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/* GNU/Linux on ARM target support.
Copyright 1999, 2000 Free Software Foundation, Inc.
This file is part of GDB.
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.
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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "symtab.h"
#include "gdbtypes.h"
#ifdef GET_LONGJMP_TARGET
/* Figure out where the longjmp will land. We expect that we have
just entered longjmp and haven't yet altered r0, r1, so the
arguments are still in the registers. (A1_REGNUM) points at the
jmp_buf structure from which we extract the pc (JB_PC) that we will
land at. The pc is copied into ADDR. This routine returns true on
success. */
#define LONGJMP_TARGET_SIZE sizeof(int)
#define JB_ELEMENT_SIZE sizeof(int)
#define JB_SL 18
#define JB_FP 19
#define JB_SP 20
#define JB_PC 21
int
arm_get_longjmp_target (CORE_ADDR * pc)
{
CORE_ADDR jb_addr;
char buf[LONGJMP_TARGET_SIZE];
jb_addr = read_register (A1_REGNUM);
if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
LONGJMP_TARGET_SIZE))
return 0;
*pc = extract_address (buf, LONGJMP_TARGET_SIZE);
return 1;
}
#endif /* GET_LONGJMP_TARGET */
/* Extract from an array REGBUF containing the (raw) register state
a function return value of type TYPE, and copy that, in virtual format,
into VALBUF. */
void
arm_linux_extract_return_value (struct type *type,
char regbuf[REGISTER_BYTES],
char *valbuf)
{
/* ScottB: This needs to be looked at to handle the different
floating point emulators on ARM Linux. Right now the code
assumes that fetch inferior registers does the right thing for
GDB. I suspect this won't handle NWFPE registers correctly, nor
will the default ARM version (arm_extract_return_value()). */
int regnum = (TYPE_CODE_FLT == TYPE_CODE (type)) ? F0_REGNUM : A1_REGNUM;
memcpy (valbuf, ®buf[REGISTER_BYTE (regnum)], TYPE_LENGTH (type));
}
void
_initialize_arm_linux_tdep (void)
{
}
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