Imagelibrary/binutils-gdb
1
0
Fork 1
mirror of https://github.com/bminor/binutils-gdb.git synced 2025-12-29 10:30:46 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add support for v4 SystemMode.

Browse Source
This commit is contained in:
Nick Clifton
2000-05-30 17:13:37 +00:00
parent ac73857d80
commit c1a72ffdd6
11 changed files with 159 additions and 57 deletions
Download Patch File Download Diff File Expand all files Collapse all files

93
sim/arm/armsupp.c
View File

@@ -42,7 +42,7 @@ void ARMul_R15Altered (ARMul_State * state);
ARMword ARMul_SwitchMode (ARMul_State * state, ARMword oldmode,
ARMword newmode);
static ARMword ModeToBank (ARMul_State * state, ARMword mode);
static ARMword ModeToBank (ARMword mode);
unsigned ARMul_NthReg (ARMword instr, unsigned number);
@@ -87,7 +87,7 @@ ARMul_GetReg (ARMul_State * state, unsigned mode, unsigned reg)
{
mode &= MODEBITS;
if (mode != state->Mode)
return (state->RegBank[ModeToBank (state, (ARMword) mode)][reg]);
return (state->RegBank[ModeToBank ((ARMword) mode)][reg]);
else
return (state->Reg[reg]);
}
@@ -101,7 +101,7 @@ ARMul_SetReg (ARMul_State * state, unsigned mode, unsigned reg, ARMword value)
{
mode &= MODEBITS;
if (mode != state->Mode)
state->RegBank[ModeToBank (state, (ARMword) mode)][reg] = value;
state->RegBank[ModeToBank ((ARMword) mode)][reg] = value;
else
state->Reg[reg] = value;
}
@@ -233,11 +233,12 @@ ARMul_FixCPSR (ARMul_State * state, ARMword instr, ARMword rhs)
ARMword
ARMul_GetSPSR (ARMul_State * state, ARMword mode)
{
ARMword bank = ModeToBank (state, mode & MODEBITS);
if (bank == USERBANK || bank == DUMMYBANK)
return (CPSR);
else
return (state->Spsr[bank]);
ARMword bank = ModeToBank (mode & MODEBITS);
if (! BANK_CAN_ACCESS_SPSR (bank))
return CPSR;
return state->Spsr[bank];
}
/***************************************************************************\
@@ -247,8 +248,9 @@ ARMul_GetSPSR (ARMul_State * state, ARMword mode)
void
ARMul_SetSPSR (ARMul_State * state, ARMword mode, ARMword value)
{
ARMword bank = ModeToBank (state, mode & MODEBITS);
if (bank != USERBANK && bank != DUMMYBANK)
ARMword bank = ModeToBank (mode & MODEBITS);
if (BANK_CAN_ACCESS_SPSR (bank))
state->Spsr[bank] = value;
}
@@ -259,7 +261,7 @@ ARMul_SetSPSR (ARMul_State * state, ARMword mode, ARMword value)
void
ARMul_FixSPSR (ARMul_State * state, ARMword instr, ARMword rhs)
{
if (state->Bank != USERBANK && state->Bank != DUMMYBANK)
if (BANK_CAN_ACCESS_SPSR (state->Bank))
{
if (BITS (16, 19) == 9)
SETPSR (state->Spsr[state->Bank], rhs);
@@ -282,11 +284,14 @@ ARMul_CPSRAltered (ARMul_State * state)
if (state->prog32Sig == LOW)
state->Cpsr &= (CCBITS | INTBITS | R15MODEBITS);
oldmode = state->Mode;
if (state->Mode != (state->Cpsr & MODEBITS))
{
state->Mode =
ARMul_SwitchMode (state, state->Mode, state->Cpsr & MODEBITS);
state->NtransSig = (state->Mode & 3) ? HIGH : LOW;
}
@@ -317,7 +322,6 @@ ARMul_CPSRAltered (ARMul_State * state)
else
state->Reg[15] = ECC | ER15INT | EMODE | R15PC;
}
}
/***************************************************************************\
@@ -355,23 +359,30 @@ ARMword
ARMul_SwitchMode (ARMul_State * state, ARMword oldmode, ARMword newmode)
{
unsigned i;
oldmode = ModeToBank (state, oldmode);
state->Bank = ModeToBank (state, newmode);
if (oldmode != state->Bank)
ARMword oldbank;
ARMword newbank;
oldbank = ModeToBank (oldmode);
newbank = state->Bank = ModeToBank (newmode);
if (oldbank != newbank)
{ /* really need to do it */
switch (oldmode)
switch (oldbank)
{ /* save away the old registers */
case SYSTEMBANK:
/* The System mode uses the USER bank. */
oldbank = USERBANK;
/* Fall through. */
case USERBANK:
case IRQBANK:
case SVCBANK:
case ABORTBANK:
case UNDEFBANK:
if (state->Bank == FIQBANK)
if (newbank == FIQBANK)
for (i = 8; i < 13; i++)
state->RegBank[USERBANK][i] = state->Reg[i];
state->RegBank[oldmode][13] = state->Reg[13];
state->RegBank[oldmode][14] = state->Reg[14];
state->RegBank[oldbank][13] = state->Reg[13];
state->RegBank[oldbank][14] = state->Reg[14];
break;
case FIQBANK:
for (i = 8; i < 15; i++)
@@ -381,20 +392,25 @@ ARMul_SwitchMode (ARMul_State * state, ARMword oldmode, ARMword newmode)
for (i = 8; i < 15; i++)
state->RegBank[DUMMYBANK][i] = 0;
break;
default:
abort ();
}
switch (state->Bank)
switch (newbank)
{ /* restore the new registers */
case SYSTEMBANK:
newbank = USERBANK;
/* Fall through. */
case USERBANK:
case IRQBANK:
case SVCBANK:
case ABORTBANK:
case UNDEFBANK:
if (oldmode == FIQBANK)
if (oldbank == FIQBANK)
for (i = 8; i < 13; i++)
state->Reg[i] = state->RegBank[USERBANK][i];
state->Reg[13] = state->RegBank[state->Bank][13];
state->Reg[14] = state->RegBank[state->Bank][14];
state->Reg[13] = state->RegBank[newbank][13];
state->Reg[14] = state->RegBank[newbank][14];
break;
case FIQBANK:
for (i = 8; i < 15; i++)
@@ -404,9 +420,12 @@ ARMul_SwitchMode (ARMul_State * state, ARMword oldmode, ARMword newmode)
for (i = 8; i < 15; i++)
state->Reg[i] = 0;
break;
default:
abort ();
} /* switch */
} /* if */
return (newmode);
return newmode;
}
/***************************************************************************\
@@ -415,21 +434,24 @@ ARMul_SwitchMode (ARMul_State * state, ARMword oldmode, ARMword newmode)
\***************************************************************************/
static ARMword
ModeToBank (ARMul_State * state ATTRIBUTE_UNUSED, ARMword mode)
ModeToBank (ARMword mode)
{
static ARMword bankofmode[] = { USERBANK, FIQBANK, IRQBANK, SVCBANK,
static ARMword bankofmode[] =
{
USERBANK, FIQBANK, IRQBANK, SVCBANK,
DUMMYBANK, DUMMYBANK, DUMMYBANK, DUMMYBANK,
DUMMYBANK, DUMMYBANK, DUMMYBANK, DUMMYBANK,
DUMMYBANK, DUMMYBANK, DUMMYBANK, DUMMYBANK,
USERBANK, FIQBANK, IRQBANK, SVCBANK,
USERBANK, FIQBANK, IRQBANK, SVCBANK,
DUMMYBANK, DUMMYBANK, DUMMYBANK, ABORTBANK,
DUMMYBANK, DUMMYBANK, DUMMYBANK, UNDEFBANK
DUMMYBANK, DUMMYBANK, DUMMYBANK, UNDEFBANK,
DUMMYBANK, DUMMYBANK, DUMMYBANK, SYSTEMBANK
};
if (mode > UNDEF32MODE)
return (DUMMYBANK);
else
return (bankofmode[mode]);
if (mode >= (sizeof (bankofmode) / sizeof (bankofmode[0])))
return DUMMYBANK;
return bankofmode[mode];
}
/***************************************************************************\
@@ -650,9 +672,11 @@ ARMul_MCR (ARMul_State * state, ARMword instr, ARMword source)
unsigned cpab;
cpab = (state->MCR[CPNum]) (state, ARMul_FIRST, instr, source);
while (cpab == ARMul_BUSY)
{
ARMul_Icycles (state, 1, 0);
if (IntPending (state))
{
cpab = (state->MCR[CPNum]) (state, ARMul_INTERRUPT, instr, 0);
@@ -661,6 +685,7 @@ ARMul_MCR (ARMul_State * state, ARMword instr, ARMword source)
else
cpab = (state->MCR[CPNum]) (state, ARMul_BUSY, instr, source);
}
if (cpab == ARMul_CANT)
ARMul_Abort (state, ARMul_UndefinedInstrV);
else