platform_linux_amd64.c (1612B)
1 /* See LICENSE for license details. */ 2 3 #ifndef asm 4 #ifdef __asm 5 #define asm __asm 6 #else 7 #define asm __asm__ 8 #endif 9 #endif 10 11 #define SYS_read 0 12 #define SYS_write 1 13 #define SYS_open 2 14 #define SYS_close 3 15 #define SYS_stat 4 16 #define SYS_mmap 9 17 #define SYS_exit 60 18 #define SYS_getdents64 217 19 20 #define PAGESIZE 4096 21 22 #define STAT_BUF_SIZE 144 23 #define STAT_SIZE_OFF 48 24 25 #define DIRENT_RECLEN_OFF 16 26 #define DIRENT_TYPE_OFF 18 27 #define DIRENT_NAME_OFF 19 28 29 #include "platform_linux.c" 30 31 static i64 32 syscall1(i64 n, i64 a1) 33 { 34 i64 result; 35 asm volatile ("syscall" 36 : "=a"(result) 37 : "a"(n), "D"(a1) 38 : "rcx", "r11", "memory" 39 ); 40 return result; 41 } 42 43 static i64 44 syscall2(i64 n, i64 a1, i64 a2) 45 { 46 i64 result; 47 asm volatile ("syscall" 48 : "=a"(result) 49 : "a"(n), "D"(a1), "S"(a2) 50 : "rcx", "r11", "memory" 51 ); 52 return result; 53 } 54 55 static i64 56 syscall3(i64 n, i64 a1, i64 a2, i64 a3) 57 { 58 i64 result; 59 asm volatile ("syscall" 60 : "=a"(result) 61 : "a"(n), "D"(a1), "S"(a2), "d"(a3) 62 : "rcx", "r11", "memory" 63 ); 64 return result; 65 } 66 67 static i64 68 syscall6(i64 n, i64 a1, i64 a2, i64 a3, i64 a4, i64 a5, i64 a6) 69 { 70 i64 result; 71 register i64 r10 asm("r10") = a4; 72 register i64 r8 asm("r8") = a5; 73 register i64 r9 asm("r9") = a6; 74 asm volatile ("syscall" 75 : "=a"(result) 76 : "a"(n), "D"(a1), "S"(a2), "d"(a3), "r"(r10), "r"(r8), "r"(r9) 77 : "rcx", "r11", "memory" 78 ); 79 return result; 80 } 81 82 asm ( 83 ".intel_syntax noprefix\n" 84 ".global _start\n" 85 "_start:\n" 86 " mov edi, DWORD PTR [rsp]\n" 87 " lea rsi, [rsp+8]\n" 88 " lea rdx, [rsi+rdi*8+8]\n" 89 " call linux_main\n" 90 " ud2\n" 91 ".att_syntax\n" 92 );