Initial commit

arm9/source/core/semihosting.h

@@ -0,0 +1,137 @@
+#pragma once
+#include <string.h>
+
+#define SYS_CLOSE           0x02
+#define SYS_CLOCK           0x10
+#define SYS_ELAPSED         0x30
+#define SYS_ERRNO           0x13
+#define SYS_FLEN            0x0C
+#define SYS_GET_CMDLINE     0x15
+#define SYS_HEAPINFO        0x16
+#define SYS_ISERROR         0x08
+#define SYS_ISTTY           0x09
+#define SYS_OPEN            0x01
+#define SYS_READ            0x06
+#define SYS_READC           0x07
+#define SYS_REMOVE          0x0E
+#define SYS_SEEK            0x0A
+#define SYS_SYSTEM          0x12
+#define SYS_TICKFREQ        0x31
+#define SYS_TIME            0x11
+#define SYS_TMPNAM          0x0D
+#define SYS_WRITE           0x05
+#define SYS_WRITEC          0x03
+#define SYS_WRITE0          0x04
+
+#define SH_OPEN_MODE_R          0
+#define SH_OPEN_MODE_RB         1
+#define SH_OPEN_MODE_R_PLUS     2
+#define SH_OPEN_MODE_R_PLUS_B   3
+#define SH_OPEN_MODE_W          4
+#define SH_OPEN_MODE_WB         5
+#define SH_OPEN_MODE_W_PLUS     6
+#define SH_OPEN_MODE_W_PLUS_B   7
+#define SH_OPEN_MODE_A          8
+#define SH_OPEN_MODE_AB         9
+#define SH_OPEN_MODE_A_PLUS    10
+#define SH_OPEN_MODE_A_PLUS_B  11
+
+typedef struct
+{
+    const char* path;
+    u32 mode;
+    u32 pathLength;
+} semihosting_open_params_t;
+
+typedef struct
+{
+    int handle;
+    void* buffer;
+    u32 length;
+} semihosting_read_params_t;
+
+typedef struct
+{
+    int handle;
+    const void* buffer;
+    u32 length;
+} semihosting_write_params_t;
+
+typedef struct
+{
+    int handle;
+    u32 position;
+} semihosting_seek_params_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int sh_callSemihostingFunction(int function, const void* parameters);
+
+static inline void sh_writeChar(char c)
+{
+    sh_callSemihostingFunction(SYS_WRITEC, &c);
+}
+
+static inline void sh_writeString(const char* str)
+{
+    sh_callSemihostingFunction(SYS_WRITE0, str);
+}
+
+static inline int sh_openFile(const char* path, u32 mode)
+{
+    semihosting_open_params_t params =
+    {
+        path,
+        mode,
+        strlen(path)
+    };
+    return sh_callSemihostingFunction(SYS_OPEN, &params);
+}
+
+static inline int sh_readFile(int handle, void* buffer, u32 length)
+{
+    semihosting_read_params_t params =
+    {
+        handle,
+        buffer,
+        length
+    };
+    return sh_callSemihostingFunction(SYS_READ, &params);
+}
+
+static inline int sh_writeFile(int handle, const void* buffer, u32 length)
+{
+    semihosting_write_params_t params =
+    {
+        handle,
+        buffer,
+        length
+    };
+    return sh_callSemihostingFunction(SYS_WRITE, &params);
+}
+
+static inline int sh_seekFile(int handle, u32 position)
+{
+    semihosting_seek_params_t params =
+    {
+        handle,
+        position
+    };
+    return sh_callSemihostingFunction(SYS_SEEK, &params);
+}
+
+static inline int sh_closeFile(int handle)
+{
+    return sh_callSemihostingFunction(SYS_CLOSE, &handle);
+}
+
+static inline int sh_getFileSize(int handle)
+{
+    return sh_callSemihostingFunction(SYS_FLEN, &handle);
+}
+
+#ifdef __cplusplus
+}
+#endif