mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2025-02-16 07:27:56 +00:00
Tue Sep 17 18:46:57 1996 Martin M. Hunt <hunt@pizza.cygnus.com>
* d10v-tdep.c, config/d10v/tm-d10v.h: Snapshot.
This commit is contained in:
Martin Hunt
parent
8d784abe56
commit
e05bda9f12
@ -1,3 +1,9 @@
|
||||
start-sanitize-d10v
|
||||
Tue Sep 17 18:46:57 1996 Martin M. Hunt <hunt@pizza.cygnus.com>
|
||||
|
||||
* d10v-tdep.c, config/d10v/tm-d10v.h: Snapshot.
|
||||
|
||||
end-sanitize-d10v
|
||||
Tue Sep 17 12:20:50 1996 Ian Lance Taylor <ian@cygnus.com>
|
||||
|
||||
* configure.in: Add cases for MIPS 5000 like MIPS 4300.
|
||||
|
||||
270
gdb/d10v-tdep.c
270
gdb/d10v-tdep.c
@ -26,27 +26,214 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||||
#include "inferior.h"
|
||||
#include "dis-asm.h"
|
||||
|
||||
void d10v_frame_find_saved_regs PARAMS ((struct frame_info *fi, struct frame_saved_regs *fsr));
|
||||
|
||||
/* Discard from the stack the innermost frame,
|
||||
restoring all saved registers. */
|
||||
|
||||
void
|
||||
d10v_pop_frame ()
|
||||
{
|
||||
struct frame_info *frame = get_current_frame ();
|
||||
CORE_ADDR fp, r13;
|
||||
int regnum;
|
||||
struct frame_saved_regs fsr;
|
||||
char raw_buffer[8];
|
||||
|
||||
fp = FRAME_FP (frame);
|
||||
/* printf("pop_frame 0x%x\n",fp); */
|
||||
|
||||
/* fill out fsr with the address of where each */
|
||||
/* register was stored in the frame */
|
||||
get_frame_saved_regs (frame, &fsr);
|
||||
|
||||
/* r13 contains the old PC. save it. */
|
||||
r13 = read_register (13);
|
||||
|
||||
/* now update the current registers with the old values */
|
||||
for (regnum = A0_REGNUM; regnum < A0_REGNUM+2 ; regnum++)
|
||||
{
|
||||
if (fsr.regs[regnum])
|
||||
{
|
||||
read_memory (fsr.regs[regnum] & 0xFFFF, raw_buffer, 8);
|
||||
write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 8);
|
||||
}
|
||||
}
|
||||
for (regnum = 0; regnum < SP_REGNUM; regnum++)
|
||||
{
|
||||
if (fsr.regs[regnum])
|
||||
{
|
||||
write_register (regnum, read_memory_integer (fsr.regs[regnum] & 0xFFFF, 2));
|
||||
}
|
||||
}
|
||||
if (fsr.regs[PSW_REGNUM])
|
||||
{
|
||||
write_register (PSW_REGNUM, read_memory_integer (fsr.regs[PSW_REGNUM] & 0xFFFF, 2));
|
||||
}
|
||||
|
||||
/* PC is set to r13 */
|
||||
write_register (PC_REGNUM, r13);
|
||||
/* printf("setting stack to %x\n",fp - frame->size); */
|
||||
write_register (SP_REGNUM, fp - frame->size);
|
||||
flush_cached_frames ();
|
||||
}
|
||||
|
||||
static int
|
||||
check_prologue (op)
|
||||
unsigned short op;
|
||||
{
|
||||
/* st rn, @-sp */
|
||||
if ((op & 0x7E1F) == 0x6C1F)
|
||||
return 1;
|
||||
|
||||
/* st2w rn, @-sp */
|
||||
if ((op & 0x7E3F) == 0x6E1F)
|
||||
return 1;
|
||||
|
||||
/* subi sp, n */
|
||||
if ((op & 0x7FE1) == 0x01E1)
|
||||
return 1;
|
||||
|
||||
/* mv r11, sp */
|
||||
if (op == 0x417E)
|
||||
return 1;
|
||||
|
||||
/* nop */
|
||||
if (op == 0x5E00)
|
||||
return 1;
|
||||
|
||||
/* st rn, @sp */
|
||||
if ((op & 0x7E1F) == 0x681E)
|
||||
return 1;
|
||||
|
||||
/* st2w rn, @sp */
|
||||
if ((op & 0x7E3F) == 0x3A1E)
|
||||
return 1;
|
||||
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
CORE_ADDR
|
||||
d10v_skip_prologue (start_pc)
|
||||
CORE_ADDR start_pc;
|
||||
d10v_skip_prologue (pc)
|
||||
CORE_ADDR pc;
|
||||
{
|
||||
unsigned long op;
|
||||
unsigned short op1, op2;
|
||||
|
||||
if (target_read_memory (pc, (char *)&op, 4))
|
||||
return pc; /* Can't access it -- assume no prologue. */
|
||||
|
||||
while (1)
|
||||
{
|
||||
op = read_memory_integer (pc, 4);
|
||||
if ((op & 0xC0000000) == 0xC0000000)
|
||||
{
|
||||
/* long instruction */
|
||||
if ( ((op & 0x3FFF0000) != 0x01FF0000) && /* add3 sp,sp,n */
|
||||
((op & 0x3F0F0000) != 0x340F0000) && /* st rn, @(offset,sp) */
|
||||
((op & 0x3F1F0000) != 0x350F0000)) /* st2w rn, @(offset,sp) */
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* short instructions */
|
||||
op1 = (op & 0x3FFF8000) >> 15;
|
||||
op2 = op & 0x7FFF;
|
||||
if (!check_prologue(op1) || !check_prologue(op2))
|
||||
break;
|
||||
}
|
||||
pc += 4;
|
||||
}
|
||||
return pc;
|
||||
}
|
||||
|
||||
/* 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
|
||||
INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
|
||||
|
||||
For us, the frame address is its stack pointer value, so we look up
|
||||
the function prologue to determine the caller's sp value, and return it. */
|
||||
|
||||
CORE_ADDR
|
||||
d10v_frame_chain (frame)
|
||||
struct frame_info *frame;
|
||||
{
|
||||
if (!inside_entry_file (frame->pc))
|
||||
return read_memory_integer (FRAME_FP (frame) + frame->f_offset, 4);
|
||||
else
|
||||
return 0;
|
||||
struct frame_saved_regs fsr;
|
||||
/* printf("frame_chain %x\n",frame->frame); */
|
||||
d10v_frame_find_saved_regs (frame, &fsr);
|
||||
/* printf("pc=%x\n",fsr.regs[PC_REGNUM]);
|
||||
printf("fp=%x (%x)\n",fsr.regs[FP_REGNUM],read_memory_integer(fsr.regs[FP_REGNUM],2) & 0xffff); */
|
||||
return read_memory_integer(fsr.regs[FP_REGNUM],2) & 0xffff;
|
||||
}
|
||||
|
||||
static int next_addr;
|
||||
|
||||
static int
|
||||
prologue_find_regs (op, fsr, addr)
|
||||
unsigned short op;
|
||||
struct frame_saved_regs *fsr;
|
||||
CORE_ADDR addr;
|
||||
{
|
||||
int n;
|
||||
|
||||
/* st rn, @-sp */
|
||||
if ((op & 0x7E1F) == 0x6C1F)
|
||||
{
|
||||
n = (op & 0x1E0) >> 5;
|
||||
next_addr -= 2;
|
||||
fsr->regs[n] = next_addr;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* st2w rn, @-sp */
|
||||
else if ((op & 0x7E3F) == 0x6E1F)
|
||||
{
|
||||
n = (op & 0x1E0) >> 5;
|
||||
next_addr -= 4;
|
||||
fsr->regs[n] = next_addr;
|
||||
fsr->regs[n+1] = next_addr+2;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* subi sp, n */
|
||||
if ((op & 0x7FE1) == 0x01E1)
|
||||
{
|
||||
n = (op & 0x1E) >> 1;
|
||||
if (n == 0)
|
||||
n = 16;
|
||||
next_addr -= n;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* mv r11, sp */
|
||||
if (op == 0x417E)
|
||||
return 1;
|
||||
|
||||
/* nop */
|
||||
if (op == 0x5E00)
|
||||
return 1;
|
||||
|
||||
/* st rn, @sp */
|
||||
if ((op & 0x7E1F) == 0x681E)
|
||||
{
|
||||
n = (op & 0x1E0) >> 5;
|
||||
fsr->regs[n] = next_addr;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* st2w rn, @sp */
|
||||
if ((op & 0x7E3F) == 0x3A1E)
|
||||
{
|
||||
n = (op & 0x1E0) >> 5;
|
||||
fsr->regs[n] = next_addr;
|
||||
fsr->regs[n+1] = next_addr+2;
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Put here the code to store, into a struct frame_saved_regs, the
|
||||
addresses of the saved registers of frame described by FRAME_INFO.
|
||||
This includes special registers such as pc and fp saved in special
|
||||
@ -56,7 +243,68 @@ void
|
||||
d10v_frame_find_saved_regs (fi, fsr)
|
||||
struct frame_info *fi;
|
||||
struct frame_saved_regs *fsr;
|
||||
{
|
||||
{
|
||||
CORE_ADDR fp, pc;
|
||||
unsigned long op;
|
||||
unsigned short op1, op2;
|
||||
int i;
|
||||
|
||||
fp = fi->frame;
|
||||
memset (fsr, 0, sizeof (*fsr));
|
||||
next_addr = 0;
|
||||
|
||||
pc = get_pc_function_start (fi->pc);
|
||||
|
||||
while (1)
|
||||
{
|
||||
op = read_memory_integer (pc, 4);
|
||||
if ((op & 0xC0000000) == 0xC0000000)
|
||||
{
|
||||
/* long instruction */
|
||||
if ((op & 0x3FFF0000) == 0x01FF0000)
|
||||
{
|
||||
/* add3 sp,sp,n */
|
||||
short n = op & 0xFFFF;
|
||||
next_addr += n;
|
||||
}
|
||||
else if ((op & 0x3F0F0000) == 0x340F0000)
|
||||
{
|
||||
/* st rn, @(offset,sp) */
|
||||
short offset = op & 0xFFFF;
|
||||
short n = (op >> 20) & 0xF;
|
||||
fsr->regs[n] = next_addr + offset;
|
||||
}
|
||||
else if ((op & 0x3F1F0000) == 0x350F0000)
|
||||
{
|
||||
/* st2w rn, @(offset,sp) */
|
||||
short offset = op & 0xFFFF;
|
||||
short n = (op >> 20) & 0xF;
|
||||
fsr->regs[n] = next_addr + offset;
|
||||
fsr->regs[n+1] = next_addr + offset + 2;
|
||||
}
|
||||
else
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* short instructions */
|
||||
op1 = (op & 0x3FFF8000) >> 15;
|
||||
op2 = op & 0x7FFF;
|
||||
if (!prologue_find_regs(op1,fsr,pc) || !prologue_find_regs(op2,fsr,pc))
|
||||
break;
|
||||
}
|
||||
pc += 4;
|
||||
}
|
||||
|
||||
fi->size = -next_addr;
|
||||
fi->return_pc = read_register (13);
|
||||
|
||||
for (i=0; i<NUM_REGS; i++)
|
||||
if (fsr->regs[i])
|
||||
{
|
||||
fsr->regs[i] = fp - (next_addr - fsr->regs[i]);
|
||||
/* printf("register %d = *(%x) = %x\n",i,fsr->regs[i],read_memory_integer((fsr->regs[i]) & 0xffff, 2)); */
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
@ -65,9 +313,11 @@ d10v_init_extra_frame_info (fromleaf, fi)
|
||||
struct frame_info *fi;
|
||||
{
|
||||
struct frame_saved_regs dummy;
|
||||
if (fi->next)
|
||||
fi->pc = fi->next->return_pc;
|
||||
d10v_frame_find_saved_regs (fi, &dummy);
|
||||
/* printf("extra init %x next=%x pc=%x\n",fi->frame,fi->next,fi->pc); */
|
||||
|
||||
/* fi->pc = fi->next->return_pc; */
|
||||
d10v_frame_find_saved_regs (fi, &dummy);
|
||||
/* printf(" %x next=%x pc=%x\n",fi->frame,fi->next,fi->pc); */
|
||||
}
|
||||
|
||||
static void
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user