Convert gcc assembly to ldc one

[drug]

Hello!

Could you help to port this code:
```
__asm__ __volatile__ (
	"990: nop\n"                                                 \
	".pushsection .note.stapsdt,\"?\",\"note\"\n"                \
	".balign 4\n"                                                \
	".4byte 992f-991f, 994f-993f, 3\n"                           \
	"991: .asciz \"stapsdt\"\n"                                  \
	"992: .balign 4\n"                                           \
	"993: .8byte 990b\n"                                         \
	".8byte _.stapsdt.base\n"                                    \
	".8byte 0\n"                                                 \
	".asciz \"myapp\"\n"                                         \
	".asciz \"func_call\"\n"                                     \
	".asciz \"%n[_SDT_S1]@%[_SDT_A1] %n[_SDT_S2]@%[_SDT_A2]\"\n" \
	"994: .balign 4\n"                                           \
	".popsection\n"
	:: [_SDT_S1] "n" (4),
	   [_SDT_A1] "nor" ((a)),
	   [_SDT_S2] "n" (4),
	   [_SDT_A2] "nor" ((b))
);
```

I failed to find what is the ldc analog to gnu assembler InputOperands. 
What I need is converting ((a)) expression to `-4(%rbp)` string and 
((b)) expression to `-8(%rbp)`