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nvmap: Return the address of the nvmap object when Freeing it for the last time.

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This behavior is confirmed by reverse engineering.
This commit is contained in:
Subv 2018-07-01 10:48:50 -05:00
parent 50ef2beb58
commit a093feca62
2 changed files with 11 additions and 4 deletions
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13
src/core/hle/service/nvdrv/devices/nvmap.cpp
View file

@ -148,6 +148,7 @@ u32 nvmap::IocParam(const std::vector<u8>& input, std::vector<u8>& output) {
} }
u32 nvmap::IocFree(const std::vector<u8>& input, std::vector<u8>& output) { u32 nvmap::IocFree(const std::vector<u8>& input, std::vector<u8>& output) {
// TODO(Subv): These flags are unconfirmed.
enum FreeFlags { enum FreeFlags {
Freed = 0, Freed = 0,
NotFreedYet = 1, NotFreedYet = 1,
@ -161,15 +162,21 @@ u32 nvmap::IocFree(const std::vector<u8>& input, std::vector<u8>& output) {
auto itr = handles.find(params.handle); auto itr = handles.find(params.handle);
ASSERT(itr != handles.end()); ASSERT(itr != handles.end());
ASSERT(itr->second->refcount > 0);
itr->second->refcount--; itr->second->refcount--;
params.refcount = itr->second->refcount;
params.size = itr->second->size; params.size = itr->second->size;
if (itr->second->refcount == 0) if (itr->second->refcount == 0) {
params.flags = Freed; params.flags = Freed;
else // The address of the nvmap is written to the output if we're finally freeing it, otherwise
// 0 is written.
params.address = itr->second->addr;
} else {
params.flags = NotFreedYet; params.flags = NotFreedYet;
params.address = 0;
}
handles.erase(params.handle); handles.erase(params.handle);

2
src/core/hle/service/nvdrv/devices/nvmap.h
View file

@ -94,7 +94,7 @@ private:
struct IocFreeParams { struct IocFreeParams {
u32_le handle; u32_le handle;
INSERT_PADDING_BYTES(4); INSERT_PADDING_BYTES(4);
u64_le refcount; u64_le address;
u32_le size; u32_le size;
u32_le flags; u32_le flags;
}; };