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Backtrace formatting cleanup

pull/1/head
Scott Lahteine 7 years ago
parent
902c885782
commit
4b25543633
2 changed files with 79 additions and 80 deletions
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  1. 6
      Marlin/src/backtrace/unwarm.cpp
  2. 153
      Marlin/src/backtrace/unwarm_arm.cpp

6
Marlin/src/backtrace/unwarm.cpp
View File

@ -46,7 +46,7 @@ void UnwInvalidateRegisterFile(RegData *regFile) {
do {
regFile[t].o = REG_VAL_INVALID;
t++;
} while(t < 13);
} while (t < 13);
}
@ -107,7 +107,7 @@ bool UnwReportRetAddr(UnwState * const state, uint32_t addr) {
// Scan backwards until we find the function name
uint32_t v;
while(state->cb->readW(pf-4,&v)) {
while (state->cb->readW(pf-4,&v)) {
// Check if name descriptor is valid
if ((v & 0xFFFFFF00) == 0xFF000000 && (v & 0xFF) > 1) {
@ -118,7 +118,7 @@ bool UnwReportRetAddr(UnwState * const state, uint32_t addr) {
}
// Go backwards to the previous word
pf -= 4;;
pf -= 4;
}
}

153
Marlin/src/backtrace/unwarm_arm.cpp
View File

@ -33,18 +33,18 @@
*/
static bool isDataProc(uint32_t instr) {
uint8_t opcode = (instr & 0x01e00000) >> 21;
uint8_t opcode = (instr & 0x01E00000) >> 21;
bool S = (instr & 0x00100000) ? true : false;
if((instr & 0xfc000000) != 0xe0000000) {
if ((instr & 0xFC000000) != 0xE0000000) {
return false;
} else
if(!S && opcode >= 8 && opcode <= 11) {
}
else if (!S && opcode >= 8 && opcode <= 11) {
/* TST, TEQ, CMP and CMN all require S to be set */
return false;
} else {
return true;
}
else
return true;
}
UnwResult UnwStartArm(UnwState * const state) {
@ -56,20 +56,20 @@ UnwResult UnwStartArm(UnwState * const state) {
uint32_t instr;
/* Attempt to read the instruction */
if(!state->cb->readW(state->regData[15].v, &instr)) {
if (!state->cb->readW(state->regData[15].v, &instr)) {
return UNWIND_IREAD_W_FAIL;
}
UnwPrintd4("A %x %x %08x:", state->regData[13].v, state->regData[15].v, instr);
/* Check that the PC is still on Arm alignment */
if(state->regData[15].v & 0x3) {
if (state->regData[15].v & 0x3) {
UnwPrintd1("\nError: PC misalignment\n");
return UNWIND_INCONSISTENT;
}
/* Check that the SP and PC have not been invalidated */
if(!M_IsOriginValid(state->regData[13].o) || !M_IsOriginValid(state->regData[15].o)) {
if (!M_IsOriginValid(state->regData[13].o) || !M_IsOriginValid(state->regData[15].o)) {
UnwPrintd1("\nError: PC or SP invalidated\n");
return UNWIND_INCONSISTENT;
}
@ -78,12 +78,12 @@ UnwResult UnwStartArm(UnwState * const state) {
* This is tested prior to data processing to prevent
* mis-interpretation as an invalid TEQ instruction.
*/
if((instr & 0xfffffff0) == 0xe12fff10) {
uint8_t rn = instr & 0xf;
if ((instr & 0xFFFFFFF0) == 0xE12FFF10) {
uint8_t rn = instr & 0xF;
UnwPrintd4("BX r%d\t ; r%d %s\n", rn, rn, M_Origin2Str(state->regData[rn].o));
if(!M_IsOriginValid(state->regData[rn].o)) {
if (!M_IsOriginValid(state->regData[rn].o)) {
UnwPrintd1("\nUnwind failure: BX to untracked register\n");
return UNWIND_FAILURE;
}
@ -92,19 +92,18 @@ UnwResult UnwStartArm(UnwState * const state) {
state->regData[15].v = state->regData[rn].v;
/* Check if the return value is from the stack */
if(state->regData[rn].o == REG_VAL_FROM_STACK) {
if (state->regData[rn].o == REG_VAL_FROM_STACK) {
/* Now have the return address */
UnwPrintd2(" Return PC=%x\n", state->regData[15].v & (~0x1));
/* Report the return address */
if(!UnwReportRetAddr(state, state->regData[rn].v)) {
return UNWIND_TRUNCATED;
}
if (!UnwReportRetAddr(state, state->regData[rn].v))
return UNWIND_TRUNCATED;
}
/* Determine the return mode */
if(state->regData[rn].v & 0x1) {
if (state->regData[rn].v & 0x1) {
/* Branching to THUMB */
return UnwStartThumb(state);
@ -118,16 +117,16 @@ UnwResult UnwStartArm(UnwState * const state) {
}
}
/* Branch */
else if((instr & 0xff000000) == 0xea000000) {
else if ((instr & 0xFF000000) == 0xEA000000) {
int32_t offset = (instr & 0x00ffffff);
int32_t offset = (instr & 0x00FFFFFF);
/* Shift value */
offset = offset << 2;
/* Sign extend if needed */
if(offset & 0x02000000) {
offset |= 0xfc000000;
if (offset & 0x02000000) {
offset |= 0xFC000000;
}
UnwPrintd2("B %d\n", offset);
@ -142,11 +141,11 @@ UnwResult UnwStartArm(UnwState * const state) {
}
/* MRS */
else if((instr & 0xffbf0fff) == 0xe10f0000) {
else if ((instr & 0xFFBF0FFF) == 0xE10F0000) {
#if defined(UNW_DEBUG)
bool R = (instr & 0x00400000) ? true : false;
#endif
uint8_t rd = (instr & 0x0000f000) >> 12;
uint8_t rd = (instr & 0x0000F000) >> 12;
UnwPrintd4("MRS r%d,%s\t; r%d invalidated", rd, R ? "SPSR" : "CPSR", rd);
@ -154,7 +153,7 @@ UnwResult UnwStartArm(UnwState * const state) {
state->regData[rd].o = REG_VAL_INVALID;
}
/* MSR */
else if((instr & 0xffb0f000) == 0xe120f000) {
else if ((instr & 0xFFB0F000) == 0xE120F000) {
#if defined(UNW_DEBUG)
bool R = (instr & 0x00400000) ? true : false;
@ -170,15 +169,15 @@ UnwResult UnwStartArm(UnwState * const state) {
*/
}
/* Data processing */
else if(isDataProc(instr)) {
else if (isDataProc(instr)) {
bool I = (instr & 0x02000000) ? true : false;
uint8_t opcode = (instr & 0x01e00000) >> 21;
uint8_t opcode = (instr & 0x01E00000) >> 21;
#if defined(UNW_DEBUG)
bool S = (instr & 0x00100000) ? true : false;
#endif
uint8_t rn = (instr & 0x000f0000) >> 16;
uint8_t rd = (instr & 0x0000f000) >> 12;
uint16_t operand2 = (instr & 0x00000fff);
uint8_t rn = (instr & 0x000F0000) >> 16;
uint8_t rd = (instr & 0x0000F000) >> 12;
uint16_t operand2 = (instr & 0x00000FFF);
uint32_t op2val;
int op2origin;
@ -203,8 +202,8 @@ UnwResult UnwStartArm(UnwState * const state) {
/* Decode operand 2 */
if (I) {
uint8_t shiftDist = (operand2 & 0x0f00) >> 8;
uint8_t shiftConst = (operand2 & 0x00ff);
uint8_t shiftDist = (operand2 & 0x0F00) >> 8;
uint8_t shiftConst = (operand2 & 0x00FF);
/* rotate const right by 2 * shiftDist */
shiftDist *= 2;
@ -217,7 +216,7 @@ UnwResult UnwStartArm(UnwState * const state) {
else {
/* Register and shift */
uint8_t rm = (operand2 & 0x000f);
uint8_t rm = (operand2 & 0x000F);
uint8_t regShift = (operand2 & 0x0010) ? true : false;
uint8_t shiftType = (operand2 & 0x0060) >> 5;
uint32_t shiftDist;
@ -227,16 +226,16 @@ UnwResult UnwStartArm(UnwState * const state) {
UnwPrintd2("r%d ", rm);
/* Get the shift distance */
if(regShift) {
if (regShift) {
uint8_t rs = (operand2 & 0x0f00) >> 8;
uint8_t rs = (operand2 & 0x0F00) >> 8;
if(operand2 & 0x00800) {
if (operand2 & 0x00800) {
UnwPrintd1("\nError: Bit should be zero\n");
return UNWIND_ILLEGAL_INSTR;
}
else if(rs == 15) {
else if (rs == 15) {
UnwPrintd1("\nError: Cannot use R15 with register shift\n");
return UNWIND_ILLEGAL_INSTR;
@ -249,10 +248,10 @@ UnwResult UnwStartArm(UnwState * const state) {
UnwPrintd7("%s r%d\t; r%d %s r%d %s", shiftMnu[shiftType], rs, rm, M_Origin2Str(state->regData[rm].o), rs, M_Origin2Str(state->regData[rs].o));
}
else {
shiftDist = (operand2 & 0x0f80) >> 7;
shiftDist = (operand2 & 0x0F80) >> 7;
op2origin = REG_VAL_FROM_CONST;
if(shiftDist) {
if (shiftDist) {
UnwPrintd3("%s #%d", shiftMnu[shiftType], shiftDist);
}
UnwPrintd3("\t; r%d %s", rm, M_Origin2Str(state->regData[rm].o));
@ -265,7 +264,7 @@ UnwResult UnwStartArm(UnwState * const state) {
break;
case 1: /* logical right */
if(!regShift && shiftDist == 0) {
if (!regShift && shiftDist == 0) {
shiftDist = 32;
}
@ -273,19 +272,19 @@ UnwResult UnwStartArm(UnwState * const state) {
break;
case 2: /* arithmetic right */
if(!regShift && shiftDist == 0) {
if (!regShift && shiftDist == 0) {
shiftDist = 32;
}
if(state->regData[rm].v & 0x80000000) {
if (state->regData[rm].v & 0x80000000) {
/* Register shifts maybe greater than 32 */
if(shiftDist >= 32) {
op2val = 0xffffffff;
if (shiftDist >= 32) {
op2val = 0xFFFFFFFF;
}
else {
op2val = state->regData[rm].v >> shiftDist;
op2val |= 0xffffffff << (32 - shiftDist);
op2val |= 0xFFFFFFFF << (32 - shiftDist);
}
}
else {
@ -295,7 +294,7 @@ UnwResult UnwStartArm(UnwState * const state) {
case 3: /* rotate right */
if(!regShift && shiftDist == 0) {
if (!regShift && shiftDist == 0) {
/* Rotate right with extend.
* This uses the carry bit and so always has an
* untracked result.
@ -305,7 +304,7 @@ UnwResult UnwStartArm(UnwState * const state) {
}
else {
/* Limit shift distance to 0-31 incase of register shift */
shiftDist &= 0x1f;
shiftDist &= 0x1F;
op2val = (state->regData[rm].v >> shiftDist) |
(state->regData[rm].v << (32 - shiftDist));
@ -318,7 +317,7 @@ UnwResult UnwStartArm(UnwState * const state) {
}
/* Decide the data origin */
if(M_IsOriginValid(op2origin) &&
if (M_IsOriginValid(op2origin) &&
M_IsOriginValid(state->regData[rm].o)) {
op2origin = state->regData[rm].o;
@ -338,7 +337,7 @@ UnwResult UnwStartArm(UnwState * const state) {
case 4: /* ADD: Rd:= Op1 + Op2 */
case 12: /* ORR: Rd:= Op1 OR Op2 */
case 14: /* BIC: Rd:= Op1 AND NOT Op2 */
if(!M_IsOriginValid(state->regData[rn].o) ||
if (!M_IsOriginValid(state->regData[rn].o) ||
!M_IsOriginValid(op2origin)) {
state->regData[rd].o = REG_VAL_INVALID;
}
@ -368,14 +367,14 @@ UnwResult UnwStartArm(UnwState * const state) {
}
/* Account for pre-fetch by temporarily adjusting PC */
if(rn == 15) {
if (rn == 15) {
/* If the shift amount is specified in the instruction,
* the PC will be 8 bytes ahead. If a register is used
* to specify the shift amount the PC will be 12 bytes
* ahead.
*/
if(!I && (operand2 & 0x0010))
if (!I && (operand2 & 0x0010))
state->regData[rn].v += 12;
else
state->regData[rn].v += 8;
@ -430,8 +429,8 @@ UnwResult UnwStartArm(UnwState * const state) {
}
/* Remove the prefetch offset from the PC */
if(rd != 15 && rn == 15) {
if(!I && (operand2 & 0x0010))
if (rd != 15 && rn == 15) {
if (!I && (operand2 & 0x0010))
state->regData[rn].v -= 12;
else
state->regData[rn].v -= 8;
@ -441,22 +440,22 @@ UnwResult UnwStartArm(UnwState * const state) {
/* Block Data Transfer
* LDM, STM
*/
else if((instr & 0xfe000000) == 0xe8000000) {
else if ((instr & 0xFE000000) == 0xE8000000) {
bool P = (instr & 0x01000000) ? true : false;
bool U = (instr & 0x00800000) ? true : false;
bool S = (instr & 0x00400000) ? true : false;
bool W = (instr & 0x00200000) ? true : false;
bool L = (instr & 0x00100000) ? true : false;
uint16_t baseReg = (instr & 0x000f0000) >> 16;
uint16_t regList = (instr & 0x0000ffff);
uint16_t baseReg = (instr & 0x000F0000) >> 16;
uint16_t regList = (instr & 0x0000FFFF);
uint32_t addr = state->regData[baseReg].v;
bool addrValid = M_IsOriginValid(state->regData[baseReg].o);
int8_t r;
#if defined(UNW_DEBUG)
/* Display the instruction */
if(L) {
if (L) {
UnwPrintd6("LDM%c%c r%d%s, {reglist}%s\n", P ? 'E' : 'F', U ? 'D' : 'A', baseReg, W ? "!" : "", S ? "^" : "");
}
else {
@ -467,15 +466,15 @@ UnwResult UnwStartArm(UnwState * const state) {
* this is a load including the PC when the S-bit indicates that
* that CPSR is loaded from SPSR (also untracked, but ignored).
*/
if(S && (!L || (regList & (0x01 << 15)) == 0)) {
if (S && (!L || (regList & (0x01 << 15)) == 0)) {
UnwPrintd1("\nError:S-bit set requiring banked registers\n");
return UNWIND_FAILURE;
}
else if(baseReg == 15) {
else if (baseReg == 15) {
UnwPrintd1("\nError: r15 used as base register\n");
return UNWIND_FAILURE;
}
else if(regList == 0) {
else if (regList == 0) {
UnwPrintd1("\nError: Register list empty\n");
return UNWIND_FAILURE;
}
@ -488,21 +487,21 @@ UnwResult UnwStartArm(UnwState * const state) {
do {
/* Check if the register is to be transferred */
if(regList & (0x01 << r)) {
if (regList & (0x01 << r)) {
if(P)
if (P)
addr += U ? 4 : -4;
if(L) {
if (L) {
if(addrValid) {
if (addrValid) {
if(!UnwMemReadRegister(state, addr, &state->regData[r])) {
if (!UnwMemReadRegister(state, addr, &state->regData[r])) {
return UNWIND_DREAD_W_FAIL;
}
/* Update the origin if read via the stack pointer */
if(M_IsOriginValid(state->regData[r].o) && baseReg == 13) {
if (M_IsOriginValid(state->regData[r].o) && baseReg == 13) {
state->regData[r].o = REG_VAL_FROM_STACK;
}
@ -517,8 +516,8 @@ UnwResult UnwStartArm(UnwState * const state) {
}
}
else {
if(addrValid) {
if(!UnwMemWriteRegister(state, state->regData[13].v, &state->regData[r])) {
if (addrValid) {
if (!UnwMemWriteRegister(state, state->regData[13].v, &state->regData[r])) {
return UNWIND_DWRITE_W_FAIL;
}
}
@ -526,36 +525,36 @@ UnwResult UnwStartArm(UnwState * const state) {
UnwPrintd2(" R%d = 0x%08x\n", r);
}
if(!P)
if (!P)
addr += U ? 4 : -4;
}
/* Check the next register */
r += U ? 1 : -1;
} while(r >= 0 && r <= 15);
} while (r >= 0 && r <= 15);
/* Check the writeback bit */
if(W)
if (W)
state->regData[baseReg].v = addr;
/* Check if the PC was loaded */
if(L && (regList & (0x01 << 15))) {
if(!M_IsOriginValid(state->regData[15].o)) {
if (L && (regList & (0x01 << 15))) {
if (!M_IsOriginValid(state->regData[15].o)) {
/* Return address is not valid */
UnwPrintd1("PC popped with invalid address\n");
return UNWIND_FAILURE;
}
else {
/* Store the return address */
if(!UnwReportRetAddr(state, state->regData[15].v)) {
if (!UnwReportRetAddr(state, state->regData[15].v)) {
return UNWIND_TRUNCATED;
}
UnwPrintd2(" Return PC=0x%x", state->regData[15].v);
/* Determine the return mode */
if(state->regData[15].v & 0x1) {
if (state->regData[15].v & 0x1) {
/* Branching to THUMB */
return UnwStartThumb(state);
}
@ -578,7 +577,7 @@ UnwResult UnwStartArm(UnwState * const state) {
UnwPrintd1("\n");
/* Should never hit the reset vector */
if(state->regData[15].v == 0) return UNWIND_RESET;
if (state->regData[15].v == 0) return UNWIND_RESET;
/* Check next address */
state->regData[15].v += 4;
@ -587,10 +586,10 @@ UnwResult UnwStartArm(UnwState * const state) {
UnwMemHashGC(state);
t--;
if(t == 0)
if (t == 0)
return UNWIND_EXHAUSTED;
} while(!found);
} while (!found);
return UNWIND_UNSUPPORTED;
}

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