Fix for Bug 3671 - QEMU GDB stub listens on IPv6-only port on Windows 7
The connection string used by the GDB stub does not specify which
version of the Internet Protocol should be used by the port on
which it listens. On host platforms with IPv6 support, such as
Windows 7, this means that the stub listens on an IPv6-only port.
Since the GDB client uses IPv4, this means that the client cannot
connect to QEMU.
/*
* MIPS o32 Linux syscall example
*
* http://www.linux-mips.org/wiki/RISC/os
* http://www.linux-mips.org/wiki/MIPSABIHistory
* http://www.linux.com/howtos/Assembly-HOWTO/mips.shtml
*
* mipsel-linux-gcc -nostdlib -mno-abicalls -fno-PIC -mabi=32 \
* -O2 -static -o hello-mips hello-mips.c
*
*/
#define __NR_SYSCALL_BASE 4000
#define __NR_exit (__NR_SYSCALL_BASE+ 1)
#define __NR_write (__NR_SYSCALL_BASE+ 4)
static inline void exit1(int status)
{
register unsigned long __a0 asm("$4") = (unsigned long) status;
__asm__ __volatile__ (
" .set push \n"
" .set noreorder \n"
" li $2, %0 \n"
" syscall \n"
" .set pop "
:
: "i" (__NR_exit), "r" (__a0)
: "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
"memory");
}
static inline int write(int fd, const char *buf, int len)
{
register unsigned long __a0 asm("$4") = (unsigned long) fd;
register unsigned long __a1 asm("$5") = (unsigned long) buf;
register unsigned long __a2 asm("$6") = (unsigned long) len;
register unsigned long __a3 asm("$7");
unsigned long __v0;
__asm__ __volatile__ (
" .set push \n"
" .set noreorder \n"
" li $2, %2 \n"
" syscall \n"
" move %0, $2 \n"
" .set pop "
: "=r" (__v0), "=r" (__a3)
: "i" (__NR_write), "r" (__a0), "r" (__a1), "r" (__a2)
: "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
"memory");
/* if (__a3 == 0) */
return (int) __v0;
/*
errno = __v0;
return -1;
*/
}
void __start(void)
{
write (1, "Hello, World!\n", 14);
exit1 (42);
}