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sprintf working! (but not snprintf ...)

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This commit is contained in:
pommicket 2022-02-13 22:12:44 -05:00
parent 2fef698195
commit b9fd2a2b9c
7 changed files with 1724 additions and 65 deletions
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66
05/stdc_common.h Normal file
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@ -0,0 +1,66 @@
#ifndef _STDC_COMMON_H
#define _STDC_COMMON_H
#define signed
#define volatile
#define register
#define const
typedef unsigned char uint8_t;
typedef char int8_t;
typedef unsigned short uint16_t;
typedef short int16_t;
typedef unsigned int uint32_t;
typedef int int32_t;
typedef unsigned long uint64_t;
typedef long int64_t;
typedef unsigned long size_t;
typedef long ptrdiff_t;
typedef unsigned long uintptr_t;
typedef long intptr_t;
static unsigned char __syscall_data[] = {
// mov rax, [rsp+24]
0x48, 0x8b, 0x84, 0x24, 24, 0, 0, 0,
// mov rdi, rax
0x48, 0x89, 0xc7,
// mov rax, [rsp+32]
0x48, 0x8b, 0x84, 0x24, 32, 0, 0, 0,
// mov rsi, rax
0x48, 0x89, 0xc6,
// mov rax, [rsp+40]
0x48, 0x8b, 0x84, 0x24, 40, 0, 0, 0,
// mov rdx, rax
0x48, 0x89, 0xc2,
// mov rax, [rsp+48]
0x48, 0x8b, 0x84, 0x24, 48, 0, 0, 0,
// mov r10, rax
0x49, 0x89, 0xc2,
// mov rax, [rsp+56]
0x48, 0x8b, 0x84, 0x24, 56, 0, 0, 0,
// mov r8, rax
0x49, 0x89, 0xc0,
// mov rax, [rsp+64]
0x48, 0x8b, 0x84, 0x24, 64, 0, 0, 0,
// mov r9, rax
0x49, 0x89, 0xc1,
// mov rax, [rsp+16]
0x48, 0x8b, 0x84, 0x24, 16, 0, 0, 0,
// syscall
0x0f, 0x05,
// mov [rsp+8], rax
0x48, 0x89, 0x84, 0x24, 8, 0, 0, 0,
// ret
0xc3
};
#define __syscall(no, arg1, arg2, arg3, arg4, arg5, arg6)\
(((unsigned long (*)(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long))__syscall_data)\
(no, arg1, arg2, arg3, arg4, arg5, arg6))
long write(int fd, void *buf, size_t count) {
__syscall(1, fd, buf, count, 0, 0, 0);
}
#endif // _STDC_COMMON_H