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