-/* Sequent Symmetry target interface, for GDB when running under Unix.
- Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
+/* Sequent Symmetry target interface, for GDB.
+ Copyright (C) 1986, 1987, 1989, 1991, 1994 Free Software Foundation, Inc.
This file is part of GDB.
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. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* many 387-specific items of use taken from i386-dep.c */
#include <sys/user.h>
#include <sys/dir.h>
#include <sys/ioctl.h>
-#include <sys/stat.h>
+#include "gdb_stat.h"
#include "gdbcore.h"
#include <fcntl.h>
-static long i386_get_frame_setup ();
-static i386_follow_jump ();
-
-#include <sgtty.h>
-#define TERMINAL struct sgttyb
-
-/* rounds 'one' up to divide evenly by 'two' */
-
-int
-round(one,two)
-register int one, two;
-
-{
- register int temp;
- temp = (one/two)*two;
- if (one != temp) {
- temp += two;
- }
- return temp;
-}
-
-
-static CORE_ADDR codestream_next_addr;
-static CORE_ADDR codestream_addr;
-static unsigned char codestream_buf[sizeof (int)];
-static int codestream_off;
-static int codestream_cnt;
-
-#define codestream_tell() (codestream_addr + codestream_off)
-#define codestream_peek() (codestream_cnt == 0 ? \
- codestream_fill(1): codestream_buf[codestream_off])
-#define codestream_get() (codestream_cnt-- == 0 ? \
- codestream_fill(0) : codestream_buf[codestream_off++])
-
-
-static unsigned char
-codestream_fill (peek_flag)
-{
- codestream_addr = codestream_next_addr;
- codestream_next_addr += sizeof (int);
- codestream_off = 0;
- codestream_cnt = sizeof (int);
- read_memory (codestream_addr,
- (unsigned char *)codestream_buf,
- sizeof (int));
-
- if (peek_flag)
- return (codestream_peek());
- else
- return (codestream_get());
-}
-
-static void
-codestream_seek (place)
-{
- codestream_next_addr = place & -sizeof (int);
- codestream_cnt = 0;
- codestream_fill (1);
- while (codestream_tell() != place)
- codestream_get ();
-}
-
-static void
-codestream_read (buf, count)
- unsigned char *buf;
-{
- unsigned char *p;
- int i;
- p = buf;
- for (i = 0; i < count; i++)
- *p++ = codestream_get ();
-}
-
-/*
- * Following macro translates i386 opcode register numbers to Symmetry
- * register numbers. This is used by FRAME_FIND_SAVED_REGS.
- *
- * %eax %ecx %edx %ebx %esp %ebp %esi %edi
- * i386 0 1 2 3 4 5 6 7
- * Symmetry 0 2 1 5 14 15 6 7
- *
- */
-#define I386_REGNO_TO_SYMMETRY(n) \
-((n)==0?0 :(n)==1?2 :(n)==2?1 :(n)==3?5 :(n)==4?14 :(n)==5?15 :(n))
-
-/* from i386-dep.c */
-i386_frame_find_saved_regs (fip, fsrp)
- struct frame_info *fip;
- struct frame_saved_regs *fsrp;
-{
- unsigned long locals;
- unsigned char *p;
- unsigned char op;
- CORE_ADDR dummy_bottom;
- CORE_ADDR adr;
- int i;
-
- memset (fsrp, 0, sizeof *fsrp);
-
- /* if frame is the end of a dummy, compute where the
- * beginning would be
- */
- dummy_bottom = fip->frame - 4 - NUM_REGS*4 - CALL_DUMMY_LENGTH;
-
- /* check if the PC is in the stack, in a dummy frame */
- if (dummy_bottom <= fip->pc && fip->pc <= fip->frame)
- {
- /* all regs were saved by push_call_dummy () */
- adr = fip->frame - 4;
- for (i = 0; i < NUM_REGS; i++)
- {
- fsrp->regs[i] = adr;
- adr -= 4;
- }
- return;
- }
-
- locals = i386_get_frame_setup (get_pc_function_start (fip->pc));
-
- if (locals >= 0)
- {
- adr = fip->frame - 4 - locals;
- for (i = 0; i < 8; i++)
- {
- op = codestream_get ();
- if (op < 0x50 || op > 0x57)
- break;
- fsrp->regs[I386_REGNO_TO_SYMMETRY(op - 0x50)] = adr;
- adr -= 4;
- }
- }
-
- fsrp->regs[PC_REGNUM] = fip->frame + 4;
- fsrp->regs[FP_REGNUM] = fip->frame;
-}
-
-static long
-i386_get_frame_setup (pc)
-{
- unsigned char op;
-
- codestream_seek (pc);
-
- i386_follow_jump ();
-
- op = codestream_get ();
-
- if (op == 0x58) /* popl %eax */
- {
- /*
- * this function must start with
- *
- * popl %eax 0x58
- * xchgl %eax, (%esp) 0x87 0x04 0x24
- * or xchgl %eax, 0(%esp) 0x87 0x44 0x24 0x00
- *
- * (the system 5 compiler puts out the second xchg
- * inst, and the assembler doesn't try to optimize it,
- * so the 'sib' form gets generated)
- *
- * this sequence is used to get the address of the return
- * buffer for a function that returns a structure
- */
- int pos;
- unsigned char buf[4];
- static unsigned char proto1[3] = { 0x87,0x04,0x24 };
- static unsigned char proto2[4] = { 0x87,0x44,0x24,0x00 };
- pos = codestream_tell ();
- codestream_read (buf, 4);
- if (memcmp (buf, proto1, 3) == 0)
- pos += 3;
- else if (memcmp (buf, proto2, 4) == 0)
- pos += 4;
-
- codestream_seek (pos);
- op = codestream_get (); /* update next opcode */
- }
-
- if (op == 0x55) /* pushl %esp */
- {
- if (codestream_get () != 0x8b) /* movl %esp, %ebp (2bytes) */
- return (-1);
- if (codestream_get () != 0xec)
- return (-1);
- /*
- * check for stack adjustment
- *
- * subl $XXX, %esp
- *
- * note: you can't subtract a 16 bit immediate
- * from a 32 bit reg, so we don't have to worry
- * about a data16 prefix
- */
- op = codestream_peek ();
- if (op == 0x83) /* subl with 8 bit immed */
- {
- codestream_get ();
- if (codestream_get () != 0xec)
- return (-1);
- /* subl with signed byte immediate
- * (though it wouldn't make sense to be negative)
- */
- return (codestream_get());
- }
- else if (op == 0x81) /* subl with 32 bit immed */
- {
- int locals;
- if (codestream_get () != 0xec)
- return (-1);
- /* subl with 32 bit immediate */
- codestream_read ((unsigned char *)&locals, 4);
- return (locals);
- }
- else
- {
- return (0);
- }
- }
- else if (op == 0xc8)
- {
- /* enter instruction: arg is 16 unsigned immed */
- unsigned short slocals;
- codestream_read ((unsigned char *)&slocals, 2);
- codestream_get (); /* flush final byte of enter instruction */
- return (slocals);
- }
- return (-1);
-}
-
-/* next instruction is a jump, move to target */
-static
-i386_follow_jump ()
-{
- int long_delta;
- short short_delta;
- char byte_delta;
- int data16;
- int pos;
-
- pos = codestream_tell ();
-
- data16 = 0;
- if (codestream_peek () == 0x66)
- {
- codestream_get ();
- data16 = 1;
- }
-
- switch (codestream_get ())
- {
- case 0xe9:
- /* relative jump: if data16 == 0, disp32, else disp16 */
- if (data16)
- {
- codestream_read ((unsigned char *)&short_delta, 2);
- pos += short_delta + 3; /* include size of jmp inst */
- }
- else
- {
- codestream_read ((unsigned char *)&long_delta, 4);
- pos += long_delta + 5;
- }
- break;
- case 0xeb:
- /* relative jump, disp8 (ignore data16) */
- codestream_read ((unsigned char *)&byte_delta, 1);
- pos += byte_delta + 2;
- break;
- }
- codestream_seek (pos + data16);
-}
-
-/* return pc of first real instruction */
-/* from i386-dep.c */
-
-i386_skip_prologue (pc)
-{
- unsigned char op;
- int i;
-
- if (i386_get_frame_setup (pc) < 0)
- return (pc);
-
- /* found valid frame setup - codestream now points to
- * start of push instructions for saving registers
- */
-
- /* skip over register saves */
- for (i = 0; i < 8; i++)
- {
- op = codestream_peek ();
- /* break if not pushl inst */
- if (op < 0x50 || op > 0x57)
- break;
- codestream_get ();
- }
-
- i386_follow_jump ();
-
- return (codestream_tell ());
-}
-
void
symmetry_extract_return_value(type, regbuf, valbuf)
struct type *type;
float f;
if (TYPE_CODE_FLT == TYPE_CODE(type)) {
- msymbol = lookup_minimal_symbol ("1167_flt", (struct objfile *) NULL);
+ msymbol = lookup_minimal_symbol ("1167_flt", NULL, NULL);
if (msymbol != NULL) {
/* found "1167_flt" means 1167, %fp2-%fp3 */
/* float & double; 19= %fp2, 20= %fp3 */
memcpy (valbuf, regbuf, TYPE_LENGTH (type));
}
}
-
-#ifdef _SEQUENT_ /* ptx, not dynix */
-/*
- * Convert compiler register number to gdb internal
- * register number. The PTX C compiler only really
- * puts things in %edi, %esi and %ebx, but it can't hurt
- * to be complete here.
- */
-int
-ptx_coff_regno_to_gdb(regno)
- int regno;
-{
- return I386_REGNO_TO_SYMMETRY(regno);
-}
-
-/* For ptx, the value in blockend will be meaningless. This function
- merely returns the proper offset given the register number. This
- is much easier, because under ptx, the upage is set up with the
- user struct on "top", and the registers "beneath" it (and thus defines
- TRAD_CORE_USER_OFFSET in bfd). */
-
-/* The following table is for ptx 1.3. In theory it should not change with
- the OS version, but if it does we should (if possible) figure out a way
- to accept both the old and the new formats. */
-
-static unsigned int reg_offsets[NUM_REGS] = {
-/*
- * u.u_ar0 = 0xfffff8d0
- * VA_UBLOCK = 0xffffe000
- * VA_UAREA = 0xfffff8e8
- * struct user at ublock offset 0x18e8
- * registers at ublock offset 0x18d0
- */
-0x18d0, /* eax */
-0x18c8, /* eax */
-0x18cc, /* eax */
-0x1be0, /* st0 */
-0x1bea, /* st1 */
-0x18c4, /* ebx */
-0x18b8, /* esi */
-0x18b4, /* edi */
-0x1bf4, /* st2 */
-0x1bfe, /* st3 */
-0x1c08, /* st4 */
-0x1c12, /* st5 */
-0x1c1c, /* st6 */
-0x1c26, /* st7 */
-0x18e0, /* esp */
-0x18bc, /* ebp */
-0x18d4, /* eip */
-0x18dc, /* flags */
-0x1c38, /* fp1 */
-0x1c3c, /* fp2 */
-0x1c40, /* fp3 */
-0x1c44, /* fp4 */
-0x1c48, /* fp5 */
-0x1c4c, /* fp6 */
-0x1c50, /* fp7 */
-0x1c54, /* fp8 */
-0x1c58, /* fp9 */
-0x1c5c, /* fp10 */
-0x1c60, /* fp11 */
-0x1c64, /* fp12 */
-0x1c68, /* fp13 */
-0x1c6c, /* fp14 */
-0x1c70, /* fp15 */
-0x1c74, /* fp16 */
-0x1c78, /* fp17 */
-0x1c7c, /* fp18 */
-0x1c80, /* fp19 */
-0x1c84, /* fp20 */
-0x1c88, /* fp21 */
-0x1c8c, /* fp22 */
-0x1c90, /* fp23 */
-0x1c94, /* fp24 */
-0x1c98, /* fp25 */
-0x1c9c, /* fp26 */
-0x1ca0, /* fp27 */
-0x1ca4, /* fp28 */
-0x1ca8, /* fp29 */
-0x1cac, /* fp30 */
-0x1cb0, /* fp31 */
-};
-
-unsigned int
-register_addr (regno, blockend)
- int regno, blockend;
-{
- if ((regno < 0) || (regno >= NUM_REGS)) {
- error("Invalid register number %d.", regno);
- }
- return reg_offsets[regno];
-}
-#endif /* _SEQUENT_ */
projects / deliverable / binutils-gdb.git / blobdiff