eden-emu
/
eden
mirror of https://git.eden-emu.dev/eden-emu/eden.git
1
0
Fork 0
Code Releases Wiki Activity
Browse Source

Merge branch 'variable-page-size' of http://git.exverge.xyz:3000/Exverge/eden into variable-page-size

remotes/1785372757367212240/tmp_refs/heads/variable-page-size
Exverge 1 month ago
parent
b13653d698 641209adb8
commit
871b6320ae
No known key found for this signature in database GPG Key ID: DAD399BCC5FB77E4
1 changed files with 21 additions and 31 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 52
      src/core/arm/nce/arm_nce.cpp

52
src/core/arm/nce/arm_nce.cpp
View File

@ -97,21 +97,20 @@ void ArmNce::UnlockThreadParameters(void* tpidr) {
static_cast<NativeExecutionParameters*>(tpidr)->lock.store(SpinLockUnlocked, std::memory_order_release);
}
YUZU_NO_INLINE
YUZU_NAKED
YUZU_NO_INLINE
HaltReason ArmNce::ReturnToRunCodeByExceptionLevelChange(int tid, void *tpidr) {
// x0 - tid
// x1 - tpidr
// x19 - callee-saved register and our tpidr storage
// x9 - NativeExecutionParameters*
//
// uses tkill on linux and pthread_kill on macOS, both have the same signature:
/* syscall (u32 tid, u64 signal) */
// tid is already in x0 so we don't have to explicitly pass it
asm volatile(
"str x19, [SP, #-0x10]!\n"
"mov x19, x1\n" // move tpidr to x19 so it doesn't get clobbered
"mov x9, x1\n" // move tpidr to x9 so it doesn't get clobbered
"mov x1, #%[sig]\n" // set x1 to SIGUSR2
#if defined(__linux__)
@ -141,8 +140,8 @@ void ArmNce::ReturnToRunCodeByExceptionLevelChangeSignalHandler(int sig, void *i
#ifndef __APPLE__
// Save old value of TPIDR_EL0, load guest one
u64 tpidr_el0;
asm volatile("mrs %0, TPIDR_EL0"
"msr TPIDR_EL0, %1"
asm volatile("mrs %0, TPIDR_EL0\n"
"msr TPIDR_EL0, %1\n"
: "=r"(tpidr_el0)
: "r"(tpidr));
tpidr->tpidr_el0 = tpidr_el0;
@ -154,8 +153,8 @@ void ArmNce::ReturnToRunCodeByExceptionLevelChangeSignalHandler(int sig, void *i
// sigaction restores context and returns to guest
}
YUZU_NO_INLINE
YUZU_NAKED
YUZU_NO_INLINE
HaltReason ArmNce::ReturnToRunCodeByTrampoline(void *tpidr, u64 trampoline_addr) {
// x0 - NativeExecutionParameters*
// x1 - addr
@ -168,22 +167,22 @@ HaltReason ArmNce::ReturnToRunCodeByTrampoline(void *tpidr, u64 trampoline_addr)
asm volatile(
"mov x3, SP\n"
"ldr x2, [ x0, #%[ctx_off] ]\n"
"add x5, x2, #%[host_ctx] \n"
#ifndef __APPLE__
// Load guest tpidr_el0
"mrs x4, TPIDR_EL0\n"
"msr TPIDR_EL0, x0\n"
// Store host sp and tpidr_el0
"stp x3, x4, [ x2, #%[host_sp] ]\n"
"stp x3, x4, [x2, #0xE0]\n"
#else
// is_actually_running = true
"mov w4, #1\n"
"strb w0, [ x0, #%[is_running_off] ]\n"
// Store host sp
"str x3, [ x2, #(%[host_ctx] + 0xE0) ]\n"
"str x3, [x5, #0xE0]\n"
#endif
"add x5, x2, #%[host_ctx]\n"
// Save callee-saved host GPR registers
"stp x19, x20, [x5, #0x0]\n"
"stp x21, x22, [x5, #0x10]\n"
@ -214,7 +213,7 @@ HaltReason ArmNce::ReturnToRunCodeByTrampoline(void *tpidr, u64 trampoline_addr)
}
YUZU_NAKED_END
static_assert(offsetof(HostContext, host_sp) == 0xE0);
static_assert(offsetof(HostContext, host_sp) == 0xE0); // TODO: don't use magic number
void ArmNce::BreakFromRunCodeSignalHandler(int sig, void *info, void *raw_context) {
NativeExecutionParameters* tpidr = reinterpret_cast<NativeExecutionParameters *>(GetGuestParameters());
@ -224,17 +223,13 @@ void ArmNce::BreakFromRunCodeSignalHandler(int sig, void *info, void *raw_contex
#else
if (tpidr->magic == Common::MakeMagic('Y', 'U', 'Z', 'U')) {
// Load the host's TPIDR_EL0 value
u64 scratch;
void* host_tpidr = reinterpret_cast<GuestContext*>(&tpidr->native_context)->host_ctx.host_tpidr_el0;
asm volatile(
"ldr %[scratch], [ %[tpidr], #[off] ]\n"
"msr TPIDR_EL0, %[scratch]\n"
: [scratch] "=&r"(scratch)
: [tpidr] "r"(nep)
: "memory"
);
"msr TPIDR_EL0, %[host_tpidr]\n"
:: [host_tpidr] "r"(host_tpidr));
#endif
SaveGuestContext(static_cast<GuestContext *>(tpidr->native_context), raw_context);
// Returning from here will enter host code.
// SaveGuestContext loads host context, returning from here will enter host code.
}
}
@ -249,14 +244,10 @@ void ArmNce::GuestMemoryFaultSignalHandler(int sig, void* raw_info, void* raw_co
#else
if (nep->magic == Common::MakeMagic('Y', 'U', 'Z', 'U')) {
// Load the host's TPIDR_EL0 value
u64 scratch;
void* host_tpidr = reinterpret_cast<GuestContext*>(&nep->native_context)->host_ctx.host_tpidr_el0;
asm volatile(
"ldr %[scratch], [ %[tpidr], #[off] ]\n"
"msr TPIDR_EL0, %[scratch]\n"
: [scratch] "=&r"(scratch)
: [tpidr] "r"(nep)
: "memory"
);
"msr TPIDR_EL0, %[host_tpidr]\n"
:: [host_tpidr] "r"(host_tpidr));
#endif
auto* info = static_cast<siginfo_t*>(raw_info);
@ -317,19 +308,18 @@ void* ArmNce::RestoreGuestContext(void* raw_context) {
// Retrieve the host context.
auto host_ctx = KernelContext(&static_cast<ucontext_t*>(raw_context)->uc_mcontext);
// Thread-local parameters will be located in x19.
auto* tpidr = reinterpret_cast<NativeExecutionParameters*>(host_ctx.regs()[19]);
// Thread-local parameters will be located in x9.
auto* tpidr = reinterpret_cast<NativeExecutionParameters*>(host_ctx.regs()[9]);
auto* guest_ctx = static_cast<GuestContext*>(tpidr->native_context);
// Save host callee-saved registers.
host_ctx.regs()[19] = *reinterpret_cast<u64*>(*host_ctx.sp()); // load x19 original value from the stack
std::memcpy(guest_ctx->host_ctx.host_saved_vregs.data(), &host_ctx.vregs()[8],
sizeof(guest_ctx->host_ctx.host_saved_vregs));
std::memcpy(guest_ctx->host_ctx.host_saved_regs.data(), &host_ctx.regs()[19],
sizeof(guest_ctx->host_ctx.host_saved_regs));
// Save stack pointer.
guest_ctx->host_ctx.host_sp = *host_ctx.sp() + 16; // +16 for the space we reserve for x19
guest_ctx->host_ctx.host_sp = *host_ctx.sp();
// Restore all guest state except tpidr_el0.
*host_ctx.sp() = guest_ctx->sp;
@ -649,4 +639,4 @@ void ArmNce::InvalidateCacheRange(u64 addr, std::size_t size) {
} // namespace Core
#endif // #ifdef __aarch64__
#endif // #ifdef __aarch64__
Write Preview
Loading…
Cancel
Save