add ksceKernelGetThreadCpuRegisters

This function is used to get the state of the registers for a SUSPENDED thread. It returns the registers in a two part structure. It's uncertian what the difference is between the two parts. It seems like its a user/kernel separation, but it's uncertain. It could also be a current/exception difference, but it is unconvincing. In normal usage on a suspended thread it seems to be the user aspect that contains valid values. When you query a suspended thread that has no had the opportunity to start yet, the kernel side is filled.

1 files changed, 46 insertions, 0 deletions

diff --git a/include/kernel/kernel/threadmgr.h b/include/kernel/kernel/threadmgr.h
index f0e45fc..f5ab960 100644
--- a/include/kernel/kernel/threadmgr.h
+++ b/include/kernel/kernel/threadmgr.h
@@ -855,6 +855,52 @@ int sceKernelEnqueueWorkQueue(SceUID uid, const char *name, SceKernelWorkQueueWo
  */
 int sceKernelGetThreadIdList(SceUID pid, SceUID *ids, int n, int *copy_count);
 
+/** Structure representing all ARM registers */
+typedef struct ArmCpuRegisters
+{
+    uint32_t    r0;
+    uint32_t    r1;
+    uint32_t    r2;
+    uint32_t    r3;
+    uint32_t    r4;
+    uint32_t    r5;
+    uint32_t    r6;
+    uint32_t    r7;
+    uint32_t    r8;
+    uint32_t    r9;
+    uint32_t    r10;
+    uint32_t    r11;
+    uint32_t    r12;
+    uint32_t    sp;
+    uint32_t    lr;
+    uint32_t    pc;
+    uint32_t    cpsr;
+    uint32_t    unk;
+} ArmCpuRegisters;
+
+/** Structure containing a threads register states. */
+typedef struct ThreadCpuRegisters
+{
+    /** Set of registers used for user mode. */
+    ArmCpuRegisters user;
+
+    /** Set of registers used for kernel mode. */
+    ArmCpuRegisters kernel;
+} ThreadCpuRegisters;
+
+/**
+ * @brief       Query the state of the registers for a suspended thread.
+ *
+ * The registers returned are the user/kernel set for the requested thread.
+ * It's not certain that user/kernel is correct representation, instead it could be current/exception.
+ * The thread provided must be suspended for this function to succeed.
+ *
+ * @param[in]   thid        The thread to query.
+ * @param[out]  registers   The set of registers belonging to the thread.
+ * @return      Zero on success, else < 0 on error.
+ */
+int sceKernelGetThreadCpuRegisters(SceUID thid, ThreadCpuRegisters *registers);
+
 #ifdef __cplusplus
 }
 #endif