musl/arch/x86_64/reloc.h

#define LDSO_ARCH "x86_64"

#define REL_SYMBOLIC    R_X86_64_64
#define REL_OFFSET32    R_X86_64_PC32
#define REL_GOT         R_X86_64_GLOB_DAT
#define REL_PLT         R_X86_64_JUMP_SLOT
#define REL_RELATIVE    R_X86_64_RELATIVE
#define REL_COPY        R_X86_64_COPY
#define REL_DTPMOD      R_X86_64_DTPMOD64
#define REL_DTPOFF      R_X86_64_DTPOFF64
#define REL_TPOFF       R_X86_64_TPOFF64
#define REL_TLSDESC     R_X86_64_TLSDESC

#define CRTJMP(pc,sp) __asm__ __volatile__( \
	"mov %1,%%rsp ; jmp *%0" : : "r"(pc), "r"(sp) : "memory" )

#define GETFUNCSYM(fp, sym, got) __asm__ ( \
	".hidden " #sym "\n" \
	"	lea " #sym "(%%rip),%0\n" \
	: "=r"(*fp) : : "memory" )