Fix disassembly of 8-bit branch displacements (sign extend).
Fix invalid array references disassembling float instructions. Make the system stack pointer visible in show regs. Make "sr" a proper short, remove some junk...
This commit is contained in:
gwr
parent
21a1e8e747
commit
2e0e96ea27
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@ -1,4 +1,4 @@
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/* $NetBSD: db_disasm.c,v 1.11 1994/10/26 07:51:03 cgd Exp $ */
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/* $NetBSD: db_disasm.c,v 1.12 1994/11/14 20:53:52 gwr Exp $ */
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/*
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* Copyright (c) 1994 Christian E. Hopps
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@ -184,27 +184,6 @@ db_disasm(loc, moto_syntax)
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dbuf.dasm[0] = 0;
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dbuf.info[0] = 0;
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#if 0
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/* This is now done in db_examine. */
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diff = INT_MAX;
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sym = db_search_symbol(loc, DB_STGY_PROC, &diff);
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db_symbol_values(sym, &symname, 0);
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/* addstr(&dbuf, "["); */
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if (symname == NULL)
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printu (&dbuf, loc, SIZE_LONG);
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else if (diff == 0) {
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addstr(&dbuf, symname);
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iprintu(&dbuf, loc, SIZE_LONG);
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iaddstr(&dbuf, ":: ");
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} else {
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addstr(&dbuf, symname);
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addstr(&dbuf, "+");
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printu(&dbuf, diff, SIZE_LONG);
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}
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addstr(&dbuf, ": ");
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#endif
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opc = *dbuf.val;
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dbuf.used++;
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@ -873,23 +852,22 @@ opcode_branch(dbuf, opc)
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disp = BITFIELD(opc,7,0);
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if (disp == 0) {
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/* 16-bit signed displacement */
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disp = *(dbuf->val + 1);
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dbuf->used++;
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sz = SIZE_WORD;
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#if 0 /* XXX Note GNU as doesn't like this */
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addchar('w');
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#endif
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} else if (disp == 0xff) {
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/* 32-bit signed displacement */
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disp = *(long *)(dbuf->val + 1);
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dbuf->used += 2;
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sz = SIZE_LONG;
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addchar('l');
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} else {
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disp = *((char *)dbuf->val + 1);
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/*
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* XXX gas chokes on this, I am not sure if
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* XXX it can even be made to emit it (short of .word)
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*/
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/* 8-bit signed displacement in opcode. */
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/* Needs to be sign-extended... */
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if (ISBITSET(disp,7))
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disp -= 256;
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sz = SIZE_BYTE;
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addchar('b');
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}
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@ -1594,6 +1572,9 @@ opcode_fpu(dbuf, opc)
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}
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}
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/*
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* XXX - This screws up on: fmovem a0@(312),fpcr/fpsr/fpi
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*/
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void
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opcode_fmove_ext(dbuf, opc, ext)
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dis_buffer_t *dbuf;
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@ -2771,7 +2752,7 @@ make_cond(dbuf, bit, base)
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const char *ccs;
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cc = BITFIELD(*dbuf->val,bit,bit-3);
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ccs = cc_table[cc];
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ccs = cc_table[cc&15];
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addstr(dbuf, base);
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addstr(dbuf, ccs);
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@ -2782,7 +2763,7 @@ print_fcond(dbuf, cp)
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dis_buffer_t *dbuf;
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char cp;
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{
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addstr(dbuf,fpcc_table[cp]);
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addstr(dbuf,fpcc_table[cp&31]); /* XXX - not 63 ?*/
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}
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void
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@ -2790,7 +2771,7 @@ print_mcond(dbuf, cp)
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dis_buffer_t *dbuf;
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char cp;
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{
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addstr(dbuf,mmcc_table[cp]);
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addstr(dbuf,mmcc_table[cp&15]);
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}
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/*
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@ -1,4 +1,4 @@
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/* $NetBSD: db_interface.c,v 1.9 1994/10/26 07:51:08 cgd Exp $ */
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/* $NetBSD: db_interface.c,v 1.10 1994/11/14 20:53:54 gwr Exp $ */
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/*
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* Mach Operating System
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@ -43,6 +43,7 @@
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extern jmp_buf *db_recover;
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int db_active = 0;
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int ddb_regs_ssp; /* system stack pointer */
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/*
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* Received keyboard interrupt sequence.
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@ -78,17 +79,25 @@ kdb_trap(type, regs)
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}
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}
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/* Should switch to kdb's own stack here. */
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/* XXX - Should switch to kdb's own stack here. */
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ddb_regs = *regs;
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/* Get System Stack Pointer (SSP) */
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ddb_regs_ssp = (int)(®s[1]);
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db_active++;
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cnpollc(TRUE);
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/* (void) setvideoenable(1);*/
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#if 0
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/* XXX - Should do this in cnpollc() if needed. */
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(void) setvideoenable(1);
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#endif
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db_trap(type, 0);
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cnpollc(FALSE);
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db_active--;
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/* Can't easily honor change in ssp. Oh well. */
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*regs = ddb_regs;
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/*
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@ -1,4 +1,4 @@
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/* $NetBSD: db_trace.c,v 1.10 1994/10/26 07:51:09 cgd Exp $ */
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/* $NetBSD: db_trace.c,v 1.11 1994/11/14 20:53:55 gwr Exp $ */
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/*
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* Mach Operating System
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@ -41,6 +41,8 @@ jmp_buf *db_recover;
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/*
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* Register list
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*/
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static int db_var_short(struct db_variable *, db_expr_t *, int);
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extern int ddb_regs_ssp;
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struct db_variable db_regs[] = {
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{ "d0", (int *)&ddb_regs.d0, FCN_NULL },
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{ "d1", (int *)&ddb_regs.d1, FCN_NULL },
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@ -57,12 +59,24 @@ struct db_variable db_regs[] = {
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{ "a4", (int *)&ddb_regs.a4, FCN_NULL },
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{ "a5", (int *)&ddb_regs.a5, FCN_NULL },
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{ "a6", (int *)&ddb_regs.a6, FCN_NULL },
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{ "sp", (int *)&ddb_regs.sp, FCN_NULL },
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{ "ssp",&ddb_regs_ssp, FCN_NULL },
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{ "usp",(int *)&ddb_regs.sp, FCN_NULL },
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{ "pc", (int *)&ddb_regs.pc, FCN_NULL },
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{ "sr", (int *)&ddb_regs.sr, FCN_NULL }
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{ "sr", (int *)&ddb_regs.sr, db_var_short }
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};
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struct db_variable *db_eregs = db_regs + sizeof(db_regs)/sizeof(db_regs[0]);
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static int db_var_short(varp, valp, op)
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struct db_variable *varp;
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db_expr_t *valp;
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int op;
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{
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if (op == DB_VAR_GET)
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*valp = (db_expr_t) *((short*)varp->valuep);
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else
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*((short*)varp->valuep) = (short) *valp;
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}
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#define MAXINT 0x7fffffff
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#define INKERNEL(va) (((vm_offset_t)(va)) >= VM_MIN_KERNEL_ADDRESS && \
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