c++/8029: g++ produces ICE on kernel asm implementations of string functions

[kirill at il dot ibm dot com]

>Number:         8029
>Category:       c++
>Synopsis:       g++ produces ICE on kernel asm implementations of string functions
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Wed Sep 25 02:06:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Kirill Shoikhet
>Release:        gcc version 2.96 20000731 (Red Hat Linux 7.3 2.96-110)
>Organization:
>Environment:
RedHat 7.2 or 7.3
>Description:
main.cpp: In function `int main ()':
main.cpp:5: Internal error: Segmentation fault.
Please submit a full bug report.
See <URL:http://bugzilla.redhat.com/bugzilla/> for instructions.
>How-To-Repeat:
The main.ii file produced by the following command which produces the above error
g++ -c -D__KERNEL__ -I /usr/src/linux/include main.c -save-temps
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="main.ii"
Content-Disposition: inline; filename="main.ii"

# 1 "main.c"
# 1 "/usr/src/linux/include/linux/string.h" 1







# 1 "/usr/src/linux/include/linux/types.h" 1




# 1 "/usr/src/linux/include/linux/config.h" 1



# 1 "/usr/src/linux/include/linux/autoconf.h" 1
# 1 "/usr/src/linux/include/linux/rhconfig.h" 1
# 13 "/usr/src/linux/include/linux/rhconfig.h"
# 1 "/boot/kernel.h" 1
# 14 "/usr/src/linux/include/linux/rhconfig.h" 2
# 2 "/usr/src/linux/include/linux/autoconf.h" 2
# 5 "/usr/src/linux/include/linux/config.h" 2
# 6 "/usr/src/linux/include/linux/types.h" 2


# 1 "/usr/src/linux/include/linux/posix_types.h" 1



# 1 "/usr/src/linux/include/linux/stddef.h" 1
# 5 "/usr/src/linux/include/linux/posix_types.h" 2
# 36 "/usr/src/linux/include/linux/posix_types.h"
typedef struct {
        unsigned long fds_bits [(1024/(8 * sizeof(unsigned long)))];
} __kernel_fd_set;


typedef void (*__kernel_sighandler_t)(int);


typedef int __kernel_key_t;

# 1 "/usr/src/linux/include/asm/posix_types.h" 1
# 10 "/usr/src/linux/include/asm/posix_types.h"
typedef unsigned short __kernel_dev_t;
typedef unsigned long __kernel_ino_t;
typedef unsigned short __kernel_mode_t;
typedef unsigned short __kernel_nlink_t;
typedef long __kernel_off_t;
typedef int __kernel_pid_t;
typedef unsigned short __kernel_ipc_pid_t;
typedef unsigned short __kernel_uid_t;
typedef unsigned short __kernel_gid_t;
typedef unsigned int __kernel_size_t;
typedef int __kernel_ssize_t;
typedef int __kernel_ptrdiff_t;
typedef long __kernel_time_t;
typedef long __kernel_suseconds_t;
typedef long __kernel_clock_t;
typedef int __kernel_daddr_t;
typedef char * __kernel_caddr_t;
typedef unsigned short __kernel_uid16_t;
typedef unsigned short __kernel_gid16_t;
typedef unsigned int __kernel_uid32_t;
typedef unsigned int __kernel_gid32_t;

typedef unsigned short __kernel_old_uid_t;
typedef unsigned short __kernel_old_gid_t;


typedef long long __kernel_loff_t;


typedef struct {

        int val[2];



} __kernel_fsid_t;
# 47 "/usr/src/linux/include/linux/posix_types.h" 2
# 9 "/usr/src/linux/include/linux/types.h" 2
# 1 "/usr/src/linux/include/asm/types.h" 1



typedef unsigned short umode_t;






typedef __signed__ char __s8;
typedef unsigned char __u8;

typedef __signed__ short __s16;
typedef unsigned short __u16;

typedef __signed__ int __s32;
typedef unsigned int __u32;


typedef __signed__ long long __s64;
typedef unsigned long long __u64;







typedef signed char s8;
typedef unsigned char u8;

typedef signed short s16;
typedef unsigned short u16;

typedef signed int s32;
typedef unsigned int u32;

typedef signed long long s64;
typedef unsigned long long u64;





typedef u32 dma_addr_t;
# 10 "/usr/src/linux/include/linux/types.h" 2



typedef __kernel_fd_set fd_set;
typedef __kernel_dev_t dev_t;
typedef __kernel_ino_t ino_t;
typedef __kernel_mode_t mode_t;
typedef __kernel_nlink_t nlink_t;
typedef __kernel_off_t off_t;
typedef __kernel_pid_t pid_t;
typedef __kernel_daddr_t daddr_t;
typedef __kernel_key_t key_t;
typedef __kernel_suseconds_t suseconds_t;


typedef __kernel_uid32_t uid_t;
typedef __kernel_gid32_t gid_t;
typedef __kernel_uid16_t uid16_t;
typedef __kernel_gid16_t gid16_t;



typedef __kernel_old_uid_t old_uid_t;
typedef __kernel_old_gid_t old_gid_t;
# 45 "/usr/src/linux/include/linux/types.h"
typedef __kernel_loff_t loff_t;
# 54 "/usr/src/linux/include/linux/types.h"
typedef __kernel_size_t size_t;




typedef __kernel_ssize_t ssize_t;




typedef __kernel_ptrdiff_t ptrdiff_t;




typedef __kernel_time_t time_t;




typedef __kernel_clock_t clock_t;




typedef __kernel_caddr_t caddr_t;



typedef unsigned char u_char;
typedef unsigned short u_short;
typedef unsigned int u_int;
typedef unsigned long u_long;


typedef unsigned char unchar;
typedef unsigned short ushort;
typedef unsigned int uint;
typedef unsigned long ulong;




typedef __u8 u_int8_t;
typedef __s8 int8_t;
typedef __u16 u_int16_t;
typedef __s16 int16_t;
typedef __u32 u_int32_t;
typedef __s32 int32_t;



typedef __u8 uint8_t;
typedef __u16 uint16_t;
typedef __u32 uint32_t;


typedef __u64 uint64_t;
typedef __u64 u_int64_t;
typedef __s64 int64_t;
# 123 "/usr/src/linux/include/linux/types.h"
struct ustat {
        __kernel_daddr_t f_tfree;
        __kernel_ino_t f_tinode;
        char f_fname[6];
        char f_fpack[6];
};
# 9 "/usr/src/linux/include/linux/string.h" 2
# 1 "/usr/src/linux/include/linux/stddef.h" 1
# 10 "/usr/src/linux/include/linux/string.h" 2




extern "C" {


extern char * ___strtok;
extern char * strpbrk(const char *,const char *);
extern char * strtok(char *,const char *);
extern char * strsep(char **,const char *);
extern __kernel_size_t strspn(const char *,const char *);





# 1 "/usr/src/linux/include/asm/string.h" 1




# 1 "/usr/src/linux/include/linux/config.h" 1
# 6 "/usr/src/linux/include/asm/string.h" 2
# 33 "/usr/src/linux/include/asm/string.h"
static inline char * strcpy(char * dest,const char *src)
{
int d0, d1, d2;
__asm__ __volatile__(
        "1:\tlodsb\n\t"
        "stosb\n\t"
        "testb %%al,%%al\n\t"
        "jne 1b"
        : "=&S" (d0), "=&D" (d1), "=&a" (d2)
        :"0" (src),"1" (dest) : "memory");
return dest;
}


static inline char * strncpy(char * dest,const char *src,size_t count)
{
int d0, d1, d2, d3;
__asm__ __volatile__(
        "1:\tdecl %2\n\t"
        "js 2f\n\t"
        "lodsb\n\t"
        "stosb\n\t"
        "testb %%al,%%al\n\t"
        "jne 1b\n\t"
        "rep\n\t"
        "stosb\n"
        "2:"
        : "=&S" (d0), "=&D" (d1), "=&c" (d2), "=&a" (d3)
        :"0" (src),"1" (dest),"2" (count) : "memory");
return dest;
}


static inline char * strcat(char * dest,const char * src)
{
int d0, d1, d2, d3;
__asm__ __volatile__(
        "repne\n\t"
        "scasb\n\t"
        "decl %1\n"
        "1:\tlodsb\n\t"
        "stosb\n\t"
        "testb %%al,%%al\n\t"
        "jne 1b"
        : "=&S" (d0), "=&D" (d1), "=&a" (d2), "=&c" (d3)
        : "0" (src), "1" (dest), "2" (0), "3" (0xffffffff):"memory");
return dest;
}


static inline char * strncat(char * dest,const char * src,size_t count)
{
int d0, d1, d2, d3;
__asm__ __volatile__(
        "repne\n\t"
        "scasb\n\t"
        "decl %1\n\t"
        "movl %8,%3\n"
        "1:\tdecl %3\n\t"
        "js 2f\n\t"
        "lodsb\n\t"
        "stosb\n\t"
        "testb %%al,%%al\n\t"
        "jne 1b\n"
        "2:\txorl %2,%2\n\t"
        "stosb"
        : "=&S" (d0), "=&D" (d1), "=&a" (d2), "=&c" (d3)
        : "0" (src),"1" (dest),"2" (0),"3" (0xffffffff), "g" (count)
        : "memory");
return dest;
}


static inline int strcmp(const char * cs,const char * ct)
{
int d0, d1;
register int __res;
__asm__ __volatile__(
        "1:\tlodsb\n\t"
        "scasb\n\t"
        "jne 2f\n\t"
        "testb %%al,%%al\n\t"
        "jne 1b\n\t"
        "xorl %%eax,%%eax\n\t"
        "jmp 3f\n"
        "2:\tsbbl %%eax,%%eax\n\t"
        "orb $1,%%al\n"
        "3:"
        :"=a" (__res), "=&S" (d0), "=&D" (d1)
                     :"1" (cs),"2" (ct));
return __res;
}


static inline int strncmp(const char * cs,const char * ct,size_t count)
{
register int __res;
int d0, d1, d2;
__asm__ __volatile__(
        "1:\tdecl %3\n\t"
        "js 2f\n\t"
        "lodsb\n\t"
        "scasb\n\t"
        "jne 3f\n\t"
        "testb %%al,%%al\n\t"
        "jne 1b\n"
        "2:\txorl %%eax,%%eax\n\t"
        "jmp 4f\n"
        "3:\tsbbl %%eax,%%eax\n\t"
        "orb $1,%%al\n"
        "4:"
                     :"=a" (__res), "=&S" (d0), "=&D" (d1), "=&c" (d2)
                     :"1" (cs),"2" (ct),"3" (count));
return __res;
}


static inline char * strchr(const char * s, int c)
{
int d0;
register char * __res;
__asm__ __volatile__(
        "movb %%al,%%ah\n"
        "1:\tlodsb\n\t"
        "cmpb %%ah,%%al\n\t"
        "je 2f\n\t"
        "testb %%al,%%al\n\t"
        "jne 1b\n\t"
        "movl $1,%1\n"
        "2:\tmovl %1,%0\n\t"
        "decl %0"
        :"=a" (__res), "=&S" (d0) : "1" (s),"0" (c));
return __res;
}


static inline char * strrchr(const char * s, int c)
{
int d0, d1;
register char * __res;
__asm__ __volatile__(
        "movb %%al,%%ah\n"
        "1:\tlodsb\n\t"
        "cmpb %%ah,%%al\n\t"
        "jne 2f\n\t"
        "leal -1(%%esi),%0\n"
        "2:\ttestb %%al,%%al\n\t"
        "jne 1b"
        :"=g" (__res), "=&S" (d0), "=&a" (d1) :"0" (0),"1" (s),"2" (c));
return __res;
}


static inline size_t strlen(const char * s)
{
int d0;
register int __res;
__asm__ __volatile__(
        "repne\n\t"
        "scasb\n\t"
        "notl %0\n\t"
        "decl %0"
        :"=c" (__res), "=&D" (d0) :"1" (s),"a" (0), "0" (0xffffffff));
return __res;
}

static inline void * __memcpy(void * to, const void * from, size_t n)
{
int d0, d1, d2;
__asm__ __volatile__(
        "rep ; movsl\n\t"
        "testb $2,%b4\n\t"
        "je 1f\n\t"
        "movsw\n"
        "1:\ttestb $1,%b4\n\t"
        "je 2f\n\t"
        "movsb\n"
        "2:"
        : "=&c" (d0), "=&D" (d1), "=&S" (d2)
        :"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from)
        : "memory");
return (to);
}





static inline void * __constant_memcpy(void * to, const void * from, size_t n)
{
        switch (n) {
                case 0:
                        return to;
                case 1:
                        *(unsigned char *)to = *(const unsigned char *)from;
                        return to;
                case 2:
                        *(unsigned short *)to = *(const unsigned short *)from;
                        return to;
                case 3:
                        *(unsigned short *)to = *(const unsigned short *)from;
                        *(2+(unsigned char *)to) = *(2+(const unsigned char *)from);
                        return to;
                case 4:
                        *(unsigned long *)to = *(const unsigned long *)from;
                        return to;
                case 6:
                        *(unsigned long *)to = *(const unsigned long *)from;
                        *(2+(unsigned short *)to) = *(2+(const unsigned short *)from);
                        return to;
                case 8:
                        *(unsigned long *)to = *(const unsigned long *)from;
                        *(1+(unsigned long *)to) = *(1+(const unsigned long *)from);
                        return to;
                case 12:
                        *(unsigned long *)to = *(const unsigned long *)from;
                        *(1+(unsigned long *)to) = *(1+(const unsigned long *)from);
                        *(2+(unsigned long *)to) = *(2+(const unsigned long *)from);
                        return to;
                case 16:
                        *(unsigned long *)to = *(const unsigned long *)from;
                        *(1+(unsigned long *)to) = *(1+(const unsigned long *)from);
                        *(2+(unsigned long *)to) = *(2+(const unsigned long *)from);
                        *(3+(unsigned long *)to) = *(3+(const unsigned long *)from);
                        return to;
                case 20:
                        *(unsigned long *)to = *(const unsigned long *)from;
                        *(1+(unsigned long *)to) = *(1+(const unsigned long *)from);
                        *(2+(unsigned long *)to) = *(2+(const unsigned long *)from);
                        *(3+(unsigned long *)to) = *(3+(const unsigned long *)from);
                        *(4+(unsigned long *)to) = *(4+(const unsigned long *)from);
                        return to;
        }







{
        int d0, d1, d2;
        switch (n % 4) {
                case 0: __asm__ __volatile__( "rep ; movsl" "" : "=&c" (d0), "=&D" (d1), "=&S" (d2) : "0" (n/4),"1" ((long) to),"2" ((long) from) : "memory");; return to;
                case 1: __asm__ __volatile__( "rep ; movsl" "\n\tmovsb" : "=&c" (d0), "=&D" (d1), "=&S" (d2) : "0" (n/4),"1" ((long) to),"2" ((long) from) : "memory");; return to;
                case 2: __asm__ __volatile__( "rep ; movsl" "\n\tmovsw" : "=&c" (d0), "=&D" (d1), "=&S" (d2) : "0" (n/4),"1" ((long) to),"2" ((long) from) : "memory");; return to;
                default: __asm__ __volatile__( "rep ; movsl" "\n\tmovsw\n\tmovsb" : "=&c" (d0), "=&D" (d1), "=&S" (d2) : "0" (n/4),"1" ((long) to),"2" ((long) from) : "memory");; return to;
        }
}


}
# 335 "/usr/src/linux/include/asm/string.h"
extern void __struct_cpy_bug (void);
# 345 "/usr/src/linux/include/asm/string.h"
static inline void * memmove(void * dest,const void * src, size_t n)
{
int d0, d1, d2;
if (dest<src)
__asm__ __volatile__(
        "rep\n\t"
        "movsb"
        : "=&c" (d0), "=&S" (d1), "=&D" (d2)
        :"0" (n),"1" (src),"2" (dest)
        : "memory");
else
__asm__ __volatile__(
        "std\n\t"
        "rep\n\t"
        "movsb\n\t"
        "cld"
        : "=&c" (d0), "=&S" (d1), "=&D" (d2)
        :"0" (n),
         "1" (n-1+(const char *)src),
         "2" (n-1+(char *)dest)
        :"memory");
return dest;
}




static inline void * memchr(const void * cs,int c,size_t count)
{
int d0;
register void * __res;
if (!count)
        return 0;
__asm__ __volatile__(
        "repne\n\t"
        "scasb\n\t"
        "je 1f\n\t"
        "movl $1,%0\n"
        "1:\tdecl %0"
        :"=D" (__res), "=&c" (d0) : "a" (c),"0" (cs),"1" (count));
return __res;
}

static inline void * __memset_generic(void * s, char c,size_t count)
{
int d0, d1;
__asm__ __volatile__(
        "rep\n\t"
        "stosb"
        : "=&c" (d0), "=&D" (d1)
        :"a" (c),"1" (s),"0" (count)
        :"memory");
return s;
}
# 408 "/usr/src/linux/include/asm/string.h"
static inline void * __constant_c_memset(void * s, unsigned long c, size_t count)
{
int d0, d1;
__asm__ __volatile__(
        "rep ; stosl\n\t"
        "testb $2,%b3\n\t"
        "je 1f\n\t"
        "stosw\n"
        "1:\ttestb $1,%b3\n\t"
        "je 2f\n\t"
        "stosb\n"
        "2:"
        : "=&c" (d0), "=&D" (d1)
        :"a" (c), "q" (count), "0" (count/4), "1" ((long) s)
        :"memory");
return (s);
}



static inline size_t strnlen(const char * s, size_t count)
{
int d0;
register int __res;
__asm__ __volatile__(
        "movl %2,%0\n\t"
        "jmp 2f\n"
        "1:\tcmpb $0,(%0)\n\t"
        "je 3f\n\t"
        "incl %0\n"
        "2:\tdecl %1\n\t"
        "cmpl $-1,%1\n\t"
        "jne 1b\n"
        "3:\tsubl %2,%0"
        :"=a" (__res), "=&d" (d0)
        :"c" (s),"1" (count));
return __res;
}




extern char *strstr(const char *cs, const char *ct);





static inline void * __constant_c_and_count_memset(void * s, unsigned long pattern, size_t count)
{
        switch (count) {
                case 0:
                        return s;
                case 1:
                        *(unsigned char *)s = pattern;
                        return s;
                case 2:
                        *(unsigned short *)s = pattern;
                        return s;
                case 3:
                        *(unsigned short *)s = pattern;
                        *(2+(unsigned char *)s) = pattern;
                        return s;
                case 4:
                        *(unsigned long *)s = pattern;
                        return s;
        }







{
        int d0, d1;
        switch (count % 4) {
                case 0: __asm__ __volatile__( "rep ; stosl" "" : "=&c" (d0), "=&D" (d1) : "a" (pattern),"0" (count/4),"1" ((long) s) : "memory"); return s;
                case 1: __asm__ __volatile__( "rep ; stosl" "\n\tstosb" : "=&c" (d0), "=&D" (d1) : "a" (pattern),"0" (count/4),"1" ((long) s) : "memory"); return s;
                case 2: __asm__ __volatile__( "rep ; stosl" "\n\tstosw" : "=&c" (d0), "=&D" (d1) : "a" (pattern),"0" (count/4),"1" ((long) s) : "memory"); return s;
                default: __asm__ __volatile__( "rep ; stosl" "\n\tstosw\n\tstosb" : "=&c" (d0), "=&D" (d1) : "a" (pattern),"0" (count/4),"1" ((long) s) : "memory"); return s;
        }
}


}
# 515 "/usr/src/linux/include/asm/string.h"
static inline void * memscan(void * addr, int c, size_t size)
{
        if (!size)
                return addr;
        __asm__("repnz; scasb\n\t"
                "jnz 1f\n\t"
                "dec %%edi\n"
                "1:"
                : "=D" (addr), "=c" (size)
                : "0" (addr), "1" (size), "a" (c));
        return addr;
}
# 28 "/usr/src/linux/include/linux/string.h" 2
# 48 "/usr/src/linux/include/linux/string.h"
extern int strnicmp(const char *, const char *, __kernel_size_t);
# 79 "/usr/src/linux/include/linux/string.h"
extern int __builtin_memcmp(const void *,const void *,__kernel_size_t);






}
# 2 "main.c" 2

int main()
{
        int kuku = strlen("kjfdjhg");

        return kuku;
}