platform_linux_amd64.c - jdict - command line tool for looking up terms in yomidict dictionaries

platform_linux_amd64.c (1953B)
      1 /* See LICENSE for license details. */
      2 typedef unsigned char  u8;
      3 typedef signed   long  i64;
      4 typedef unsigned long  u64;
      5 typedef signed   int   i32;
      6 typedef unsigned int   u32;
      7 typedef unsigned int   b32;
      8 typedef unsigned short u16;
      9 typedef signed   long  size;
     10 typedef unsigned long  usize;
     11 typedef signed   long  iptr;
     12 
     13 #define SYS_read       0
     14 #define SYS_write      1
     15 #define SYS_close      3
     16 #define SYS_fstat      5
     17 #define SYS_mmap       9
     18 #define SYS_exit       60
     19 #define SYS_getdents64 217
     20 #define SYS_openat     257
     21 
     22 #define PAGESIZE 4096
     23 
     24 #define O_DIRECTORY   0x10000
     25 
     26 #include "platform_linux.c"
     27 
     28 static i64
     29 syscall1(i64 n, i64 a1)
     30 {
     31 	i64 result;
     32 	asm volatile ("syscall"
     33 		: "=a"(result)
     34 		: "a"(n), "D"(a1)
     35 		: "rcx", "r11", "memory"
     36 	);
     37 	return result;
     38 }
     39 
     40 static i64
     41 syscall2(i64 n, i64 a1, i64 a2)
     42 {
     43 	i64 result;
     44 	asm volatile ("syscall"
     45 		: "=a"(result)
     46 		: "a"(n), "D"(a1), "S"(a2)
     47 		: "rcx", "r11", "memory"
     48 	);
     49 	return result;
     50 }
     51 
     52 static i64
     53 syscall3(i64 n, i64 a1, i64 a2, i64 a3)
     54 {
     55 	i64 result;
     56 	asm volatile ("syscall"
     57 		: "=a"(result)
     58 		: "a"(n), "D"(a1), "S"(a2), "d"(a3)
     59 		: "rcx", "r11", "memory"
     60 	);
     61 	return result;
     62 }
     63 
     64 static i64
     65 syscall4(i64 n, i64 a1, i64 a2, i64 a3, i64 a4)
     66 {
     67 	i64 result;
     68 	register i64 r10 asm("r10") = a4;
     69 	asm volatile ("syscall"
     70 		: "=a"(result)
     71 		: "a"(n), "D"(a1), "S"(a2), "d"(a3), "r"(r10)
     72 		: "rcx", "r11", "memory"
     73 	);
     74 	return result;
     75 }
     76 
     77 static i64
     78 syscall6(i64 n, i64 a1, i64 a2, i64 a3, i64 a4, i64 a5, i64 a6)
     79 {
     80 	i64 result;
     81 	register i64 r10 asm("r10") = a4;
     82 	register i64 r8  asm("r8")  = a5;
     83 	register i64 r9  asm("r9")  = a6;
     84 	asm volatile ("syscall"
     85 		: "=a"(result)
     86 		: "a"(n), "D"(a1), "S"(a2), "d"(a3), "r"(r10), "r"(r8), "r"(r9)
     87 		: "rcx", "r11", "memory"
     88 	);
     89 	return result;
     90 }
     91 
     92 asm (
     93 	".intel_syntax noprefix\n"
     94 	".global _start\n"
     95 	"_start:\n"
     96 	"	mov	edi, DWORD PTR [rsp]\n"
     97 	"	lea	rsi, [rsp+8]\n"
     98 	"	lea	rdx, [rsi+rdi*8+8]\n"
     99 	"	call	linux_main\n"
    100 	"	ud2\n"
    101 	".att_syntax\n"
    102 );