symbian-qemu-0.9.1-12/qemu-symbian-svp/tests/hello-mips.c
author cdavies@GUAR
Tue, 26 Jan 2010 13:03:40 +0000
branchphonesim-integ
changeset 36 a587897e3bb2
parent 1 2fb8b9db1c86
permissions -rw-r--r--
start phonesim-integ
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/*
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* MIPS o32 Linux syscall example
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*
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* http://www.linux-mips.org/wiki/RISC/os
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* http://www.linux-mips.org/wiki/MIPSABIHistory
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* http://www.linux.com/howtos/Assembly-HOWTO/mips.shtml
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*
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* mipsel-linux-gcc -nostdlib -mno-abicalls -fno-PIC -mabi=32 \
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*                  -O2 -static -o hello-mips hello-mips.c
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*
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*/
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#define __NR_SYSCALL_BASE	4000
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#define __NR_exit			(__NR_SYSCALL_BASE+  1)
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#define __NR_write			(__NR_SYSCALL_BASE+  4)
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static inline void exit1(int status)
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{
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    register unsigned long __a0 asm("$4") = (unsigned long) status;
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    __asm__ __volatile__ (
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        "	.set push	\n"
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        "	.set noreorder	\n"
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        "	li	$2, %0	\n"
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        "	syscall		\n"
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        "	.set pop	"
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        :
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	: "i" (__NR_exit), "r" (__a0)
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	: "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
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	  "memory");
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}
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static inline int write(int fd, const char *buf, int len)
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{
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    register unsigned long __a0 asm("$4") = (unsigned long) fd;
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    register unsigned long __a1 asm("$5") = (unsigned long) buf;
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    register unsigned long __a2 asm("$6") = (unsigned long) len;
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    register unsigned long __a3 asm("$7");
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    unsigned long __v0;
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    __asm__ __volatile__ (
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        "	.set push	\n"
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        "	.set noreorder	\n"
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        "	li	$2, %2	\n"
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        "	syscall		\n"
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        "	move	%0, $2	\n"
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        "	.set pop	"
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        : "=r" (__v0), "=r" (__a3)
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        : "i" (__NR_write), "r" (__a0), "r" (__a1), "r" (__a2)
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	: "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
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	  "memory");
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/*    if (__a3 == 0) */
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        return (int) __v0;
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/*
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    errno = __v0;
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    return -1;
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 */
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}
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void __start(void)
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{
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    write (1, "Hello, World!\n", 14);
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    exit1 (42);
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}