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add symbolic info for branch target disasm when available

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This commit is contained in:
Stanislav Shwartsman 2020-02-21 19:08:25 +00:00
parent 086f2779f5
commit c61d595106
1 changed files with 48 additions and 11 deletions
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59
bochs/disasm/dis_groups.cc
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@ -24,9 +24,9 @@
#include "disasm.h"
#include "osdep.h"
#if BX_DEBUGGER && 0
#if BX_DEBUGGER
#include "../bx_debug/debug.h"
#define SYMBOLIC_JUMP(fmt) fmt " (%s)"
#define SYMBOLIC_JUMP(fmt) fmt " %s"
#define GET_SYMBOL(addr) bx_dbg_disasm_symbolic_address((addr), 0)
#else
#define SYMBOLIC_JUMP(fmt) fmt "%s"
@ -40,20 +40,57 @@
#define BX_64BIT_REG_RDI BX_32BIT_REG_EDI
#endif
#if BX_DEBUGGER
extern "C" {
bx_address bx_dbg_get_laddr(Bit16u sel, bx_address ofs);
}
#endif
void disassembler::Apw(const x86_insn *insn)
{
Bit16u imm16 = fetch_word();
Bit16u cs_selector = fetch_word();
dis_sprintf("0x%04x:%04x", (unsigned) cs_selector, (unsigned) imm16);
#if BX_DEBUGGER
// get the linear adress from the selector/offset adress
bx_address laddr = bx_dbg_get_laddr(cs_selector, imm16);
// get the symbol
const char *ptStrSymbol = bx_dbg_disasm_symbolic_address(laddr, 0);
if (ptStrSymbol != NULL)
{
// with global symbol
dis_sprintf("0x%04x:%04x <%s>", (unsigned) cs_selector, (unsigned) imm16, ptStrSymbol);
}
else
#endif
{
// as usual
dis_sprintf("0x%04x:%04x", (unsigned) cs_selector, (unsigned) imm16);
}
}
void disassembler::Apd(const x86_insn *insn)
{
Bit32u imm32 = fetch_dword();
Bit16u cs_selector = fetch_word();
dis_sprintf("0x%04x:%08x", (unsigned) cs_selector, (unsigned) imm32);
}
#if BX_DEBUGGER
bx_address laddr = bx_dbg_get_laddr(cs_selector, imm32);
const char *ptStrSymbol = bx_dbg_disasm_symbolic_address(laddr, 0);
if (ptStrSymbol != NULL)
{
// with global symbol
dis_sprintf("0x%04x:%08x <%s>", (unsigned) cs_selector, (unsigned) imm32, ptStrSymbol);
}
else
#endif
{
// as usual
dis_sprintf("0x%04x:%08x", (unsigned) cs_selector, (unsigned) imm32);
}
}
// 8-bit general purpose registers
void disassembler::AL_Reg(const x86_insn *insn) { dis_sprintf("%s", general_8bit_regname[BX_8BIT_REG_AL]); }
void disassembler::CL_Reg(const x86_insn *insn) { dis_sprintf("%s", general_8bit_regname[BX_8BIT_REG_CL]); }
@ -664,7 +701,7 @@ void disassembler::Jb(const x86_insn *insn)
Bit64u imm64 = (Bit8s) imm8;
Bit64u target = db_eip + imm64;
sym = GET_SYMBOL(target);
sym = sym ? sym : "<unknown>";
sym = sym ? sym : "";
if (offset_mode_hex) {
dis_sprintf(SYMBOLIC_JUMP(".+0x" FMT_ADDRX64), imm64, sym);
@ -684,7 +721,7 @@ void disassembler::Jb(const x86_insn *insn)
Bit32u imm32 = (Bit8s) imm8;
Bit32u target = (Bit32u)(db_cs_base + db_eip + (Bit32s) imm32);
sym = GET_SYMBOL(target);
sym = sym ? sym : "<unknown>";
sym = sym ? sym : "";
if (offset_mode_hex) {
dis_sprintf(SYMBOLIC_JUMP(".+0x%08x"), (unsigned) imm32, sym);
@ -701,7 +738,7 @@ void disassembler::Jb(const x86_insn *insn)
Bit16u imm16 = (Bit8s) imm8;
Bit16u target = (Bit16u)((db_eip + (Bit16s) imm16) & 0xffff);
sym = GET_SYMBOL(target);
sym = sym ? sym : "<unknown>";
sym = sym ? sym : "";
if (offset_mode_hex) {
dis_sprintf(SYMBOLIC_JUMP(".+0x%04x"), (unsigned) imm16, sym);
@ -726,7 +763,7 @@ void disassembler::Jw(const x86_insn *insn)
Bit16u target = (db_eip + imm16) & 0xffff;
sym = GET_SYMBOL(target);
sym = sym ? sym : "<unknown>";
sym = sym ? sym : "";
if (offset_mode_hex) {
dis_sprintf(SYMBOLIC_JUMP(".+0x%04x"),
(unsigned) (Bit16u) imm16, sym);
@ -749,7 +786,7 @@ void disassembler::Jd(const x86_insn *insn)
Bit64u imm64 = (Bit32s) imm32;
Bit64u target = db_eip + (Bit64s) imm64;
sym = GET_SYMBOL(target);
sym = sym ? sym : "<unknown>";
sym = sym ? sym : "";
if (offset_mode_hex) {
dis_sprintf(SYMBOLIC_JUMP(".+0x" FMT_ADDRX64),
@ -768,7 +805,7 @@ void disassembler::Jd(const x86_insn *insn)
Bit32u target = (Bit32u)(db_cs_base + db_eip + (Bit32s) imm32);
sym = GET_SYMBOL(target);
sym = sym ? sym : "<unknown>";
sym = sym ? sym : "";
if (offset_mode_hex) {
dis_sprintf(SYMBOLIC_JUMP(".+0x%08x"), (unsigned) imm32, sym);
}