Fri Nov 1 13:59:28 1996 Martin M. Hunt <hunt@pizza.cygnus.com>
* d10v-tdep.c, config/d10v/tm-d10v.h: Major fixes to support inferior function calls and proper stack backtracing on D10V-EVA board.
This commit is contained in:
parent
cbcfa12917
commit
21260fe16f
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@ -1,3 +1,11 @@
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start-sanitize-d10v
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Fri Nov 1 13:59:28 1996 Martin M. Hunt <hunt@pizza.cygnus.com>
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* d10v-tdep.c, config/d10v/tm-d10v.h: Major fixes to support
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inferior function calls and proper stack backtracing on D10V-EVA
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board.
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end-sanitize-d10v
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Fri Nov 1 10:50:51 1996 Michael Meissner <meissner@tiktok.cygnus.com>
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* config/powerpc/linux.mh (NATDEPFILES): Fix up things so that it
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149
gdb/d10v-tdep.c
149
gdb/d10v-tdep.c
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@ -45,7 +45,6 @@ d10v_pop_frame ()
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char raw_buffer[8];
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fp = FRAME_FP (frame);
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printf("pop_frame %x\n",(int)fp);
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if (frame->dummy)
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{
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d10v_pop_dummy_frame(frame);
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@ -142,9 +141,28 @@ d10v_skip_prologue (pc)
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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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if ((op & 0xC0000000) == 0x80000000)
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{
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op2 = (op & 0x3FFF8000) >> 15;
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op1 = op & 0x7FFF;
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}
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else
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{
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op1 = (op & 0x3FFF8000) >> 15;
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op2 = op & 0x7FFF;
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}
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if (check_prologue(op1))
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{
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if (!check_prologue(op2))
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{
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/* if the previous opcode was really part of the prologue */
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/* and not just a NOP, then we want to break after both instructions */
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if (op1 != 0x5E00)
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pc += 4;
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break;
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}
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}
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else
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break;
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}
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pc += 4;
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@ -163,19 +181,26 @@ d10v_frame_chain (frame)
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{
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struct frame_saved_regs fsr;
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if (inside_entry_file (frame->pc))
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return 0;
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d10v_frame_find_saved_regs (frame, &fsr);
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if (frame->return_pc == IMEM_START)
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return (CORE_ADDR)0;
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if (!fsr.regs[FP_REGNUM])
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{
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return (CORE_ADDR)fsr.regs[SP_REGNUM]+0x2000000;
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if (!fsr.regs[SP_REGNUM] || fsr.regs[SP_REGNUM] == STACK_START)
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return (CORE_ADDR)0;
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return fsr.regs[SP_REGNUM];
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}
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return read_memory_unsigned_integer(fsr.regs[FP_REGNUM],2)+0x2000000;
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if (!read_memory_unsigned_integer(fsr.regs[FP_REGNUM],2))
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return (CORE_ADDR)0;
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return read_memory_unsigned_integer(fsr.regs[FP_REGNUM],2)| DMEM_START;
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}
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static int next_addr;
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static int next_addr, uses_frame;
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static int
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prologue_find_regs (op, fsr, addr)
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@ -216,7 +241,10 @@ prologue_find_regs (op, fsr, addr)
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/* mv r11, sp */
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if (op == 0x417E)
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{
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uses_frame = 1;
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return 1;
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}
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/* nop */
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if (op == 0x5E00)
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@ -263,6 +291,7 @@ d10v_frame_find_saved_regs (fi, fsr)
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pc = get_pc_function_start (fi->pc);
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uses_frame = 0;
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while (1)
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{
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op = (unsigned long)read_memory_integer (pc, 4);
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@ -296,8 +325,16 @@ d10v_frame_find_saved_regs (fi, fsr)
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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 ((op & 0xC0000000) == 0x80000000)
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{
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op2 = (op & 0x3FFF8000) >> 15;
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op1 = op & 0x7FFF;
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}
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else
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{
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op1 = (op & 0x3FFF8000) >> 15;
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op2 = op & 0x7FFF;
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}
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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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@ -306,26 +343,33 @@ d10v_frame_find_saved_regs (fi, fsr)
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fi->size = -next_addr;
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if (!(fp & 0xffff))
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fp = read_register(SP_REGNUM) | DMEM_START;
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for (i=0; i<NUM_REGS-1; 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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}
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if (fsr->regs[13])
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fi->return_pc = ((read_memory_unsigned_integer(fsr->regs[13],2)-1) << 2) + 0x1000000;
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if (fsr->regs[LR_REGNUM])
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fi->return_pc = ((read_memory_unsigned_integer(fsr->regs[LR_REGNUM],2) - 1) << 2) | IMEM_START;
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else
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fi->return_pc = ((read_register(13) - 1) << 2) + 0x1000000;
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fi->return_pc = ((read_register(LR_REGNUM) - 1) << 2) | IMEM_START;
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/* th SP is not normally (ever?) saved, but check anyway */
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if (!fsr->regs[SP_REGNUM])
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{
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/* if the FP was saved, that means the current FP is valid, */
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/* otherwise, it isn't being used, so we use the SP instead */
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if (fsr->regs[FP_REGNUM])
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if (uses_frame)
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fsr->regs[SP_REGNUM] = read_register(FP_REGNUM) + fi->size;
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else
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fsr->regs[SP_REGNUM] = read_register(SP_REGNUM) + fi->size;
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{
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fsr->regs[SP_REGNUM] = fp + fi->size;
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fi->frameless = 1;
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fsr->regs[FP_REGNUM] = 0;
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}
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}
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}
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@ -336,22 +380,10 @@ d10v_init_extra_frame_info (fromleaf, fi)
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{
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struct frame_saved_regs dummy;
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if (fi->next && (fi->pc == 0))
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if (fi->next && ((fi->pc & 0xffff) == 0))
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fi->pc = fi->next->return_pc;
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/*
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printf("init_extra_frame_info: fi->pc=%x frame=%x PC=%x SP=%x\n",
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(int)fi->pc,(int)fi->frame,(int)read_register(PC_REGNUM)<<2,(int)read_register(SP_REGNUM));
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*/
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d10v_frame_find_saved_regs (fi, &dummy);
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if (!dummy.regs[FP_REGNUM])
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{
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/* printf("init_extra_frame_info: sp=%x size=%x\n",dummy.regs[SP_REGNUM],fi->size);; */
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fi->frame = dummy.regs[SP_REGNUM] - fi->size + 0x2000000;
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d10v_frame_find_saved_regs (fi, &dummy);
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}
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/* printf("init_extra_frame_info end: pc=%x frame=%x\n",(int)fi->pc,(int)fi->frame); */
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d10v_frame_find_saved_regs (fi, &dummy);
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}
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static void
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@ -361,7 +393,7 @@ show_regs (args, from_tty)
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{
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long long num1, num2;
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printf_filtered ("PC=%04x (0x%x) PSW=%04x RPT_S=%04x RPT_E=%04x RPT_C=%04x\n",
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read_register (PC_REGNUM), read_register (PC_REGNUM) << 2,
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read_register (PC_REGNUM), (read_register (PC_REGNUM) << 2) + IMEM_START,
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read_register (PSW_REGNUM),
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read_register (24),
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read_register (25),
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@ -432,7 +464,7 @@ d10v_read_pc (pid)
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void
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d10v_write_pc (val, pid)
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LONGEST val;
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CORE_ADDR val;
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int pid;
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{
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int save_pid;
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@ -444,19 +476,19 @@ d10v_write_pc (val, pid)
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}
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CORE_ADDR
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d10v_read_fp ()
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d10v_read_sp ()
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{
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return (read_register(FP_REGNUM) + 0x2000000);
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return (read_register(SP_REGNUM) | DMEM_START);
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}
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void
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d10v_write_fp (val)
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LONGEST val;
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d10v_write_sp (val)
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CORE_ADDR val;
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{
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write_register (FP_REGNUM, val & 0xffff);
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write_register (SP_REGNUM, (LONGEST)(val & 0xffff));
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}
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void
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CORE_ADDR
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d10v_fix_call_dummy (dummyname, start_sp, fun, nargs, args, type, gcc_p)
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char *dummyname;
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CORE_ADDR start_sp;
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struct type *type;
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int gcc_p;
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{
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int regnum, i;
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int regnum;
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CORE_ADDR sp;
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char buffer[MAX_REGISTER_RAW_SIZE];
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struct frame_info *frame = get_current_frame ();
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frame->dummy = 1;
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printf("D10v_fix_call_dummy: %x %x %d frame=%x\n",(int)start_sp,(int)fun,nargs,(int)frame->frame);
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start_sp |= DMEM_START;
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sp = start_sp;
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for (regnum = 0; regnum < NUM_REGS-1; regnum++)
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for (regnum = 0; regnum < NUM_REGS; regnum++)
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{
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sp -= REGISTER_RAW_SIZE(regnum);
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store_address (buffer, REGISTER_RAW_SIZE(regnum), read_register(regnum));
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write_memory (sp, buffer, REGISTER_RAW_SIZE(regnum));
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sp -= REGISTER_RAW_SIZE(regnum);
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}
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write_register (SP_REGNUM, (LONGEST)sp);
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printf("writing %x to sp\n",(int)sp);
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write_register (SP_REGNUM, (LONGEST)(sp & 0xffff));
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/* now we need to load LR with the return address */
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write_register (LR_REGNUM, (LONGEST)d10v_call_dummy_address()>>2);
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write_register (LR_REGNUM, (LONGEST)(d10v_call_dummy_address() & 0xffff) >> 2);
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return sp;
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}
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static void
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d10v_pop_dummy_frame (fi)
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struct frame_info *fi;
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{
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printf("pop_dummy_frame: start_sp=%x\n",(int)fi->frame);
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/*
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sp = start_sp;
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for (regnum = 0; regnum < NUM_REGS-1; regnum++)
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CORE_ADDR sp = fi->frame;
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int regnum;
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for (regnum = NUM_REGS-1; regnum >= 0; regnum--)
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{
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store_address (buffer, REGISTER_RAW_SIZE(regnum), read_register(regnum));
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write_memory (sp, buffer, REGISTER_RAW_SIZE(regnum));
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sp -= REGISTER_RAW_SIZE(regnum);
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write_register(regnum, read_memory_unsigned_integer (sp, REGISTER_RAW_SIZE(regnum)));
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sp += REGISTER_RAW_SIZE(regnum);
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}
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*/
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target_store_registers (-1);
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flush_cached_frames ();
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write_register(SP_REGNUM, sp & 0xffff);
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}
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@ -532,11 +567,11 @@ d10v_push_arguments (nargs, args, sp, struct_return, struct_addr)
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len = TYPE_LENGTH (arg_type);
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contents = VALUE_CONTENTS(arg);
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val = extract_signed_integer (contents, len);
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printf("arg %d: len=%d contents=%x\n",i,len,(int)val);
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if (len == 4)
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write_register (regnum++, val>>16);
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write_register (regnum++, val & 0xffff);
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}
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return sp;
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}
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@ -568,7 +603,5 @@ d10v_extract_return_value (valtype, regbuf, valbuf)
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char regbuf[REGISTER_BYTES];
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char *valbuf;
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{
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printf("EXTRACT: regbuf=%x, *regbuf=%x %x %x %x len=%d %d\n",(int)regbuf,*(int *)regbuf,
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*(int *)(regbuf+4),*(int *)(regbuf+8),*(int *)(regbuf+12),TYPE_LENGTH (valtype),REGISTER_BYTE (2) );
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memcpy (valbuf, regbuf + REGISTER_BYTE (2), TYPE_LENGTH (valtype));
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}
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