(top-gdb) maint print register-groups Name Nr Rel Offset Size Type Groups eax 0 0 0 4 int general,all,save,restore ecx 1 1 4 4 int general,all,save,restore edx 2 2 8 4 int general,all,save,restore ebx 3 3 12 4 int general,all,save,restore esp 4 4 16 4 *1 general,all,save,restore ebp 5 5 20 4 *1 general,all,save,restore esi 6 6 24 4 int general,all,save,restore edi 7 7 28 4 int general,all,save,restore eip 8 8 32 4 *1 general,all,save,restore eflags 9 9 36 4 int general,all,save,restore cs 10 10 40 4 int general,all,save,restore ss 11 11 44 4 int general,all,save,restore ds 12 12 48 4 int general,all,save,restore es 13 13 52 4 int general,all,save,restore fs 14 14 56 4 int general,all,save,restore gs 15 15 60 4 int general,all,save,restore st0 16 16 64 10 _i387_ext float,all,save,restore st1 17 17 74 10 _i387_ext float,all,save,restore st2 18 18 84 10 _i387_ext float,all,save,restore st3 19 19 94 10 _i387_ext float,all,save,restore st4 20 20 104 10 _i387_ext float,all,save,restore st5 21 21 114 10 _i387_ext float,all,save,restore st6 22 22 124 10 _i387_ext float,all,save,restore st7 23 23 134 10 _i387_ext float,all,save,restore fctrl 24 24 144 4 int float,all,save,restore fstat 25 25 148 4 int float,all,save,restore ftag 26 26 152 4 int float,all,save,restore fiseg 27 27 156 4 int float,all,save,restore fioff 28 28 160 4 int float,all,save,restore foseg 29 29 164 4 int float,all,save,restore fooff 30 30 168 4 int float,all,save,restore fop 31 31 172 4 int float,all,save,restore xmm0 32 32 176 16 _vec128i sse,all,save,restore,vector xmm1 33 33 192 16 _vec128i sse,all,save,restore,vector xmm2 34 34 208 16 _vec128i sse,all,save,restore,vector xmm3 35 35 224 16 _vec128i sse,all,save,restore,vector xmm4 36 36 240 16 _vec128i sse,all,save,restore,vector xmm5 37 37 256 16 _vec128i sse,all,save,restore,vector xmm6 38 38 272 16 _vec128i sse,all,save,restore,vector xmm7 39 39 288 16 _vec128i sse,all,save,restore,vector mxcsr 40 40 304 4 int sse,all,save,restore,vector orig_eax 41 41 308 4 int save,restore,system mm0 42 0 312 8 _vec64i mmx,all,vector mm1 43 1 320 8 _vec64i mmx,all,vector mm2 44 2 328 8 _vec64i mmx,all,vector mm3 45 3 336 8 _vec64i mmx,all,vector mm4 46 4 344 8 _vec64i mmx,all,vector mm5 47 5 352 8 _vec64i mmx,all,vector mm6 48 6 360 8 _vec64i mmx,all,vector mm7 49 7 368 8 _vec64i mmx,all,vector *1: Register type's name NULL. (top-gdb) info registers eax 0x1 1 ecx 0x0 0 edx 0xbffff844 -1073743804 ebx 0x401d1e34 1075650100 esp 0xbffff7b4 0xbffff7b4 ebp 0xbffff7d8 0xbffff7d8 esi 0x40016b4c 1073834828 edi 0xbffff844 -1073743804 eip 0x8074b3c 0x8074b3c eflags 0x286 646 cs 0x23 35 ss 0x2b 43 ds 0x2b 43 es 0x2b 43 fs 0x0 0 gs 0x0 0