use glibc syscall (David Woodhouse)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1966 c046a42c-6fe2-441c-8c8c-71466251a162
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@ -79,127 +79,59 @@
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#define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct dirent [2])
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#if defined(__powerpc__)
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#undef __syscall_nr
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#undef __sc_loadargs_0
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#undef __sc_loadargs_1
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#undef __sc_loadargs_2
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#undef __sc_loadargs_3
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#undef __sc_loadargs_4
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#undef __sc_loadargs_5
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#undef __sc_asm_input_0
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#undef __sc_asm_input_1
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#undef __sc_asm_input_2
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#undef __sc_asm_input_3
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#undef __sc_asm_input_4
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#undef __sc_asm_input_5
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#undef _syscall0
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#undef _syscall1
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#undef _syscall2
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#undef _syscall3
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#undef _syscall4
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#undef _syscall5
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/* need to redefine syscalls as Linux kernel defines are incorrect for
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the clobber list */
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/* On powerpc a system call basically clobbers the same registers like a
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* function call, with the exception of LR (which is needed for the
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* "sc; bnslr" sequence) and CR (where only CR0.SO is clobbered to signal
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* an error return status).
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*/
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#define __syscall_nr(nr, type, name, args...) \
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unsigned long __sc_ret, __sc_err; \
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{ \
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register unsigned long __sc_0 __asm__ ("r0"); \
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register unsigned long __sc_3 __asm__ ("r3"); \
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register unsigned long __sc_4 __asm__ ("r4"); \
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register unsigned long __sc_5 __asm__ ("r5"); \
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register unsigned long __sc_6 __asm__ ("r6"); \
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register unsigned long __sc_7 __asm__ ("r7"); \
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\
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__sc_loadargs_##nr(name, args); \
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__asm__ __volatile__ \
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("sc \n\t" \
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"mfcr %0 " \
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: "=&r" (__sc_0), \
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"=&r" (__sc_3), "=&r" (__sc_4), \
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"=&r" (__sc_5), "=&r" (__sc_6), \
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"=&r" (__sc_7) \
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: __sc_asm_input_##nr \
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: "cr0", "ctr", "memory", \
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"r8", "r9", "r10","r11", "r12"); \
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__sc_ret = __sc_3; \
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__sc_err = __sc_0; \
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} \
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if (__sc_err & 0x10000000) \
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{ \
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errno = __sc_ret; \
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__sc_ret = -1; \
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} \
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return (type) __sc_ret
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#define __sc_loadargs_0(name, dummy...) \
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__sc_0 = __NR_##name
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#define __sc_loadargs_1(name, arg1) \
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__sc_loadargs_0(name); \
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__sc_3 = (unsigned long) (arg1)
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#define __sc_loadargs_2(name, arg1, arg2) \
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__sc_loadargs_1(name, arg1); \
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__sc_4 = (unsigned long) (arg2)
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#define __sc_loadargs_3(name, arg1, arg2, arg3) \
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__sc_loadargs_2(name, arg1, arg2); \
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__sc_5 = (unsigned long) (arg3)
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#define __sc_loadargs_4(name, arg1, arg2, arg3, arg4) \
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__sc_loadargs_3(name, arg1, arg2, arg3); \
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__sc_6 = (unsigned long) (arg4)
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#define __sc_loadargs_5(name, arg1, arg2, arg3, arg4, arg5) \
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__sc_loadargs_4(name, arg1, arg2, arg3, arg4); \
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__sc_7 = (unsigned long) (arg5)
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#define __sc_asm_input_0 "0" (__sc_0)
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#define __sc_asm_input_1 __sc_asm_input_0, "1" (__sc_3)
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#define __sc_asm_input_2 __sc_asm_input_1, "2" (__sc_4)
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#define __sc_asm_input_3 __sc_asm_input_2, "3" (__sc_5)
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#define __sc_asm_input_4 __sc_asm_input_3, "4" (__sc_6)
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#define __sc_asm_input_5 __sc_asm_input_4, "5" (__sc_7)
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#undef _syscall6
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#define _syscall0(type,name) \
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type name (void) \
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{ \
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__syscall_nr(0, type, name); \
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return syscall(__NR_##name); \
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}
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#define _syscall1(type,name,type1,arg1) \
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type name (type1 arg1) \
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{ \
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__syscall_nr(1, type, name, arg1); \
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return syscall(__NR_##name, arg1); \
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}
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#define _syscall2(type,name,type1,arg1,type2,arg2) \
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type name (type1 arg1,type2 arg2) \
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{ \
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__syscall_nr(2, type, name, arg1, arg2); \
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return syscall(__NR_##name, arg1, arg2); \
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}
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#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
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type name (type1 arg1,type2 arg2,type3 arg3) \
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{ \
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__syscall_nr(3, type, name, arg1, arg2, arg3); \
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return syscall(__NR_##name, arg1, arg2, arg3); \
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}
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#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
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type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4) \
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{ \
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__syscall_nr(4, type, name, arg1, arg2, arg3, arg4); \
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return syscall(__NR_##name, arg1, arg2, arg3, arg4); \
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}
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#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
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#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
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type5,arg5) \
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type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
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{ \
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__syscall_nr(5, type, name, arg1, arg2, arg3, arg4, arg5); \
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return syscall(__NR_##name, arg1, arg2, arg3, arg4, arg5); \
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}
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#endif
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#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
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type5,arg5,type6,arg6) \
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type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \
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{ \
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return syscall(__NR_##name, arg1, arg2, arg3, arg4, arg5, arg6); \
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}
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#define __NR_sys_uname __NR_uname
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#define __NR_sys_getcwd1 __NR_getcwd
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@ -35,7 +35,10 @@
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#include <linux/unistd.h>
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#include <linux/version.h>
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_syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount)
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int modify_ldt(int func, void *ptr, unsigned long bytecount)
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{
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return syscall(__NR_modify_ldt, func, ptr, bytecount);
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}
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 66)
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#define modify_ldt_ldt_s user_desc
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