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

platform_linux_amd64.c (1895B)
      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 #ifndef asm
     14 #ifdef __asm
     15 #define asm __asm
     16 #else
     17 #define asm __asm__
     18 #endif
     19 #endif
     20 
     21 #define SYS_read       0
     22 #define SYS_write      1
     23 #define SYS_open       2
     24 #define SYS_close      3
     25 #define SYS_stat       4
     26 #define SYS_mmap       9
     27 #define SYS_exit       60
     28 #define SYS_getdents64 217
     29 
     30 #define PAGESIZE 4096
     31 
     32 #define STAT_BUF_SIZE 144
     33 #define STAT_SIZE_OFF 48
     34 
     35 #define DIRENT_RECLEN_OFF 16
     36 #define DIRENT_TYPE_OFF   18
     37 #define DIRENT_NAME_OFF   19
     38 
     39 #include "platform_linux.c"
     40 
     41 static i64
     42 syscall1(i64 n, i64 a1)
     43 {
     44 	i64 result;
     45 	asm volatile ("syscall"
     46 		: "=a"(result)
     47 		: "a"(n), "D"(a1)
     48 		: "rcx", "r11", "memory"
     49 	);
     50 	return result;
     51 }
     52 
     53 static i64
     54 syscall2(i64 n, i64 a1, i64 a2)
     55 {
     56 	i64 result;
     57 	asm volatile ("syscall"
     58 		: "=a"(result)
     59 		: "a"(n), "D"(a1), "S"(a2)
     60 		: "rcx", "r11", "memory"
     61 	);
     62 	return result;
     63 }
     64 
     65 static i64
     66 syscall3(i64 n, i64 a1, i64 a2, i64 a3)
     67 {
     68 	i64 result;
     69 	asm volatile ("syscall"
     70 		: "=a"(result)
     71 		: "a"(n), "D"(a1), "S"(a2), "d"(a3)
     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 );