Adding semihosting support for bmsp

libwrap/CMakeLists.txt

@@ -27,6 +27,7 @@ SET(LIBWRAP_SRCS
     ${LIBWRAP_DIR}/sys/_exit.c
     ${LIBWRAP_DIR}/misc/write_hex.c
     ${LIBWRAP_DIR}/sys/printf.c
+    ${LIBWRAP_DIR}/sys/puts.c
 )
 IF(${SEMIHOSTING})
     SET(LIBWRAP_SRCS ${LIBWRAP_SRCS} ${LIBWRAP_DIR}/semihosting/semihosting.c ${LIBWRAP_DIR}/semihosting/trap.c)
@@ -49,6 +50,6 @@ FOREACH(SYM ${LIBWRAP_SYMS})
     LIST(APPEND WRAP_LDFLAGS "-Wl,--wrap=${SYM}")
 ENDFOREACH()
 
-SET(LIBWRAP_TGC_LDFLAGS ${WRAP_LDFLAGS} "-Wl,--start-group" "-Wl,--end-group")
+SET(LIBWRAP_TGC_LDFLAGS ${WRAP_LDFLAGS} "-Wl,--start-group" "-Wl,--end-group" "-L. -lLIBWRAP_TGC")
 
 ENDIF(NOT DEFINED _MK_LIBWRAP)

libwrap/semihosting/semihosting.c

@@ -1,6 +1,7 @@
 #include <stdint.h>
 #include <stdarg.h>
 #include <stddef.h>
+#include <string.h>
 
 #include "semihosting.h"
 
@@ -25,12 +26,31 @@
 #define SEMIHOSTING_SYS_GET_CMDLINE     0x15
 #define SEMIHOSTING_SYS_HEAPINFO        0x16
 #define SEMIHOSTING_EnterSVC            0x17
-#define SEMIHOSTING_ReportException     0x18
+#define SEMIHOSTING_SYS_EXIT            0x18                
+#define SEMIHOSTING_SYS_EXIT_EXTENDED   0x20
 #define SEMIHOSTING_SYS_ELAPSED         0x30
 #define SEMIHOSTING_SYS_TICKFREQ        0x31
 
 #define RISCV_SEMIHOSTING_CALL_NUMBER 7
 
+/*typedef struct {
+    char* str;
+    int mode;
+    size_t length;
+} OpenVector;
+
+typedef struct {
+    char* old;
+    int old_len;
+    char* new;
+    int new_len;
+} RenameVector;
+
+typedef struct {
+    char* path;
+    int len;
+} RemoveVector;
+*/
 
 static inline int __attribute__ ((always_inline)) call_host(int reason, void* arg) {
 #if 1
@@ -66,6 +86,71 @@ static inline int __attribute__ ((always_inline)) call_host(int reason, void* ar
 #endif    
 }
 
+/*
+int sh_errno(void) {
+    return call_host(SEMIHOSTING_SYS_ERRNO, (void*)NULL);
+}
+
+int sh_time(void) {
+    return call_host(SEMIHOSTING_SYS_TIME, (void*)NULL);
+} 
+
+void sh_seek(int file_handle, int pos) {
+    int vec[2] = {file_handle, pos};
+    call_host(SEMIHOSTING_SYS_SEEK, &vec);
+    return;
+}
+
+void sh_write(char* str, int file_handle) {
+    size_t length = strlen(str);
+    OpenVector vec = {str, file_handle, length};
+    call_host(SEMIHOSTING_SYS_WRITE, &vec);
+    return;
+}
+
+int sh_close(int file_handle) {
+    return call_host(SEMIHOSTING_SYS_CLOSE, file_handle);
+}
+
+void sh_exit(void) {
+    call_host(SEMIHOSTING_SYS_EXIT, (void*)NULL);
+    return;
+}
+
+void sh_exit_extended(void) {
+    call_host(SEMIHOSTING_SYS_EXIT_EXTENDED, (void*)NULL);
+    return;
+}
+
+int sh_flen(int file_handle) {
+    return call_host(SEMIHOSTING_SYS_FLEN, file_handle);
+
+}
+
+int sh_iserror(int num) {
+    return call_host(SEMIHOSTING_SYS_ISERROR, num);
+
+}
+
+int sh_istty(int file_handle) {
+    return call_host(SEMIHOSTING_SYS_ISTTY, file_handle);
+}
+
+int sh_remove(char* path) {
+    int len = strlen(path);
+    RemoveVector vec = {path, len};
+    return call_host(SEMIHOSTING_SYS_REMOVE, &vec);
+
+}
+
+void sh_rename(char* old, char* new) {
+    int old_len = strlen(old);
+    int new_len = strlen(new);
+    RenameVector vec = {old, old_len, new, new_len};
+    call_host(SEMIHOSTING_SYS_RENAME, &vec);
+    return;
+}
+
 void sh_write0(const char* buf)
 {
     // Print zero-terminated string
@@ -82,9 +167,26 @@ char sh_readc(void)
 {
     // Read character from keyboard. (Blocking operation!)
     char c = call_host(SEMIHOSTING_SYS_READC, (void*)NULL);
-
-    if (sh_missing_host)
-        return 0;
-    else
     return c;
 }
+
+int sh_open(char* str, int mode) {
+    //mode = 0;
+    //int length = 44;
+    size_t length = strlen(str);
+    OpenVector vec = {str, mode, length};
+    int i = call_host(SEMIHOSTING_SYS_OPEN, &vec);
+    return i;
+}
+
+void sh_read(char* buf, int file_handle, size_t length) {
+    OpenVector vec = {buf, file_handle, length};
+    int i = call_host(SEMIHOSTING_SYS_READ, &vec);
+    return i;
+} */
+
+int sh_clock(void)
+{
+    int clock = call_host(SEMIHOSTING_SYS_CLOCK, (void*)NULL);
+    return clock;
+}

libwrap/semihosting/semihosting.h

@@ -6,6 +6,20 @@
 void sh_write0(const char* buf);
 void sh_writec(char c);
 char sh_readc(void);
+int sh_clock(void);
+void sh_read(char*, int, size_t);
+void sh_write(char*, int);
+int sh_open(char*, int);
+void sh_rename(char*, char*);
+int sh_remove(char*);
+int sh_istty(int);
+int sh_iserror(int);
+int sh_flen(int);
+void sh_exit(void);
+void sh_exit_extended(void);
+int sh_close(int);
+int sh_time(void);
+int sh_errno(void);
 
 int getchar(void);
 

libwrap/semihosting/trap.c

@@ -13,7 +13,7 @@
 int sh_missing_host = 0;
 
 void trap()
-{
+{   //ToDo: Check why macro CSR_MEPC and others are not resolved
     uint32_t mepc   = read_csr(0x341);       // Address of trap
     uint32_t mtval  = read_csr(0x343);      // Instruction value of trap
     uint32_t mcause = read_csr(0x342);     // Reason for the trap

libwrap/sys/_exit.c

@@ -3,6 +3,7 @@
 #include <unistd.h>
 #include "platform.h"
 #include "weak_under_alias.h"
+#include "semihosting.h"
 
 #if defined(BOARD_hifive1)
 static volatile uint32_t tohost;
@@ -16,6 +17,10 @@ void write_hex(int fd, uint32_t hex);
 
 void __wrap_exit(int code)
 {
+#if defined(SEMIHOSTING)
+  sh_exit();
+  return;
+#endif
 //volatile uint32_t* leds = (uint32_t*) (GPIO_BASE_ADDR + GPIO_OUT_OFFSET);
   const char message[] = "\nProgam has exited with code:";
 //*leds = (~(code));

libwrap/sys/close.c

@@ -3,9 +3,14 @@
 #include <errno.h>
 #include "stub.h"
 #include "weak_under_alias.h"
+#include "semihosting.h"
 
 int __wrap_close(int fd)
 {
+#if defined(SEMIHOTING)
+  int i = sh_close(fd);
+  return i;
+#endif
   return _stub(EBADF);
 }
 

libwrap/sys/isatty.c

@@ -2,9 +2,14 @@
 
 #include <unistd.h>
 #include "weak_under_alias.h"
+#include "semihosting.h"
 
 int __wrap_isatty(int fd)
 {
+#if defined(SEMIHOSTING)
+  int i = sh_istty(fd);
+  return i;
+#endif
   if (fd == STDOUT_FILENO || fd == STDERR_FILENO)
     return 1;
 

libwrap/sys/lseek.c

@@ -5,9 +5,16 @@
 #include <sys/types.h>
 #include "stub.h"
 #include "weak_under_alias.h"
+#include "semihosting.h"
 
 off_t __wrap_lseek(int fd, off_t ptr, int dir)
 {
+#if defined(SEMIHOSTING)
+  if(sh_istty(fd))
+    return 0;
+  sh_seek();
+  return ptr;
+#endif
   if (isatty(fd))
     return 0;
 

libwrap/sys/open.c

@@ -3,9 +3,14 @@
 #include <errno.h>
 #include "stub.h"
 #include "weak_under_alias.h"
+#include "semihosting.h"
 
 int __wrap_open(const char* name, int flags, int mode)
 {
+#if defined(SEMIHOSTING)
+  int fd = sh_open(name, mode);
+  return fd;
+#endif
   return _stub(ENOENT);
 }
 weak_under_alias(open);

libwrap/sys/printf.c

@@ -7,6 +7,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <unistd.h>
+#include "semihosting.h"
 
 #undef putchar
 int putchar(int ch)
@@ -114,7 +115,11 @@ static void vprintfmt(void (*putch)(int, void**), void **putdat, const char *fmt
       if (ch == '\0')
         return;
       fmt++;
+#if defined(SEMIHOSTING)
+      sh_writec(ch);
+#else
       putch(ch, putdat);
+#endif
     }
     fmt++;
 

libwrap/sys/puts.c

@@ -8,9 +8,14 @@
 #include "platform.h"
 #include "stub.h"
 #include "weak_under_alias.h"
+#include "semihosting.h"
 
 int __wrap_puts(const char *s)
 {
+#if defined(SEMIHOSTING)
+  sh_write0(s);
+  return 0;
+#endif
   while (*s != '\0') {
 #if defined(BOARD_ehrenberg)
     while (uart_get_tx_free(uart)==0) ;

libwrap/sys/read.c

@@ -10,10 +10,15 @@
 #include "platform.h"
 #include "stub.h"
 #include "weak_under_alias.h"
+#include "semihosting.h"
 
 ssize_t __wrap_read(int fd, void* ptr, size_t len)
 {
     uint8_t * current = (uint8_t *)ptr;
+#if defined(SEMIHOSTING)
+    sh_read(current, fd, len);
+    return;
+#endif
 #if defined(BOARD_hifive1)
     volatile uint32_t * uart_rx = (uint32_t *)(UART0_CTRL_ADDR + UART_REG_RXFIFO);
     volatile uint8_t * uart_rx_cnt = (uint8_t *)(UART0_CTRL_ADDR + UART_REG_RXCTRL + 2);

libwrap/sys/unlink.c

@@ -3,9 +3,13 @@
 #include <errno.h>
 #include "stub.h"
 #include "weak_under_alias.h"
+#include "semihosting.h"
 
 int __wrap_unlink(const char* name)
 {
+#if defined(SEMIHOSTING)
+  return sh_remove(name);
+#endif
   return _stub(ENOENT);
 }
 weak_under_alias(unlink);

libwrap/sys/write.c

@@ -8,10 +8,15 @@
 #include "platform.h"
 #include "stub.h"
 #include "weak_under_alias.h"
+#include "semihosting.h"
 
 ssize_t __wrap_write(int fd, const void* ptr, size_t len)
 {
     const uint8_t * current = (const uint8_t *)ptr;
+#if defined(SEMIHOSTING)
+    sh_write(current, fd);
+    return len;
+#endif
     if (isatty(fd)) {
         for (size_t jj = 0; jj < len; jj++) {
 #if defined(BOARD_ehrenberg)