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egcs v1.1.1 compiler bug? @ Linux v2.2.0-pre6 / depca.c
- To: linux-kernel at vger dot rutgers dot edu, egcs-bugs at cygnus dot com
- Subject: egcs v1.1.1 compiler bug? @ Linux v2.2.0-pre6 / depca.c
- From: Markus Linnala <maage at cs dot tut dot fi>
- Date: 11 Jan 1999 05:30:39 +0200
- Reply-To: Markus Linnala <maage at cs dot tut dot fi>
Tried to compile with egcs v1.1.1 and seems compiler barfs at depca.c.
Linux kernel version is 2.2.0-pre6
Any verifications? And I'm sorry I'm not able to debug this further.
------------------------------------------------------------------------
/usr/local/bin/egcs -D__KERNEL__ -I/usr/src/linux-2.2.0-pre6-egcs/include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -pipe -fno-strength-reduce -mpentium -DCPU=586 -DMODULE -DMODVERSIONS -include /usr/src/linux-2.2.0-pre6-egcs/include/linux/modversions.h -c -o depca.o depca.c
depca.c: In function `EISA_signature':
depca.c:1802: fixed or forbidden register 7 (sp) was spilled for class GENERAL_REGS.
This may be due to a compiler bug or to impossible asm
statements or clauses.
------------------------------------------------------------------------
--[[text/plain]]
I've reduced problem to following part:
------------------------------------------------------------------------
/usr/local/bin/egcs -v -O2 -fno-strength-reduce -c depca_bug.c
Reading specs from /usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.91.60/specs
gcc version egcs-2.91.60 19981201 (egcs-1.1.1 release)
/usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.91.60/cpp -lang-c -v -undef -D__GNUC__=2 -D__GNUC_MINOR__=91 -D__ELF__ -Dunix -Di386 -D__i386__ -Dlinux -D__ELF__ -D__unix__ -D__i386__ -D__i386__ -D__linux__ -D__unix -D__i386 -D__linux -Asystem(posix) -D__OPTIMIZE__ -Asystem(unix) -Acpu(i386) -Amachine(i386) -Di386 -D__i386 -D__i386__ -Di586 -Dpentium -D__i586 -D__i586__ -D__pentium -D__pentium__ depca_bug.c /tmp/cccRZWpW.i
GNU CPP version egcs-2.91.60 19981201 (egcs-1.1.1 release) (i386 Linux/ELF)
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/usr/local/i586-pc-linux-gnu/include
/usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.91.60/include
/usr/include
End of search list.
/usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.91.60/cc1 /tmp/cccRZWpW.i -quiet -dumpbase depca_bug.c -O2 -version -fno-strength-reduce -o /tmp/cc0GxsHU.s
GNU C version egcs-2.91.60 19981201 (egcs-1.1.1 release) (i586-pc-linux-gnu) compiled by GNU C version egcs-2.91.60 19981201 (egcs-1.1.1 release).
depca_bug.c: In function `EISA_signature':
depca_bug.c:70: fixed or forbidden register 7 (sp) was spilled for class GENERAL_REGS.
This may be due to a compiler bug or to impossible asm
statements or clauses.
------------------------------------------------------------------------
depca_bug.c follows
--[[text/plain]]
extern inline unsigned int inl (unsigned short port) { unsigned int _v; __asm__ __volatile__ ("in" "l" " %" "w" "1,%" "" "0" : "=a" (_v) : "Nd" (port) ); return _v; } extern inline unsigned int inl_p (unsigned short port) { unsigned int _v; __asm__ __volatile__ ("in" "l" " %" "w" "1,%" "" "0" "\noutb %%al,$0x80" : "=a" (_v) : "Nd" (port) ); return _v; }
extern inline char * strcpy(char * dest,const char *src)
{
int d0, d1, d2;
__asm__ __volatile__(
"cld\n"
"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;
}
extern inline char * strstr(const char * cs,const char * ct)
{
int d0, d1, d2, d3;
register char * __res;
__asm__ __volatile__(
"cld\n\t" "movl %8,%%edi\n\t"
"repne\n\t"
"scasb\n\t"
"notl %%ecx\n\t"
"decl %%ecx\n\t"
"movl %%ecx,%%edx\n"
"1:\tmovl %8,%%edi\n\t"
"movl %%esi,%%eax\n\t"
"movl %%edx,%%ecx\n\t"
"repe\n\t"
"cmpsb\n\t"
"je 2f\n\t"
"xchgl %%eax,%%esi\n\t"
"incl %%esi\n\t"
"cmpb $0,-1(%%eax)\n\t"
"jne 1b\n\t"
"xorl %%eax,%%eax\n\t"
"2:"
:"=a" (__res), "=&c" (d0), "=&S" (d1), "=&d" (d2), "=&D" (d3) : "0" (0),"1" (0xffffffff),"2" (cs),"g" (ct));
return __res;
}
static int
EISA_signature(char *name, int eisa_id)
{
unsigned int i;
const char *signatures[] = {"DEPCA", "DE100","DE101", "DE200","DE201","DE202", "DE210","DE212", "DE422", ""} ;
char ManCode[16 ];
union {
int ID;
char Id[4];
} Eisa;
int status = 0;
*name = '\0';
Eisa.ID = inl(eisa_id);
ManCode[0]=(((Eisa.Id[0]>>2)&0x1f)+0x40);
ManCode[1]=(((Eisa.Id[1]&0xe0)>>5)+((Eisa.Id[0]&0x03)<<3)+0x40);
ManCode[2]=(((Eisa.Id[2]>>4)&0x0f)+0x30);
ManCode[3]=(( Eisa.Id[2]&0x0f)+0x30);
ManCode[4]=(((Eisa.Id[3]>>4)&0x0f)+0x30);
ManCode[5]='\0';
for (i=0;(*signatures[i] != '\0') && (*name == '\0');i++) {
if (strstr(ManCode, signatures[i]) != ((void *) 0) ) {
strcpy(name,ManCode);
status = 1;
}
}
return status;
}
--[[text/plain]]
#My kernel configuration:
CONFIG_EXPERIMENTAL=y
CONFIG_M586TSC=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_TSC=y
CONFIG_MODULES=y
CONFIG_MODVERSIONS=y
CONFIG_KMOD=y
CONFIG_NET=y
CONFIG_PCI=y
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_QUIRKS=y
CONFIG_SYSVIPC=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_SYSCTL=y
CONFIG_BINFMT_AOUT=m
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=m
CONFIG_PARPORT=m
CONFIG_PARPORT_PC=m
CONFIG_BLK_DEV_FD=y
CONFIG_BLK_DEV_IDE=y
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_BLK_DEV_IDECD=m
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_MD=y
CONFIG_MD_LINEAR=y
CONFIG_MD_STRIPED=y
CONFIG_MD_MIRRORING=m
CONFIG_MD_RAID5=m
CONFIG_BLK_DEV_RAM=m
CONFIG_BLK_DEV_XD=m
CONFIG_PARIDE_PARPORT=m
CONFIG_PACKET=y
CONFIG_NETLINK=y
CONFIG_RTNETLINK=y
CONFIG_NETLINK_DEV=y
CONFIG_FIREWALL=y
CONFIG_NET_ALIAS=y
CONFIG_FILTER=y
CONFIG_UNIX=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_FIREWALL=y
CONFIG_IP_FIREWALL_NETLINK=y
CONFIG_NETLINK_DEV=y
CONFIG_NET_IPIP=m
CONFIG_NET_IPGRE=m
CONFIG_IP_ALIAS=y
CONFIG_SYN_COOKIES=y
CONFIG_INET_RARP=m
CONFIG_IP_NOSR=y
CONFIG_SKB_LARGE=y
CONFIG_NETDEVICES=y
CONFIG_DUMMY=m
CONFIG_ETHERTAP=m
CONFIG_NET_ETHERNET=y
CONFIG_NET_VENDOR_3COM=y
CONFIG_EL3=y
CONFIG_NET_ISA=y
CONFIG_DEPCA=m
CONFIG_NE2000=m
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_SERIAL=y
CONFIG_UNIX98_PTYS=y
CONFIG_UNIX98_PTY_COUNT=256
CONFIG_PRINTER=m
CONFIG_PRINTER_READBACK=y
CONFIG_NVRAM=m
CONFIG_RTC=y
CONFIG_FTAPE=m
CONFIG_ZFTAPE=m
CONFIG_ZFT_DFLT_BLK_SZ=10240
CONFIG_ZFT_COMPRESSOR=m
CONFIG_FT_NR_BUFFERS=3
CONFIG_FT_PROC_FS=y
CONFIG_FT_NORMAL_DEBUG=y
CONFIG_FT_STD_FDC=y
CONFIG_FT_FDC_THR=8
CONFIG_FT_FDC_MAX_RATE=2000
CONFIG_FT_ALPHA_CLOCK=0
CONFIG_AUTOFS_FS=m
CONFIG_FAT_FS=m
CONFIG_MSDOS_FS=m
CONFIG_UMSDOS_FS=m
CONFIG_VFAT_FS=m
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_PROC_FS=y
CONFIG_DEVPTS_FS=y
CONFIG_EXT2_FS=y
CONFIG_CODA_FS=m
CONFIG_NFS_FS=y
CONFIG_NFSD=m
CONFIG_SUNRPC=y
CONFIG_LOCKD=y
CONFIG_SMB_FS=m
CONFIG_NLS=y
CONFIG_NLS_CODEPAGE_437=m
CONFIG_NLS_CODEPAGE_737=m
CONFIG_NLS_CODEPAGE_775=m
CONFIG_NLS_CODEPAGE_850=m
CONFIG_NLS_CODEPAGE_852=m
CONFIG_NLS_CODEPAGE_855=m
CONFIG_NLS_CODEPAGE_857=m
CONFIG_NLS_CODEPAGE_860=m
CONFIG_NLS_CODEPAGE_861=m
CONFIG_NLS_CODEPAGE_862=m
CONFIG_NLS_CODEPAGE_863=m
CONFIG_NLS_CODEPAGE_864=m
CONFIG_NLS_CODEPAGE_865=m
CONFIG_NLS_CODEPAGE_866=m
CONFIG_NLS_CODEPAGE_869=m
CONFIG_NLS_CODEPAGE_874=m
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
CONFIG_NLS_ISO8859_3=m
CONFIG_NLS_ISO8859_4=m
CONFIG_NLS_ISO8859_5=m
CONFIG_NLS_ISO8859_6=m
CONFIG_NLS_ISO8859_7=m
CONFIG_NLS_ISO8859_8=m
CONFIG_NLS_ISO8859_9=m
CONFIG_NLS_ISO8859_15=m
CONFIG_NLS_KOI8_R=m
CONFIG_VGA_CONSOLE=y
CONFIG_VIDEO_SELECT=y
CONFIG_SOUND=m
CONFIG_SOUND_OSS=m
CONFIG_SOUND_SB=m
CONFIG_SOUND_ADLIB=m
CONFIG_SOUND_SOFTOSS=m
CONFIG_SOUND_YM3812=m
CONFIG_LOWLEVEL_SOUND=y
CONFIG_AWE32_SYNTH=m
CONFIG_MAGIC_SYSRQ=y
--[[text/plain]]
--
//Markus