/* Definitions to make GDB run on a mips box under 4.3bsd.
- Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
- Contributed by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin
- and by Alessandro Forin(af@cs.cmu.edu) at CMU
+ Copyright (C) 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
+ Contributed by Per Bothner (bothner@cs.wisc.edu) at U.Wisconsin
+ and by Alessandro Forin (af@cs.cmu.edu) at CMU.
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"
+
#if !defined (TARGET_BYTE_ORDER)
#define TARGET_BYTE_ORDER LITTLE_ENDIAN
#endif
+/* FIXME, this triggers host-and-target (``native'') dependent code
+ which currently sits in mips-xdep.c. Needs to be moved out to
+ mips-nat.c or some such. */
+#define GDB_TARGET_IS_MIPS
+
/* Floating point is IEEE compliant */
#define IEEE_FLOAT
/*#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
-
/* Offset from address of function to start of its code.
Zero on most machines. */
/* Number of machine registers */
-#define NUM_REGS 73
+#define NUM_REGS 80
/* Initializer for an array of names of registers.
There should be NUM_REGS strings in this initializer. */
"t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra", \
"sr", "lo", "hi", "bad", "cause","pc", \
"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
- "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
- "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",\
- "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",\
- "fsr", "fir", "fp" \
+ "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
+ "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",\
+ "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",\
+ "fsr", "fir", "fp", "inx", "rand", "tlblo","ctxt", "tlbhi",\
+ "epc", "prid"\
}
/* Register numbers of various important registers.
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 ZERO_REGNUM 0 /* read-only register, always 0 */
+#define A0_REGNUM 4 /* Loc of first arg during a subr call */
#define SP_REGNUM 29 /* Contains address of top of stack */
-#define PC_REGNUM 37 /* Contains program counter */
#define RA_REGNUM 31 /* Contains return address value */
#define PS_REGNUM 32 /* Contains processor status */
#define HI_REGNUM 34 /* Multiple/divide temp */
#define LO_REGNUM 33 /* ... */
+#define BADVADDR_REGNUM 35 /* bad vaddr for addressing exception */
+#define CAUSE_REGNUM 36 /* describes last exception */
+#define PC_REGNUM 37 /* Contains program counter */
#define FP0_REGNUM 38 /* Floating point register 0 (single float) */
#define FCRCS_REGNUM 70 /* FP control/status */
#define FCRIR_REGNUM 71 /* FP implementation/revision */
#define FP_REGNUM 72 /* Pseudo register that contains true address of executing stack frame */
+#define FIRST_EMBED_REGNUM 73 /* First supervisor register for embedded use */
+#define LAST_EMBED_REGNUM 79 /* Last one */
/* Define DO_REGISTERS_INFO() to do machine-specific formatting
of register dumps. */
/* Return the GDB type object for the "standard" data type
of data in register N. */
-#define REGISTER_VIRTUAL_TYPE(N) builtin_type_int
+#define REGISTER_VIRTUAL_TYPE(N) \
+ (((N) >= FP0_REGNUM && (N) < FP0_REGNUM+32) \
+ ? builtin_type_float : builtin_type_int) \
+
/* Store the address of the place in which to copy the structure the
subroutine will return. This is called from call_function. */
(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. */
(((int*)dummyname)[11] |= (((unsigned long)(fun)) >> 16), \
((int*)dummyname)[12] |= (unsigned short)(fun))
+/* There's a mess in stack frame creation. See comments in blockframe.c
+ near reference to INIT_FRAME_PC_FIRST. */
+
+#define INIT_FRAME_PC(fromleaf, prev) /* nada */
+
+#define INIT_FRAME_PC_FIRST(fromleaf, prev) \
+ (prev)->pc = ((fromleaf) ? SAVED_PC_AFTER_CALL ((prev)->next) : \
+ (prev)->next ? FRAME_SAVED_PC ((prev)->next) : read_pc ());
+
/* Specific information about a procedure.
This overlays the MIPS's PDR records,
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)
+
+#define PRINT_EXTRA_FRAME_INFO(fi) \
+ { \
+ if (fi && fi->proc_desc && fi->proc_desc->pdr.framereg < NUM_REGS) \
+ printf_filtered (" frame pointer is at %s+%d\n", \
+ reg_names[fi->proc_desc->pdr.framereg], \
+ fi->proc_desc->pdr.frameoffset); \
+ }
+
+/* It takes two values to specify a frame (at least!) on the MIPS. Sigh.
+
+ In fact, at the moment, the *PC* is the primary value that sets up
+ a frame. The PC is looked up to see what function it's in; symbol
+ information from that function tells us which register is the frame
+ pointer base, and what offset from there is the "virtual frame pointer".
+ (This is usually an offset from SP.) FIXME -- this should be cleaned
+ up so that the primary value is the SP, and the PC is used to disambiguate
+ multiple functions with the same SP that are at different stack levels. */
+#define FRAME_SPECIFICATION_DYADIC
+
+#define STAB_REG_TO_REGNUM(num) ((num) < 32 ? (num) : (num)+FP0_REGNUM-32)
+
+/* 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)
projects / deliverable / binutils-gdb.git / blobdiff