#include "symtab.h"
#include "setjmp.h"
#include "value.h"
+#include "ieee-float.h" /* for ext_format & friends */
/* Size of an instruction */
#define BYTES_PER_88K_INSN 4
void frame_find_saved_regs ();
+/* is this target an m88110? Otherwise assume m88100. This has
+ relevance for the ways in which we screw with instruction pointers. */
+int target_is_m88110 = 0;
+
+/* FIXME: this is really just a guess based on m88110 being big
+ endian. */
+const struct ext_format ext_format_m88110 = {
+/* tot sbyte smask expbyte manbyte */
+ 10, 0, 0x80, 0,1, 4,8 /* m88110 */
+};
/* Given a GDB frame, determine the address of the calling function's frame.
This will be used to create a new GDB frame struct, and then
static struct pic_prologue_code pic_prologue_code [] = {
/* FIXME -- until this is translated to hex, we won't match it... */
- 0xffffffff, 0,
+ { 0xffffffff, 0 },
/* or r10,r1,0 (if not saved) */
/* bsr.n LabN */
/* or.u r25,r0,const */
unsigned long *pword1;
CORE_ADDR memaddr;
{
- unsigned long buf[1];
-
*pword1 = read_memory_integer (memaddr, BYTES_PER_88K_INSN);
return memaddr + BYTES_PER_88K_INSN;
}
/* (we hope...) */
if (fsr->regs[SP_REGNUM] != 0
&& fsr->regs[SP_REGNUM] != frame_sp - sp_offset)
- fprintf(stderr, "Bad saved SP value %x != %x, offset %x!\n",
+ fprintf_unfiltered(gdb_stderr, "Bad saved SP value %x != %x, offset %x!\n",
fsr->regs[SP_REGNUM],
frame_sp - sp_offset, sp_offset);
struct frame_info *fi;
struct frame_saved_regs *fsr;
{
- register CORE_ADDR next_addr;
- register CORE_ADDR *saved_regs;
- register int regnum;
register struct frame_saved_regs *cache_fsr;
extern struct obstack frame_cache_obstack;
CORE_ADDR ip;
frame_locals_address (fi)
struct frame_info *fi;
{
- register FRAME frame;
struct frame_saved_regs fsr;
- CORE_ADDR ap;
if (fi->args_pointer) /* Cached value is likely there. */
return fi->args_pointer;
frame_args_address (fi)
struct frame_info *fi;
{
- register FRAME frame;
struct frame_saved_regs fsr;
- CORE_ADDR ap;
if (fi->args_pointer) /* Cached value is likely there. */
return fi->args_pointer;
return read_next_frame_reg(frame, SRP_REGNUM);
}
-
+#if 0
+/* I believe this is all obsolete call dummy stuff. */
static int
pushed_size (prev_words, v)
int prev_words;
write_register (SP_REGNUM, rv_addr); /* push space onto the stack */
write_register (SRA_REGNUM, rv_addr);/* set return value register */
+ break;
}
+ default: break;
}
/* Here we make a pre-pass on the whole parameter list to figure out exactly
}
}
-void
-pop_frame ()
-{
- error ("Feature not implemented for the m88k yet.");
- return;
-}
-
void
collect_returned_value (rval, value_type, struct_return, nargs, args)
value *rval;
*rval = value_being_returned (value_type, retbuf, struct_return);
return;
}
+#endif /* 0 */
-#if 0
-/* Now handled in a machine independent way with CALL_DUMMY_LOCATION. */
- /* Stuff a breakpoint instruction onto the stack (or elsewhere if the stack
- is not a good place for it). Return the address at which the instruction
- got stuffed, or zero if we were unable to stuff it anywhere. */
+/*start of lines added by kev*/
+
+#define DUMMY_FRAME_SIZE 192
+
+static void
+write_word (sp, word)
+ CORE_ADDR sp;
+ unsigned LONGEST word;
+{
+ register int len = REGISTER_SIZE;
+ char buffer[MAX_REGISTER_RAW_SIZE];
+
+ store_unsigned_integer (buffer, len, word);
+ write_memory (sp, buffer, len);
+}
+
+void
+m88k_push_dummy_frame()
+{
+ register CORE_ADDR sp = read_register (SP_REGNUM);
+ register int rn;
+ int offset;
+
+ sp -= DUMMY_FRAME_SIZE; /* allocate a bunch of space */
+
+ for (rn = 0, offset = 0; rn <= SP_REGNUM; rn++, offset+=4)
+ write_word (sp+offset, read_register(rn));
-CORE_ADDR
-push_breakpoint ()
+ write_word (sp+offset, read_register (SXIP_REGNUM));
+ offset += 4;
+
+ write_word (sp+offset, read_register (SNIP_REGNUM));
+ offset += 4;
+
+ write_word (sp+offset, read_register (SFIP_REGNUM));
+ offset += 4;
+
+ write_word (sp+offset, read_register (PSR_REGNUM));
+ offset += 4;
+
+ write_word (sp+offset, read_register (FPSR_REGNUM));
+ offset += 4;
+
+ write_word (sp+offset, read_register (FPCR_REGNUM));
+ offset += 4;
+
+ write_register (SP_REGNUM, sp);
+ write_register (ACTUAL_FP_REGNUM, sp);
+}
+
+void
+pop_frame ()
{
- static char breakpoint_insn[] = BREAKPOINT;
- extern CORE_ADDR text_end; /* of inferior */
- static char readback_buffer[] = BREAKPOINT;
- int i;
-
- /* With a little bit of luck, we can just stash the breakpoint instruction
- in the word just beyond the end of normal text space. For systems on
- which the hardware will not allow us to execute out of the stack segment,
- we have to hope that we *are* at least allowed to effectively extend the
- text segment by one word. If the actual end of user's the text segment
- happens to fall right at a page boundary this trick may fail. Note that
- we check for this by reading after writing, and comparing in order to
- be sure that the write worked. */
+ register FRAME frame = get_current_frame ();
+ register CORE_ADDR fp;
+ register int regnum;
+ struct frame_saved_regs fsr;
+ struct frame_info *fi;
- write_memory (text_end, &breakpoint_insn, 4);
+ fi = get_frame_info (frame);
+ fp = fi -> frame;
+ get_frame_saved_regs (fi, &fsr);
- /* Fill the readback buffer with some garbage which is certain to be
- unequal to the breakpoint insn. That way we can tell if the
- following read doesn't actually succeed. */
+ if (PC_IN_CALL_DUMMY (read_pc(), read_register(SP_REGNUM), FRAME_FP(fi)))
+ {
+ /* FIXME: I think get_frame_saved_regs should be handling this so
+ that we can deal with the saved registers properly (e.g. frame
+ 1 is a call dummy, the user types "frame 2" and then "print $ps"). */
+ register CORE_ADDR sp = read_register (ACTUAL_FP_REGNUM);
+ int offset;
+
+ for (regnum = 0, offset = 0; regnum <= SP_REGNUM; regnum++, offset+=4)
+ (void) write_register (regnum, read_memory_integer (sp+offset, 4));
+
+ write_register (SXIP_REGNUM, read_memory_integer (sp+offset, 4));
+ offset += 4;
- for (i = 0; i < sizeof (readback_buffer); i++)
- readback_buffer[i] = ~ readback_buffer[i]; /* Invert the bits */
+ write_register (SNIP_REGNUM, read_memory_integer (sp+offset, 4));
+ offset += 4;
- /* Now check that the breakpoint insn was successfully installed. */
+ write_register (SFIP_REGNUM, read_memory_integer (sp+offset, 4));
+ offset += 4;
- read_memory (text_end, readback_buffer, sizeof (readback_buffer));
- for (i = 0; i < sizeof (readback_buffer); i++)
- if (readback_buffer[i] != breakpoint_insn[i])
- return 0; /* Failed to install! */
+ write_register (PSR_REGNUM, read_memory_integer (sp+offset, 4));
+ offset += 4;
- return text_end;
+ write_register (FPSR_REGNUM, read_memory_integer (sp+offset, 4));
+ offset += 4;
+
+ write_register (FPCR_REGNUM, read_memory_integer (sp+offset, 4));
+ offset += 4;
+
+ }
+ else
+ {
+ for (regnum = FP_REGNUM ; regnum > 0 ; regnum--)
+ if (fsr.regs[regnum])
+ write_register (regnum,
+ read_memory_integer (fsr.regs[regnum], 4));
+ write_pc(frame_saved_pc(frame));
+ }
+ reinit_frame_cache ();
}
-#endif
projects / deliverable / binutils-gdb.git / blobdiff