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apt: add deliver arg support to chainloader + minor fixes

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This commit is contained in:
TuxSH 2023-02-25 20:39:04 +00:00
parent 98324d412f
commit b18f04d887
2 changed files with 45 additions and 6 deletions
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15
libctru/include/3ds/services/apt.h
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@ -237,9 +237,22 @@ void aptClearChainloader(void);
*/
void aptSetChainloader(u64 programID, u8 mediatype);
/// Configures the chainloader to launch the previous application.
void aptSetChainloaderToCaller(void);
/// Configures the chainloader to relaunch the current application (i.e. soft-reset)
void aptSetChainloaderToSelf(void);
/**
* @brief Sets the "deliver arg" and HMAC for the chainloader, which will
* be passed to the target 3DS/DS(i) application. The meaning of each
* parameter varies on a per-application basis.
* @param deliverArg Deliver arg to pass to the target application.
* @param deliverArgSize Size of the deliver arg, maximum 0x300 bytes.
* @param hmac HMAC buffer, 32 bytes. Use NULL to pass an all-zero dummy HMAC.
*/
void aptSetChainloaderArgs(const void *deliverArg, size_t deliverArgSize, const void *hmac);
/**
* @brief Gets an APT lock handle.
* @param flags Flags to use.
@ -565,4 +578,4 @@ Result APT_GetSharedFont(Handle* fontHandle, u32* mapAddr);
* @param sender Pointer to output the sender's AppID to.
* @param received Pointer to output whether an argument was received to.
*/
Result APT_ReceiveDeliverArg(const void* param, size_t paramSize, const void* hmac, u64* sender, bool* received);
Result APT_ReceiveDeliverArg(void* param, size_t paramSize, void* hmac, u64* sender, bool* received);

36
libctru/source/services/apt.c
View File

@ -63,9 +63,12 @@ enum
static u8 aptHomeButtonState;
static u32 aptFlags;
static u32 aptParameters[0x1000/4];
static u8 aptChainloadFlags;
static u64 aptChainloadTid;
static u8 aptChainloadDeliverArg[0x300];
static u32 aptChainloadDeliverArgSize = sizeof(aptChainloadDeliverArg);
static u8 aptChainloadHmac[0x20];
static u8 aptChainloadMediatype;
static u8 aptChainloadFlags;
typedef enum
{
@ -315,6 +318,9 @@ static void aptClearJumpToHome(void)
void aptClearChainloader(void)
{
aptFlags &= ~FLAG_CHAINLOAD;
aptChainloadDeliverArgSize = sizeof(aptChainloadDeliverArg);
memset(aptChainloadDeliverArg, 0, sizeof(aptChainloadDeliverArg));
memset(aptChainloadHmac, 0, sizeof(aptChainloadHmac));
}
void aptSetChainloader(u64 programID, u8 mediatype)
@ -325,6 +331,14 @@ void aptSetChainloader(u64 programID, u8 mediatype)
aptChainloadMediatype = mediatype;
}
void aptSetChainloaderToCaller(void)
{
aptFlags |= FLAG_CHAINLOAD;
aptChainloadFlags = 1;
aptChainloadTid = 0;
aptChainloadMediatype = 0;
}
void aptSetChainloaderToSelf(void)
{
aptFlags |= FLAG_CHAINLOAD;
@ -333,6 +347,20 @@ void aptSetChainloaderToSelf(void)
aptChainloadMediatype = 0;
}
void aptSetChainloaderArgs(const void *deliverArg, size_t deliverArgSize, const void *hmac)
{
if (deliverArgSize >= sizeof(aptChainloadDeliverArg))
deliverArgSize = sizeof(aptChainloadDeliverArg);
aptChainloadDeliverArgSize = deliverArgSize;
memcpy(aptChainloadDeliverArg, deliverArg, deliverArgSize);
if (hmac != NULL)
memcpy(aptChainloadHmac, hmac, sizeof(aptChainloadHmac));
else
memset(aptChainloadHmac, 0, sizeof(aptChainloadHmac));
}
extern void (*__system_retAddr)(void);
static void aptExitProcess(void)
@ -370,10 +398,8 @@ void aptExit(void)
if (R_SUCCEEDED(APT_IsRegistered(aptGetMenuAppID(), &hmRegistered)) && hmRegistered)
{
// Normal, sane chainload
u8 param[0x300] = {0};
u8 hmac[0x20] = {0};
APT_PrepareToDoApplicationJump(aptChainloadFlags, aptChainloadTid, aptChainloadMediatype);
APT_DoApplicationJump(param, sizeof(param), hmac);
APT_DoApplicationJump(aptChainloadDeliverArg, aptChainloadDeliverArgSize, aptChainloadHmac);
}
else
{
@ -1430,7 +1456,7 @@ Result APT_GetSharedFont(Handle* fontHandle, u32* mapAddr)
return ret;
}
Result APT_ReceiveDeliverArg(const void* param, size_t paramSize, const void* hmac, u64* sender, bool* received)
Result APT_ReceiveDeliverArg(void* param, size_t paramSize, void* hmac, u64* sender, bool* received)
{
u32 cmdbuf[16];
cmdbuf[0]=IPC_MakeHeader(0x35,2,0); // 0x350080