bsp/qemu-riscv-virt64/: avoid link libc

Author: jaypiper

.gitignore

@@ -38,3 +38,5 @@ tags
 .idea
 CMakeLists.txt
 cmake-build-debug
+
+.vscode

bsp/qemu-riscv-virt64/applications/main.c

@@ -15,7 +15,7 @@
 
 int main(void)
 {
-    printf("Hello RISC-V!\n");
+    rt_kprintf("Hello RISC-V!\n");
 
     return 0;
 }

bsp/qemu-riscv-virt64/driver/lib/SConscript

@@ -0,0 +1,14 @@
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c')
+CPPPATH = [cwd]
+
+if GetDepend('USING_RV64_LINUX_GNU_TOOLCHAIN'):
+    group = DefineGroup('Drivers', src, depend = [''], CPPPATH = CPPPATH)
+else:
+    group = []
+
+objs = [group]
+
+Return('objs')

bsp/qemu-riscv-virt64/driver/lib/stdio.c

@@ -0,0 +1,18 @@
+#include <rthw.h>
+#include <rtconfig.h>
+
+#ifdef USING_RV64_LINUX_GNU_TOOLCHAIN
+
+int vsprintf(char *out, const char *fmt, va_list ap) {
+  rt_vsprintf(out, fmt, ap);
+}
+
+int sprintf(char *out, const char *fmt, ...) {
+  va_list args;
+  va_start(args, fmt);
+  vsprintf(out, fmt, args);
+  return 0;
+}
+
+
+#endif

bsp/qemu-riscv-virt64/driver/lib/stdlib.c

@@ -0,0 +1,16 @@
+#include <rthw.h>
+#include <rtconfig.h>
+
+#ifdef USING_RV64_LINUX_GNU_TOOLCHAIN
+
+int atoi(const char* nptr) {
+  int x = 0;
+  while (*nptr == ' ') { nptr ++; }
+  while (*nptr >= '0' && *nptr <= '9') {
+    x = x * 10 + *nptr - '0';
+    nptr ++;
+  }
+  return x;
+}
+
+#endif

bsp/qemu-riscv-virt64/driver/lib/string.c

@@ -0,0 +1,69 @@
+#include <rthw.h>
+#include "../../rtconfig.h"
+
+#ifdef USING_RV64_LINUX_GNU_TOOLCHAIN
+
+size_t strlen(const char *s) {
+  return rt_strlen(s);
+}
+
+char *strcpy(char* dst, const char* src) {
+  char *p1 = dst;
+  const char *p2 = src;
+  for( ; *p2 != 0; p1++, p2++) *p1 = *p2;
+  *p1 = 0;
+  return dst;
+}
+
+char* strncpy(char* dst, const char* src, size_t n) {
+  return rt_strncpy(dst, src, n);
+}
+
+char* strcat(char* dst, const char* src) {
+  size_t len = rt_strlen(dst);
+  strcpy(dst + len, src);
+  return dst;
+}
+
+int strcmp(const char* s1, const char* s2) {
+  return rt_strcmp(s1, s2);
+}
+
+int strncmp(const char* s1, const char* s2, size_t n) {
+  return rt_strncmp(s1, s2, n);
+}
+
+void* memset(void* v,int c,size_t n) {
+  return rt_memset(v, c, n);
+}
+
+void* memmove(void* dst, const void* src,size_t n) {
+  return rt_memmove(dst, src, n);
+}
+
+void* memcpy(void* out, const void* in, size_t n) {
+  rt_memcpy(out, in, n);
+}
+
+int memcmp(const void* s1, const void* s2, size_t n) {
+  return rt_memcmp(s1, s2, n);
+}
+
+const char* strstr(const char* s1, const char* s2){
+    return rt_strstr(s1, s2);
+}
+
+char *strrchr(const char *s, int c)
+{
+    if(s == RT_NULL) return RT_NULL;
+    char *p_char = RT_NULL;
+    while(*s != '\0')
+    {
+        if(*s == (char)c) p_char = (char *)s;
+        s++;
+    }
+    return p_char;
+}
+
+
+#endif

bsp/qemu-riscv-virt64/rtconfig.py

@@ -32,16 +32,16 @@
     CXX     = PREFIX + 'g++'
     AS      = PREFIX + 'gcc'
     AR      = PREFIX + 'ar'
-    LINK    = PREFIX + 'gcc'
+    LINK    = PREFIX + 'ld'
     TARGET_EXT = 'elf'
     SIZE    = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY  = PREFIX + 'objcopy'
 
-    DEVICE  = ' -mcmodel=medany -march=rv64imafdc -mabi=lp64d'
+    DEVICE  = ' -fno-pic -mcmodel=medany -march=rv64imafd -mabi=lp64d'
     CFLAGS  = DEVICE + ' -fvar-tracking -ffreestanding -fno-common -ffunction-sections -fdata-sections -fstrict-volatile-bitfields '
     AFLAGS  = ' -c' + DEVICE + ' -x assembler-with-cpp'
-    LFLAGS  = DEVICE + ' -nostartfiles -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,_start -T link.lds -lc -lm '
+    LFLAGS  = ' --gc-sections -Map=rtthread.map -cref -u _start -T link.lds '
     CPATH   = ''
     LPATH   = ''