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Sort of working OS allocator, except freeing is impossible

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wheremyfoodat 2022-09-16 23:36:55 +03:00
parent 2128d5060b
commit 93f5ec7bb4
8 changed files with 186 additions and 40 deletions
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12
src/core/kernel/memory_management.cpp
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@ -23,6 +23,7 @@ static constexpr bool isAligned(u32 value) {
// Result ControlMemory(u32* outaddr, u32 addr0, u32 addr1, u32 size,
// MemoryOperation operation, MemoryPermission permissions)
// This has a weird ABI documented here https://www.3dbrew.org/wiki/Kernel_ABI
// TODO: Does this need to write to outaddr?
void Kernel::controlMemory() {
u32 operation = regs[0]; // The base address is written here
u32 addr0 = regs[1];
@ -48,17 +49,22 @@ void Kernel::controlMemory() {
Helpers::panic("ControlMemory: Unaligned parameters\nAddr0: %08X\nAddr1: %08X\nSize: %08X", addr0, addr1, size);
}
printf("ControlMemory(addr0 = %08X, addr1 = %08X, size = %X, operation = %X (%c%c%c)%s\n",
printf("ControlMemory(addr0 = %08X, addr1 = %08X, size = %08X, operation = %X (%c%c%c)%s\n",
addr0, addr1, size, operation, r ? 'r' : '-', w ? 'w' : '-', x ? 'x' : '-', linear ? ", linear" : ""
);
switch (operation & 0xFF) {
case Operation::Commit:
case Operation::Commit: {
std::optional<u32> address = mem.allocateMemory(addr0, 0, size, linear);
if (!address.has_value())
Helpers::panic("ControlMemory: Failed to allocate memory");
regs[1] = address.value();
break;
}
default: Helpers::panic("ControlMemory: unknown operation %X\n", operation);
}
regs[0] = SVCResult::Success;
regs[1] = 0xF3180131;
}

2
src/core/kernel/resource_limits.cpp
View file

@ -83,7 +83,7 @@ void Kernel::getResourceLimitCurrentValues() {
s32 Kernel::getCurrentResourceValue(const KernelObject* limit, u32 resourceName) {
const auto data = static_cast<ResourceLimits*>(limit->data);
switch (resourceName) {
case ResourceType::Commit: return data->currentCommit;
case ResourceType::Commit: return mem.usedUserMemory;
default: Helpers::panic("Attempted to get current value of unknown kernel resource: %d\n", resourceName);
}
}