mirror of
https://github.com/TinyCC/tinycc.git
synced 2026-02-05 21:31:35 +00:00
8569427459
tcc.h, arm-gen.c, arm64-gen.c, i386-gen.c, riscv64-gen.c, x86_64-gen.c: - remove old code tccrun.c: - update to use lib/run_nostdlib.c Makefile, lib/Makefile, lib/run_nostdlib.c: - new code tests/nostdlib_test.c: - testcode
156 lines
3.3 KiB
C
Executable File
156 lines
3.3 KiB
C
Executable File
#!/usr/local/bin/tcc -run -nostdlib
|
|
|
|
// Not working on windows and apple because of different API.
|
|
|
|
#include <unistd.h>
|
|
#include <sys/syscall.h>
|
|
#if defined __x86_64__
|
|
__asm__ ("syscall:\n\t"
|
|
"mov %rdi,%rax\n\t"
|
|
"mov %rsi,%rdi\n\t"
|
|
"mov %rdx,%rsi\n\t"
|
|
"mov %rcx,%rdx\n\t"
|
|
"mov %r8,%r10\n\t"
|
|
"mov %r9,%r8\n\t"
|
|
"mov 0x8(%rsp),%r9\n\t"
|
|
"syscall\n\t"
|
|
"ret");
|
|
__asm__ (".global _start\n\t"
|
|
"_start:\n\t"
|
|
"mov 0(%rsp), %rdi\n\t"
|
|
"lea 8(%rsp), %rsi\n\t"
|
|
"jmp print");
|
|
#elif defined __i386__
|
|
__asm__ ("syscall:\n\t"
|
|
"push %ebp\n\t"
|
|
"push %edi\n\t"
|
|
"push %esi\n\t"
|
|
"push %ebx\n\t"
|
|
"mov 0x2c(%esp),%ebp\n\t"
|
|
"mov 0x28(%esp),%edi\n\t"
|
|
"mov 0x24(%esp),%esi\n\t"
|
|
"mov 0x20(%esp),%edx\n\t"
|
|
"mov 0x1c(%esp),%ecx\n\t"
|
|
"mov 0x18(%esp),%ebx\n\t"
|
|
"mov 0x14(%esp),%eax\n\t"
|
|
// "call *%gs:0x10\n\t"
|
|
".byte 0x65,0xff,0x15,0x10,0x00,0x00,0x00\n\t"
|
|
"pop %ebx\n\t"
|
|
"pop %esi\n\t"
|
|
"pop %edi\n\t"
|
|
"pop %ebp\n\t"
|
|
"ret");
|
|
__asm__ (".global _start\n\t"
|
|
"_start:\n\t"
|
|
"pop %esi\n\t"
|
|
"mov %esp, %ecx\n\t"
|
|
"and $0xfffffff0,%esp\n\t"
|
|
"push %ecx\n\t"
|
|
"push %esi\n\t"
|
|
"call print");
|
|
#elif defined __arm__
|
|
__asm__ ("syscall:\n\t"
|
|
"mov r12, sp\n\t"
|
|
"push {r4, r5, r6, r7}\n\t"
|
|
"mov r7, r0\n\t"
|
|
"mov r0, r1\n\t"
|
|
"mov r1, r2\n\t"
|
|
"mov r2, r3\n\t"
|
|
"ldm r12, {r3, r4, r5, r6}\n\t"
|
|
"svc 0x00000000\n\t"
|
|
"pop {r4, r5, r6, r7}\n\t"
|
|
"mov pc, lr");
|
|
__asm__ (".global _start\n\t"
|
|
"_start:\n\t"
|
|
"pop {r0}\n\t"
|
|
"mov r1, sp\n\t"
|
|
"bl print");
|
|
#elif defined __aarch64__
|
|
__asm__ ("syscall:\n\t"
|
|
".int 0x2a0003e8\n\t" // mov w8, w0
|
|
".int 0xaa0103e0\n\t" // x0, x1
|
|
".int 0xaa0203e1\n\t" // mov x1, x2
|
|
".int 0xaa0303e2\n\t" // mov x2, x3
|
|
".int 0xaa0403e3\n\t" // mov x3, x4
|
|
".int 0xaa0503e4\n\t" // mov x4, x5
|
|
".int 0xaa0603e5\n\t" // mov x5, x6
|
|
".int 0xaa0703e6\n\t" // mov x6, x7
|
|
".int 0xd4000001\n\t" // svc #0x0
|
|
".int 0xd65f03c0"); // ret
|
|
__asm__ (".global _start\n\t"
|
|
"_start:\n\t"
|
|
".int 0xf94003e0\n\t" // ldr x0, [sp]
|
|
".int 0x910023e1\n\t" // add x1, sp, #08
|
|
".reloc .,R_AARCH64_CALL26,print\n\t"
|
|
".int 0x94000000"); // bl print
|
|
#elif defined __riscv
|
|
__asm__ ("syscall:\n\t"
|
|
"mv t1,a0\n\t"
|
|
"mv a0,a1\n\t"
|
|
"mv a1,a2\n\t"
|
|
"mv a2,a3\n\t"
|
|
"mv a3,a4\n\t"
|
|
"mv a4,a5\n\t"
|
|
"mv a5,a6\n\t"
|
|
"mv a6,a7\n\t"
|
|
"mv a7,t1\n\t"
|
|
"ecall\n\t"
|
|
"ret");
|
|
__asm__ (".global _start\n\t"
|
|
"_start:\n\t"
|
|
"ld a0,0(sp)\n\t"
|
|
"addi a1,sp,8\n\t"
|
|
"jal print");
|
|
#endif
|
|
unsigned long strlen(const char *s)
|
|
{
|
|
unsigned long len = 0;
|
|
|
|
while (*s++)
|
|
len++;
|
|
return len;
|
|
}
|
|
|
|
static void pr_num(int num)
|
|
{
|
|
char val[20], *p = &val[20];
|
|
|
|
*--p = '\0';
|
|
do {
|
|
int a = num, b = 0;
|
|
|
|
while (a >= 10) {
|
|
a -= 10;
|
|
b++;
|
|
}
|
|
*--p = a + '0';
|
|
num = b;
|
|
} while (num);
|
|
syscall(SYS_write, 1, p, strlen(p));
|
|
}
|
|
|
|
static void pr_str(int n, char *s)
|
|
{
|
|
pr_num(n);
|
|
syscall(SYS_write, 1, ": ", 2);
|
|
syscall(SYS_write, 1, s, strlen(s));
|
|
syscall(SYS_write, 1, "\n", 1);
|
|
}
|
|
|
|
void print(int argc, char **argv) {
|
|
int i;
|
|
char **envp = &argv[argc + 1];
|
|
|
|
syscall(SYS_write, 1, "argc: ", 6);
|
|
pr_num(argc);
|
|
syscall(SYS_write, 1, "\n", 1);
|
|
syscall(SYS_write, 1, "argv[]\n", 7);
|
|
for (i = 0; i < argc; i++)
|
|
pr_str(i, argv[i]);
|
|
syscall(SYS_write, 1, "envp[]\n", 7);
|
|
i = 0;
|
|
while (*envp)
|
|
pr_str(i++, *envp++);
|
|
syscall(SYS_exit, 0);
|
|
}
|