - 1) / REGISTER_RAW_SIZE (regnum)) + 1 :
+ 1);
+
+ if (num_storage_locs > 1
+#ifdef GDB_TARGET_IS_H8500
+ || TYPE_CODE (type) == TYPE_CODE_PTR
+#endif
+ )
+ {
+ /* Value spread across multiple storage locations. */
+
+ int local_regnum;
+ int mem_stor = 0, reg_stor = 0;
+ int mem_tracking = 1;
+ CORE_ADDR last_addr = 0;
+ CORE_ADDR first_addr = 0;
+
+ value_bytes = (char *) alloca (len + MAX_REGISTER_RAW_SIZE);
+
+ /* Copy all of the data out, whereever it may be. */
+
+#ifdef GDB_TARGET_IS_H8500
+/* This piece of hideosity is required because the H8500 treats registers
+ differently depending upon whether they are used as pointers or not. As a
+ pointer, a register needs to have a page register tacked onto the front.
+ An alternate way to do this would be to have gcc output different register
+ numbers for the pointer & non-pointer form of the register. But, it
+ doesn't, so we're stuck with this. */
+
+ if (TYPE_CODE (type) == TYPE_CODE_PTR
+ && len > 2)
+ {
+ int page_regnum;
+
+ switch (regnum)
+ {
+ case R0_REGNUM: case R1_REGNUM: case R2_REGNUM: case R3_REGNUM:
+ page_regnum = SEG_D_REGNUM;
+ break;
+ case R4_REGNUM: case R5_REGNUM:
+ page_regnum = SEG_E_REGNUM;
+ break;
+ case R6_REGNUM: case R7_REGNUM:
+ page_regnum = SEG_T_REGNUM;
+ break;
+ }
+
+ value_bytes[0] = 0;
+ get_saved_register (value_bytes + 1,
+ &optim,
+ &addr,
+ frame,
+ page_regnum,
+ &lval);
+
+ if (lval == lval_register)
+ reg_stor++;
+ else
+ mem_stor++;
+ first_addr = addr;
+ last_addr = addr;
+
+ get_saved_register (value_bytes + 2,
+ &optim,
+ &addr,
+ frame,
+ regnum,
+ &lval);
+
+ if (lval == lval_register)
+ reg_stor++;
+ else
+ {
+ mem_stor++;
+ mem_tracking = mem_tracking && (addr == last_addr);
+ }
+ last_addr = addr;
+ }
+ else
+#endif /* GDB_TARGET_IS_H8500 */
+ for (local_regnum = regnum;
+ value_bytes_copied < len;
+ (value_bytes_copied += REGISTER_RAW_SIZE (local_regnum),
+ ++local_regnum))
+ {
+ get_saved_register (value_bytes + value_bytes_copied,
+ &optim,
+ &addr,
+ frame,
+ local_regnum,
+ &lval);
+
+ if (regnum == local_regnum)
+ first_addr = addr;
+ if (lval == lval_register)
+ reg_stor++;
+ else
{
- /* eg a variable of type `float' in a 68881 register
- with raw type `extended' and virtual type `double'.
- Fetch it as a `double' and then convert to `float'. */
- v = allocate_value (REGISTER_VIRTUAL_TYPE (val));
- bcopy (virtual_buffer, VALUE_CONTENTS (v), len);
- v = value_cast (type, v);
+ mem_stor++;
+
+ mem_tracking =
+ (mem_tracking
+ && (regnum == local_regnum
+ || addr == last_addr));
}
- else
- bcopy (virtual_buffer, VALUE_CONTENTS (v), len);
+ last_addr = addr;
}
- else
- {
- /* Raw and virtual formats are the same for this register. */
- union { int i; char c; } test;
- /* If we want less than the full size, we need to
- test for a big-endian or little-endian machine. */
- test.i = 1;
- if (test.c != 1 && len < REGISTER_RAW_SIZE (val))
- {
- /* Big-endian, and we want less than full size. */
- VALUE_OFFSET (v) = REGISTER_RAW_SIZE (val) - len;
- }
+ if ((reg_stor && mem_stor)
+ || (mem_stor && !mem_tracking))
+ /* Mixed storage; all of the hassle we just went through was
+ for some good purpose. */
+ {
+ VALUE_LVAL (v) = lval_reg_frame_relative;
+ VALUE_FRAME (v) = FRAME_FP (frame);
+ VALUE_FRAME_REGNUM (v) = regnum;
+ }
+ else if (mem_stor)
+ {
+ VALUE_LVAL (v) = lval_memory;
+ VALUE_ADDRESS (v) = first_addr;
+ }
+ else if (reg_stor)
+ {
+ VALUE_LVAL (v) = lval_register;
+ VALUE_ADDRESS (v) = first_addr;
+ }
+ else
+ fatal ("value_from_register: Value not stored anywhere!");
- bcopy (virtual_buffer + VALUE_OFFSET (v),
- VALUE_CONTENTS (v), len);
- }
+ VALUE_OPTIMIZED_OUT (v) = optim;
- return v;
- }
+ /* Any structure stored in more than one register will always be
+ an integral number of registers. Otherwise, you'd need to do
+ some fiddling with the last register copied here for little
+ endian machines. */
+
+ /* Copy into the contents section of the value. */
+ memcpy (VALUE_CONTENTS_RAW (v), value_bytes, len);
+
+ /* Finally do any conversion necessary when extracting this
+ type from more than one register. */
+#ifdef REGISTER_CONVERT_TO_TYPE
+ REGISTER_CONVERT_TO_TYPE(regnum, type, VALUE_CONTENTS_RAW(v));
+#endif
+ return v;
}
- read_memory (addr, VALUE_CONTENTS (v), len);
+ /* Data is completely contained within a single register. Locate the
+ register's contents in a real register or in core;
+ read the data in raw format. */
+
+ get_saved_register (raw_buffer, &optim, &addr, frame, regnum, &lval);
+ VALUE_OPTIMIZED_OUT (v) = optim;
+ VALUE_LVAL (v) = lval;
VALUE_ADDRESS (v) = addr;
+
+ /* Convert raw data to virtual format if necessary. */
+
+#ifdef REGISTER_CONVERTIBLE
+ if (REGISTER_CONVERTIBLE (regnum))
+ {
+ REGISTER_CONVERT_TO_VIRTUAL (regnum, type,
+ raw_buffer, VALUE_CONTENTS_RAW (v));
+ }
+ else
+#endif
+ {
+ /* Raw and virtual formats are the same for this register. */
+
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN && len < REGISTER_RAW_SIZE (regnum))
+ {
+ /* Big-endian, and we want less than full size. */
+ VALUE_OFFSET (v) = REGISTER_RAW_SIZE (regnum) - len;
+ }
+
+ memcpy (VALUE_CONTENTS_RAW (v), raw_buffer + VALUE_OFFSET (v), len);
+ }
+
return v;
}
\f
-/* Given a struct symbol for a variable,
- and a stack frame address,
- return a (pointer to a) struct value containing the variable's address. */
+/* Given a struct symbol for a variable or function,
+ and a stack frame id,
+ return a (pointer to a) struct value containing the properly typed
+ address. */
-value
+value_ptr
locate_var_value (var, frame)
register struct symbol *var;
- FRAME frame;
+ struct frame_info *frame;
{
- register CORE_ADDR addr = 0;
- int val = SYMBOL_VALUE (var);
- struct frame_info fi;
+ CORE_ADDR addr = 0;
struct type *type = SYMBOL_TYPE (var);
+ value_ptr lazy_value;
- if (frame == 0) frame = selected_frame;
+ /* Evaluate it first; if the result is a memory address, we're fine.
+ Lazy evaluation pays off here. */
- switch (SYMBOL_CLASS (var))
+ lazy_value = read_var_value (var, frame);
+ if (lazy_value == 0)
+ error ("Address of \"%s\" is unknown.", SYMBOL_SOURCE_NAME (var));
+
+ if (VALUE_LAZY (lazy_value)
+ || TYPE_CODE (type) == TYPE_CODE_FUNC)
{
- case LOC_CONST:
- case LOC_CONST_BYTES:
- error ("Address requested for identifier \"%s\" which is a constant.",
- SYMBOL_NAME (var));
+ addr = VALUE_ADDRESS (lazy_value);
+ return value_from_longest (lookup_pointer_type (type), (LONGEST) addr);
+ }
- case LOC_REGISTER:
- addr = find_saved_register (frame, val);
- if (addr != 0)
- {
- union { int i; char c; } test;
- int len = TYPE_LENGTH (type);
- /* If var is less than the full size of register, we need to
- test for a big-endian or little-endian machine. */
- test.i = 1;
- if (test.c != 1 && len < REGISTER_RAW_SIZE (val))
- /* Big-endian, and we want less than full size. */
- addr += REGISTER_RAW_SIZE (val) - len;
- break;
- }
+ /* Not a memory address; check what the problem was. */
+ switch (VALUE_LVAL (lazy_value))
+ {
+ case lval_register:
+ case lval_reg_frame_relative:
error ("Address requested for identifier \"%s\" which is in a register.",
- SYMBOL_NAME (var));
-
- case LOC_STATIC:
- case LOC_LABEL:
- addr = val;
+ SYMBOL_SOURCE_NAME (var));
break;
- case LOC_ARG:
- fi = get_frame_info (frame);
- addr = val + FRAME_ARGS_ADDRESS (fi);
- break;
-
- case LOC_LOCAL:
- fi = get_frame_info (frame);
- addr = val + FRAME_LOCALS_ADDRESS (fi);
- break;
-
- case LOC_TYPEDEF:
- error ("Address requested for identifier \"%s\" which is a typedef.",
- SYMBOL_NAME (var));
-
- case LOC_BLOCK:
- addr = BLOCK_START (SYMBOL_BLOCK_VALUE (var));
+ default:
+ error ("Can't take address of \"%s\" which isn't an lvalue.",
+ SYMBOL_SOURCE_NAME (var));
break;
}
-
- return value_cast (lookup_pointer_type (type),
- value_from_long (builtin_type_long, addr));
+ return 0; /* For lint -- never reached */
}
-
-static
-initialize ()
-{}
-
-END_FILE
projects / deliverable / binutils-gdb.git / blobdiff