cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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hello-mips.c (1699B)

      1/*
      2* MIPS o32 Linux syscall example
      3*
      4* http://www.linux-mips.org/wiki/RISC/os
      5* http://www.linux-mips.org/wiki/MIPSABIHistory
      6* http://www.linux.com/howtos/Assembly-HOWTO/mips.shtml
      7*
      8* mipsel-linux-gcc -nostdlib -mno-abicalls -fno-PIC -mabi=32 \
      9*                  -O2 -static -o hello-mips hello-mips.c
     10*
     11*/
     12#define __NR_SYSCALL_BASE	4000
     13#define __NR_exit			(__NR_SYSCALL_BASE+  1)
     14#define __NR_write			(__NR_SYSCALL_BASE+  4)
     15
     16static inline void exit1(int status)
     17{
     18    register unsigned long __a0 asm("$4") = (unsigned long) status;
     19
     20    __asm__ __volatile__ (
     21        "	.set push	\n"
     22        "	.set noreorder	\n"
     23        "	li	$2, %0	\n"
     24        "	syscall		\n"
     25        "	.set pop	"
     26        :
     27        : "i" (__NR_exit), "r" (__a0)
     28        : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
     29          "memory");
     30}
     31
     32static inline int write(int fd, const char *buf, int len)
     33{
     34    register unsigned long __a0 asm("$4") = (unsigned long) fd;
     35    register unsigned long __a1 asm("$5") = (unsigned long) buf;
     36    register unsigned long __a2 asm("$6") = (unsigned long) len;
     37    register unsigned long __a3 asm("$7");
     38    unsigned long __v0;
     39
     40    __asm__ __volatile__ (
     41        "	.set push	\n"
     42        "	.set noreorder	\n"
     43        "	li	$2, %2	\n"
     44        "	syscall		\n"
     45        "	move	%0, $2	\n"
     46        "	.set pop	"
     47        : "=r" (__v0), "=r" (__a3)
     48        : "i" (__NR_write), "r" (__a0), "r" (__a1), "r" (__a2)
     49        : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
     50          "memory");
     51
     52/*    if (__a3 == 0) */
     53        return (int) __v0;
     54/*
     55    errno = __v0;
     56    return -1;
     57 */
     58}
     59
     60void __start(void)
     61{
     62    write (1, "Hello, World!\n", 14);
     63    exit1(0);
     64}