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-rw-r--r--engines/sci/engine/game.cpp2
-rw-r--r--engines/sci/engine/kevent.cpp12
-rw-r--r--engines/sci/engine/kmisc.cpp4
-rw-r--r--engines/sci/engine/scriptdebug.cpp97
-rw-r--r--engines/sci/engine/state.cpp2
-rw-r--r--engines/sci/engine/state.h2
-rw-r--r--engines/sci/engine/vm.cpp283
-rw-r--r--engines/sci/engine/vm.h46
8 files changed, 197 insertions, 251 deletions
diff --git a/engines/sci/engine/game.cpp b/engines/sci/engine/game.cpp
index 861294cfa6..5b4c30f6b3 100644
--- a/engines/sci/engine/game.cpp
+++ b/engines/sci/engine/game.cpp
@@ -365,7 +365,7 @@ int script_init_engine(EngineState *s) {
s->r_acc = s->r_prev = NULL_REG;
- s->r_amp_rest = 0;
+ s->restAdjust = 0;
s->_executionStack.clear(); // Start without any execution stack
s->execution_stack_base = -1; // No vm is running yet
diff --git a/engines/sci/engine/kevent.cpp b/engines/sci/engine/kevent.cpp
index 744a965ef3..c4b3f5d71a 100644
--- a/engines/sci/engine/kevent.cpp
+++ b/engines/sci/engine/kevent.cpp
@@ -88,12 +88,12 @@ reg_t kGetEvent(EngineState *s, int funct_nr, int argc, reg_t *argv) {
case SCI_EVT_KEYBOARD:
if ((e.buckybits & SCI_EVM_LSHIFT) && (e.buckybits & SCI_EVM_RSHIFT) && (e.data == '-')) {
printf("Debug mode activated\n");
- debugState.seeking = kDebugSeekNothing;
- debugState.runningStep = 0;
+ scriptState.seeking = kDebugSeekNothing;
+ scriptState.runningStep = 0;
} else if ((e.buckybits & SCI_EVM_CTRL) && (e.data == '`')) {
printf("Debug mode activated\n");
- debugState.seeking = kDebugSeekNothing;
- debugState.runningStep = 0;
+ scriptState.seeking = kDebugSeekNothing;
+ scriptState.runningStep = 0;
} else {
PUT_SEL32V(obj, type, SCI_EVT_KEYBOARD); // Keyboard event
s->r_acc = make_reg(0, 1);
@@ -137,8 +137,8 @@ reg_t kGetEvent(EngineState *s, int funct_nr, int argc, reg_t *argv) {
s->r_acc = NULL_REG; // Unknown or no event
}
- if ((s->r_acc.offset) && (debugState.stopOnEvent)) {
- debugState.stopOnEvent = false;
+ if ((s->r_acc.offset) && (scriptState.stopOnEvent)) {
+ scriptState.stopOnEvent = false;
// A SCI event occured, and we have been asked to stop, so open the debug console
Console *con = ((Sci::SciEngine*)g_engine)->getSciDebugger();
diff --git a/engines/sci/engine/kmisc.cpp b/engines/sci/engine/kmisc.cpp
index 8381bc2e13..7e0aca5b7a 100644
--- a/engines/sci/engine/kmisc.cpp
+++ b/engines/sci/engine/kmisc.cpp
@@ -96,8 +96,8 @@ reg_t kFlushResources(EngineState *s, int funct_nr, int argc, reg_t *argv) {
reg_t kSetDebug(EngineState *s, int funct_nr, int argc, reg_t *argv) {
printf("Debug mode activated\n");
- debugState.seeking = kDebugSeekNothing;
- debugState.runningStep = 0;
+ scriptState.seeking = kDebugSeekNothing;
+ scriptState.runningStep = 0;
return s->r_acc;
}
diff --git a/engines/sci/engine/scriptdebug.cpp b/engines/sci/engine/scriptdebug.cpp
index d5f0a21385..9f69d21e2a 100644
--- a/engines/sci/engine/scriptdebug.cpp
+++ b/engines/sci/engine/scriptdebug.cpp
@@ -34,7 +34,7 @@ namespace Sci {
extern const char *selector_name(EngineState *s, int selector);
-DebugState debugState;
+ScriptState scriptState;
int propertyOffsetToId(EngineState *s, int prop_ofs, reg_t objp) {
Object *obj = obj_get(s, objp);
@@ -97,11 +97,6 @@ reg_t disassemble(EngineState *s, reg_t pos, int print_bw_tag, int print_bytecod
opsize = scr[pos.offset];
opcode = opsize >> 1;
- if (!debugState.isValid) {
- warning("Not in debug state");
- return retval;
- }
-
opsize &= 1; // byte if true, word if false
printf("%04x:%04x: ", PRINT_REG(pos));
@@ -226,11 +221,11 @@ reg_t disassemble(EngineState *s, reg_t pos, int print_bw_tag, int print_bytecod
}
}
- if (pos == *debugState.p_pc) { // Extra information if debugging the current opcode
+ if (pos == scriptState.xs->addr.pc) { // Extra information if debugging the current opcode
if ((opcode == op_pTos) || (opcode == op_sTop) || (opcode == op_pToa) || (opcode == op_aTop) ||
(opcode == op_dpToa) || (opcode == op_ipToa) || (opcode == op_dpTos) || (opcode == op_ipTos)) {
int prop_ofs = scr[pos.offset + 1];
- int prop_id = propertyOffsetToId(s, prop_ofs, *debugState.p_objp);
+ int prop_id = propertyOffsetToId(s, prop_ofs, scriptState.xs->objp);
printf(" (%s)", selector_name(s, prop_id));
}
@@ -238,38 +233,38 @@ reg_t disassemble(EngineState *s, reg_t pos, int print_bw_tag, int print_bytecod
printf("\n");
- if (pos == *debugState.p_pc) { // Extra information if debugging the current opcode
+ if (pos == scriptState.xs->addr.pc) { // Extra information if debugging the current opcode
if (opcode == op_callk) {
- int stackframe = (scr[pos.offset + 2] >> 1) + (*debugState.p_restadjust);
- int argc = ((*debugState.p_sp)[- stackframe - 1]).offset;
+ int stackframe = (scr[pos.offset + 2] >> 1) + (scriptState.restadjust);
+ int argc = ((scriptState.xs->sp)[- stackframe - 1]).offset;
if (!s->_kernel->hasOldScriptHeader())
- argc += (*debugState.p_restadjust);
+ argc += (scriptState.restadjust);
printf(" Kernel params: (");
for (int j = 0; j < argc; j++) {
- printf("%04x:%04x", PRINT_REG((*debugState.p_sp)[j - stackframe]));
+ printf("%04x:%04x", PRINT_REG((scriptState.xs->sp)[j - stackframe]));
if (j + 1 < argc)
printf(", ");
}
printf(")\n");
} else if ((opcode == op_send) || (opcode == op_self)) {
- int restmod = *debugState.p_restadjust;
+ int restmod = scriptState.restadjust;
int stackframe = (scr[pos.offset + 1] >> 1) + restmod;
- reg_t *sb = *debugState.p_sp;
+ reg_t *sb = scriptState.xs->sp;
uint16 selector;
reg_t fun_ref;
while (stackframe > 0) {
int argc = sb[- stackframe + 1].offset;
const char *name = NULL;
- reg_t called_obj_addr = *debugState.p_objp;
+ reg_t called_obj_addr = scriptState.xs->objp;
if (opcode == op_send)
called_obj_addr = s->r_acc;
else if (opcode == op_self)
- called_obj_addr = *debugState.p_objp;
+ called_obj_addr = scriptState.xs->objp;
selector = sb[- stackframe].offset;
@@ -313,45 +308,30 @@ reg_t disassemble(EngineState *s, reg_t pos, int print_bw_tag, int print_bytecod
}
-void script_debug(EngineState *s, reg_t *pc, StackPtr *sp, StackPtr *pp, reg_t *objp, int *restadjust,
- SegmentId *segids, reg_t **variables, reg_t **variables_base, int *variables_nr, int bp) {
+void script_debug(EngineState *s, bool bp) {
// Do we support a separate console?
- bool old_debugstate = debugState.isValid;
-
- debugState.p_var_segs = segids;
- debugState.p_vars = variables;
- debugState.p_var_max = variables_nr;
- debugState.p_var_base = variables_base;
- debugState.p_pc = pc;
- debugState.p_sp = sp;
- debugState.p_pp = pp;
- debugState.p_objp = objp;
- debugState.p_restadjust = restadjust;
printf("%d: acc=%04x:%04x ", script_step_counter, PRINT_REG(s->r_acc));
- debugState.isValid = true;
- disassemble(s, *pc, 0, 1);
- if (debugState.seeking == kDebugSeekGlobal)
- printf("Global %d (0x%x) = %04x:%04x\n", debugState.seekSpecial,
- debugState.seekSpecial, PRINT_REG(s->script_000->locals_block->_locals[debugState.seekSpecial]));
-
- debugState.isValid = old_debugstate;
+ disassemble(s, scriptState.xs->addr.pc, 0, 1);
+ if (scriptState.seeking == kDebugSeekGlobal)
+ printf("Global %d (0x%x) = %04x:%04x\n", scriptState.seekSpecial,
+ scriptState.seekSpecial, PRINT_REG(s->script_000->locals_block->_locals[scriptState.seekSpecial]));
- if (debugState.seeking && !bp) { // Are we looking for something special?
- MemObject *mobj = GET_SEGMENT(*s->seg_manager, pc->segment, MEM_OBJ_SCRIPT);
+ if (scriptState.seeking && !bp) { // Are we looking for something special?
+ MemObject *mobj = GET_SEGMENT(*s->seg_manager, scriptState.xs->addr.pc.segment, MEM_OBJ_SCRIPT);
if (mobj) {
Script *scr = (Script *)mobj;
byte *code_buf = scr->buf;
int code_buf_size = scr->buf_size;
- int opcode = pc->offset >= code_buf_size ? 0 : code_buf[pc->offset];
+ int opcode = scriptState.xs->addr.pc.offset >= code_buf_size ? 0 : code_buf[scriptState.xs->addr.pc.offset];
int op = opcode >> 1;
- int paramb1 = pc->offset + 1 >= code_buf_size ? 0 : code_buf[pc->offset + 1];
- int paramf1 = (opcode & 1) ? paramb1 : (pc->offset + 2 >= code_buf_size ? 0 : (int16)READ_LE_UINT16(code_buf + pc->offset + 1));
+ int paramb1 = scriptState.xs->addr.pc.offset + 1 >= code_buf_size ? 0 : code_buf[scriptState.xs->addr.pc.offset + 1];
+ int paramf1 = (opcode & 1) ? paramb1 : (scriptState.xs->addr.pc.offset + 2 >= code_buf_size ? 0 : (int16)READ_LE_UINT16(code_buf + scriptState.xs->addr.pc.offset + 1));
- switch (debugState.seeking) {
+ switch (scriptState.seeking) {
case kDebugSeekSpecialCallk:
- if (paramb1 != debugState.seekSpecial)
+ if (paramb1 != scriptState.seekSpecial)
return;
case kDebugSeekCallk: {
@@ -361,7 +341,7 @@ void script_debug(EngineState *s, reg_t *pc, StackPtr *sp, StackPtr *pp, reg_t *
}
case kDebugSeekLevelRet: {
- if ((op != op_ret) || (debugState.seekLevel < (int)s->_executionStack.size()-1))
+ if ((op != op_ret) || (scriptState.seekLevel < (int)s->_executionStack.size()-1))
return;
break;
}
@@ -373,7 +353,7 @@ void script_debug(EngineState *s, reg_t *pc, StackPtr *sp, StackPtr *pp, reg_t *
return; // param or temp
if ((op & 0x3) && s->_executionStack.back().local_segment > 0)
return; // locals and not running in script.000
- if (paramf1 != debugState.seekSpecial)
+ if (paramf1 != scriptState.seekSpecial)
return; // CORRECT global?
break;
@@ -382,32 +362,17 @@ void script_debug(EngineState *s, reg_t *pc, StackPtr *sp, StackPtr *pp, reg_t *
break;
case kDebugSeekNothing:
- // FIXME: Unhandled?
+ // We seek nothing, so just continue
break;
}
- debugState.seeking = kDebugSeekNothing;
+ scriptState.seeking = kDebugSeekNothing;
// OK, found whatever we were looking for
}
}
-
- debugState.isValid = (debugState.runningStep == 0);
-
- if (debugState.isValid) {
- debugState.p_pc = pc;
- debugState.p_sp = sp;
- debugState.p_pp = pp;
- debugState.p_objp = objp;
- debugState.p_restadjust = restadjust;
- debugState.p_var_segs = segids;
- debugState.p_vars = variables;
- debugState.p_var_max = variables_nr;
- debugState.p_var_base = variables_base;
-
- printf("Step #%d\n", script_step_counter);
- disassemble(s, *pc, 0, 1);
- }
-
+
+ printf("Step #%d\n", script_step_counter);
+ disassemble(s, scriptState.xs->addr.pc, 0, 1);
}
} // End of namespace Sci
diff --git a/engines/sci/engine/state.cpp b/engines/sci/engine/state.cpp
index e618077d54..c43fe9b6de 100644
--- a/engines/sci/engine/state.cpp
+++ b/engines/sci/engine/state.cpp
@@ -87,7 +87,7 @@ EngineState::EngineState(ResourceManager *res, sci_version_t version, uint32 fla
_executionStackPosChanged = false;
r_acc = NULL_REG;
- r_amp_rest = 0;
+ restAdjust = 0;
r_prev = NULL_REG;
stack_segment = 0;
diff --git a/engines/sci/engine/state.h b/engines/sci/engine/state.h
index ecfb9fe6f7..92a5b5e411 100644
--- a/engines/sci/engine/state.h
+++ b/engines/sci/engine/state.h
@@ -208,7 +208,7 @@ public:
bool _executionStackPosChanged; /**< Set to true if the execution stack position should be re-evaluated by the vm */
reg_t r_acc; /**< Accumulator */
- unsigned int r_amp_rest; /**< &rest register (only used for save games) */
+ uint16 restAdjust; /**< &rest register (only used for save games) */
reg_t r_prev; /**< previous comparison result */
SegmentId stack_segment; /**< Heap area for the stack to use */
diff --git a/engines/sci/engine/vm.cpp b/engines/sci/engine/vm.cpp
index c6643b8a90..9bbdb90e0c 100644
--- a/engines/sci/engine/vm.cpp
+++ b/engines/sci/engine/vm.cpp
@@ -177,8 +177,8 @@ static void validate_write_var(reg_t *r, reg_t *stack_base, int type, int max, i
#endif
-#define READ_VAR(type, index, def) validate_read_var(variables[type], s->stack_base, type, variables_max[type], index, __LINE__, def)
-#define WRITE_VAR(type, index, value) validate_write_var(variables[type], s->stack_base, type, variables_max[type], index, __LINE__, value)
+#define READ_VAR(type, index, def) validate_read_var(scriptState.variables[type], s->stack_base, type, scriptState.variables_max[type], index, __LINE__, def)
+#define WRITE_VAR(type, index, value) validate_write_var(scriptState.variables[type], s->stack_base, type, scriptState.variables_max[type], index, __LINE__, value)
#define WRITE_VAR16(type, index, value) WRITE_VAR(type, index, make_reg(0, value));
#define ACC_ARITHMETIC_L(op) make_reg(0, (op validate_arithmetic(s->r_acc)))
@@ -220,15 +220,15 @@ reg_t get_class_address(EngineState *s, int classnr, SCRIPT_GET lock, reg_t call
#define PUSH(v) PUSH32(make_reg(0, v))
#define POP() (validate_arithmetic(POP32()))
// 32 bit:
-#define PUSH32(a) (*(validate_stack_addr(s, (xs->sp)++)) = (a))
-#define POP32() (*(validate_stack_addr(s, --(xs->sp))))
+#define PUSH32(a) (*(validate_stack_addr(s, (scriptState.xs->sp)++)) = (a))
+#define POP32() (*(validate_stack_addr(s, --(scriptState.xs->sp))))
// Getting instruction parameters
-#define GET_OP_BYTE() ((uint8)code_buf[(xs->addr.pc.offset)++])
-#define GET_OP_WORD() (READ_LE_UINT16(code_buf + ((xs->addr.pc.offset) += 2) - 2))
+#define GET_OP_BYTE() ((uint8)code_buf[(scriptState.xs->addr.pc.offset)++])
+#define GET_OP_WORD() (READ_LE_UINT16(code_buf + ((scriptState.xs->addr.pc.offset) += 2) - 2))
#define GET_OP_FLEX() ((opcode & 1)? GET_OP_BYTE() : GET_OP_WORD())
-#define GET_OP_SIGNED_BYTE() ((int8)(code_buf[(xs->addr.pc.offset)++]))
-#define GET_OP_SIGNED_WORD() (((int16)READ_LE_UINT16(code_buf + ((xs->addr.pc.offset) += 2) - 2)))
+#define GET_OP_SIGNED_BYTE() ((int8)(code_buf[(scriptState.xs->addr.pc.offset)++]))
+#define GET_OP_SIGNED_WORD() (((int16)READ_LE_UINT16(code_buf + ((scriptState.xs->addr.pc.offset) += 2) - 2)))
#define GET_OP_SIGNED_FLEX() ((opcode & 1)? GET_OP_SIGNED_BYTE() : GET_OP_SIGNED_WORD())
ExecStack *execute_method(EngineState *s, uint16 script, uint16 pubfunct, StackPtr sp, reg_t calling_obj, uint16 argc, StackPtr argp) {
@@ -388,7 +388,7 @@ ExecStack *send_selector(EngineState *s, reg_t send_obj, reg_t work_obj, StackPt
break;
#ifdef STRICT_SEND
default:
- debugState.seeking = debugState.runningStep = 0;
+ scriptState.seeking = scriptState.runningStep = 0;
error("Send error: Variable selector %04x in %04x:%04x called with %04x params", selector, PRINT_REG(send_obj), argc);
#endif
}
@@ -543,11 +543,7 @@ static const byte _fake_return_buffer[2] = {op_ret << 1, op_ret << 1};
void run_vm(EngineState *s, int restoring) {
assert(s);
- reg_t *variables[4]; // global, local, temp, param, as immediate pointers
- reg_t *variables_base[4]; // Used for referencing VM ops
- SegmentId variables_seg[4]; // Same as above, contains segment IDs
#ifndef DISABLE_VALIDATIONS
- int variables_max[4]; // Max. values for all variables
unsigned int code_buf_size = 0 ; // (Avoid spurious warning)
#endif
int temp;
@@ -556,13 +552,13 @@ void run_vm(EngineState *s, int restoring) {
StackPtr s_temp; // Temporary stack pointer
int16 opparams[4]; // opcode parameters
- int restadjust = s->r_amp_rest;
+ scriptState.restadjust = s->restAdjust;
// &rest adjusts the parameter count by this value
// Current execution data:
- ExecStack *xs = &(s->_executionStack.back());
+ scriptState.xs = &(s->_executionStack.back());
ExecStack *xs_new = NULL;
- Object *obj = obj_get(s, xs->objp);
- Script *local_script = script_locate_by_segment(s, xs->local_segment);
+ Object *obj = obj_get(s, scriptState.xs->objp);
+ Script *local_script = script_locate_by_segment(s, scriptState.xs->local_segment);
int old_execution_stack_base = s->execution_stack_base;
// Used to detect the stack bottom, for "physical" returns
const byte *code_buf = NULL; // (Avoid spurious warning)
@@ -577,22 +573,20 @@ void run_vm(EngineState *s, int restoring) {
#ifndef DISABLE_VALIDATIONS
// Initialize maximum variable count
if (s->script_000->locals_block)
- variables_max[VAR_GLOBAL] = s->script_000->locals_block->_locals.size();
+ scriptState.variables_max[VAR_GLOBAL] = s->script_000->locals_block->_locals.size();
else
- variables_max[VAR_GLOBAL] = 0;
+ scriptState.variables_max[VAR_GLOBAL] = 0;
#endif
- variables_seg[VAR_GLOBAL] = s->script_000->locals_segment;
- variables_seg[VAR_TEMP] = variables_seg[VAR_PARAM] = s->stack_segment;
- variables_base[VAR_TEMP] = variables_base[VAR_PARAM] = s->stack_base;
+ scriptState.variables_seg[VAR_GLOBAL] = s->script_000->locals_segment;
+ scriptState.variables_seg[VAR_TEMP] = scriptState.variables_seg[VAR_PARAM] = s->stack_segment;
+ scriptState.variables_base[VAR_TEMP] = scriptState.variables_base[VAR_PARAM] = s->stack_base;
// SCI code reads the zeroeth argument to determine argc
if (s->script_000->locals_block)
- variables_base[VAR_GLOBAL] = variables[VAR_GLOBAL] = s->script_000->locals_block->_locals.begin();
+ scriptState.variables_base[VAR_GLOBAL] = scriptState.variables[VAR_GLOBAL] = s->script_000->locals_block->_locals.begin();
else
- variables_base[VAR_GLOBAL] = variables[VAR_GLOBAL] = NULL;
-
-
+ scriptState.variables_base[VAR_GLOBAL] = scriptState.variables[VAR_GLOBAL] = NULL;
s->_executionStackPosChanged = true; // Force initialization
@@ -602,58 +596,58 @@ void run_vm(EngineState *s, int restoring) {
int var_type; // See description below
int var_number;
- debugState.old_pc_offset = xs->addr.pc.offset;
- debugState.old_sp = xs->sp;
+ scriptState.old_pc_offset = scriptState.xs->addr.pc.offset;
+ scriptState.old_sp = scriptState.xs->sp;
if (s->_executionStackPosChanged) {
Script *scr;
- xs = &(s->_executionStack.back());
+ scriptState.xs = &(s->_executionStack.back());
s->_executionStackPosChanged = false;
- scr = script_locate_by_segment(s, xs->addr.pc.segment);
+ scr = script_locate_by_segment(s, scriptState.xs->addr.pc.segment);
if (!scr) {
// No script? Implicit return via fake instruction buffer
- warning("Running on non-existant script in segment %x", xs->addr.pc.segment);
+ warning("Running on non-existant script in segment %x", scriptState.xs->addr.pc.segment);
code_buf = _fake_return_buffer;
#ifndef DISABLE_VALIDATIONS
code_buf_size = 2;
#endif
- xs->addr.pc.offset = 1;
+ scriptState.xs->addr.pc.offset = 1;
scr = NULL;
obj = NULL;
} else {
- obj = obj_get(s, xs->objp);
+ obj = obj_get(s, scriptState.xs->objp);
code_buf = scr->buf;
#ifndef DISABLE_VALIDATIONS
code_buf_size = scr->buf_size;
#endif
- local_script = script_locate_by_segment(s, xs->local_segment);
+ local_script = script_locate_by_segment(s, scriptState.xs->local_segment);
if (!local_script) {
- warning("Could not find local script from segment %x", xs->local_segment);
+ warning("Could not find local script from segment %x", scriptState.xs->local_segment);
local_script = NULL;
- variables_base[VAR_LOCAL] = variables[VAR_LOCAL] = NULL;
+ scriptState.variables_base[VAR_LOCAL] = scriptState.variables[VAR_LOCAL] = NULL;
#ifndef DISABLE_VALIDATIONS
- variables_max[VAR_LOCAL] = 0;
+ scriptState.variables_max[VAR_LOCAL] = 0;
#endif
} else {
- variables_seg[VAR_LOCAL] = local_script->locals_segment;
+ scriptState.variables_seg[VAR_LOCAL] = local_script->locals_segment;
if (local_script->locals_block)
- variables_base[VAR_LOCAL] = variables[VAR_LOCAL] = local_script->locals_block->_locals.begin();
+ scriptState.variables_base[VAR_LOCAL] = scriptState.variables[VAR_LOCAL] = local_script->locals_block->_locals.begin();
else
- variables_base[VAR_LOCAL] = variables[VAR_LOCAL] = NULL;
+ scriptState.variables_base[VAR_LOCAL] = scriptState.variables[VAR_LOCAL] = NULL;
#ifndef DISABLE_VALIDATIONS
if (local_script->locals_block)
- variables_max[VAR_LOCAL] = local_script->locals_block->_locals.size();
+ scriptState.variables_max[VAR_LOCAL] = local_script->locals_block->_locals.size();
else
- variables_max[VAR_LOCAL] = 0;
- variables_max[VAR_TEMP] = xs->sp - xs->fp;
- variables_max[VAR_PARAM] = xs->argc + 1;
+ scriptState.variables_max[VAR_LOCAL] = 0;
+ scriptState.variables_max[VAR_TEMP] = scriptState.xs->sp - scriptState.xs->fp;
+ scriptState.variables_max[VAR_PARAM] = scriptState.xs->argc + 1;
#endif
}
- variables[VAR_TEMP] = xs->fp;
- variables[VAR_PARAM] = xs->variables_argp;
+ scriptState.variables[VAR_TEMP] = scriptState.xs->fp;
+ scriptState.variables[VAR_PARAM] = scriptState.xs->variables_argp;
}
}
@@ -665,24 +659,18 @@ void run_vm(EngineState *s, int restoring) {
#if 0
// Debug if this has been requested:
if (script_debug_flag || sci_debug_flags) {
- script_debug(s, &(xs->addr.pc), &(xs->sp), &(xs->fp), &(xs->objp), &restadjust, variables_seg, variables, variables_base,
-#ifdef DISABLE_VALIDATIONS
- NULL,
-#else
- variables_max,
-#endif
- breakpointFlag);
+ script_debug(s, breakpointFlag);
breakpointFlag = false;
}
#endif
#ifndef DISABLE_VALIDATIONS
- if (xs->sp < xs->fp)
+ if (scriptState.xs->sp < scriptState.xs->fp)
error("run_vm(): stack underflow");
- variables_max[VAR_TEMP] = xs->sp - xs->fp;
+ scriptState.variables_max[VAR_TEMP] = scriptState.xs->sp - scriptState.xs->fp;
- if (xs->addr.pc.offset >= code_buf_size)
+ if (scriptState.xs->addr.pc.offset >= code_buf_size)
error("run_vm(): program counter gone astray");
#endif
@@ -900,16 +888,16 @@ void run_vm(EngineState *s, int restoring) {
case 0x17: // bt
if (s->r_acc.offset || s->r_acc.segment)
- xs->addr.pc.offset += opparams[0];
+ scriptState.xs->addr.pc.offset += opparams[0];
break;
case 0x18: // bnt
if (!(s->r_acc.offset || s->r_acc.segment))
- xs->addr.pc.offset += opparams[0];
+ scriptState.xs->addr.pc.offset += opparams[0];
break;
case 0x19: // jmp
- xs->addr.pc.offset += opparams[0];
+ scriptState.xs->addr.pc.offset += opparams[0];
break;
case 0x1a: // ldi
@@ -925,33 +913,36 @@ void run_vm(EngineState *s, int restoring) {
break;
case 0x1d: // toss
- xs->sp--;
+ scriptState.xs->sp--;
break;
case 0x1e: // dup
- r_temp = xs->sp[-1];
+ r_temp = scriptState.xs->sp[-1];
PUSH32(r_temp);
break;
case 0x1f: { // link
int i;
for (i = 0; i < opparams[0]; i++)
- xs->sp[i] = NULL_REG;
- xs->sp += opparams[0];
+ scriptState.xs->sp[i] = NULL_REG;
+ scriptState.xs->sp += opparams[0];
break;
}
case 0x20: { // call
int argc = (opparams[1] >> 1) // Given as offset, but we need count
- + 1 + restadjust;
- StackPtr call_base = xs->sp - argc;
- xs->sp[1].offset += restadjust;
-
- xs_new = add_exec_stack_entry(s, make_reg(xs->addr.pc.segment, xs->addr.pc.offset + opparams[0]),
- xs->sp, xs->objp, (validate_arithmetic(*call_base)) + restadjust,
- call_base, NULL_SELECTOR, xs->objp, s->_executionStack.size()-1, xs->local_segment);
- restadjust = 0; // Used up the &rest adjustment
- xs->sp = call_base;
+ + 1 + scriptState.restadjust;
+ StackPtr call_base = scriptState.xs->sp - argc;
+ scriptState.xs->sp[1].offset += scriptState.restadjust;
+
+ xs_new = add_exec_stack_entry(s, make_reg(scriptState.xs->addr.pc.segment,
+ scriptState.xs->addr.pc.offset + opparams[0]),
+ scriptState.xs->sp, scriptState.xs->objp,
+ (validate_arithmetic(*call_base)) + scriptState.restadjust,
+ call_base, NULL_SELECTOR, scriptState.xs->objp,
+ s->_executionStack.size()-1, scriptState.xs->local_segment);
+ scriptState.restadjust = 0; // Used up the &rest adjustment
+ scriptState.xs->sp = call_base;
s->_executionStackPosChanged = true;
break;
@@ -960,25 +951,28 @@ void run_vm(EngineState *s, int restoring) {
case 0x21: // callk
gc_countdown(s);
- xs->sp -= (opparams[1] >> 1) + 1;
+ scriptState.xs->sp -= (opparams[1] >> 1) + 1;
if (!s->_kernel->hasOldScriptHeader()) {
- xs->sp -= restadjust;
- s->r_amp_rest = 0; // We just used up the restadjust, remember?
+ scriptState.xs->sp -= scriptState.restadjust;
+ s->restAdjust = 0; // We just used up the restadjust, remember?
}
if (opparams[0] >= (int)s->_kernel->_kernelFuncs.size()) {
error("Invalid kernel function 0x%x requested\n", opparams[0]);
} else {
- int argc = ASSERT_ARITHMETIC(xs->sp[0]);
+ int argc = ASSERT_ARITHMETIC(scriptState.xs->sp[0]);
if (!s->_kernel->hasOldScriptHeader())
- argc += restadjust;
+ argc += scriptState.restadjust;
if (s->_kernel->_kernelFuncs[opparams[0]].signature
- && !kernel_matches_signature(s, s->_kernel->_kernelFuncs[opparams[0]].signature, argc, xs->sp + 1)) {
+ && !kernel_matches_signature(s,
+ s->_kernel->_kernelFuncs[opparams[0]].signature, argc,
+ scriptState.xs->sp + 1)) {
error("[VM] Invalid arguments to kernel call %x\n", opparams[0]);
} else {
- s->r_acc = s->_kernel->_kernelFuncs[opparams[0]].fun(s, opparams[0], argc, xs->sp + 1);
+ s->r_acc = s->_kernel->_kernelFuncs[opparams[0]].fun(s, opparams[0],
+ argc, scriptState.xs->sp + 1);
}
// Call kernel function
@@ -989,31 +983,33 @@ void run_vm(EngineState *s, int restoring) {
s->_executionStackPosChanged = true;
if (!s->_kernel->hasOldScriptHeader())
- restadjust = s->r_amp_rest;
+ scriptState.restadjust = s->restAdjust;
}
break;
case 0x22: // callb
- temp = ((opparams[1] >> 1) + restadjust + 1);
- s_temp = xs->sp;
- xs->sp -= temp;
-
- xs->sp[0].offset += restadjust;
- xs_new = execute_method(s, 0, opparams[0], s_temp, xs->objp, xs->sp[0].offset, xs->sp);
- restadjust = 0; // Used up the &rest adjustment
+ temp = ((opparams[1] >> 1) + scriptState.restadjust + 1);
+ s_temp = scriptState.xs->sp;
+ scriptState.xs->sp -= temp;
+
+ scriptState.xs->sp[0].offset += scriptState.restadjust;
+ xs_new = execute_method(s, 0, opparams[0], s_temp, scriptState.xs->objp,
+ scriptState.xs->sp[0].offset, scriptState.xs->sp);
+ scriptState.restadjust = 0; // Used up the &rest adjustment
if (xs_new) // in case of error, keep old stack
s->_executionStackPosChanged = true;
break;
case 0x23: // calle
- temp = ((opparams[2] >> 1) + restadjust + 1);
- s_temp = xs->sp;
- xs->sp -= temp;
+ temp = ((opparams[2] >> 1) + scriptState.restadjust + 1);
+ s_temp = scriptState.xs->sp;
+ scriptState.xs->sp -= temp;
- xs->sp[0].offset += restadjust;
- xs_new = execute_method(s, opparams[0], opparams[1], s_temp, xs->objp, xs->sp[0].offset, xs->sp);
- restadjust = 0; // Used up the &rest adjustment
+ scriptState.xs->sp[0].offset += scriptState.restadjust;
+ xs_new = execute_method(s, opparams[0], opparams[1], s_temp, scriptState.xs->objp,
+ scriptState.xs->sp[0].offset, scriptState.xs->sp);
+ scriptState.restadjust = 0; // Used up the &rest adjustment
if (xs_new) // in case of error, keep old stack
s->_executionStackPosChanged = true;
@@ -1021,8 +1017,8 @@ void run_vm(EngineState *s, int restoring) {
case 0x24: // ret
do {
- StackPtr old_sp2 = xs->sp;
- StackPtr old_fp = xs->fp;
+ StackPtr old_sp2 = scriptState.xs->sp;
+ StackPtr old_fp = scriptState.xs->fp;
ExecStack *old_xs = &(s->_executionStack.back());
if ((int)s->_executionStack.size()-1 == s->execution_stack_base) { // Have we reached the base?
@@ -1031,7 +1027,7 @@ void run_vm(EngineState *s, int restoring) {
s->_executionStack.pop_back();
s->_executionStackPosChanged = true;
- s->r_amp_rest = restadjust; // Update &rest
+ s->restAdjust = scriptState.restadjust; // Update &rest
return; // "Hard" return
}
@@ -1046,80 +1042,84 @@ void run_vm(EngineState *s, int restoring) {
// Not reached the base, so let's do a soft return
s->_executionStack.pop_back();
s->_executionStackPosChanged = true;
- xs = &(s->_executionStack.back());
+ scriptState.xs = &(s->_executionStack.back());
- if (xs->sp == CALL_SP_CARRY // Used in sends to 'carry' the stack pointer
- || xs->type != EXEC_STACK_TYPE_CALL) {
- xs->sp = old_sp2;
- xs->fp = old_fp;
+ if (scriptState.xs->sp == CALL_SP_CARRY // Used in sends to 'carry' the stack pointer
+ || scriptState.xs->type != EXEC_STACK_TYPE_CALL) {
+ scriptState.xs->sp = old_sp2;
+ scriptState.xs->fp = old_fp;
}
- } while (xs->type == EXEC_STACK_TYPE_VARSELECTOR);
+ } while (scriptState.xs->type == EXEC_STACK_TYPE_VARSELECTOR);
// Iterate over all varselector accesses
s->_executionStackPosChanged = true;
- xs_new = xs;
+ xs_new = scriptState.xs;
break;
case 0x25: // send
- s_temp = xs->sp;
- xs->sp -= ((opparams[0] >> 1) + restadjust); // Adjust stack
+ s_temp = scriptState.xs->sp;
+ scriptState.xs->sp -= ((opparams[0] >> 1) + scriptState.restadjust); // Adjust stack
- xs->sp[1].offset += restadjust;
- xs_new = send_selector(s, s->r_acc, s->r_acc, s_temp, (int)(opparams[0] >> 1) + (uint16)restadjust, xs->sp);
+ scriptState.xs->sp[1].offset += scriptState.restadjust;
+ xs_new = send_selector(s, s->r_acc, s->r_acc, s_temp,
+ (int)(opparams[0] >> 1) + scriptState.restadjust, scriptState.xs->sp);
- if (xs_new && xs_new != xs)
+ if (xs_new && xs_new != scriptState.xs)
s->_executionStackPosChanged = true;
- restadjust = 0;
+ scriptState.restadjust = 0;
break;
case 0x28: // class
- s->r_acc = get_class_address(s, (unsigned)opparams[0], SCRIPT_GET_LOCK, xs->addr.pc);
+ s->r_acc = get_class_address(s, (unsigned)opparams[0], SCRIPT_GET_LOCK,
+ scriptState.xs->addr.pc);
break;
case 0x2a: // self
- s_temp = xs->sp;
- xs->sp -= ((opparams[0] >> 1) + restadjust); // Adjust stack
+ s_temp = scriptState.xs->sp;
+ scriptState.xs->sp -= ((opparams[0] >> 1) + scriptState.restadjust); // Adjust stack
- xs->sp[1].offset += restadjust;
- xs_new = send_selector(s, xs->objp, xs->objp, s_temp, (int)(opparams[0] >> 1) + (uint16)restadjust, xs->sp);
+ scriptState.xs->sp[1].offset += scriptState.restadjust;
+ xs_new = send_selector(s, scriptState.xs->objp, scriptState.xs->objp,
+ s_temp, (int)(opparams[0] >> 1) + scriptState.restadjust,
+ scriptState.xs->sp);
- if (xs_new && xs_new != xs)
+ if (xs_new && xs_new != scriptState.xs)
s->_executionStackPosChanged = true;
- restadjust = 0;
+ scriptState.restadjust = 0;
break;
case 0x2b: // super
- r_temp = get_class_address(s, opparams[0], SCRIPT_GET_LOAD, xs->addr.pc);
+ r_temp = get_class_address(s, opparams[0], SCRIPT_GET_LOAD, scriptState.xs->addr.pc);
if (!r_temp.segment)
error("[VM]: Invalid superclass in object");
else {
- s_temp = xs->sp;
- xs->sp -= ((opparams[1] >> 1) + restadjust); // Adjust stack
+ s_temp = scriptState.xs->sp;
+ scriptState.xs->sp -= ((opparams[1] >> 1) + scriptState.restadjust); // Adjust stack
- xs->sp[1].offset += restadjust;
- xs_new = send_selector(s, r_temp, xs->objp, s_temp, (int)(opparams[1] >> 1) + (uint16)restadjust, xs->sp);
+ scriptState.xs->sp[1].offset += scriptState.restadjust;
+ xs_new = send_selector(s, r_temp, scriptState.xs->objp, s_temp,
+ (int)(opparams[1] >> 1) + scriptState.restadjust,
+ scriptState.xs->sp);
- if (xs_new && xs_new != xs)
+ if (xs_new && xs_new != scriptState.xs)
s->_executionStackPosChanged = true;
- restadjust = 0;
+ scriptState.restadjust = 0;
}
break;
case 0x2c: // &rest
temp = (uint16) opparams[0]; // First argument
- restadjust = xs->argc - temp + 1; // +1 because temp counts the paramcount while argc doesn't
- if (restadjust < 0)
- restadjust = 0;
+ scriptState.restadjust = MAX<uint16>(scriptState.xs->argc - temp + 1, 0); // +1 because temp counts the paramcount while argc doesn't
- for (; temp <= xs->argc; temp++)
- PUSH32(xs->variables_argp[temp]);
+ for (; temp <= scriptState.xs->argc; temp++)
+ PUSH32(scriptState.xs->variables_argp[temp]);
break;
@@ -1128,8 +1128,8 @@ void run_vm(EngineState *s, int restoring) {
var_number = temp & 0x03; // Get variable type
// Get variable block offset
- r_temp.segment = variables_seg[var_number];
- r_temp.offset = variables[var_number] - variables_base[var_number];
+ r_temp.segment = scriptState.variables_seg[var_number];
+ r_temp.offset = scriptState.variables[var_number] - scriptState.variables_base[var_number];
if (temp & 0x08) // Add accumulator offset if requested
r_temp.offset += signed_validate_arithmetic(s->r_acc);
@@ -1142,7 +1142,7 @@ void run_vm(EngineState *s, int restoring) {
case 0x2e: // selfID
- s->r_acc = xs->objp;
+ s->r_acc = scriptState.xs->objp;
break;
case 0x30: // pprev
@@ -1189,7 +1189,7 @@ void run_vm(EngineState *s, int restoring) {
case 0x39: // lofsa
- s->r_acc.segment = xs->addr.pc.segment;
+ s->r_acc.segment = scriptState.xs->addr.pc.segment;
if (s->_version >= SCI_VERSION_1_1) {
s->r_acc.offset = opparams[0] + local_script->script_size;
@@ -1197,7 +1197,7 @@ void run_vm(EngineState *s, int restoring) {
if (s->_kernel->hasLofsAbsolute())
s->r_acc.offset = opparams[0];
else
- s->r_acc.offset = xs->addr.pc.offset + opparams[0];
+ s->r_acc.offset = scriptState.xs->addr.pc.offset + opparams[0];
}
#ifndef DISABLE_VALIDATIONS
@@ -1209,7 +1209,7 @@ void run_vm(EngineState *s, int restoring) {
break;
case 0x3a: // lofss
- r_temp.segment = xs->addr.pc.segment;
+ r_temp.segment = scriptState.xs->addr.pc.segment;
if (s->_version >= SCI_VERSION_1_1) {
r_temp.offset = opparams[0] + local_script->script_size;
@@ -1217,7 +1217,7 @@ void run_vm(EngineState *s, int restoring) {
if (s->_kernel->hasLofsAbsolute())
r_temp.offset = opparams[0];
else
- r_temp.offset = xs->addr.pc.offset + opparams[0];
+ r_temp.offset = scriptState.xs->addr.pc.offset + opparams[0];
}
#ifndef DISABLE_VALIDATIONS
@@ -1242,7 +1242,7 @@ void run_vm(EngineState *s, int restoring) {
break;
case 0x3e: // pushSelf
- PUSH32(xs->objp);
+ PUSH32(scriptState.xs->objp);
break;
case 0x40: // lag
@@ -1410,12 +1410,12 @@ void run_vm(EngineState *s, int restoring) {
} // switch(opcode >> 1)
if (s->_executionStackPosChanged) // Force initialization
- xs = xs_new;
+ scriptState.xs = xs_new;
//#ifndef DISABLE_VALIDATIONS
- if (xs != &(s->_executionStack.back())) {
+ if (scriptState.xs != &(s->_executionStack.back())) {
warning("xs is stale (%p vs %p); last command was %02x",
- (void *)xs, (void *)&(s->_executionStack.back()),
+ (void *)scriptState.xs, (void *)&(s->_executionStack.back()),
opnumber);
}
//#endif
@@ -2037,9 +2037,8 @@ const char *obj_get_name(EngineState *s, reg_t pos) {
void quit_vm() {
script_abort_flag = 1; // Terminate VM
- debugState.isValid = false;
- debugState.seeking = kDebugSeekNothing;
- debugState.runningStep = 0;
+ scriptState.seeking = kDebugSeekNothing;
+ scriptState.runningStep = 0;
}
void shrink_execution_stack(EngineState *s, uint size) {
diff --git a/engines/sci/engine/vm.h b/engines/sci/engine/vm.h
index a3fabbe44b..1472fae97c 100644
--- a/engines/sci/engine/vm.h
+++ b/engines/sci/engine/vm.h
@@ -243,24 +243,23 @@ enum ExecStackType {
};
struct ExecStack {
- reg_t objp;
- reg_t sendp; /**< Pointer to the object containing the invoked method */
+ reg_t objp; // Pointer to the beginning of the current object
+ reg_t sendp; // Pointer to the object containing the invoked method
union {
- ObjVarRef varp; /**< Variable pointer for r/w access */
- reg_t pc; /**< Not accurate for the TOS element */
+ ObjVarRef varp; // Variable pointer for r/w access
+ reg_t pc; // Pointer to the initial program counter. Not accurate for the TOS element
} addr;
- StackPtr fp; /**< Frame pointer */
- StackPtr sp; /**< Stack pointer */
+ StackPtr fp; // Frame pointer
+ StackPtr sp; // Stack pointer
int argc;
- /* former variables[4]: [all other values are derived] */
- StackPtr variables_argp; /**< Argument pointer */
- SegmentId local_segment; /**< local variables etc. */
+ StackPtr variables_argp; // Argument pointer
+ SegmentId local_segment; // local variables etc
- Selector selector; /**< The selector which was used to call or -1 if not applicable */
- int origin; /**< The stack frame position the call was made from, or -1 if it was the initial call. */
+ Selector selector; // The selector which was used to call or -1 if not applicable
+ int origin; // The stack frame position the call was made from, or -1 if it was the initial call
ExecStackType type;
reg_t* getVarPointer(EngineState *s) const;
@@ -409,27 +408,10 @@ void vm_handle_fatal_error(EngineState *s, int line, const char *file);
/**
* Debugger functionality
- * @param[in] s The state at which debugging should take
- * place
- * @param[in] pc Pointer to the program counter
- * @param[in] sp Pointer to the stack pointer
- * @param[in] pp Pointer to the frame pointer
- * @param[in] objp Pointer to the object base pointer
- * @param[in] restadjust Pointer to the &rest adjustment value
- * @param[in] segids four-element array containing segment IDs
- * for locals etc.
- * @param[in] variables four-element array referencing registers
- * for globals etc.
- * @param[in] variables_base four-element array referencing register
- * bases for temps etc.
- * @param[in] variables_nr four-element array giving sizes for params
- * etc. (may be NULL)
- * @param[in] bp Flag, set to 1 when a breakpoint is
- * triggered
- */
-void script_debug(EngineState *s, reg_t *pc, StackPtr *sp, StackPtr *pp,
- reg_t *objp, int *restadjust, SegmentId *segids, reg_t **variables,
- reg_t **variables_base, int *variables_nr, int bp);
+ * @param[in] s The state at which debugging should take place
+ * @param[in] bp Flag, set to true when a breakpoint is triggered
+ */
+void script_debug(EngineState *s, bool bp);
/**
* Initializes a EngineState block
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 23:12:50 +0000