mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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96f95b9f95
* result: try out some experimental shenanigans * result: sketch out some more shenanigans * result: see what it looks like to convert kernel to use result conds instead of guards * make rest of kernel use experimental new macro-ing
933 lines
44 KiB
C++
933 lines
44 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern::arch::arm64 {
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namespace {
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constexpr inline u64 ForbiddenBreakPointFlagsMask = (((1ul << 40) - 1) << 24) | /* Reserved upper bits. */
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(((1ul << 1) - 1) << 23) | /* Match VMID BreakPoint Type. */
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(((1ul << 2) - 1) << 14) | /* Security State Control. */
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(((1ul << 1) - 1) << 13) | /* Hyp Mode Control. */
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(((1ul << 4) - 1) << 9) | /* Reserved middle bits. */
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(((1ul << 2) - 1) << 3) | /* Reserved lower bits. */
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(((1ul << 2) - 1) << 1); /* Privileged Mode Control. */
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static_assert(ForbiddenBreakPointFlagsMask == 0xFFFFFFFFFF80FE1Eul);
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constexpr inline u64 ForbiddenWatchPointFlagsMask = (((1ul << 32) - 1) << 32) | /* Reserved upper bits. */
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(((1ul << 4) - 1) << 20) | /* WatchPoint Type. */
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(((1ul << 2) - 1) << 14) | /* Security State Control. */
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(((1ul << 1) - 1) << 13) | /* Hyp Mode Control. */
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(((1ul << 2) - 1) << 1); /* Privileged Access Control. */
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static_assert(ForbiddenWatchPointFlagsMask == 0xFFFFFFFF00F0E006ul);
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constexpr inline u32 El0PsrMask = 0xFF0FFE20;
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}
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uintptr_t KDebug::GetProgramCounter(const KThread &thread) {
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return GetExceptionContext(std::addressof(thread))->pc;
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}
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void KDebug::SetPreviousProgramCounter() {
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/* Get the current thread. */
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KThread *thread = GetCurrentThreadPointer();
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MESOSPHERE_ASSERT(thread->IsCallingSvc());
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/* Get the exception context. */
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KExceptionContext *e_ctx = GetExceptionContext(thread);
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/* Set the previous pc. */
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if (e_ctx->write == 0) {
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/* Subtract from the program counter. */
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if (thread->GetOwnerProcess()->Is64Bit()) {
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e_ctx->pc -= sizeof(u32);
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} else {
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e_ctx->pc -= (e_ctx->psr & 0x20) ? sizeof(u16) : sizeof(u32);
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}
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/* Mark that we've set. */
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e_ctx->write = 1;
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}
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}
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Result KDebug::GetThreadContextImpl(ams::svc::ThreadContext *out, KThread *thread, u32 context_flags) {
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MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
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MESOSPHERE_ASSERT(thread != GetCurrentThreadPointer());
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/* Get the exception context. */
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const KExceptionContext *e_ctx = GetExceptionContext(thread);
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/* Get whether we're 64-bit. */
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const bool is_64_bit = this->Is64Bit();
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/* If general registers are requested, get them. */
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if ((context_flags & ams::svc::ThreadContextFlag_General) != 0) {
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/* We can always get X0-X7/R0-R7. */
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auto register_count = 8;
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if (!thread->IsCallingSvc() || thread->GetSvcId() == svc::SvcId_ReturnFromException) {
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if (is_64_bit) {
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/* We're not in an SVC, so we can get X0-X29. */
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register_count = 29;
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} else {
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/* We're 32-bit, so we should get R0-R12. */
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register_count = 13;
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}
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}
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/* Get the registers. */
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for (auto i = 0; i < register_count; ++i) {
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out->r[i] = is_64_bit ? e_ctx->x[i] : static_cast<u32>(e_ctx->x[i]);
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}
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}
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/* If control flags are requested, get them. */
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if ((context_flags & ams::svc::ThreadContextFlag_Control) != 0) {
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if (is_64_bit) {
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out->fp = e_ctx->x[29];
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out->lr = e_ctx->x[30];
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out->sp = e_ctx->sp;
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out->pc = e_ctx->pc;
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out->pstate = (e_ctx->psr & El0PsrMask);
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/* Adjust PC if we should. */
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if (e_ctx->write == 0 && thread->IsCallingSvc()) {
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out->pc -= sizeof(u32);
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}
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out->tpidr = e_ctx->tpidr;
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} else {
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out->r[11] = static_cast<u32>(e_ctx->x[11]);
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out->r[13] = static_cast<u32>(e_ctx->x[13]);
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out->r[14] = static_cast<u32>(e_ctx->x[14]);
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out->lr = 0;
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out->sp = 0;
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out->pc = e_ctx->pc;
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out->pstate = (e_ctx->psr & El0PsrMask);
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/* Adjust PC if we should. */
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if (e_ctx->write == 0 && thread->IsCallingSvc()) {
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out->pc -= (e_ctx->psr & 0x20) ? sizeof(u16) : sizeof(u32);
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}
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out->tpidr = static_cast<u32>(e_ctx->tpidr);
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}
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}
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/* Get the FPU context. */
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R_RETURN(this->GetFpuContext(out, thread, context_flags));
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}
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Result KDebug::SetThreadContextImpl(const ams::svc::ThreadContext &ctx, KThread *thread, u32 context_flags) {
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MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
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MESOSPHERE_ASSERT(thread != GetCurrentThreadPointer());
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/* Get the exception context. */
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KExceptionContext *e_ctx = GetExceptionContext(thread);
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/* If general registers are requested, set them. */
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if ((context_flags & ams::svc::ThreadContextFlag_General) != 0) {
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if (this->Is64Bit()) {
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/* Set X0-X28. */
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for (auto i = 0; i <= 28; ++i) {
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e_ctx->x[i] = ctx.r[i];
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}
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} else {
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/* Set R0-R12. */
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for (auto i = 0; i <= 12; ++i) {
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e_ctx->x[i] = static_cast<u32>(ctx.r[i]);
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}
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}
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}
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/* If control flags are requested, set them. */
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if ((context_flags & ams::svc::ThreadContextFlag_Control) != 0) {
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/* Mark ourselve as having adjusted pc. */
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e_ctx->write = 1;
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if (this->Is64Bit()) {
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e_ctx->x[29] = ctx.fp;
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e_ctx->x[30] = ctx.lr;
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e_ctx->sp = ctx.sp;
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e_ctx->pc = ctx.pc;
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e_ctx->psr = ((ctx.pstate & El0PsrMask) | (e_ctx->psr & ~El0PsrMask));
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e_ctx->tpidr = ctx.tpidr;
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} else {
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e_ctx->x[13] = static_cast<u32>(ctx.r[13]);
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e_ctx->x[14] = static_cast<u32>(ctx.r[14]);
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e_ctx->x[30] = 0;
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e_ctx->sp = 0;
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e_ctx->pc = static_cast<u32>(ctx.pc);
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e_ctx->psr = ((ctx.pstate & El0PsrMask) | (e_ctx->psr & ~El0PsrMask));
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e_ctx->tpidr = ctx.tpidr;
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}
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}
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/* Set the FPU context. */
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R_RETURN(this->SetFpuContext(ctx, thread, context_flags));
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}
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Result KDebug::GetFpuContext(ams::svc::ThreadContext *out, KThread *thread, u32 context_flags) {
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MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
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MESOSPHERE_ASSERT(thread != GetCurrentThreadPointer());
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/* Succeed if there's nothing to do. */
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R_SUCCEED_IF((context_flags & (ams::svc::ThreadContextFlag_Fpu | ams::svc::ThreadContextFlag_FpuControl)) == 0);
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/* Get the thread context. */
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KThreadContext *t_ctx = std::addressof(thread->GetContext());
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/* Get the FPU control registers, if required. */
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if ((context_flags & ams::svc::ThreadContextFlag_FpuControl) != 0) {
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out->fpsr = t_ctx->GetFpsr();
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out->fpcr = t_ctx->GetFpcr();
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}
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/* Get the FPU registers, if required. */
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if ((context_flags & ams::svc::ThreadContextFlag_Fpu) != 0) {
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static_assert(util::size(ams::svc::ThreadContext{}.v) == KThreadContext::NumFpuRegisters);
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const u128 *f = t_ctx->GetFpuRegisters();
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if (this->Is64Bit()) {
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for (size_t i = 0; i < KThreadContext::NumFpuRegisters; ++i) {
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out->v[i] = f[i];
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}
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} else {
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for (size_t i = 0; i < KThreadContext::NumFpuRegisters / 2; ++i) {
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out->v[i] = f[i];
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}
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for (size_t i = KThreadContext::NumFpuRegisters / 2; i < KThreadContext::NumFpuRegisters; ++i) {
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out->v[i] = 0;
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}
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}
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}
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R_SUCCEED();
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}
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Result KDebug::SetFpuContext(const ams::svc::ThreadContext &ctx, KThread *thread, u32 context_flags) {
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MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
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MESOSPHERE_ASSERT(thread != GetCurrentThreadPointer());
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/* Succeed if there's nothing to do. */
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R_SUCCEED_IF((context_flags & (ams::svc::ThreadContextFlag_Fpu | ams::svc::ThreadContextFlag_FpuControl)) == 0);
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/* Get the thread context. */
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KThreadContext *t_ctx = std::addressof(thread->GetContext());
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/* Set the FPU control registers, if required. */
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if ((context_flags & ams::svc::ThreadContextFlag_FpuControl) != 0) {
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t_ctx->SetFpsr(ctx.fpsr);
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t_ctx->SetFpcr(ctx.fpcr);
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}
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/* Set the FPU registers, if required. */
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if ((context_flags & ams::svc::ThreadContextFlag_Fpu) != 0) {
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static_assert(util::size(ams::svc::ThreadContext{}.v) == KThreadContext::NumFpuRegisters);
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t_ctx->SetFpuRegisters(ctx.v, this->Is64Bit());
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}
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R_SUCCEED();
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}
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Result KDebug::BreakIfAttached(ams::svc::BreakReason break_reason, uintptr_t address, size_t size) {
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R_RETURN(KDebugBase::OnDebugEvent(ams::svc::DebugEvent_Exception, ams::svc::DebugException_UserBreak, GetProgramCounter(GetCurrentThread()), break_reason, address, size));
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}
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#define MESOSPHERE_SET_HW_BREAK_POINT(ID, FLAGS, VALUE) \
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({ \
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cpu::SetDbgBcr##ID##El1(0); \
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cpu::EnsureInstructionConsistency(); \
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cpu::SetDbgBvr##ID##El1(VALUE); \
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cpu::EnsureInstructionConsistency(); \
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cpu::SetDbgBcr##ID##El1(FLAGS); \
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cpu::EnsureInstructionConsistency(); \
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})
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#define MESOSPHERE_SET_HW_WATCH_POINT(ID, FLAGS, VALUE) \
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({ \
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cpu::SetDbgWcr##ID##El1(0); \
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cpu::EnsureInstructionConsistency(); \
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cpu::SetDbgWvr##ID##El1(VALUE); \
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cpu::EnsureInstructionConsistency(); \
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cpu::SetDbgWcr##ID##El1(FLAGS); \
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cpu::EnsureInstructionConsistency(); \
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})
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Result KDebug::SetHardwareBreakPoint(ams::svc::HardwareBreakPointRegisterName name, u64 flags, u64 value) {
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/* Get the debug feature register. */
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cpu::DebugFeatureRegisterAccessor dfr0;
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/* Extract interesting info from the debug feature register. */
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const auto num_bp = dfr0.GetNumBreakpoints();
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const auto num_wp = dfr0.GetNumWatchpoints();
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const auto num_ctx = dfr0.GetNumContextAwareBreakpoints();
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if (ams::svc::HardwareBreakPointRegisterName_I0 <= name && name <= ams::svc::HardwareBreakPointRegisterName_I15) {
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/* Check that the name is a valid instruction breakpoint. */
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R_UNLESS((name - ams::svc::HardwareBreakPointRegisterName_I0) <= num_bp, svc::ResultNotSupported());
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/* Configure flags/value. */
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if ((flags & 1) != 0) {
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/* We're enabling the breakpoint. Check that the flags are allowable. */
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R_UNLESS((flags & ForbiddenBreakPointFlagsMask) == 0, svc::ResultInvalidCombination());
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/* Require that the breakpoint be linked or match context id. */
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R_UNLESS((flags & ((1ul << 21) | (1ul << 20))) != 0, svc::ResultInvalidCombination());
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/* If the breakpoint matches context id, we need to get the context id. */
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if ((flags & (1ul << 21)) != 0) {
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/* Ensure that the breakpoint is context-aware. */
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R_UNLESS((name - ams::svc::HardwareBreakPointRegisterName_I0) >= (num_bp - num_ctx), svc::ResultNotSupported());
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/* Check that the breakpoint does not have the mismatch bit. */
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R_UNLESS((flags & (1ul << 22)) == 0, svc::ResultInvalidCombination());
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/* Get the debug object from the current handle table. */
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KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(static_cast<ams::svc::Handle>(value));
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R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
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/* Get the process from the debug object. */
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R_UNLESS(debug->IsAttached(), svc::ResultProcessTerminated());
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R_UNLESS(debug->OpenProcess(), svc::ResultProcessTerminated());
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/* Close the process when we're done. */
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ON_SCOPE_EXIT { debug->CloseProcess(); };
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/* Get the proces. */
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KProcess * const process = debug->GetProcessUnsafe();
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/* Set the value to be the context id. */
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value = process->GetId() & 0xFFFFFFFF;
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}
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/* Set the breakpoint as non-secure EL0-only. */
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flags |= (1ul << 14) | (2ul << 1);
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} else {
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/* We're disabling the breakpoint. */
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flags = 0;
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value = 0;
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}
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/* Set the breakpoint. */
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switch (name) {
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case ams::svc::HardwareBreakPointRegisterName_I0: MESOSPHERE_SET_HW_BREAK_POINT( 0, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I1: MESOSPHERE_SET_HW_BREAK_POINT( 1, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I2: MESOSPHERE_SET_HW_BREAK_POINT( 2, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I3: MESOSPHERE_SET_HW_BREAK_POINT( 3, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I4: MESOSPHERE_SET_HW_BREAK_POINT( 4, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I5: MESOSPHERE_SET_HW_BREAK_POINT( 5, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I6: MESOSPHERE_SET_HW_BREAK_POINT( 6, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I7: MESOSPHERE_SET_HW_BREAK_POINT( 7, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I8: MESOSPHERE_SET_HW_BREAK_POINT( 8, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I9: MESOSPHERE_SET_HW_BREAK_POINT( 9, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I10: MESOSPHERE_SET_HW_BREAK_POINT(10, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I11: MESOSPHERE_SET_HW_BREAK_POINT(11, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I12: MESOSPHERE_SET_HW_BREAK_POINT(12, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I13: MESOSPHERE_SET_HW_BREAK_POINT(13, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I14: MESOSPHERE_SET_HW_BREAK_POINT(14, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_I15: MESOSPHERE_SET_HW_BREAK_POINT(15, flags, value); break;
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default: break;
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}
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} else if (ams::svc::HardwareBreakPointRegisterName_D0 <= name && name <= ams::svc::HardwareBreakPointRegisterName_D15) {
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/* Check that the name is a valid data breakpoint. */
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R_UNLESS((name - ams::svc::HardwareBreakPointRegisterName_D0) <= num_wp, svc::ResultNotSupported());
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/* Configure flags/value. */
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if ((flags & 1) != 0) {
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/* We're enabling the watchpoint. Check that the flags are allowable. */
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R_UNLESS((flags & ForbiddenWatchPointFlagsMask) == 0, svc::ResultInvalidCombination());
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/* Set the breakpoint as linked non-secure EL0-only. */
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flags |= (1ul << 20) | (1ul << 14) | (2ul << 1);
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} else {
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/* We're disabling the watchpoint. */
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flags = 0;
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value = 0;
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}
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/* Set the watchkpoint. */
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switch (name) {
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case ams::svc::HardwareBreakPointRegisterName_D0: MESOSPHERE_SET_HW_WATCH_POINT( 0, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D1: MESOSPHERE_SET_HW_WATCH_POINT( 1, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D2: MESOSPHERE_SET_HW_WATCH_POINT( 2, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D3: MESOSPHERE_SET_HW_WATCH_POINT( 3, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D4: MESOSPHERE_SET_HW_WATCH_POINT( 4, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D5: MESOSPHERE_SET_HW_WATCH_POINT( 5, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D6: MESOSPHERE_SET_HW_WATCH_POINT( 6, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D7: MESOSPHERE_SET_HW_WATCH_POINT( 7, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D8: MESOSPHERE_SET_HW_WATCH_POINT( 8, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D9: MESOSPHERE_SET_HW_WATCH_POINT( 9, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D10: MESOSPHERE_SET_HW_WATCH_POINT(10, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D11: MESOSPHERE_SET_HW_WATCH_POINT(11, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D12: MESOSPHERE_SET_HW_WATCH_POINT(12, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D13: MESOSPHERE_SET_HW_WATCH_POINT(13, flags, value); break;
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case ams::svc::HardwareBreakPointRegisterName_D14: MESOSPHERE_SET_HW_WATCH_POINT(14, flags, value); break;
|
|
case ams::svc::HardwareBreakPointRegisterName_D15: MESOSPHERE_SET_HW_WATCH_POINT(15, flags, value); break;
|
|
default: break;
|
|
}
|
|
} else {
|
|
/* Invalid name. */
|
|
R_THROW(svc::ResultInvalidEnumValue());
|
|
}
|
|
|
|
R_SUCCEED();
|
|
}
|
|
|
|
#undef MESOSPHERE_SET_HW_WATCH_POINT
|
|
#undef MESOSPHERE_SET_HW_BREAK_POINT
|
|
|
|
void KDebug::PrintRegister(KThread *thread) {
|
|
#if defined(MESOSPHERE_BUILD_FOR_DEBUGGING)
|
|
{
|
|
/* Treat no thread as current thread. */
|
|
if (thread == nullptr) {
|
|
thread = GetCurrentThreadPointer();
|
|
}
|
|
|
|
/* Get the exception context. */
|
|
KExceptionContext *e_ctx = GetExceptionContext(thread);
|
|
|
|
/* Get the owner process. */
|
|
if (auto *process = thread->GetOwnerProcess(); process != nullptr) {
|
|
/* Lock the owner process. */
|
|
KScopedLightLock state_lk(process->GetStateLock());
|
|
KScopedLightLock list_lk(process->GetListLock());
|
|
|
|
/* Suspend all the process's threads. */
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
|
|
auto end = process->GetThreadList().end();
|
|
for (auto it = process->GetThreadList().begin(); it != end; ++it) {
|
|
if (std::addressof(*it) != GetCurrentThreadPointer()) {
|
|
it->RequestSuspend(KThread::SuspendType_Backtrace);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Print the registers. */
|
|
MESOSPHERE_RELEASE_LOG("Registers\n");
|
|
if ((e_ctx->psr & 0x10) == 0) {
|
|
/* 64-bit thread. */
|
|
for (auto i = 0; i < 31; ++i) {
|
|
MESOSPHERE_RELEASE_LOG(" X[%2d]: 0x%016lx\n", i, e_ctx->x[i]);
|
|
}
|
|
MESOSPHERE_RELEASE_LOG(" SP: 0x%016lx\n", e_ctx->sp);
|
|
MESOSPHERE_RELEASE_LOG(" PC: 0x%016lx\n", e_ctx->pc - sizeof(u32));
|
|
MESOSPHERE_RELEASE_LOG(" PSR: 0x%08x\n", e_ctx->psr);
|
|
MESOSPHERE_RELEASE_LOG(" TPIDR_EL0: 0x%016lx\n", e_ctx->tpidr);
|
|
} else {
|
|
/* 32-bit thread. */
|
|
for (auto i = 0; i < 13; ++i) {
|
|
MESOSPHERE_RELEASE_LOG(" R[%2d]: 0x%08x\n", i, static_cast<u32>(e_ctx->x[i]));
|
|
}
|
|
MESOSPHERE_RELEASE_LOG(" SP: 0x%08x\n", static_cast<u32>(e_ctx->x[13]));
|
|
MESOSPHERE_RELEASE_LOG(" LR: 0x%08x\n", static_cast<u32>(e_ctx->x[14]));
|
|
MESOSPHERE_RELEASE_LOG(" PC: 0x%08x\n", static_cast<u32>(e_ctx->pc) - static_cast<u32>((e_ctx->psr & 0x20) ? sizeof(u16) : sizeof(u32)));
|
|
MESOSPHERE_RELEASE_LOG(" PSR: 0x%08x\n", e_ctx->psr);
|
|
MESOSPHERE_RELEASE_LOG(" TPIDR: 0x%08x\n", static_cast<u32>(e_ctx->tpidr));
|
|
}
|
|
|
|
/* Resume the threads that we suspended. */
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
|
|
auto end = process->GetThreadList().end();
|
|
for (auto it = process->GetThreadList().begin(); it != end; ++it) {
|
|
if (std::addressof(*it) != GetCurrentThreadPointer()) {
|
|
it->Resume(KThread::SuspendType_Backtrace);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#else
|
|
MESOSPHERE_UNUSED(thread);
|
|
#endif
|
|
}
|
|
|
|
#if defined(MESOSPHERE_BUILD_FOR_DEBUGGING)
|
|
namespace {
|
|
|
|
bool IsHeapPhysicalAddress(KPhysicalAddress phys_addr) {
|
|
const KMemoryRegion *cached = nullptr;
|
|
return KMemoryLayout::IsHeapPhysicalAddress(cached, phys_addr);
|
|
}
|
|
|
|
template<typename T>
|
|
bool ReadValue(T *out, KProcess *process, uintptr_t address) {
|
|
KPhysicalAddress phys_addr;
|
|
KMemoryInfo mem_info;
|
|
ams::svc::PageInfo page_info;
|
|
|
|
if (!util::IsAligned(address, sizeof(T))) {
|
|
return false;
|
|
}
|
|
if (R_FAILED(process->GetPageTable().QueryInfo(std::addressof(mem_info), std::addressof(page_info), address))) {
|
|
return false;
|
|
}
|
|
if ((mem_info.GetPermission() & KMemoryPermission_UserRead) != KMemoryPermission_UserRead) {
|
|
return false;
|
|
}
|
|
if (!process->GetPageTable().GetPhysicalAddress(std::addressof(phys_addr), address)) {
|
|
return false;
|
|
}
|
|
if (!IsHeapPhysicalAddress(phys_addr)) {
|
|
return false;
|
|
}
|
|
|
|
*out = *GetPointer<T>(process->GetPageTable().GetHeapVirtualAddress(phys_addr));
|
|
return true;
|
|
}
|
|
|
|
bool GetModuleName(char *dst, size_t dst_size, KProcess *process, uintptr_t base_address) {
|
|
/* Locate .rodata. */
|
|
KMemoryInfo mem_info;
|
|
ams::svc::PageInfo page_info;
|
|
KMemoryState mem_state = KMemoryState_None;
|
|
|
|
while (true) {
|
|
if (R_FAILED(process->GetPageTable().QueryInfo(std::addressof(mem_info), std::addressof(page_info), base_address))) {
|
|
return false;
|
|
}
|
|
if (mem_state == KMemoryState_None) {
|
|
mem_state = mem_info.GetState();
|
|
if (mem_state != KMemoryState_Code && mem_state != KMemoryState_AliasCode) {
|
|
return false;
|
|
}
|
|
}
|
|
if (mem_info.GetState() != mem_state) {
|
|
return false;
|
|
}
|
|
if (mem_info.GetPermission() == KMemoryPermission_UserRead) {
|
|
break;
|
|
}
|
|
base_address = mem_info.GetEndAddress();
|
|
}
|
|
|
|
/* Check that first value is 0. */
|
|
u32 val;
|
|
if (!ReadValue(std::addressof(val), process, base_address)) {
|
|
return false;
|
|
}
|
|
if (val != 0) {
|
|
return false;
|
|
}
|
|
|
|
/* Read the name length. */
|
|
if (!ReadValue(std::addressof(val), process, base_address + sizeof(u32))) {
|
|
return false;
|
|
}
|
|
if (!(0 < val && val < dst_size)) {
|
|
return false;
|
|
}
|
|
const size_t name_len = val;
|
|
|
|
/* Read the name, one character at a time. */
|
|
for (size_t i = 0; i < name_len; ++i) {
|
|
if (!ReadValue(dst + i, process, base_address + 2 * sizeof(u32) + i)) {
|
|
return false;
|
|
}
|
|
if (!(0 < dst[i] && dst[i] <= 0x7F)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/* NULL-terminate. */
|
|
dst[name_len] = 0;
|
|
|
|
return true;
|
|
}
|
|
|
|
void PrintAddress(uintptr_t address) {
|
|
MESOSPHERE_RELEASE_LOG(" %p\n", reinterpret_cast<void *>(address));
|
|
}
|
|
|
|
void PrintAddressWithModuleName(uintptr_t address, bool has_module_name, const char *module_name, uintptr_t base_address) {
|
|
if (has_module_name) {
|
|
MESOSPHERE_RELEASE_LOG(" %p [%10s + %8lx]\n", reinterpret_cast<void *>(address), module_name, address - base_address);
|
|
} else {
|
|
MESOSPHERE_RELEASE_LOG(" %p [%10lx + %8lx]\n", reinterpret_cast<void *>(address), base_address, address - base_address);
|
|
}
|
|
}
|
|
|
|
void PrintAddressWithSymbol(uintptr_t address, bool has_module_name, const char *module_name, uintptr_t base_address, const char *symbol_name, uintptr_t func_address) {
|
|
if (has_module_name) {
|
|
MESOSPHERE_RELEASE_LOG(" %p [%10s + %8lx] (%s + %lx)\n", reinterpret_cast<void *>(address), module_name, address - base_address, symbol_name, address - func_address);
|
|
} else {
|
|
MESOSPHERE_RELEASE_LOG(" %p [%10lx + %8lx] (%s + %lx)\n", reinterpret_cast<void *>(address), base_address, address - base_address, symbol_name, address - func_address);
|
|
}
|
|
}
|
|
|
|
void PrintCodeAddress(KProcess *process, uintptr_t address, bool is_lr = true) {
|
|
/* Prepare to parse + print the address. */
|
|
uintptr_t test_address = is_lr ? address - sizeof(u32) : address;
|
|
uintptr_t base_address = address;
|
|
uintptr_t dyn_address = 0;
|
|
uintptr_t sym_tab = 0;
|
|
uintptr_t str_tab = 0;
|
|
size_t num_sym = 0;
|
|
|
|
u64 temp_64;
|
|
u32 temp_32;
|
|
|
|
/* Locate the start of .text. */
|
|
KMemoryInfo mem_info;
|
|
ams::svc::PageInfo page_info;
|
|
KMemoryState mem_state = KMemoryState_None;
|
|
while (true) {
|
|
if (R_FAILED(process->GetPageTable().QueryInfo(std::addressof(mem_info), std::addressof(page_info), base_address))) {
|
|
return PrintAddress(address);
|
|
}
|
|
if (mem_state == KMemoryState_None) {
|
|
mem_state = mem_info.GetState();
|
|
if (mem_state != KMemoryState_Code && mem_state != KMemoryState_AliasCode) {
|
|
return PrintAddress(address);
|
|
}
|
|
} else if (mem_info.GetState() != mem_state) {
|
|
return PrintAddress(address);
|
|
}
|
|
if (mem_info.GetPermission() != KMemoryPermission_UserReadExecute) {
|
|
return PrintAddress(address);
|
|
}
|
|
base_address = mem_info.GetAddress();
|
|
|
|
if (R_FAILED(process->GetPageTable().QueryInfo(std::addressof(mem_info), std::addressof(page_info), base_address - 1))) {
|
|
return PrintAddress(address);
|
|
}
|
|
if (mem_info.GetState() != mem_state) {
|
|
break;
|
|
}
|
|
if (mem_info.GetPermission() != KMemoryPermission_UserReadExecute) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Read the first instruction. */
|
|
if (!ReadValue(std::addressof(temp_32), process, base_address)) {
|
|
return PrintAddress(address);
|
|
}
|
|
|
|
/* Get the module name. */
|
|
char module_name[0x20];
|
|
const bool has_module_name = GetModuleName(module_name, sizeof(module_name), process, base_address);
|
|
|
|
/* If the process is 32-bit, just print the module. */
|
|
if (!process->Is64Bit()) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
|
|
if (temp_32 == 0) {
|
|
/* Module is dynamically loaded by rtld. */
|
|
u32 mod_offset;
|
|
if (!ReadValue(std::addressof(mod_offset), process, base_address + sizeof(u32))) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
if (!ReadValue(std::addressof(temp_32), process, base_address + mod_offset)) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
if (temp_32 != 0x30444F4D) { /* MOD0 */
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
if (!ReadValue(std::addressof(temp_32), process, base_address + mod_offset + sizeof(u32))) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
dyn_address = base_address + mod_offset + temp_32;
|
|
} else if (temp_32 == 0x14000002) {
|
|
/* Module embeds rtld. */
|
|
if (!ReadValue(std::addressof(temp_32), process, base_address + 0x5C)) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
if (temp_32 != 0x94000002) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
if (!ReadValue(std::addressof(temp_32), process, base_address + 0x60)) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
dyn_address = base_address + 0x60 + temp_32;
|
|
} else {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
|
|
/* Locate tables inside .dyn. */
|
|
for (size_t ofs = 0; /* ... */; ofs += 0x10) {
|
|
/* Read the DynamicTag. */
|
|
if (!ReadValue(std::addressof(temp_64), process, dyn_address + ofs)) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
if (temp_64 == 0) {
|
|
/* We're done parsing .dyn. */
|
|
break;
|
|
} else if (temp_64 == 4) {
|
|
/* We found DT_HASH */
|
|
if (!ReadValue(std::addressof(temp_64), process, dyn_address + ofs + sizeof(u64))) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
/* Read nchain, to get the number of symbols. */
|
|
if (!ReadValue(std::addressof(temp_32), process, base_address + temp_64 + sizeof(u32))) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
|
|
num_sym = temp_32;
|
|
} else if (temp_64 == 5) {
|
|
/* We found DT_STRTAB */
|
|
if (!ReadValue(std::addressof(temp_64), process, dyn_address + ofs + sizeof(u64))) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
|
|
str_tab = base_address + temp_64;
|
|
} else if (temp_64 == 6) {
|
|
/* We found DT_SYMTAB */
|
|
if (!ReadValue(std::addressof(temp_64), process, dyn_address + ofs + sizeof(u64))) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
|
|
sym_tab = base_address + temp_64;
|
|
}
|
|
}
|
|
|
|
/* Check that we found all the tables. */
|
|
if (!(sym_tab != 0 && str_tab != 0 && num_sym != 0)) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
|
|
/* Try to locate an appropriate symbol. */
|
|
for (size_t i = 0; i < num_sym; ++i) {
|
|
/* Read the symbol from userspace. */
|
|
struct {
|
|
u32 st_name;
|
|
u8 st_info;
|
|
u8 st_other;
|
|
u16 st_shndx;
|
|
u64 st_value;
|
|
u64 st_size;
|
|
} sym;
|
|
{
|
|
u64 x[sizeof(sym) / sizeof(u64)];
|
|
for (size_t j = 0; j < util::size(x); ++j) {
|
|
if (!ReadValue(x + j, process, sym_tab + sizeof(sym) * i + sizeof(u64) * j)) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
}
|
|
std::memcpy(std::addressof(sym), x, sizeof(sym));
|
|
}
|
|
|
|
/* Check the symbol is valid/STT_FUNC. */
|
|
if (sym.st_shndx == 0 || ((sym.st_shndx & 0xFF00) == 0xFF00)) {
|
|
continue;
|
|
}
|
|
if ((sym.st_info & 0xF) != 2) {
|
|
continue;
|
|
}
|
|
|
|
/* Check the address. */
|
|
const uintptr_t func_start = base_address + sym.st_value;
|
|
if (func_start <= test_address && test_address < func_start + sym.st_size) {
|
|
/* Read the symbol name. */
|
|
const uintptr_t sym_address = str_tab + sym.st_name;
|
|
char sym_name[0x80];
|
|
sym_name[util::size(sym_name) - 1] = 0;
|
|
for (size_t j = 0; j < util::size(sym_name) - 1; ++j) {
|
|
if (!ReadValue(sym_name + j, process, sym_address + j)) {
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
if (sym_name[j] == 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Print the symbol. */
|
|
return PrintAddressWithSymbol(address, has_module_name, module_name, base_address, sym_name, func_start);
|
|
}
|
|
}
|
|
|
|
/* Fall back to printing the module. */
|
|
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
|
|
}
|
|
|
|
}
|
|
#endif
|
|
|
|
void KDebug::PrintBacktrace(KThread *thread) {
|
|
#if defined(MESOSPHERE_BUILD_FOR_DEBUGGING)
|
|
{
|
|
/* Treat no thread as current thread. */
|
|
if (thread == nullptr) {
|
|
thread = GetCurrentThreadPointer();
|
|
}
|
|
|
|
/* Get the exception context. */
|
|
KExceptionContext *e_ctx = GetExceptionContext(thread);
|
|
|
|
/* Get the owner process. */
|
|
if (auto *process = thread->GetOwnerProcess(); process != nullptr) {
|
|
/* Lock the owner process. */
|
|
KScopedLightLock state_lk(process->GetStateLock());
|
|
KScopedLightLock list_lk(process->GetListLock());
|
|
|
|
/* Suspend all the process's threads. */
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
|
|
auto end = process->GetThreadList().end();
|
|
for (auto it = process->GetThreadList().begin(); it != end; ++it) {
|
|
if (std::addressof(*it) != GetCurrentThreadPointer()) {
|
|
it->RequestSuspend(KThread::SuspendType_Backtrace);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Print the backtrace. */
|
|
MESOSPHERE_RELEASE_LOG("User Backtrace\n");
|
|
if ((e_ctx->psr & 0x10) == 0) {
|
|
/* 64-bit thread. */
|
|
PrintCodeAddress(process, e_ctx->pc, false);
|
|
PrintCodeAddress(process, e_ctx->x[30]);
|
|
|
|
/* Walk the stack frames. */
|
|
uintptr_t fp = static_cast<uintptr_t>(e_ctx->x[29]);
|
|
for (auto i = 0; i < 0x20 && fp != 0 && util::IsAligned(fp, 0x10); ++i) {
|
|
/* Read the next frame. */
|
|
struct {
|
|
u64 fp;
|
|
u64 lr;
|
|
} stack_frame;
|
|
{
|
|
KMemoryInfo mem_info;
|
|
ams::svc::PageInfo page_info;
|
|
KPhysicalAddress phys_addr;
|
|
|
|
if (R_FAILED(process->GetPageTable().QueryInfo(std::addressof(mem_info), std::addressof(page_info), fp))) {
|
|
break;
|
|
}
|
|
if ((mem_info.GetState() & KMemoryState_FlagReferenceCounted) == 0) {
|
|
break;
|
|
}
|
|
if ((mem_info.GetAttribute() & KMemoryAttribute_Uncached) != 0) {
|
|
break;
|
|
}
|
|
if ((mem_info.GetPermission() & KMemoryPermission_UserRead) != KMemoryPermission_UserRead) {
|
|
break;
|
|
}
|
|
if (!process->GetPageTable().GetPhysicalAddress(std::addressof(phys_addr), fp)) {
|
|
break;
|
|
}
|
|
if (!IsHeapPhysicalAddress(phys_addr)) {
|
|
break;
|
|
}
|
|
|
|
u64 *frame_ptr = GetPointer<u64>(process->GetPageTable().GetHeapVirtualAddress(phys_addr));
|
|
stack_frame.fp = frame_ptr[0];
|
|
stack_frame.lr = frame_ptr[1];
|
|
}
|
|
|
|
/* Print and advance. */
|
|
PrintCodeAddress(process, stack_frame.lr);
|
|
fp = stack_frame.fp;
|
|
}
|
|
} else {
|
|
/* 32-bit thread. */
|
|
PrintCodeAddress(process, e_ctx->pc, false);
|
|
PrintCodeAddress(process, e_ctx->x[14]);
|
|
|
|
/* Walk the stack frames. */
|
|
uintptr_t fp = static_cast<uintptr_t>(e_ctx->x[11]);
|
|
for (auto i = 0; i < 0x20 && fp != 0 && util::IsAligned(fp, 4); ++i) {
|
|
/* Read the next frame. */
|
|
struct {
|
|
u32 fp;
|
|
u32 lr;
|
|
} stack_frame;
|
|
{
|
|
KMemoryInfo mem_info;
|
|
ams::svc::PageInfo page_info;
|
|
KPhysicalAddress phys_addr;
|
|
|
|
/* Read FP */
|
|
if (R_FAILED(process->GetPageTable().QueryInfo(std::addressof(mem_info), std::addressof(page_info), fp))) {
|
|
break;
|
|
}
|
|
if ((mem_info.GetState() & KMemoryState_FlagReferenceCounted) == 0) {
|
|
break;
|
|
}
|
|
if ((mem_info.GetAttribute() & KMemoryAttribute_Uncached) != 0) {
|
|
break;
|
|
}
|
|
if ((mem_info.GetPermission() & KMemoryPermission_UserRead) != KMemoryPermission_UserRead) {
|
|
break;
|
|
}
|
|
if (!process->GetPageTable().GetPhysicalAddress(std::addressof(phys_addr), fp)) {
|
|
break;
|
|
}
|
|
if (!IsHeapPhysicalAddress(phys_addr)) {
|
|
break;
|
|
}
|
|
|
|
stack_frame.fp = *GetPointer<u32>(process->GetPageTable().GetHeapVirtualAddress(phys_addr));
|
|
|
|
/* Read LR. */
|
|
uintptr_t lr_ptr = (e_ctx->x[13] <= stack_frame.fp && stack_frame.fp < e_ctx->x[13] + PageSize) ? fp + 4 : fp - 4;
|
|
if (R_FAILED(process->GetPageTable().QueryInfo(std::addressof(mem_info), std::addressof(page_info), lr_ptr))) {
|
|
break;
|
|
}
|
|
if ((mem_info.GetState() & KMemoryState_FlagReferenceCounted) == 0) {
|
|
break;
|
|
}
|
|
if ((mem_info.GetAttribute() & KMemoryAttribute_Uncached) != 0) {
|
|
break;
|
|
}
|
|
if ((mem_info.GetPermission() & KMemoryPermission_UserRead) != KMemoryPermission_UserRead) {
|
|
break;
|
|
}
|
|
if (!process->GetPageTable().GetPhysicalAddress(std::addressof(phys_addr), lr_ptr)) {
|
|
break;
|
|
}
|
|
if (!IsHeapPhysicalAddress(phys_addr)) {
|
|
break;
|
|
}
|
|
|
|
stack_frame.lr = *GetPointer<u32>(process->GetPageTable().GetHeapVirtualAddress(phys_addr));
|
|
}
|
|
|
|
/* Print and advance. */
|
|
PrintCodeAddress(process, stack_frame.lr);
|
|
fp = stack_frame.fp;
|
|
}
|
|
}
|
|
|
|
/* Resume the threads that we suspended. */
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
|
|
auto end = process->GetThreadList().end();
|
|
for (auto it = process->GetThreadList().begin(); it != end; ++it) {
|
|
if (std::addressof(*it) != GetCurrentThreadPointer()) {
|
|
it->Resume(KThread::SuspendType_Backtrace);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#else
|
|
MESOSPHERE_UNUSED(thread);
|
|
#endif
|
|
}
|
|
|
|
}
|