Updated libc

apps/system/init/init.c

@@ -0,0 +1,81 @@
+#include "printf.h"
+
+#define AT_NULL 0
+#define AT_IGNORE 1
+#define AT_EXECFD 2
+#define AT_PHDR 3
+#define AT_PHENT 4
+#define AT_PHNUM 5
+#define AT_PAGESZ 6
+#define AT_BASE 7
+#define AT_FLAGS 8
+#define AT_ENTRY 9
+#define AT_NOTELF 10
+#define AT_UID 11
+#define AT_EUID 12
+#define AT_GID 13
+#define AT_EGID 14
+#define AT_PLATFORM 15
+#define AT_HWCAP 16
+#define AT_CLKTCK 17
+#define AT_SECURE 23
+#define AT_BASE_PLATFORM 24
+#define AT_RANDOM 25
+#define AT_HWCAP2 26
+#define AT_EXECFN 31
+#define AT_SYSINFO 32
+#define AT_SYSINFO_EHDR 33
+#define AT_L1I_CACHESHAPE 34
+#define AT_L1D_CACHESHAPE 35
+#define AT_L2_CACHESHAPE 36
+#define AT_L3_CACHESHAPE 37
+#define AT_L1I_CACHESIZE 40
+#define AT_L1I_CACHEGEOMETRY 41
+#define AT_L1D_CACHESIZE 42
+#define AT_L1D_CACHEGEOMETRY 43
+#define AT_L2_CACHESIZE 44
+#define AT_L2_CACHEGEOMETRY 45
+#define AT_L3_CACHESIZE 46
+#define AT_L3_CACHEGEOMETRY 47
+#define AT_MINSIGSTKSZ 51
+
+typedef struct
+{
+    unsigned long a_type;
+    union
+    {
+        unsigned long a_val;
+    } a_un;
+} Elf64_auxv_t;
+
+static inline long syscall2(int sc, long arg1, long arg2)
+{
+    long ret;
+    __asm__ __volatile__("syscall"
+                         : "=a"(ret)
+                         : "a"(sc), "D"(arg1), "S"(arg2)
+                         : "rcx", "r11", "memory");
+    return ret;
+}
+
+void putchar(char c) { syscall2(1, c, 0); }
+
+int main(int argc, char *argv[], char *envp[])
+{
+    printf_("Hello World!\n");
+    printf_("I have %d arguments\n", argc);
+    for (int i = 0; i < argc; i++)
+        printf_("argv[%d] = (%p) %s\n", i, argv[i], argv[i]);
+    for (int i = 0; envp[i]; i++)
+        printf_("envp[%d] = (%p) %s\n", i, envp[i], envp[i]);
+    Elf64_auxv_t *auxv;
+    while (*envp++ != NULL)
+        ;
+
+    int i = 0;
+    for (auxv = (Elf64_auxv_t *)envp; auxv->a_type != AT_NULL; auxv++)
+    {
+        printf_("%lu :%d\n", (auxv->a_type), i++);
+    }
+    return 0;
+}