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[nce, fs] tico support, fix FS bug that would nuke entire 'switch' folder (#4086)

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Contains the minimal set of functionalities to allow tico installer succeed, and tico work normally EXCEPT for game launching (which me or someone else will investigate later)

First three commits are from PR 4012.

The other six, kinda dizzy to explain each one. All were implemented based on tico source, switchbrew and libnx.
Hopefully the commit messages will do.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4086
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: Maufeat <sahyno1996@gmail.com>
This commit is contained in:
xbzk
2026-07-23 21:59:55 +02:00
committed by crueter
parent 89004124a5
commit b85f289048
14 changed files with 502 additions and 22 deletions
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src/core/arm/nce/patcher.cpp
+18 -1
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@@ -145,7 +145,14 @@ bool Patcher::PatchText(std::span<const u8> program_image, const Kernel::CodeSet
// MRS Xn, CNTFRQ_EL0
if (auto mrs = MRS{inst}; mrs.Verify() && mrs.GetSystemReg() == CntfrqEl0) {
UNREACHABLE();
bool pre_buffer = false;
auto ret = AddRelocations(pre_buffer);
if (pre_buffer) {
WriteCntfrqHandler(ret, oaknut::XReg{static_cast<int>(mrs.GetRt())}, c_pre);
} else {
WriteCntfrqHandler(ret, oaknut::XReg{static_cast<int>(mrs.GetRt())}, c);
}
continue;
}
// MSR TPIDR_EL0, Xn
@@ -577,6 +584,16 @@ void Patcher::WriteMsrHandler(ModuleDestLabel module_dest, oaknut::XReg src_reg,
this->BranchToModule(module_dest);
}
void Patcher::WriteCntfrqHandler(ModuleDestLabel module_dest, oaknut::XReg dest_reg, oaknut::VectorCodeGenerator& cg) {
cg.MOV(dest_reg, Common::WallClock::CNTFRQ);
// Jump back to the instruction after the emulated MRS.
if (&cg == &c_pre)
this->BranchToModulePre(module_dest);
else
this->BranchToModule(module_dest);
}
void Patcher::WriteCntpctHandler(ModuleDestLabel module_dest, oaknut::XReg dest_reg, oaknut::VectorCodeGenerator& cg) {
#if defined(HAS_NCE)
static Common::WallClock clock(false, 1);