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Hi, I managed to add FP number support to gdb for Linux/x86. But I have a problem with the FP number print in gdb: (gdb) info all ebx 0x4000ac64 1073785956 ecx 0x4 4 edx 0x4009c808 1074382856 esi 0x1 1 edi 0x80483fc 134513660 ebp 0xbffffbe8 0xbffffbe8 eax 0x8048530 134513968 ds 0x2b 43 es 0x2b 43 fs 0x2b 43 gs 0x2b 43 orig_eax 0xffffffff -1 eip 0x80484e1 0x80484e1 cs 0x23 35 eflags 0x286 646 esp 0xbffffbd8 0xbffffbd8 ss 0x2b 43 fctrl 0xffff037f -64641 fstat 0xffff3000 -53248 ftag 0xffff0fff -61441 fip 0x80484db 134513883 fcs 0x5050023 84213795 fopoff 0x8048554 134514004 ---Type <return> to continue, or q <return> to quit--- fopsel 0xffff002b -65493 st0 -5.7277807836949922e+250 (raw 0x4003f400000000000000) st1 -0 (raw 0x3ffe8000000000000000) st2 0 (raw 0x00000000000000000000) st3 0 (raw 0x00000000000000000000) st4 -1.0842021724855044e-19 (raw 0x4003bc00000000000000) st5 -3.0649910817317777e+54 (raw 0x4007cb40000000000000) st6 0 (raw 0x00000000000000000000) st7 0 (raw 0x00000000000000000000) (gdb) p $st0 $1 = -5.7277807836949922e+250 (gdb) whatis $st0 type = double (gdb) p (long double) $st0 Can't deal with a floating point number of 16 bytes. (gdb) The problem is the FP number in x87 register is stored in long double format. But gdb doesn't know how to print them. I was wondering if anyone had added x87 long double support to gdb. Thanks. -- H.J. Lu (hjl@gnu.org)