github.com/afumu/libc@v0.0.6/musl/arch/x32/reloc.h (about)

     1  #define LDSO_ARCH "x32"
     2  
     3  /* FIXME: x32 is very strange in its use of 64-bit relocation types in
     4   * a 32-bit environment. As long as the memory at reloc_addr is
     5   * zero-filled prior to relocations, just treating 64-bit relocations
     6   * as operating on 32-bit slots should be fine, but this should be
     7   * checked. In particular, R_X86_64_64, R_X86_64_DTPOFF64, and
     8   * R_X86_64_TPOFF64 may need checking. */
     9  
    10  /* The R_X86_64_64, R_X86_64_DTPOFF32, and R_X86_64_TPOFF32 reloc types
    11   * were previously mapped in the switch table form of this file; however,
    12   * they do not seem to be used/usable for anything. If needed, new
    13   * mappings will have to be added. */
    14  
    15  #define REL_SYMBOLIC    R_X86_64_32
    16  #define REL_OFFSET      R_X86_64_PC32
    17  #define REL_GOT         R_X86_64_GLOB_DAT
    18  #define REL_PLT         R_X86_64_JUMP_SLOT
    19  #define REL_RELATIVE    R_X86_64_RELATIVE
    20  #define REL_COPY        R_X86_64_COPY
    21  #define REL_DTPMOD      R_X86_64_DTPMOD64
    22  #define REL_DTPOFF      R_X86_64_DTPOFF64
    23  #define REL_TPOFF       R_X86_64_TPOFF64
    24  
    25  #define CRTJMP(pc,sp) __asm__ __volatile__( \
    26  	"mov %1,%%esp ; jmp *%0" : : "r"((uint64_t)(uintptr_t)pc), "r"(sp) : "memory" )
    27  
    28  #define GETFUNCSYM(fp, sym, got) __asm__ ( \
    29  	".hidden " #sym "\n" \
    30  	"	lea " #sym "(%%rip),%0\n" \
    31  	: "=r"(*fp) : : "memory" )