Piotr Jasiukajtis wrote:
> Hi,
>
> Simple code:
>
> $ cat simple_64bit_syscall.s
> .text
> .globl main
> main:
>
> xorq %rax, %rax
> xorq %rdi, %rdi
> xorq %rsi, %rsi
> xorq %rdx, %rdx
> xorq %rcx, %rcx
> xorq %r8, %r8
> xorq %r9, %r9
> movq $1, %rax
> int $0x91
>
>
> $ as -xarch=amd64 simple_64bit_syscall.s -o simple_64bit_syscall.o && ld
> simple_64bit_syscall.o -o simple_64bit_syscall
>
> $ truss ./simple_64bit_syscall
> execve("simple_64bit_syscall", 0xFFFFFD7FFFDFFD08, 0xFFFFFD7FFFDFFD18)
> argc = 1
> mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC,
> MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFD7FFF3A0000
> resolvepath("/usr/lib/amd64/ld.so.1", "/lib/amd64/ld.so.1", 1023) = 18
> getcwd("/home/estibi", 1002) = 0
> resolvepath("/home/estibi/simple_64bit_syscall",
> "/home/estibi/simple_64bit_syscall", 1023) = 33
> stat("/home/estibi/simple_64bit_syscall", 0xFFFFFD7FFFDFF910) = 0
> open("/var/ld/64/ld.config", O_RDONLY) Err#2 ENOENT
> _exit(-2753074036736)
>
>
> Why the function argument is '-2753074036736' instaad of 1?
Instead of '0'
--
Regards,
Piotr Jasiukajtis | estibi | SCA OS0072
http://estseg.blogspot.com
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