diff options
Diffstat (limited to 'ldso/ldso/frv/dl-startup.h')
-rw-r--r-- | ldso/ldso/frv/dl-startup.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/ldso/ldso/frv/dl-startup.h b/ldso/ldso/frv/dl-startup.h index 017efc0ad..98c5677f6 100644 --- a/ldso/ldso/frv/dl-startup.h +++ b/ldso/ldso/frv/dl-startup.h @@ -87,3 +87,65 @@ _dl_boot (void *dl_boot_got_pointer, \ X) struct elf32_fdpic_loadmap; + +/* + * Get a pointer to the argv array. On many platforms this can be just + * the address if the first argument, on other platforms we need to + * do something a little more subtle here. + */ +#define GET_ARGV(ARGVP, ARGS) ARGVP = ((unsigned long*) ARGS) + +/* + * Compute the GOT address. On several platforms, we use assembly + * here. on FR-V FDPIC, there's no way to compute the GOT address, + * since the offset between text and data is not fixed, so we arrange + * for the assembly _dl_boot to pass this value as an argument to + * _dl_boot. */ +#define DL_BOOT_COMPUTE_GOT(got) ((got) = dl_boot_got_pointer) + +#define DL_BOOT_COMPUTE_DYN(dpnt, got, load_addr) \ + ((dpnt) = dl_boot_ldso_dyn_pointer) + +/* + * Here is a macro to perform a relocation. This is only used when + * bootstrapping the dynamic loader. RELP is the relocation that we + * are performing, REL is the pointer to the address we are relocating. + * SYMBOL is the symbol involved in the relocation, and LOAD is the + * load address. + */ +#define PERFORM_BOOTSTRAP_RELOC(RELP,REL,SYMBOL,LOAD,SYMTAB) \ + switch(ELF32_R_TYPE((RELP)->r_info)){ \ + case R_FRV_32: \ + *(REL) += (SYMBOL); \ + break; \ + case R_FRV_FUNCDESC_VALUE: \ + { \ + struct funcdesc_value fv = { \ + (void*)((SYMBOL) + *(REL)), \ + (LOAD).got_value \ + }; \ + *(struct funcdesc_value volatile *)(REL) = fv; \ + break; \ + } \ + default: \ + _dl_exit(1); \ + } + +/* + * Transfer control to the user's application, once the dynamic loader + * is done. We return the address of the function's entry point to + * _dl_boot, see boot1_arch.h. + */ +#define START() do { \ + struct elf_resolve *exec_mod = _dl_loaded_modules; \ + dl_main_funcdesc->entry_point = _dl_elf_main; \ + while (exec_mod->libtype != elf_executable) \ + exec_mod = exec_mod->next; \ + dl_main_funcdesc->got_value = exec_mod->loadaddr.got_value; \ + /* _dl_dprintf(2, "entry point is (%x,%x)\n", dl_main_funcdesc->entry_point, dl_main_funcdesc->got_value); */ \ + return; \ +} while (0) + + + + |