-/* Copyright (C) 1990 Free Software Foundation, Inc.
+/* Target machine description for SGI Iris under Irix, for GDB.
+ Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
This file is part of GDB.
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+#include "coff/sym.h" /* Needed for PDR below. */
+#include "coff/symconst.h"
+
#define TARGET_BYTE_ORDER BIG_ENDIAN
/* Floating point is IEEE compliant */
/*#define NAMES_HAVE_UNDERSCORE*/
-/* Debugger information will be in mips' format */
-
-#define READ_MIPS_FORMAT
-
-/* File format is coff, but with additions */
-
-#define COFF_FORMAT
+/* SGI's assembler doesn't grok dollar signs in identifiers.
+ So we use dots instead. This item must be coordinated with G++. */
+#undef CPLUS_MARKER
+#define CPLUS_MARKER '.'
/* Offset from address of function to start of its code.
Zero on most machines. */
to be actual register numbers as far as the user is concerned
but do serve to get the desired values when passed to read_register. */
+#define A0_REGNUM 4 /* Loc of first arg during a subr call */
#define SP_REGNUM 29 /* Contains address of top of stack */
#define FP_REGNUM 30 /* Pseudo register that contains true address of executing stack frame */
#define RA_REGNUM 31 /* Contains return address value */
(its caller). */
/* FRAME_CHAIN takes a frame's nominal address
- and produces the frame's chain-pointer.
-
- FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
- and produces the nominal address of the caller frame.
-
- However, if FRAME_CHAIN_VALID returns zero,
- it means the given frame is the outermost one and has no caller.
- In that case, FRAME_CHAIN_COMBINE is not used. */
+ and produces the frame's chain-pointer. */
#define FRAME_CHAIN(thisframe) (FRAME_ADDR)mips_frame_chain(thisframe)
-#define FRAME_CHAIN_VALID(chain, thisframe) \
- (chain != 0 && (outside_startup_file (FRAME_SAVED_PC (thisframe))))
-
-#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
-
/* Define other aspects of the stack frame. */
mipsread.c (ab)uses this to save memory */
typedef struct mips_extra_func_info {
- unsigned long adr; /* memory address of start of procedure */
- long isym; /* pointer to procedure symbol */
- long pad2; /* iline: start of line number entries*/
- long regmask; /* save register mask */
- long regoffset; /* save register offset */
long numargs; /* number of args to procedure (was iopt) */
- long fregmask; /* save floating point register mask */
- long fregoffset; /* save floating point register offset */
- long framesize; /* frameoffset: frame size */
- short framereg; /* frame pointer register */
- short pcreg; /* offset or reg of return pc */
- long lnLow; /* lowest line in the procedure */
- long lnHigh; /* highest line in the procedure */
- long pad3; /* cbLineOffset: byte offset for this procedure from the fd base */
+ PDR pdr; /* Procedure descriptor record */
} *mips_extra_func_info_t;
#define EXTRA_FRAME_INFO \
- char *proc_desc; /* actually, a mips_extra_func_info_t */\
+ mips_extra_func_info_t proc_desc; \
int num_args;\
struct frame_saved_regs *saved_regs;
#define INIT_EXTRA_FRAME_INFO(fromleaf, fci) init_extra_frame_info(fci)
+
+/* Size of elements in jmpbuf */
+
+#define JB_ELEMENT_SIZE 4
+
+/* Figure out where the longjmp will land. We expect that we have just entered
+ longjmp and haven't yet setup the stack frame, so the args are still in the
+ argument regs. a0 (CALL_ARG0) 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 */
+
+/* Note that caller must #include <setjmp.h> in order to get def of JB_* */
+#define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)