6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-06-01 22:41:32 +00:00
Code Issues Projects Releases Wiki Activity

Start adding SWI detail.

Browse Source
This commit is contained in:
Thomas Harte 2024-03-30 15:16:48 -04:00
parent 722743659b
commit 4882d6d0f2
1 changed files with 74 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

83
Machines/Acorn/Archimedes/Archimedes.cpp
View File

@ -177,6 +177,8 @@ class ConcreteMachine:
uint32_t address;
uint32_t regs[10];
uint32_t return_address;
std::string value_name;
std::string swi_name;
};
static std::vector<SWICall> swis;
static uint32_t last_pc = 0;
@ -221,11 +223,67 @@ class ConcreteMachine:
(instruction & 0x0f00'0000) == 0x0f00'0000 &&
executor_.registers().test(InstructionSet::ARM::Condition(instruction >> 28))
) {
swis.emplace_back();
swis.back().opcode = instruction;
swis.back().address = executor_.pc();
swis.back().return_address = executor_.registers().pc(4);
for(int c = 0; c < 10; c++) swis.back().regs[c] = executor_.registers()[uint32_t(c)];
if(instruction & 0x2'0000) {
swis.emplace_back();
swis.back().opcode = instruction;
swis.back().address = executor_.pc();
swis.back().return_address = executor_.registers().pc(4);
for(int c = 0; c < 10; c++) swis.back().regs[c] = executor_.registers()[uint32_t(c)];
// Possibly capture more detail.
uint32_t pointer = 0;
switch(instruction & 0xfd'ffff) {
case 0x41501:
swis.back().swi_name = "MessageTrans_OpenFile";
// R0: pointer to file descriptor; R1: pointer to filename; R2: pointer to hold file data.
// (R0 and R1 are in the RMA if R2 = 0)
pointer = executor_.registers()[1];
break;
case 0x4028a:
swis.back().swi_name = "Podule_EnumerateChunksWithInfo";
break;
case 0x0d:
swis.back().swi_name = "OS_Find";
break;
case 0x23:
swis.back().swi_name = "OS_ReadVarVal";
// R0: pointer to variable name.
pointer = executor_.registers()[0];
break;
case 0x43057:
swis.back().swi_name = "Territory_LowerCaseTable";
break;
case 0x43058:
swis.back().swi_name = "Territory_UpperCaseTable";
break;
case 0x42fc1:
swis.back().swi_name = "Portable_Control";
break;
}
if(pointer) {
while(true) {
uint8_t next;
executor_.bus.template read<uint8_t>(pointer, next, InstructionSet::ARM::Mode::Supervisor, false);
++pointer;
if(next == '\0') break;
swis.back().value_name.push_back(static_cast<char>(next));
}
}
}
if(executor_.registers().pc_status(0) & InstructionSet::ARM::ConditionCode::Overflow) {
logger.error().append("SWI called with V set");
}
}
if(!swis.empty() && executor_.pc() == swis.back().return_address) {
// Overflow set => SWI failure.
@ -233,13 +291,20 @@ class ConcreteMachine:
if(executor_.registers().pc_status(0) & InstructionSet::ARM::ConditionCode::Overflow) {
auto info = logger.info();
info.append("failed swi %x @ %08x ",
back.opcode & 0xfd'ffff,
back.address
);
info.append("failed swi ");
if(back.swi_name.empty()) {
info.append("&%x", back.opcode & 0xfd'ffff);
} else {
info.append("%s", back.swi_name.c_str());
}
info.append(" @ %08x ", back.address);
for(uint32_t c = 0; c < 10; c++) {
info.append("r%d:%08x ", c, back.regs[c]);
}
if(!back.value_name.empty()) {
info.append("for %s", back.value_name.c_str());
}
}
swis.pop_back();