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use glibc syscall (David Woodhouse)

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1966 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2006-06-14 13:37:16 +00:00
parent 5b9053a5ea
commit 83fcb51548
2 changed files with 39 additions and 104 deletions
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138
linux-user/syscall.c
View File

@ -79,127 +79,59 @@
#define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct dirent [2])
#if defined(__powerpc__)
#undef __syscall_nr
#undef __sc_loadargs_0
#undef __sc_loadargs_1
#undef __sc_loadargs_2
#undef __sc_loadargs_3
#undef __sc_loadargs_4
#undef __sc_loadargs_5
#undef __sc_asm_input_0
#undef __sc_asm_input_1
#undef __sc_asm_input_2
#undef __sc_asm_input_3
#undef __sc_asm_input_4
#undef __sc_asm_input_5
#undef _syscall0
#undef _syscall1
#undef _syscall2
#undef _syscall3
#undef _syscall4
#undef _syscall5
#undef _syscall6
/* need to redefine syscalls as Linux kernel defines are incorrect for
the clobber list */
/* On powerpc a system call basically clobbers the same registers like a
* function call, with the exception of LR (which is needed for the
* "sc; bnslr" sequence) and CR (where only CR0.SO is clobbered to signal
* an error return status).
*/
#define __syscall_nr(nr, type, name, args...) \
unsigned long __sc_ret, __sc_err; \
{ \
register unsigned long __sc_0 __asm__ ("r0"); \
register unsigned long __sc_3 __asm__ ("r3"); \
register unsigned long __sc_4 __asm__ ("r4"); \
register unsigned long __sc_5 __asm__ ("r5"); \
register unsigned long __sc_6 __asm__ ("r6"); \
register unsigned long __sc_7 __asm__ ("r7"); \
\
__sc_loadargs_##nr(name, args); \
__asm__ __volatile__ \
("sc \n\t" \
"mfcr %0 " \
: "=&r" (__sc_0), \
"=&r" (__sc_3), "=&r" (__sc_4), \
"=&r" (__sc_5), "=&r" (__sc_6), \
"=&r" (__sc_7) \
: __sc_asm_input_##nr \
: "cr0", "ctr", "memory", \
"r8", "r9", "r10","r11", "r12"); \
__sc_ret = __sc_3; \
__sc_err = __sc_0; \
} \
if (__sc_err & 0x10000000) \
{ \
errno = __sc_ret; \
__sc_ret = -1; \
} \
return (type) __sc_ret
#define __sc_loadargs_0(name, dummy...) \
__sc_0 = __NR_##name
#define __sc_loadargs_1(name, arg1) \
__sc_loadargs_0(name); \
__sc_3 = (unsigned long) (arg1)
#define __sc_loadargs_2(name, arg1, arg2) \
__sc_loadargs_1(name, arg1); \
__sc_4 = (unsigned long) (arg2)
#define __sc_loadargs_3(name, arg1, arg2, arg3) \
__sc_loadargs_2(name, arg1, arg2); \
__sc_5 = (unsigned long) (arg3)
#define __sc_loadargs_4(name, arg1, arg2, arg3, arg4) \
__sc_loadargs_3(name, arg1, arg2, arg3); \
__sc_6 = (unsigned long) (arg4)
#define __sc_loadargs_5(name, arg1, arg2, arg3, arg4, arg5) \
__sc_loadargs_4(name, arg1, arg2, arg3, arg4); \
__sc_7 = (unsigned long) (arg5)
#define __sc_asm_input_0 "0" (__sc_0)
#define __sc_asm_input_1 __sc_asm_input_0, "1" (__sc_3)
#define __sc_asm_input_2 __sc_asm_input_1, "2" (__sc_4)
#define __sc_asm_input_3 __sc_asm_input_2, "3" (__sc_5)
#define __sc_asm_input_4 __sc_asm_input_3, "4" (__sc_6)
#define __sc_asm_input_5 __sc_asm_input_4, "5" (__sc_7)
#define _syscall0(type,name) \
type name(void) \
{ \
__syscall_nr(0, type, name); \
#define _syscall0(type,name) \
type name (void) \
{ \
return syscall(__NR_##name); \
}
#define _syscall1(type,name,type1,arg1) \
type name(type1 arg1) \
{ \
__syscall_nr(1, type, name, arg1); \
#define _syscall1(type,name,type1,arg1) \
type name (type1 arg1) \
{ \
return syscall(__NR_##name, arg1); \
}
#define _syscall2(type,name,type1,arg1,type2,arg2) \
type name(type1 arg1, type2 arg2) \
{ \
__syscall_nr(2, type, name, arg1, arg2); \
#define _syscall2(type,name,type1,arg1,type2,arg2) \
type name (type1 arg1,type2 arg2) \
{ \
return syscall(__NR_##name, arg1, arg2); \
}
#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
type name(type1 arg1, type2 arg2, type3 arg3) \
{ \
__syscall_nr(3, type, name, arg1, arg2, arg3); \
#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
type name (type1 arg1,type2 arg2,type3 arg3) \
{ \
return syscall(__NR_##name, arg1, arg2, arg3); \
}
#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4) \
{ \
__syscall_nr(4, type, name, arg1, arg2, arg3, arg4); \
#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4) \
{ \
return syscall(__NR_##name, arg1, arg2, arg3, arg4); \
}
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) \
{ \
__syscall_nr(5, type, name, arg1, arg2, arg3, arg4, arg5); \
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5) \
type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
{ \
return syscall(__NR_##name, arg1, arg2, arg3, arg4, arg5); \
}
#endif
#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5,type6,arg6) \
type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \
{ \
return syscall(__NR_##name, arg1, arg2, arg3, arg4, arg5, arg6); \
}
#define __NR_sys_uname __NR_uname
#define __NR_sys_getcwd1 __NR_getcwd

5
target-i386/helper2.c
View File

@ -35,7 +35,10 @@
#include <linux/unistd.h>
#include <linux/version.h>
_syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount)
int modify_ldt(int func, void *ptr, unsigned long bytecount)
{
return syscall(__NR_modify_ldt, func, ptr, bytecount);
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 66)
#define modify_ldt_ldt_s user_desc