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/* vi: set sw=8 ts=8: */
/*
* Various assmbly language/system dependent hacks that are required
* so that we can minimize the amount of platform specific code.
*/
/* Define this if the system uses RELOCA. */
#undef ELF_USES_RELOCA
#include <elf.h>
#include <link.h>
#define ARCH_NUM 3
#define DT_MIPS_GOTSYM_IDX (DT_NUM + OS_NUM)
#define DT_MIPS_LOCAL_GOTNO_IDX (DT_NUM + OS_NUM +1)
#define DT_MIPS_SYMTABNO_IDX (DT_NUM + OS_NUM +2)
#define ARCH_DYNAMIC_INFO(dpnt, dynamic, debug_addr) \
do { \
if (dpnt->d_tag == DT_MIPS_GOTSYM) \
dynamic[DT_MIPS_GOTSYM_IDX] = dpnt->d_un.d_val; \
else if(dpnt->d_tag == DT_MIPS_LOCAL_GOTNO) \
dynamic[DT_MIPS_LOCAL_GOTNO_IDX] = dpnt->d_un.d_val; \
else if(dpnt->d_tag == DT_MIPS_SYMTABNO) \
dynamic[DT_MIPS_SYMTABNO_IDX] = dpnt->d_un.d_val; \
else if (dpnt->d_tag == DT_MIPS_RLD_MAP) \
*(Elf32_Addr *)(dpnt->d_un.d_ptr) = (Elf32_Addr) debug_addr; \
} while (0)
/* Initialization sequence for the application/library GOT. */
#define INIT_GOT(GOT_BASE,MODULE) \
do { \
unsigned long idx; \
\
/* Check if this is the dynamic linker itself */ \
if (MODULE->libtype == program_interpreter) \
continue; \
\
/* Fill in first two GOT entries according to the ABI */ \
GOT_BASE[0] = (unsigned long) _dl_runtime_resolve; \
GOT_BASE[1] = (unsigned long) MODULE; \
\
/* Add load address displacement to all local GOT entries */ \
idx = 2; \
while (idx < MODULE->dynamic_info[DT_MIPS_LOCAL_GOTNO_IDX]) \
GOT_BASE[idx++] += (unsigned long) MODULE->loadaddr; \
\
} while (0)
/* Here we define the magic numbers that this dynamic loader should accept */
#define MAGIC1 EM_MIPS
#define MAGIC2 EM_MIPS_RS3_LE
/* Used for error messages */
#define ELF_TARGET "MIPS"
unsigned long __dl_runtime_resolve(unsigned long sym_index,
unsigned long old_gpreg);
struct elf_resolve;
void _dl_perform_mips_global_got_relocations(struct elf_resolve *tpnt, int lazy);
/* 4096 bytes alignment */
#define PAGE_ALIGN 0xfffff000
#define ADDR_ALIGN 0xfff
#define OFFS_ALIGN 0x7ffff000
#define elf_machine_type_class(type) ELF_RTYPE_CLASS_PLT
/* MIPS does not have COPY relocs */
#define DL_NO_COPY_RELOCS
#define OFFSET_GP_GOT 0x7ff0
static inline ElfW(Addr) *
elf_mips_got_from_gpreg (ElfW(Addr) gpreg)
{
/* FIXME: the offset of gp from GOT may be system-dependent. */
return (ElfW(Addr) *) (gpreg - OFFSET_GP_GOT);
}
/* Return the link-time address of _DYNAMIC. Conveniently, this is the
first element of the GOT. This must be inlined in a function which
uses global data. We assume its $gp points to the primary GOT. */
static inline ElfW(Addr)
elf_machine_dynamic (void)
{
register ElfW(Addr) gp __asm__ ("$28");
return *elf_mips_got_from_gpreg (gp);
}
#define STRINGXP(X) __STRING(X)
#define STRINGXV(X) STRINGV_(X)
#define STRINGV_(...) # __VA_ARGS__
#define PTR_LA la
#define PTR_SUBU subu
/* Return the run-time load address of the shared object. */
static inline ElfW(Addr)
elf_machine_load_address (void)
{
ElfW(Addr) addr;
asm (" .set noreorder\n"
" " STRINGXP (PTR_LA) " %0, 0f\n"
" bltzal $0, 0f\n"
" nop\n"
"0: " STRINGXP (PTR_SUBU) " %0, $31, %0\n"
" .set reorder\n"
: "=r" (addr)
: /* No inputs */
: "$31");
return addr;
}
static inline void
elf_machine_relative (Elf32_Addr load_off, const Elf32_Addr rel_addr,
Elf32_Word relative_count)
{
/* No REALTIVE relocs in MIPS? */
}
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