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kern: implement SvcGetProcessList

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This commit is contained in:
Michael Scire 2020-07-14 13:22:08 -07:00 committed by SciresM
parent cfddb75398
commit fe035736ca
3 changed files with 64 additions and 2 deletions
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3
libraries/libmesosphere/include/mesosphere/kern_k_process.hpp
View file

@ -231,6 +231,9 @@ namespace ams::kern {
return this->cond_var.Wait(address, cv_key, tag, ns);
}
static KProcess *GetProcessFromId(u64 process_id);
static Result GetProcessList(s32 *out_num_processes, ams::kern::svc::KUserPointer<u64 *> out_process_ids, s32 max_out_count);
static void Switch(KProcess *cur_process, KProcess *next_process) {
/* Set the current process pointer. */
SetCurrentProcess(next_process);

48
libraries/libmesosphere/source/kern_k_process.cpp
View file

@ -455,4 +455,52 @@ namespace ams::kern {
MESOSPHERE_UNIMPLEMENTED();
}
KProcess *KProcess::GetProcessFromId(u64 process_id) {
/* Lock the list. */
ListAccessor accessor;
const auto end = accessor.end();
/* Iterate over the list. */
for (auto it = accessor.begin(); it != end; ++it) {
/* Get the process. */
KProcess *process = static_cast<KProcess *>(std::addressof(*it));
if (process->GetId() == process_id) {
if (AMS_LIKELY(process->Open())) {
return process;
}
}
}
/* We failed to find the process. */
return nullptr;
}
Result KProcess::GetProcessList(s32 *out_num_processes, ams::kern::svc::KUserPointer<u64 *> out_process_ids, s32 max_out_count) {
/* Lock the list. */
ListAccessor accessor;
const auto end = accessor.end();
/* Iterate over the list. */
s32 count = 0;
for (auto it = accessor.begin(); it != end; ++it) {
/* If we're within array bounds, write the id. */
if (count < max_out_count) {
/* Get the process id. */
KProcess *process = static_cast<KProcess *>(std::addressof(*it));
const u64 id = process->GetId();
/* Copy the id to userland. */
R_TRY(out_process_ids.CopyArrayElementFrom(std::addressof(id), count));
}
/* Increment the count. */
++count;
}
/* We successfully iterated the list. */
*out_num_processes = count;
return ResultSuccess();
}
}

15
libraries/libmesosphere/source/svc/kern_svc_process.cpp
View file

@ -52,7 +52,18 @@ namespace ams::kern::svc {
return ResultSuccess();
}
Result GetProcessList(int32_t *out_num_processes, KUserPointer<uint64_t *> out_process_ids, int32_t max_out_count) {
/* Validate that the out count is valid. */
R_UNLESS((0 <= max_out_count && max_out_count <= static_cast<int32_t>(std::numeric_limits<int32_t>::max() / sizeof(u64))), svc::ResultOutOfRange());
/* Validate that the pointer is in range. */
if (max_out_count > 0) {
R_UNLESS(GetCurrentProcess().GetPageTable().Contains(KProcessAddress(out_process_ids.GetUnsafePointer()), max_out_count * sizeof(u64)), svc::ResultInvalidCurrentMemory());
}
/* Get the process list. */
return KProcess::GetProcessList(out_num_processes, out_process_ids, max_out_count);
}
}
@ -67,7 +78,7 @@ namespace ams::kern::svc {
}
Result GetProcessList64(int32_t *out_num_processes, KUserPointer<uint64_t *> out_process_ids, int32_t max_out_count) {
MESOSPHERE_PANIC("Stubbed SvcGetProcessList64 was called.");
return GetProcessList(out_num_processes, out_process_ids, max_out_count);
}
Result CreateProcess64(ams::svc::Handle *out_handle, KUserPointer<const ams::svc::lp64::CreateProcessParameter *> parameters, KUserPointer<const uint32_t *> caps, int32_t num_caps) {
@ -97,7 +108,7 @@ namespace ams::kern::svc {
}
Result GetProcessList64From32(int32_t *out_num_processes, KUserPointer<uint64_t *> out_process_ids, int32_t max_out_count) {
MESOSPHERE_PANIC("Stubbed SvcGetProcessList64From32 was called.");
return GetProcessList(out_num_processes, out_process_ids, max_out_count);
}
Result CreateProcess64From32(ams::svc::Handle *out_handle, KUserPointer<const ams::svc::ilp32::CreateProcessParameter *> parameters, KUserPointer<const uint32_t *> caps, int32_t num_caps) {