-/* Target-dependent code for the i860 for GDB, the GNU debugger.
- Copyright is unclear on this module!!!
- Copyright (C) 1992 Free Software Foundation, Inc.
- SVR4 and ELF/DWARF changes Contributed by Peggy Fieland (pfieland@stratus.com)
+/* Machine-dependent code which would otherwise be in inflow.c and core.c,
+ for GDB, the GNU debugger.
+ Copyright (C) 1986, 1987 Free Software Foundation, Inc.
+ This code is for the i860 cpu.
GDB is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY. No author or distributor accepts responsibility to anyone
In other words, go ahead and share GDB, but don't try to stop
anyone else from sharing it farther. Help stamp out software hoarding!
*/
-#include "defs.h"
+#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
+#include "defs.h"
#include "tm-i860.h"
#include "frame.h"
#include "inferior.h"
#include "symtab.h"
#include "value.h"
-#include "tm-i860.h"
#include "i860-opcode.h"
-#include "break.h"
+#include "breakpoint.h"
+#include "i860-break.h"
#include "command.h"
+#include "target.h"
#ifdef notdef
#include <sys/types.h>
extern int print_insn();
extern void bzero();
extern void bcopy();
-extern int store_inferior_registers(int);
-extern int outside_startup_file();
int btdebug = 0; /* change value to 1 to enable debugging code */
+int ansi_conformant;
#define BTDEBUG if (btdebug) btdebug_message
extern int errno;
extern int attach_flag;
+extern char registers[];
+CORE_ADDR get_saved_basereg();
#define INSTRUCTION_LENGTH 4
#define REGISTER_LENGTH 4
+#define ALIGN_ARG(size,len) ((size + (len-1))&(-len))
+#define NUM_FLOAT_ARG_REGS 8
+#define NUM_INT_ARG_REGS 12
/* routine to print debugging messages */
void btdebug_message(char *format, ...)
va_end ( arglist );
}
+\f
+/* Peggy Fieland. Routine that attempts to find the start of the entry sequence
+ for a routine. */
+/* maximum number of instrutions to search back */
+#define MAX_ROUTINE_SIZE 4096
+CORE_ADDR find_entry_start(pc)
+CORE_ADDR pc;
+{
+ CORE_ADDR instr, top_pc;
+ int i;
+
+ top_pc = pc;
+ for (i = 0; i < MAX_ROUTINE_SIZE; ++i)
+
+ {
+ instr = (unsigned)( adj_read_memory_integer (top_pc));
+ /* Recognize "addu|adds -X,sp,sp" insn. */
+
+ if ((instr & 0xEFFF0000) == 0x84420000)
+ {
+ return (top_pc);
+ }
+ top_pc -= INSTRUCTION_LENGTH;
+ }
+ return (0);
+}
+
+
+\f
+/* Written by Peggy Fieland (Margaret_Fieland@vos.stratus.com) */
+/* get the contents of a base register. Used for dwarf OP_BASEREG */
+/* At present, only OP_BASEREG generated is for R28. NOTE that for stuff based on R28,
+ the value we want is the VALUE AT PROCEDURE INVOKATION, and thus is the frame we
+ use to get the value is the caller's frame. */
+CORE_ADDR get_saved_basereg (frame, basereg)
+FRAME frame;
+int basereg;
+{
+ CORE_ADDR addr;
+ if (basereg == R28) /* Unconditionally ??? */
+ {
+ frame = get_prev_frame (frame);
+ get_saved_register((char *) &addr, (int *) NULL, (CORE_ADDR *) NULL, frame,
+ basereg, (enum lval_type *)NULL);
+
+ }
+ else
+ get_saved_register((char *) &addr, (int *) NULL, (CORE_ADDR *) NULL, frame,
+ basereg, (enum lval_type *)NULL);
+
+ return (addr);
+}
+
\f
/* return nonzero if the routine containing pc has been
*/
static int g_routine(pc)
+
CORE_ADDR pc;
{
CORE_ADDR instr;
CORE_ADDR top_pc;
top_pc = get_pc_function_start(pc);
+ if (top_pc == NULL)
+ top_pc = find_entry_start (pc);
+
if (top_pc != NULL)
{
instr = (unsigned)( adj_read_memory_integer (top_pc));
return(0);
}
+
/* return the stack offset where r1 (return linkage ) register is stored */
-static int find_r1_offset(pc)
-CORE_ADDR pc;
+static CORE_ADDR find_r1(pc,sp,fp)
+CORE_ADDR pc,sp, fp;
{
int r1_off,i;
- CORE_ADDR instr;
+ CORE_ADDR instr, ret_pc;
/* look for the instruction and examine the offset */
- for (i=INSTRUCTION_LENGTH*1; i< INSTRUCTION_LENGTH*4; i+=INSTRUCTION_LENGTH){
- instr = (unsigned)( adj_read_memory_integer(pc+i));
- if ((instr & 0xFFE0F801) == 0x1C400801) { /* st.l r1,X(sp) */
+ for (i=INSTRUCTION_LENGTH*1; i< INSTRUCTION_LENGTH*4; i+=INSTRUCTION_LENGTH)
+ {
+ instr = (unsigned)( adj_read_memory_integer(pc+i));
+ if ((instr & 0xFFE0F801) == 0x1C400801)
+ {
+ /* st.l r1,X(sp) */
- r1_off = SIGN_EXT16(((instr&0x001F0000) >> 5) |
- (instr&0x000007FE));
- return(r1_off);
+ r1_off = SIGN_EXT16(((instr&0x001F0000) >> 5) |
+ (instr&0x000007FE));
+ ret_pc = read_memory_integer(sp+r1_off,sizeof(long));
+ return(ret_pc);
+ }
+ else if ((instr & 0xFFE0F801) == 0x1C600801)
+ {
+ /* st.l r1,X(fp) */
+ r1_off = SIGN_EXT16(((instr&0x001F0000) >> 5) |
+ (instr&0x000007FE));
+ ret_pc = read_memory_integer(fp+r1_off,sizeof(long));
+ return(ret_pc);
+ }
}
- }
- return(-1);
+ return(0);
}
CORE_ADDR skip_prologue(CORE_ADDR);
else
return (1);
}
-
-
-
/* get the pc and frame pointer (or sp )
* for the routine that called us
* when we (this_pc) is not within a -g routine
/* note this is written for Metaware version R2.1d compiler */
/* Modified by Peggy Fieland Margaret_Fieland@vos.stratus.com */
-static int caller_pc(this_pc,this_sp,to_pc,to_fp)
- CORE_ADDR this_pc,this_sp;
+static int caller_pc(this_pc,this_sp,this_fp,to_pc,to_fp, called_from_frame_chain)
+ CORE_ADDR this_pc,this_sp, this_fp;
CORE_ADDR *to_pc, *to_fp;
+ int called_from_frame_chain;
{
CORE_ADDR func_start;
int sp_offset,offset;
func_start = get_pc_function_start(this_pc);
+ if (func_start == NULL)
+ func_start = find_entry_start (this_pc);
+
BTDEBUG("caller_pc func_start %x\n", func_start);
+ if ((func_start == NULL))
+ {
+ /* error in traceback */
+ fprintf(stderr, "error, unable to find start of function\n");
+ return(0);
+
+ }
+
if (func_start!= NULL)
{
if( has_a_frame(func_start) ){
}
else
{
- /* if we get here, procedure doesn't have a frame. If we didn't
+ /* if we get here, procedure doesn't have a frame. If we
do anything weird, the frame pointer and return register have
the values we want. Check them to see if they are valid. */
CORE_ADDR temp_rp, temp_fp;
+ /* temporary warning, since at the moment we don't have support for
+ the shared library */
+
temp_rp = read_register(RP_REGNUM);
temp_fp = read_register(FP_REGNUM);
if (!valid_regs(temp_rp, temp_fp))
{
- printf("error frame_chain\n");
+ fprintf(stderr,
+ "error - unable to find return address, traceback terminating\n");
return(0);
}
BTDEBUG("caller_pc no frame, using r1 %x and fp %x\n",
BTDEBUG("sp_offset = %d %x\n",sp_offset,sp_offset);
- offset = find_r1_offset(func_start);
+ pc = find_r1(func_start, this_sp, this_fp);
- if( offset < 0 ){
- printf("cant find return address for routine at %x\n",
- func_start);
- return(0);
- }
- pc = read_memory_integer(this_sp+offset,sizeof(long));
+ if(pc == NULL)
+ {
+
+ /* r1 wasn't stored between pc and function start */
+ pc = read_register (RP_REGNUM);
+ }
+
sp= this_sp - sp_offset;
BTDEBUG("callers pc = %x sp = %x\n",pc,sp);
BTDEBUG("caller_a_g\n");
if( ! (offset = find_fp_offset(func_start)) ) {
- printf("error fp_offset\n");
+ fprintf(stderr, "error - unable to find caller frame for routine at 0x%x, "
+ "traceback terminating\n", func_start);
return(0);
}
BTDEBUG("offset = %x %d\n",offset,offset);
if (!valid_regs(temp_rp, temp_fp))
{
- printf("error frame_chain\n");
+ fprintf(stderr,
+ "error - unable to find return address, traceback terminating\n");
+
return(0);
}
BTDEBUG("caller_pc no frame, using r1 %x and fp %x\n",
CORE_ADDR nextadr, prevadr;
int val = not_branch;
long offset; /* Must be signed for sign-extend */
- extern char registers[];
prevadr = nextadr = 0;
brk->address1 = 0;
/* bc /bnc */
/* bc.t /bnc.t*/
if ((instr & 0xF8000000) == 0x68000000) /* br or call */
- printf(" Breakpoint adjusted to avoid br/call delay slot and multiple breakpoints\n");
+ BTDEBUG(" Breakpoint adjusted to avoid br/call delay slot and multiple breakpoints\n");
if ((instr & 0xF4000000) == 0x74000000) /* bc.t or bnc.t */
- printf(" Breakpoint adjusted to avoid bc.t/bnc.t delay slot and multiple breakpoints\n");
+ BTDEBUG(" Breakpoint adjusted to avoid bc.t/bnc.t delay slot and"
+ "multiple breakpoints\n");
+
/* it IS really OK to set a break on the instruction AFTER the conditional branch
-- it DOESN't have a delay slot */
if ((instr & 0xF4000000) == 0x70000000) /* bc / bnc */
- /* printf(" Breakpoint adjusted to avoid bc/bnc delay slot and multiple breakpoints\n"); */
adjust = 0;
} else if
((instr & 0xFC00003F) == 0x4C000002 || /* bri/ calli */
(instr & 0xFC000000) == 0x40000000)
{
adjust++;
- printf(" Breakpoint adjusted to avoid calli/bri delay slot and multiple breakpoints\n");
+ BTDEBUG(" Breakpoint adjusted to avoid calli/bri delay slot and"
+ " multiple breakpoints\n");
} else if
((instr & 0xF0000000) == 0x50000000) /* bte - btne */
{
((instr & 0xFC000000) == 0xB4000000)
{
adjust++;
- printf(" Breakpoint adjusted to avoid bla delay slot and multiple breakpoints\n");
+ BTDEBUG(" Breakpoint adjusted to avoid bla delay slot and"
+ " multiple breakpoints\n");
}
if (adjust != 0)
{
{
CORE_ADDR pc;
branch_type place_brk();
-
+ int *shadow0, *shadow1, *shadow2, *shadow3;
+
+ shadow0 = (int *) &brk.shadow_contents[0];
+ shadow1 = (int *) &brk.shadow_contents[4];
+ shadow2 = (int *) &brk.shadow_contents[8];
+ shadow3 = (int *) &brk.shadow_contents[12];
pc = read_register (PC_REGNUM);
if (!one_stepped)
{
brk.address = pc;
place_brk (pc, SINGLE_STEP_MODE, &brk);
- brk.shadow_contents[0] = brk.shadow_contents[1] = 0;
- brk.shadow_contents[2] = brk.shadow_contents[3] = 0;
+ *shadow0 = *shadow1 = *shadow2 = *shadow3 = 0;
if (brk.mode == DIM)
{
}
if (( brk.address1 != NULL))
{
- adj_read_memory (brk.act_addr[2], &brk.shadow_contents[2],
+ adj_read_memory (brk.act_addr[2], shadow2,
INSTRUCTION_LENGTH);
adj_write_memory (brk.act_addr[2], break_insn, INSTRUCTION_LENGTH);
- adj_read_memory (brk.act_addr[3], &brk.shadow_contents[3],
+ adj_read_memory (brk.act_addr[3], shadow3,
INSTRUCTION_LENGTH);
/* adj_write_memory (brk.act_addr[3], float_insn,
INSTRUCTION_LENGTH); */
btdebug_message("\n");
}
- adj_read_memory (brk.act_addr[0], &brk.shadow_contents[0],
+ adj_read_memory (brk.act_addr[0], shadow0,
INSTRUCTION_LENGTH);
adj_write_memory (brk.act_addr[0], break_insn,
INSTRUCTION_LENGTH);
- adj_read_memory (brk.act_addr[1], &brk.shadow_contents[1],
+ adj_read_memory (brk.act_addr[1], shadow1,
INSTRUCTION_LENGTH);
/* adj_write_memory (brk.act_addr[1], float_insn,
INSTRUCTION_LENGTH); */
print_insn( brk.act_addr[2], stderr);
btdebug_message("\n");
}
- adj_read_memory (brk.act_addr[2], &brk.shadow_contents[2],
+ adj_read_memory (brk.act_addr[2], shadow2,
INSTRUCTION_LENGTH);
adj_write_memory (brk.act_addr[2], break_insn, INSTRUCTION_LENGTH);
}
print_insn( brk.act_addr[0], stderr);
btdebug_message("\n");
}
- adj_read_memory (brk.act_addr[0], &brk.shadow_contents[0],
+ adj_read_memory (brk.act_addr[0], shadow0,
INSTRUCTION_LENGTH);
adj_write_memory (brk.act_addr[0], break_insn,INSTRUCTION_LENGTH);
}
/* Remove breakpoints */
if (brk.mode == DIM)
{
- adj_write_memory (brk.act_addr[0], &brk.shadow_contents[0],
+ adj_write_memory (brk.act_addr[0], shadow0,
INSTRUCTION_LENGTH);
- adj_write_memory (brk.act_addr[1], &brk.shadow_contents[1],
+ adj_write_memory (brk.act_addr[1], shadow1,
INSTRUCTION_LENGTH);
} else {
- adj_write_memory (brk.act_addr[0], &brk.shadow_contents[0],
+ adj_write_memory (brk.act_addr[0], shadow0,
INSTRUCTION_LENGTH);
}
{
if (brk.mode == DIM)
{
- adj_write_memory (brk.act_addr[2], &brk.shadow_contents[2],
+ adj_write_memory (brk.act_addr[2], shadow2,
INSTRUCTION_LENGTH);
- adj_write_memory (brk.act_addr[3], &brk.shadow_contents[3],
+ adj_write_memory (brk.act_addr[3], shadow3,
INSTRUCTION_LENGTH);
} else {
- adj_write_memory (brk.act_addr[2], &brk.shadow_contents[2],
+ adj_write_memory (brk.act_addr[2], shadow2,
INSTRUCTION_LENGTH);
}
}
at fp + NUM_REGS*4 */
for (i = 1; i < NUM_REGS; i++) /* skip reg 0 */
- if (i != SP_REGNUM && i != FP0_REGNUM && i != FP0_REGNUM + 1)
- /* the register numbers used in the instruction and the ones used to index
- the regs array are not the same -- compensate */
- frame_saved_regs->regs[i+R0] = frame_info->frame + i*REGISTER_LENGTH;
-
- frame_saved_regs->regs[SP_REGNUM] = frame_info->frame + NUM_REGS*REGISTER_LENGTH;
+ /* the register numbers used in the instruction and the ones used to index
+ the regs array are not the same -- compensate */
+ frame_saved_regs->regs[i+R0] = frame_info->frame + i*REGISTER_LENGTH;
call_dummy_set = 0;
return;
}
pc = get_pc_function_start (frame_info->pc);
+ if (pc == NULL)
+ pc = find_entry_start (frame_info->pc);
+
if (pc != NULL)
{
instr = (unsigned)(adj_read_memory_integer (pc));
CORE_ADDR instr;
int offset;
CORE_ADDR thisfp = thisframe->frame;
-
- /* get the frame pointer actually sp for a non -g
+ struct frame_saved_regs fsr;
+ CORE_ADDR thissp;
+
+ /* get the frame pointer actually sp for a non -g
* for the routine that called us routine
*/
}
if( ! g_routine(thisframe->pc) ){
+ thissp = get_saved_basereg (thisframe, SP_REGNUM);
+
BTDEBUG( "non g at %x\n",thisframe->pc);
- caller_pc(thisframe->pc,thisframe->sp,&pc,&fp);
+ caller_pc(thisframe->pc, thissp, thisfp,&pc,&fp, 1);
BTDEBUG("caller_pc returned %x %x \n",pc,fp);
return(fp);
/* handle the Metaware-type pseudo-frame */
func_start = get_pc_function_start(thisframe->pc);
-
+ if (func_start == NULL)
+ func_start = find_entry_start (thisframe->pc);
+
if (func_start != NULL)
{
CORE_ADDR func_start, prologue_end;
func_start = get_pc_function_start(pc);
+ if (func_start == NULL)
+ func_start = find_entry_start (pc);
+
if (func_start != NULL)
{
prologue_end = func_start;
CORE_ADDR pc1;
CORE_ADDR sp ;
CORE_ADDR fp;
+ struct frame_saved_regs fsr;
frame = frame_struct->frame;
pc = frame_struct->pc;
- sp = frame_struct->sp;
-
+
+
BTDEBUG("frame_saved_pc input: frame %x, pc %x",
frame, pc);
}
else if( ! g_routine(pc) )
{
- caller_pc(pc,sp,&pc,&frame);
+ sp = get_saved_basereg (frame_struct, SP_REGNUM);
+
+ caller_pc(pc,sp,frame_struct->frame, &pc,&frame, 0);
}
else
{
pc = read_memory_integer (frame + 4, sizeof(long));
- if (!outside_startup_file(pc))
+ if (inside_entry_file(pc))
{
- BTDEBUG("pc %x outside startup file \n",pc);
+ BTDEBUG("pc %x outside entry file \n",pc);
pc1 = read_memory_integer (frame, sizeof(long));
- if (outside_startup_file(pc1))
+ if (!inside_entry_file(pc1))
pc = pc1;
else
pc = 0;
}
/* Pass arguments to a function in the inferior process - ABI compliant
- Note that this routine DOES NOT HANDLE memory argument lists, ie
- it gives up if there are too many arguments to pass in registers.*/
+ Modified by Peggy Fieland (Margaret_Fieland@vos.stratus.com) to account
+ for newer ABI conventions. Note that now, unfortunately, we MUST KNOW
+ if we expect a float or a double. For now, we will assume that the
+ caller of this routine has the types of these arguments correct....
+ NOTE THAT THIS ROUTINE DOES NO ARGUMENT COERCION -- it's all in the
+ caller.
+ Modified by Peggy Fieland to handle memory argument lists.
+ */
-void
-pass_function_arguments(args, nargs, struct_return)
+#define IS_EVEN_REG(fl) (((fl - FP0_REGNUM)%2) == 0)
+CORE_ADDR
+pass_function_arguments(args, nargs, struct_return, struct_addr, sp)
value *args;
int nargs;
int struct_return;
+ CORE_ADDR struct_addr;
+ CORE_ADDR sp;
{
- int ireg = (struct_return) ? 17 : 16;
- int freg = FP0_REGNUM + 8;
+ int ireg = (struct_return) ? R17 : R16;
+ int freg = F8;
int i;
struct type *type;
value arg;
- long tmp;
- value value_arg_coerce();
-
+ signed long tmp;
+ unsigned long ul_tmp;
+ signed short s_tmp;
+ unsigned short us_tmp;
+ signed char c_tmp;
+ unsigned char uc_tmp;
+ CORE_ADDR arg_ptr;
+ int len;
+
+ if (struct_return)
+ {
+ write_register(R16, struct_addr);
+ }
+
+ arg_ptr = sp; /* Space was allocated for memory argument list in i860_arg_coerce */
+
+ /* Loop through the arguments, putting the values in a register or memory as appropriate. */
for (i = 0; i < nargs; i++)
{
- arg = value_arg_coerce(args[i]);
+ arg = args[i];
type = VALUE_TYPE(arg);
+ len = TYPE_LENGTH(type);
if (type == builtin_type_double)
{
- write_register_bytes(REGISTER_BYTE(freg), VALUE_CONTENTS(arg), sizeof(double));
- freg += 2;
+ /* see ABI . Note freg MUST BE INCREMENTED even if arg goes into the
+ memory argument list for this code to work correctly for subsequent
+ arguments. */
+ if (!IS_EVEN_REG(freg))
+ freg += 1;
+ /* see if argument can be put in a register, or whether it must go
+ into the memory argument list */
+ if (freg < F8 + NUM_FLOAT_ARG_REGS)
+ {
+ /* It can go in a register */
+ bcopy(VALUE_CONTENTS(arg), &tmp, sizeof(double));
+ write_register_bytes(REGISTER_BYTE(freg), (char *) &tmp, TYPE_LENGTH(type));
+ freg += 2;
+ }
+ else
+ {
+ /* It goes into memory argument list */
+ arg_ptr = ALIGN_ARG( arg_ptr, sizeof(double));
+ write_memory (arg_ptr, VALUE_CONTENTS (arg), len);
+ arg_ptr += len;
+ }
+
+ }
+ else if (type == builtin_type_float)
+ {
+ if (freg < F8 + NUM_FLOAT_ARG_REGS)
+ {
+ /* It can go in a register */
+ bcopy(VALUE_CONTENTS(arg), &tmp, sizeof(long));
+ write_register_bytes (REGISTER_BYTE(freg), (char *) &tmp, TYPE_LENGTH(type));
+ freg++;
+ }
+ else
+ {
+ /* It goes into the memory argument list */
+ arg_ptr = ALIGN_ARG(arg_ptr, sizeof(float));
+ write_memory (arg_ptr, VALUE_CONTENTS (arg), len);
+ arg_ptr += len;
+ }
}
else
{
- bcopy(VALUE_CONTENTS(arg), &tmp, sizeof(long));
- write_register(ireg, tmp);
- ireg++;
+ /* All structs are passed by value, and hence they all go into the memory
+ argument list (see ABI); otherwise, as above, see if we have run
+ out of registers */
+
+ /* Cast value correctly so we can load it into a register or into the
+ memory argument list -- see ABI */
+ if (TYPE_LENGTH(type) < sizeof(long))
+ {
+ if (TYPE_FLAGS(type) & TYPE_FLAG_UNSIGNED)
+ arg = value_cast(builtin_type_unsigned_int, arg);
+ else
+ arg = value_cast (builtin_type_int, arg);
+ type = VALUE_TYPE(arg);
+ len = TYPE_LENGTH(type);
+ }
+
+ if ((TYPE_CODE(type) == TYPE_CODE_STRUCT) || (ireg >= R16 + NUM_INT_ARG_REGS))
+ {
+ /* It goes into the memory argument list. Minimum alignment requirements
+ are on a 4-byte boundary */
+
+ if ((TYPE_CODE(type) == TYPE_CODE_INT) ||
+ (TYPE_CODE(type) == TYPE_CODE_ENUM) ||
+ (TYPE_CODE(type) == TYPE_CODE_CHAR) ||
+ (TYPE_CODE(type) == TYPE_CODE_BOOL))
+ arg_ptr = ALIGN_ARG(arg_ptr, len);
+ else
+ arg_ptr = ALIGN_ARG (arg_ptr, sizeof(long)); /* align on 4-byte boundary */
+ write_memory (arg_ptr, VALUE_CONTENTS (arg), len);
+ arg_ptr += len;
+ }
+ else
+ {
+
+ bcopy(VALUE_CONTENTS(arg), &tmp, sizeof(long));
+ write_register(ireg, tmp);
+ ireg++;
+ }
+
}
}
- if (ireg >= 28 || freg >= FP0_REGNUM + 16)
- error("Too many arguments to function");
+
+
+ return (sp);
+
}
};
#define NREGS 32
-#if 0
-/* This routine is uncalled -- remove this routine sometime */
+
get_reg(regno)
{
char raw_buffer[32];
int addr;
int virtual_buffer;
-
- read_relative_register_raw_bytes (regno, raw_buffer);
+
+ /* NOTE that only integer and floating point registers can be relative to a frame */
+
+ if ((regno >= R0) && (regno <= F31)) /* user register */
+ read_relative_register_raw_bytes (regno, raw_buffer);
+ else
+ bcopy (®isters[regno << 2], raw_buffer, sizeof (long));
+
REGISTER_CONVERT_TO_VIRTUAL (addr, raw_buffer, &virtual_buffer);
return(virtual_buffer);
}
-#endif
#if 0
}
#endif
-extern char registers[];
/* i860-specific routine to print the register set. Note that we ALWAYS print information
- on the floating point registers, so we ignore the parameter fpregs */
+ on the floating point registers, so we ignore the parameter fpregs.
+ NOTE also that only integer and floating point registers can be relative to a frame --
+ see subroutine get_reg (above ) */
+
void i860_do_registers_info(regnum,fpregs)
int regnum;
int fpregs;
if (regnum != -1) /* print one register */
{
- if ((regnum >=F0 ) && (regnum <= F31))
- bcopy (®isters[ADJ_FREG(regnum)<<2], &val, sizeof (long));
- else
- bcopy (®isters[regnum<<2], &val, sizeof (long));
+ val = get_reg(regnum);
printf("%-4s 0x%08x\t", reg_names[regnum], val);
printf("\n\t"); fflush(stdout);
}
printf("\n Control/Status Registers :- \n\t");
for (j=0; j<=DB; j++)
{
- bcopy (®isters[j<<2], &val, sizeof (long));
+ val = get_reg(j);
printf("%-4s 0x%08x\t", reg_names[j], val);
}
printf("\n\t"); fflush(stdout);
/* EPSR */
- bcopy (®isters[EPSR<<2], &val, sizeof (long));
+ val = get_reg(EPSR);
printf("%-4s 0x%08x\t", reg_names[EPSR], val);
/* FSR */
- bcopy (®isters[FSR<<2], &val, sizeof (long));
+ val = get_reg(FSR);
printf("%-4s 0x%08x\t", reg_names[FSR], val);
/* CCR */
- bcopy (®isters[CCR<<2], &val, sizeof (long));
+ val = get_reg(CCR);
printf("%-4s 0x%08x\t", reg_names[CCR], val);
/* BEAR*/
- bcopy (®isters[BEAR<<2], &val, sizeof (long));
+ val = get_reg(BEAR);
printf("%-4s 0x%08x\t", reg_names[BEAR], val);
#ifdef JIM_ADD_PRIV
for (j=P0; j<=P3; j++)
{
- bcopy (®isters[j<<2], &val, sizeof (long));
+ val = get_reg(j);
printf("%-4s 0x%08x\t", reg_names[j], val);
}
#endif
{
printf("\n\t"); fflush(stdout);
}
- bcopy (®isters[j<<2], &val, sizeof (long));
+ val = get_reg(j);
printf("%-4s 0x%08x\t", reg_names[j], val);
}
{
printf("\n\t"); fflush(stdout);
}
- bcopy (®isters[ADJ_FREG(j)<<2], &val, sizeof (long));
+ val = get_reg(j);
printf("%-4s 0x%08x\t", reg_names[j], val);
}
{
printf("\n\t"); fflush(stdout);
}
- bcopy (®isters[j<<2], &val, sizeof (long));
- bcopy (®isters[(j+1)<<2], &valh, sizeof (long));
+ val = get_reg(j);
+ valh = get_reg(j+1);
printf("%-6s 0x%08x %08x\t", reg_names[j], val,valh);
}
{
unsigned int valh;
j = PSV_I1;
- bcopy (®isters[j<<2], &val, sizeof (long));
- bcopy (®isters[(j+1)<<2], &valh, sizeof (long));
+ val = get_reg(j);
+ valh = get_reg(j+1);
printf("\t\t\t%-8s 0x%08x %08x \n", reg_names[j], val,valh);
}
for (j=PSV_L1; j<=PSV_L3; j+=REGISTER_LENGTH)
{
unsigned int valh, val2,val3;
- bcopy (®isters[j<<2], &val, sizeof (long));
- bcopy (®isters[(j+1)<<2], &valh, sizeof (long));
- bcopy (®isters[(j+2)<<2], &val2, sizeof (long));
- bcopy (®isters[(j+3)<<2], &val3, sizeof (long));
+
+ val = get_reg(j);
+ valh = get_reg(j+1);
+ val2 = get_reg(j+2);
+ val3 = get_reg(j+3);
+
printf("\t\t%-8s 0x%08x %08x %08x %08x\n", reg_names[j],
val,valh,val2,val3);
}
for (i=PSV_FSR1,j=PSV_A1,k=PSV_M1; j<=PSV_A3; i++,j+=2,k+=2)
{
unsigned int valh,val2,val3,val4;
- bcopy (®isters[i<<2], &val4, sizeof (long));
- bcopy (®isters[j<<2], &val, sizeof (long));
- bcopy (®isters[(j+1)<<2], &valh, sizeof (long));
- bcopy (®isters[k<<2], &val2, sizeof (long));
- bcopy (®isters[(k+1)<<2], &val3, sizeof (long));
+
+ val4 = get_reg(i);
+ val = get_reg(j);
+ valh = get_reg(j+1);
+ val2 = get_reg(k);
+ val3 = get_reg(k+1);
+
printf(" %-4s 0x%08x %08x\t", reg_names[j], val,valh);
printf("%-4s 0x%08x %08x\t", reg_names[k], val2,val3);
printf("%-4s 0x%08x\n", reg_names[i], val4);
/* set a "read" data breakpoint. */
void
-d_ro_break_command(arg)
-char *arg;
+d_ro_break_command(char *arg, int num)
{
dbrkval = strtoul(arg, NULL, 0);
dbrkmod = 0x01;
/* set a "write" data breakpoint. */
void
-d_wo_break_command(arg)
-char *arg;
+d_wo_break_command(char *arg, int num)
{
dbrkval = strtoul(arg, NULL, 0);
dbrkmod = 0x02;
/* set a "read/write" data breakpoint. */
void
-d_rw_break_command(arg)
-char *arg;
-{
- dbrkval = strtoul(arg, NULL, 0);
- dbrkmod = 0x03;
- BTDEBUG(" rw_dbreak - %x %x\n", dbrkval, dbrkmod);
-}
+d_rw_break_command(char *arg, int num)
+{
+ dbrkval = strtoul(arg, NULL, 0);
+ dbrkmod = 0x03;
+ BTDEBUG(" rw_dbreak - %x %x\n", dbrkval, dbrkmod);
+ }
/* clear data breakpoint. */
-void
-clear_dbreak()
-{
- dbrkval = 0;
- dbrkmod = 0;
-}
-
-/* i860-specific breakpoint initialization. Includes adding the i860-specific
- data breakpoint commands. */
-void
-i860_init_breakpoints()
-{
+ void clear_dbreak(char *arg, int num)
+ {
+ dbrkval = 0;
+ dbrkmod = 0;
+ }
+
+/* i860-specific breakpoint initialization. Includes adding the
+i860-specific data breakpoint commands. */
+void i860_init_breakpoints()
+{
dbrkval = dbrkmod = 0;
add_com ("dbro", class_breakpoint, d_ro_break_command,
"Set a data breakpoint READ ONLY, 32-bit data element.");
struct breakpoint *b;
{
int val;
+ int *shadow0, *shadow1, *shadow2, *shadow3;
+
+ shadow0 = (int *)&b->shadow_contents[0];
+ shadow1 = (int *)&b->shadow_contents[4];
+ shadow2 = (int *)&b->shadow_contents[8];
+ shadow3 = (int *)&b->shadow_contents[12];
place_brk( b->address, BREAK_MODE, b );
+
if (b->mode == DIM)
{
- adj_read_memory (b->act_addr[0], &b->shadow_contents[0], INSTRUCTION_LENGTH);
+ adj_read_memory (b->act_addr[0], shadow0, INSTRUCTION_LENGTH);
val = adj_write_memory (b->act_addr[0], break_insn, INSTRUCTION_LENGTH);
if (val != 0 ) return val;
- adj_read_memory (b->act_addr[1], &b->shadow_contents[1], INSTRUCTION_LENGTH);
+ adj_read_memory (b->act_addr[1], shadow1, INSTRUCTION_LENGTH);
/* val = adj_write_memory (b->act_addr[1], float_insn, INSTRUCTION_LENGTH); */
if (val != 0) return val;
}
else
{
- adj_read_memory (b->act_addr[0], &b->shadow_contents[0], INSTRUCTION_LENGTH);
+ adj_read_memory (b->act_addr[0], shadow0, INSTRUCTION_LENGTH);
val = adj_write_memory (b->act_addr[0], break_insn, INSTRUCTION_LENGTH);
}
if (b->address1 != 0)
if (b->mode == DIM)
{
- adj_read_memory (b->act_addr[2], &b->shadow_contents[2], INSTRUCTION_LENGTH);
+ adj_read_memory (b->act_addr[2], shadow2, INSTRUCTION_LENGTH);
val = adj_write_memory (b->act_addr[2], break_insn, INSTRUCTION_LENGTH);
if (val) return val;
- adj_read_memory (b->act_addr[3], &b->shadow_contents[3], INSTRUCTION_LENGTH);
+ adj_read_memory (b->act_addr[3], shadow3, INSTRUCTION_LENGTH);
/* val = adj_write_memory (b->act_addr[3], float_insn, INSTRUCTION_LENGTH); */
if (val != 0) return val;
}
else
{
- adj_read_memory (b->act_addr[2], &b->shadow_contents[0], INSTRUCTION_LENGTH);
+ adj_read_memory (b->act_addr[2], shadow0, INSTRUCTION_LENGTH);
val = adj_write_memory (b->act_addr[2], break_insn, INSTRUCTION_LENGTH);
}
}
if (val != 0)
return val;
- BTDEBUG("Inserted breakpoint at 0x%x, shadow 0x%x, 0x%x.\n",
- b->address, b->shadow_contents[0], b->shadow_contents[1]);
+
b->inserted = 1;
return 0;
}
struct breakpoint *b;
{
int val;
+ int *shadow0, *shadow1, *shadow2, *shadow3;
+
+ shadow0 = (int *)&b->shadow_contents[0];
+ shadow1 = (int *)&b->shadow_contents[4];
+ shadow2 = (int *)&b->shadow_contents[8];
+ shadow3 = (int *)&b->shadow_contents[12];
+
if (b->inserted)
{
if (b->mode == DIM)
{
- val =adj_write_memory (b->act_addr[0], &(b->shadow_contents[0]),
+ val =adj_write_memory (b->act_addr[0], shadow0,
INSTRUCTION_LENGTH);
- val =adj_write_memory (b->act_addr[1], &(b->shadow_contents[1]),
+ val =adj_write_memory (b->act_addr[1],shadow1,
INSTRUCTION_LENGTH);
if (b->address1 != NULL)
{
- val =adj_write_memory (b->act_addr[2], &(b->shadow_contents[2]),
+ val =adj_write_memory (b->act_addr[2],shadow2,
INSTRUCTION_LENGTH);
- val =adj_write_memory (b->act_addr[3], &(b->shadow_contents[3]),
+ val =adj_write_memory (b->act_addr[3], shadow3,
INSTRUCTION_LENGTH);
}
}
else
{
- val =adj_write_memory (b->act_addr[0], b->shadow_contents,
+ val =adj_write_memory (b->act_addr[0], shadow0,
INSTRUCTION_LENGTH);
if (b->address1 != NULL)
{
- val =adj_write_memory (b->act_addr[2], b->shadow_contents,
+ val =adj_write_memory (b->act_addr[2],shadow0,
INSTRUCTION_LENGTH);
}
}
if (val != 0)
return val;
b->inserted = 0;
- BTDEBUG( "Removed breakpoint at 0x%x, shadow 0x%x, 0x%x.\n",
- b->address, b->shadow_contents[0], b->shadow_contents[1]);
}
return 0;
}
}
#endif
+
+
+/* Push an empty stack frame, to record the current PC, etc. */
+/* We have this frame with fp pointing to a block where all GDB-visible
+ registers are stored in the order GDB knows them, and sp at the next
+ alignment point below fp. Note: fp + NUM_REGS*4 was the old sp
+ */
+extern CORE_ADDR text_end;
+CORE_ADDR dummy_start_addr;
+void i860_push_frame()
+{
+ register CORE_ADDR old_fp = read_register(FP_REGNUM);
+ register CORE_ADDR old_sp = read_register(SP_REGNUM);
+ register CORE_ADDR fp ;
+ extern char registers[];
+
+ fp = old_sp - REGISTER_BYTES;
+ write_memory(fp, registers, REGISTER_BYTES); /* write out old register values */
+ /* reset FP and SP */
+ write_register(FP_REGNUM, fp);
+ write_register(SP_REGNUM, (fp &~ 15)); /* re-align */
+ call_dummy_set = 1;
+}
+/* Discard from the stack the innermost frame,
+ restoring all saved registers. */
+
+void i860_pop_frame()
+{ register FRAME frame = get_current_frame ();
+ register CORE_ADDR fp;
+ struct frame_info *fi;
+ int i;
+
+ fi = get_frame_info (frame);
+ fp = fi->frame;
+
+ if (call_dummy_set && fi -> pc >= call_dummy_start &&
+ fi -> pc <= call_dummy_start + CALL_DUMMY_LENGTH)
+ {
+
+ read_memory(fp, registers, REGISTER_BYTES);
+
+ target_store_registers(-1);
+
+ {
+ /* since we stomped on code that will be executed when we exit the program,
+ restore it. */
+ extern REGISTER_TYPE call_save_code[4];
+
+ write_memory (call_dummy_start, (char *) call_save_code, 16);
+
+ }
+ call_dummy_set = 0;
+ }
+ else
+ {
+ register int regnum;
+ struct frame_saved_regs fsr;
+ char raw_buffer[12];
+
+ get_frame_saved_regs (fi, &fsr);
+ for (regnum = FP0_REGNUM + 31; regnum >= FP0_REGNUM; regnum--)
+ if (fsr.regs[regnum])
+ write_register (regnum, read_memory_integer (fsr.regs[regnum], 4));
+ for (regnum = R31; regnum >= 1; regnum--)
+ if (fsr.regs[regnum])
+ if (regnum != SP_REGNUM)
+ write_register (regnum, read_memory_integer (fsr.regs[regnum], 4));
+ else
+ write_register (SP_REGNUM, fsr.regs[SP_REGNUM]);
+ if (fsr.regs[PS_REGNUM])
+ write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_REGNUM], 4));
+ if (fsr.regs[FPS_REGNUM])
+ write_register (FPS_REGNUM, read_memory_integer (fsr.regs[FPS_REGNUM],4));
+ if (fsr.regs[PC_REGNUM])
+ write_register (PC_REGNUM,CLEAN_PC( read_memory_integer (fsr.regs[PC_REGNUM], 4)));
+ }
+
+ flush_cached_frames ();
+
+ set_current_frame (create_new_frame (read_register (FP_REGNUM),
+ read_pc ()));
+
+}
+
+CORE_ADDR i860_arg_coerce(nargs, args, struct_return, sp)
+ int nargs;
+ value *args;
+ int struct_return;
+ CORE_ADDR sp;
+{
+
+ register int scalar;
+ register enum type_code code2;
+ register struct type *type;
+ int i;
+ value arg;
+ int num_int_args = 0;
+ int num_float_args = 0;
+ int size = 0;
+ CORE_ADDR arg_ptr;
+
+ /* if we return a structure, it's address is in R16, and thus it uses up one of the integer
+ argument registers. See the ABI. */
+ if (struct_return)
+ num_int_args += 1;
+
+ /* loop to do the right thing with all the arguments and calculate the size of the memory
+ argument list. We keep count of the number of integer and the number of float parameters,
+ as well as the size of the memory argument list. */
+
+ for (i = 0; i < nargs; i++)
+ {
+
+ /* NOTE that this is all hunky dory in spite of the fact that we don't actually
+ have the signature of the called procedure EXCEPT if we are passing in floats!
+ This is true, since registers are 4 bytes, and the minimum alignment in the
+ memory argument list is 4 bytes. See the ABI for more gory details. The switch
+ "ansi-conformant" is an attempt to get around this problem. */
+
+ code2 = TYPE_CODE (VALUE_TYPE(args[i]));
+
+ /* Only coerce if we've got switch "ansi-conformant" off.
+ Actually, it's OK ( and probably helpful) to coerce ALL integer arguments
+ (see comment above), but never mind, we make them the right size in
+ pass_function_arguments. */
+
+ if ((!ansi_conformant) && (code2 != TYPE_CODE_STRUCT))
+ value_arg_coerce(args[i]);
+
+ arg = args[i];
+ type = VALUE_TYPE(args[i]);
+
+ /* All structures are passed by value in the memory argument list. */
+ if (code2 == TYPE_CODE_STRUCT)
+ {
+ size = ALIGN_ARG(size, sizeof(long));
+ size += TYPE_LENGTH(type);
+ }
+ else if (type == builtin_type_float)
+ {
+ num_float_args += 1;
+ if (num_float_args > NUM_FLOAT_ARG_REGS)
+ {
+ size = ALIGN_ARG(size, TYPE_LENGTH(type)) ;
+ size += TYPE_LENGTH(type);
+ }
+ }
+ else if (type == builtin_type_double)
+ {
+ /* floating register alignment -- see ABI */
+ if ((num_float_args%2) != 0)
+ num_float_args += 1;
+
+ num_float_args += 2; /* use up two registers */
+
+ if (num_float_args > NUM_FLOAT_ARG_REGS)
+ {
+ size = ALIGN_ARG(size, TYPE_LENGTH(type)) ;
+ size += TYPE_LENGTH(type);
+ }
+ }
+ else
+ {
+ int len = max (sizeof(long), TYPE_LENGTH(type));
+
+ num_int_args += 1;
+
+ if (num_int_args > NUM_INT_ARG_REGS)
+ {
+ /* see ABI -- in-memory arguments have AT LEAST word alignment */
+ if ((TYPE_CODE(type) == TYPE_CODE_INT) ||
+ (TYPE_CODE(type) == TYPE_CODE_ENUM) ||
+ (TYPE_CODE(type) == TYPE_CODE_CHAR) ||
+ (TYPE_CODE(type) == TYPE_CODE_BOOL))
+ size = ALIGN_ARG(size, len);
+ else
+ size = ALIGN_ARG(size, sizeof(long));
+ size += len;
+ }
+ }
+
+ }
+
+
+ /* recalculate the stack pointer, leaving enough space for the memory argument list and
+ realigning the stack pointer. */
+ if (size != 0)
+ {
+ arg_ptr = sp - size;
+
+ arg_ptr = arg_ptr & (-16); /* realign stack */
+ write_register (R28,arg_ptr);
+ sp = arg_ptr;
+ }
+
+return (sp);
+
+}
+void i860_extract_return_value(type,regbuf,valbuf)
+struct type *type;
+char regbuf[REGISTER_BYTES];
+char *valbuf;
+{
+ register int len = TYPE_LENGTH (type);
+ double tmp_db;
+ float tmp_flt;
+
+ if ((TYPE_CODE(type) == TYPE_CODE_FLT))
+ {
+ if (len == sizeof (float))
+ {
+ /* FIXME
+ NOTE that this assumes that the function declaration was ANSI_CONFORMANT --
+ at the present time I can't think of ANY WAY to disambiguate the two following
+ cases:
+ float really_does_return_a_float(float ff)
+ { ...}
+ and
+ float actually_returns_a_double(ff)
+ float ff;
+ {...}
+ */
+ bcopy ((char *) (regbuf) + REGISTER_BYTE(ADJ_FREG(F8)), (valbuf), TYPE_LENGTH (type)) ;
+ }
+ else
+ bcopy ((char *) (regbuf) + REGISTER_BYTE(F8), (valbuf), TYPE_LENGTH (type)) ;
+ }
+ else
+ bcopy ((char *) (regbuf) + REGISTER_BYTE(R16), (valbuf), TYPE_LENGTH (type));
+
+}
+void i860_store_return_value(type,valbuf)
+struct type *type;
+char *valbuf;
+{
+ register int len = TYPE_LENGTH (type);
+ double tmp_db;
+
+ if ((TYPE_CODE(type) == TYPE_CODE_FLT) )
+ {
+ write_register_bytes (REGISTER_BYTE (F8), valbuf, len);
+ }
+ else
+ write_register_bytes (REGISTER_BYTE (R16), valbuf, TYPE_LENGTH (type));
+
+}
+
projects / deliverable / binutils-gdb.git / blobdiff