mirror of https://github.com/acidanthera/audk.git
More progress on the disassebler lib
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9909 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
parent
778449055f
commit
7c34497d5d
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@ -17,6 +17,8 @@
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#include <Library/BaseLib.h>
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#include <Library/PrintLib.h>
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extern CHAR8 *gCondition[];
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extern CHAR8 *gReg[];
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#define LOAD_STORE_FORMAT1 1
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@ -24,7 +26,8 @@ extern CHAR8 *gReg[];
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#define LOAD_STORE_FORMAT3 3
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#define LOAD_STORE_FORMAT4 4
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#define LOAD_STORE_MULTIPLE_FORMAT1 5
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#define LOAD_STORE_MULTIPLE_FORMAT2 6
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#define PUSH_FORMAT 6
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#define POP_FORMAT 106
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#define IMMED_8 7
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#define CONDITIONAL_BRANCH 8
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#define UNCONDITIONAL_BRANCH 9
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@ -42,6 +45,10 @@ extern CHAR8 *gReg[];
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#define CPS_FORMAT 20
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#define ENDIAN_FORMAT 21
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#define B_T3 200
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#define B_T4 201
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#define BL_T2 202
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typedef struct {
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CHAR8 *Start;
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@ -60,8 +67,8 @@ THUMB_INSTRUCTIONS gOpThumb[] = {
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{ "ADD" , 0x1800, 0xfe00, DATA_FORMAT1 },
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{ "ADD" , 0x4400, 0xff00, DATA_FORMAT8 }, // A8.6.9
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{ "ADD" , 0xa000, 0xf100, DATA_FORMAT6_PC },
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{ "ADD" , 0xa100, 0xf100, DATA_FORMAT6_SP },
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{ "ADD" , 0xb000, 0xff10, DATA_FORMAT7 },
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{ "ADD" , 0xa800, 0xf800, DATA_FORMAT6_SP },
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{ "ADD" , 0xb000, 0xff80, DATA_FORMAT7 },
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{ "AND" , 0x4000, 0xffc0, DATA_FORMAT5 },
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@ -69,22 +76,20 @@ THUMB_INSTRUCTIONS gOpThumb[] = {
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{ "ASR" , 0x4100, 0xffc0, DATA_FORMAT5 },
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{ "B" , 0xd000, 0xf000, CONDITIONAL_BRANCH },
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{ "B" , 0xe000, 0xf100, UNCONDITIONAL_BRANCH_SHORT },
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{ "BL" , 0xf100, 0xf100, UNCONDITIONAL_BRANCH },
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{ "BLX" , 0xe100, 0xf100, UNCONDITIONAL_BRANCH },
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{ "B" , 0xe000, 0xf800, UNCONDITIONAL_BRANCH_SHORT },
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{ "BLX" , 0x4780, 0xff80, BRANCH_EXCHANGE },
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{ "BX" , 0x4700, 0xff80, BRANCH_EXCHANGE },
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{ "BX" , 0x4700, 0xff87, BRANCH_EXCHANGE },
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{ "BIC" , 0x4380, 0xffc0, DATA_FORMAT5 },
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{ "BKPT", 0xdf00, 0xff00, IMMED_8 },
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{ "CMN" , 0x42c0, 0xffc0, DATA_FORMAT5 },
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{ "CMP" , 0x2800, 0xf100, DATA_FORMAT3 },
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{ "CMP" , 0x2800, 0xf800, DATA_FORMAT3 },
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{ "CMP" , 0x4280, 0xffc0, DATA_FORMAT5 },
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{ "CMP" , 0x4500, 0xff00, DATA_FORMAT8 },
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{ "CPS" , 0xb660, 0xffe8, CPS_FORMAT },
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{ "CPY" , 0x4600, 0xff00, DATA_FORMAT8 },
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{ "MOV" , 0x4600, 0xff00, DATA_FORMAT8 },
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{ "EOR" , 0x4040, 0xffc0, DATA_FORMAT5 },
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{ "LDMIA" , 0xc800, 0xf800, LOAD_STORE_MULTIPLE_FORMAT1 },
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@ -99,12 +104,13 @@ THUMB_INSTRUCTIONS gOpThumb[] = {
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{ "LDRSB" , 0x5600, 0xfe00, LOAD_STORE_FORMAT2 },
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{ "LDRSH" , 0x5e00, 0xfe00, LOAD_STORE_FORMAT2 },
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{ "MOVS", 0x0000, 0xffc0, DATA_FORMAT5 }, // LSL with imm5 == 0 is a MOVS, so this must go before LSL
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{ "LSL" , 0x0000, 0xf800, DATA_FORMAT4 },
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{ "LSL" , 0x4080, 0xffc0, DATA_FORMAT5 },
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{ "LSR" , 0x0001, 0xf800, DATA_FORMAT4 },
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{ "LSR" , 0x40c0, 0xffc0, DATA_FORMAT5 },
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{ "MOV" , 0x2000, 0xf800, DATA_FORMAT3 },
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{ "MOVS", 0x2000, 0xf800, DATA_FORMAT3 },
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{ "MOV" , 0x1c00, 0xffc0, DATA_FORMAT3 },
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{ "MOV" , 0x4600, 0xff00, DATA_FORMAT8 },
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@ -112,16 +118,16 @@ THUMB_INSTRUCTIONS gOpThumb[] = {
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{ "MVN" , 0x41c0, 0xffc0, DATA_FORMAT5 },
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{ "NEG" , 0x4240, 0xffc0, DATA_FORMAT5 },
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{ "ORR" , 0x4180, 0xffc0, DATA_FORMAT5 },
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{ "POP" , 0xbc00, 0xfe00, LOAD_STORE_MULTIPLE_FORMAT2 },
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{ "POP" , 0xe400, 0xfe00, LOAD_STORE_MULTIPLE_FORMAT2 },
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{ "POP" , 0xbc00, 0xfe00, POP_FORMAT },
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{ "PUSH", 0xb400, 0xfe00, PUSH_FORMAT },
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{ "REV" , 0xba00, 0xffc0, DATA_FORMAT5 },
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{ "REV16" , 0xba40, 0xffc0, DATA_FORMAT5 },
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{ "REVSH" , 0xbac0, 0xffc0, DATA_FORMAT5 },
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{ "ROR" , 0x41c0, 0xffc0, DATA_FORMAT5 },
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{ "SBC" , 0x4180, 0xffc0, DATA_FORMAT5 },
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{ "SETEND" , 0xb650, 0xfff0, ENDIAN_FORMAT },
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{ "ROR" , 0x41c0, 0xffc0, DATA_FORMAT5 },
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{ "SBC" , 0x4180, 0xffc0, DATA_FORMAT5 },
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{ "SETEND" , 0xb650, 0xfff0, ENDIAN_FORMAT },
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{ "STMIA" , 0xc000, 0xf800, LOAD_STORE_MULTIPLE_FORMAT1 },
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{ "STR" , 0x6000, 0xf800, LOAD_STORE_FORMAT1 },
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@ -146,9 +152,13 @@ THUMB_INSTRUCTIONS gOpThumb[] = {
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{ "UXTH", 0xb280, 0xffc0, DATA_FORMAT5 }
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};
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#if 0
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THUMB_INSTRUCTIONS gOpThumb2[] = {
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,
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{ "B", 0xf0008000, 0xf800d000, B_T3 },
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{ "B", 0xf0009000, 0xf800d000, B_T4 },
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{ "BL", 0xf000d000, 0xf800d000, B_T4 },
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{ "BLX", 0xf000c000, 0xf800d000, BL_T2 }
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#if 0
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// 32-bit Thumb instructions op1 01
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@ -195,14 +205,14 @@ THUMB_INSTRUCTIONS gOpThumb2[] = {
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// 1111 1 011 0xxx xxxx xxxx xxxx xxxx xxxx Multiply
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// 1111 1 011 1xxx xxxx xxxx xxxx xxxx xxxx Long Multiply
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// 1111 1 1xx xxxx xxxx xxxx xxxx xxxx xxxx Coprocessor
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};
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#endif
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};
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CHAR8 mThumbMregListStr[4*15 + 1];
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CHAR8 *
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ThumbMRegList (
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UINT32 OpCode
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UINT32 RegBitMask
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)
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{
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UINTN Index, Start, End;
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@ -213,10 +223,10 @@ ThumbMRegList (
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*Str = '\0';
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AsciiStrCat (Str, "{");
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// R0 - R7, PC
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for (Index = 0, First = TRUE; Index <= 9; Index++) {
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if ((OpCode & (1 << Index)) != 0) {
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for (Index = 0, First = TRUE; Index <= 15; Index++) {
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if ((RegBitMask & (1 << Index)) != 0) {
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Start = End = Index;
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for (Index++; ((OpCode & (1 << Index)) != 0) && (Index <= 9); Index++) {
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for (Index++; ((RegBitMask & (1 << Index)) != 0) && (Index <= 9); Index++) {
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End = Index;
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}
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@ -227,12 +237,11 @@ ThumbMRegList (
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}
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if (Start == End) {
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AsciiStrCat (Str, gReg[(Start == 9)?15:Start]);
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AsciiStrCat (Str, ", ");
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AsciiStrCat (Str, gReg[Start]);
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} else {
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AsciiStrCat (Str, gReg[Start]);
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AsciiStrCat (Str, "-");
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AsciiStrCat (Str, gReg[(End == 9)?15:End]);
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AsciiStrCat (Str, gReg[End]);
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}
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}
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}
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@ -246,11 +255,21 @@ ThumbMRegList (
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}
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UINT32
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SignExtend (
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IN UINT32 Data
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SignExtend32 (
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IN UINT32 Data,
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IN UINT32 TopBit
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)
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{
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return 0;
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if (((Data & TopBit) == 0) || (TopBit == BIT31)) {
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return Data;
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}
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do {
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TopBit <<= 1;
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Data |= TopBit;
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} while ((TopBit & BIT31) != BIT31);
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return Data;
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}
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/**
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@ -276,19 +295,20 @@ DisassembleThumbInstruction (
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{
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UINT16 *OpCodePtr;
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UINT16 OpCode;
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UINT16 OpCode32;
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UINT32 OpCode32;
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UINT32 Index;
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UINT32 Offset;
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UINT16 Rd, Rn, Rm;
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INT32 target_addr;
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BOOLEAN H1, H2, imod;
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UINT32 PC;
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UINT32 PC, Target;
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CHAR8 *Cond;
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BOOLEAN S, J1, J2;
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OpCodePtr = *OpCodePtrPtr;
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OpCode = **OpCodePtrPtr;
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// Thumb2 is a stream of 16-bit instructions not a 32-bit instruction.
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OpCode32 = (OpCode << 16) | *(OpCodePtr + 1);
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OpCode32 = (((UINT32)OpCode) << 16) | *(OpCodePtr + 1);
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// These register names match branch form, but not others
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Rd = OpCode & 0x7;
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H1 = (OpCode & BIT7) != 0;
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H2 = (OpCode & BIT6) != 0;
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imod = (OpCode & BIT4) != 0;
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PC = (UINT32)(UINTN)*OpCodePtr;
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PC = (UINT32)(UINTN)OpCodePtr;
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// Increment by the minimum instruction size, Thumb2 could be bigger
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*OpCodePtrPtr += 1;
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for (Index = 0; Index < sizeof (gOpThumb)/sizeof (THUMB_INSTRUCTIONS); Index++) {
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if ((OpCode & gOpThumb[Index].Mask) == gOpThumb[Index].OpCode) {
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if (Extended) {
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Offset = AsciiSPrint (Buf, Size, "0x%04x %a", OpCode, gOpThumb[Index].Start);
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Offset = AsciiSPrint (Buf, Size, "0x%04x %-6a", OpCode, gOpThumb[Index].Start);
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} else {
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Offset = AsciiSPrint (Buf, Size, "%a", gOpThumb[Index].Start);
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Offset = AsciiSPrint (Buf, Size, "%-6a", gOpThumb[Index].Start);
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}
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switch (gOpThumb[Index].AddressMode) {
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case LOAD_STORE_FORMAT1:
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// A6.5.1 <Rd>, [<Rn>, #<5_bit_offset>]
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [r%d #0x%x]", Rd, (OpCode >> 7) & 7, (OpCode >> 6) & 0x1f);
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break;
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [r%d #0x%x]", Rd, Rn, (OpCode >> 4) & 0x7c);
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return;
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case LOAD_STORE_FORMAT2:
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// A6.5.1 <Rd>, [<Rn>, <Rm>]
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [r%d, r%d]", Rd, (OpCode >> 3) & 7, Rm);
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break;
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [r%d, r%d]", Rd, Rn, Rm);
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return;
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case LOAD_STORE_FORMAT3:
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// A6.5.1 <Rd>, [PC, #<8_bit_offset>]
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [pc, #0x%x]", (OpCode >> 8) & 7, OpCode & 0xff);
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break;
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Target = (OpCode & 0xff) << 2;
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [pc, #0x%x] ;0x%08x", (OpCode >> 8) & 7, Target, PC + 4 + Target);
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return;
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case LOAD_STORE_FORMAT4:
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// FIX ME!!!!!
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [sp, #0x%x]", (OpCode >> 8) & 7, OpCode & 0xff);
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break;
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// Rt, [SP, #imm8]
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Target = (OpCode & 0xff) << 2;
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [sp, #0x%x]", (OpCode >> 8) & 7, Target, PC + 3 + Target);
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return;
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case LOAD_STORE_MULTIPLE_FORMAT1:
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// <Rn>!, <registers>
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d!, %a", (OpCode >> 8) & 7, ThumbMRegList (!BIT8 & OpCode));
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break;
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case LOAD_STORE_MULTIPLE_FORMAT2:
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// <Rn>!, <registers>
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// BIT8 is PC
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d!, %a", (OpCode >> 8) & 7, ThumbMRegList (OpCode));
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break;
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// <Rn>!, {r0-r7}
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d!, %a", (OpCode >> 8) & 7, ThumbMRegList (OpCode & 0xff));
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return;
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case POP_FORMAT:
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// POP {r0-r7,pc}
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AsciiSPrint (&Buf[Offset], Size - Offset, " %a", ThumbMRegList ((OpCode & 0xff) | ((OpCode & BIT8) == BIT8 ? BIT15 : 0)));
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return;
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case PUSH_FORMAT:
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// PUSH {r0-r7,lr}
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AsciiSPrint (&Buf[Offset], Size - Offset, " %a", ThumbMRegList ((OpCode & 0xff) | ((OpCode & BIT8) == BIT8 ? BIT14 : 0)));
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return;
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case IMMED_8:
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// A6.7 <immed_8>
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AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%x", OpCode & 0xff);
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break;
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return;
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case CONDITIONAL_BRANCH:
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// A6.3.1 B<cond> <target_address>
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AsciiSPrint (&Buf[Offset], Size - Offset, "%a 0x%04x", PC + 4 + SignExtend ((OpCode & 0xff) << 1));
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break;
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// Patch in the condition code. A little hack but based on "%-6a"
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Cond = gCondition[(OpCode >> 8) & 0xf];
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Buf[Offset-5] = *Cond++;
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Buf[Offset-4] = *Cond;
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AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%04x", PC + 4 + SignExtend32 ((OpCode & 0xff) << 1, BIT8));
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return;
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case UNCONDITIONAL_BRANCH_SHORT:
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// A6.3.2 B <target_address>
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AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%04x", PC + 4 + SignExtend ((OpCode & 0x3ff) << 1));
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break;
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case UNCONDITIONAL_BRANCH:
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// A6.3.2 BL|BLX <target_address> ; Produces two 16-bit instructions
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target_addr = *(OpCodePtr - 1);
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if ((target_addr & 0xf800) == 0xf000) {
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target_addr = ((target_addr & 0x3ff) << 12) | (OpCode & 0x3ff);
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} else {
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target_addr = OpCode & 0x3ff;
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}
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// PC + 2 +/- target_addr
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AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%04x", PC + 2 + SignExtend (target_addr));
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break;
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AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%04x", PC + 4 + SignExtend32 ((OpCode & 0x3ff) << 1, BIT11));
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return;
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case BRANCH_EXCHANGE:
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// A6.3.3 BX|BLX <Rm>
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d", gReg[Rn | (H2 ? 8:0)]);
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break;
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AsciiSPrint (&Buf[Offset], Size - Offset, " %a", gReg[Rn | (H2 ? 8:0)]);
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return;
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case DATA_FORMAT1:
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// A6.4.3 <Rd>, <Rn>, <Rm>
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, r%d, r%d", Rd, Rn, Rm);
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break;
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return;
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case DATA_FORMAT2:
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// A6.4.3 <Rd>, <Rn>, #3_bit_immed
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, r%d, 0x%x", Rd, Rn, Rm);
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break;
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return;
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case DATA_FORMAT3:
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// A6.4.3 <Rd>|<Rn>, #8_bit_immed
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, r%d, 0x%x", (OpCode >> 8) & 0x7, OpCode & 0xff);
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break;
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// A6.4.3 <Rd>|<Rn>, #imm8
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, #0x%x", (OpCode >> 8) & 7, OpCode & 0xff);
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return;
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case DATA_FORMAT4:
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// A6.4.3 <Rd>|<Rm>, #immed_5
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, r%d, 0x%x", Rn, Rd, (OpCode >> 6) & 0x1f);
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break;
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return;
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case DATA_FORMAT5:
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// A6.4.3 <Rd>|<Rm>, <Rm>|<Rs>
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, r%d", Rd, Rn);
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break;
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return;
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case DATA_FORMAT6_SP:
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// A6.4.3 <Rd>, <reg>, #<8_Bit_immed>
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, sp, 0x%x", (OpCode >> 8) & 7, OpCode & 0xff);
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break;
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, sp, 0x%x", (OpCode >> 8) & 7, (OpCode & 0xff) << 2);
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return;
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case DATA_FORMAT6_PC:
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// A6.4.3 <Rd>, <reg>, #<8_Bit_immed>
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AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, pc, 0x%x", (OpCode >> 8) & 7, OpCode & 0xff);
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break;
|
||||
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, pc, 0x%x", (OpCode >> 8) & 7, (OpCode & 0xff) << 2);
|
||||
return;
|
||||
case DATA_FORMAT7:
|
||||
// A6.4.3 SP, SP, #<7_Bit_immed>
|
||||
AsciiSPrint (&Buf[Offset], Size - Offset, " sp, sp 0x%x", (OpCode & 0x7f)*4);
|
||||
break;
|
||||
AsciiSPrint (&Buf[Offset], Size - Offset, " sp, sp, 0x%x", (OpCode & 0x7f)*4);
|
||||
return;
|
||||
case DATA_FORMAT8:
|
||||
// A6.4.3 <Rd>|<Rn>, <Rm>
|
||||
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a", gReg[Rd | (H1 ? 8:0)], gReg[Rn | (H2 ? 8:0)]);
|
||||
break;
|
||||
return;
|
||||
|
||||
case CPS_FORMAT:
|
||||
// A7.1.24
|
||||
AsciiSPrint (&Buf[Offset], Size - Offset, "%a %a%a%a", imod ? "ID":"IE", ((OpCode & BIT2) == 0) ? "":"a", ((OpCode & BIT1) == 0) ? "":"i", ((OpCode & BIT0) == 0) ? "":"f");
|
||||
break;
|
||||
return;
|
||||
|
||||
case ENDIAN_FORMAT:
|
||||
// A7.1.24
|
||||
AsciiSPrint (&Buf[Offset], Size - Offset, " %a", (OpCode & BIT3) == 0 ? "LE":"BE");
|
||||
break;
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
#if 0
|
||||
|
||||
|
||||
// Thumb2 are 32-bit instructions
|
||||
*OpCodePtrPtr += 1;
|
||||
for (Index = 0; Index < sizeof (gOpThumb2)/sizeof (THUMB_INSTRUCTIONS); Index++) {
|
||||
if ((OpCode32 & gOpThumb2[Index].Mask) == gOpThumb2[Index].OpCode) {
|
||||
if (Extended) {
|
||||
Offset = AsciiSPrint (Buf, Size, "0x%04x %a", OpCode32, gOpThumb2[Index].Start);
|
||||
Offset = AsciiSPrint (Buf, Size, "0x%04x %-6a", OpCode32, gOpThumb2[Index].Start);
|
||||
} else {
|
||||
Offset = AsciiSPrint (Buf, Size, "%a", gOpThumb2[Index].Start);
|
||||
Offset = AsciiSPrint (Buf, Size, " %-6a", gOpThumb2[Index].Start);
|
||||
}
|
||||
switch (gOpThumb2[Index].AddressMode) {
|
||||
case B_T3:
|
||||
Cond = gCondition[(OpCode32 >> 22) & 0xf];
|
||||
Buf[Offset-5] = *Cond++;
|
||||
Buf[Offset-4] = *Cond;
|
||||
// S:J2:J1:imm6:imm11:0
|
||||
Target = ((OpCode32 << 1) & 0xffe) + ((OpCode32 >> 4) & 0x3f000);
|
||||
Target |= (OpCode & BIT11) ? BIT18 : 0; // J2
|
||||
Target |= (OpCode & BIT13) ? BIT17 : 0; // J1
|
||||
Target |= (OpCode & BIT26) ? BIT19 : 0; // S
|
||||
Target = SignExtend32 (Target, BIT19);
|
||||
AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%08x", Target);
|
||||
return;
|
||||
case B_T4:
|
||||
// S:I1:I2:imm10:imm11:0
|
||||
Target = ((OpCode32 << 1) & 0xffe) + ((OpCode32 >> 4) & 0x3ff000);
|
||||
S = (OpCode & BIT26);
|
||||
J1 = (OpCode & BIT13);
|
||||
J2 = (OpCode & BIT11);
|
||||
Target |= !(J2 ^ S) ? BIT21 : 0; // I2
|
||||
Target |= !(J1 ^ S) ? BIT22 : 0; // I1
|
||||
Target |= (OpCode & BIT26) ? BIT23 : 0; // S
|
||||
Target = SignExtend32 (Target, BIT23);
|
||||
AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%08x", Target);
|
||||
return;
|
||||
|
||||
case BL_T2:
|
||||
// S:I1:I2:imm10:imm11:0
|
||||
Target = ((OpCode32 << 2) & 0x1ffc) + ((OpCode32 >> 3) & 0x7fe000);
|
||||
S = (OpCode & BIT26);
|
||||
J1 = (OpCode & BIT13);
|
||||
J2 = (OpCode & BIT11);
|
||||
Target |= !(J2 ^ S) ? BIT22 : 0; // I2
|
||||
Target |= !(J1 ^ S) ? BIT23 : 0; // I1
|
||||
Target |= (OpCode & BIT26) ? BIT24 : 0; // S
|
||||
Target = SignExtend32 (Target, BIT24);
|
||||
AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%08x", Target);
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
// Unknown instruction is 16-bits
|
||||
*OpCodePtrPtr -= 1;
|
||||
if (!Extended) {
|
||||
AsciiSPrint (Buf, Size, "0x%04x", OpCode);
|
||||
}
|
||||
|
||||
AsciiSPrint (Buf, Size, "0x%08x", OpCode32);
|
||||
}
|
||||
|
||||
|
||||
|
|
Loading…
Reference in New Issue