diff options
Diffstat (limited to 'ldso/ldso/m68k/ld_sysdep.h')
-rw-r--r-- | ldso/ldso/m68k/ld_sysdep.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/ldso/ldso/m68k/ld_sysdep.h b/ldso/ldso/m68k/ld_sysdep.h new file mode 100644 index 000000000..24af47ca0 --- /dev/null +++ b/ldso/ldso/m68k/ld_sysdep.h @@ -0,0 +1,87 @@ + +/* 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. */ +#define ELF_USES_RELOCA + +/* 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 int *) &(ARGS))) + +/* Get the address of the Global offset table. This must be absolute, + not relative. */ +#define GET_GOT(X) __asm__ ("movel %%a5,%0" : "=g" (X)) + +/* Initialization sequence for a GOT. */ +#define INIT_GOT(GOT_BASE,MODULE) \ +{ \ + GOT_BASE[2] = (int) _dl_linux_resolve; \ + GOT_BASE[1] = (int) (MODULE); \ +} + +/* 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) \ + switch (ELF32_R_TYPE ((RELP)->r_info)) \ + { \ + case R_68K_8: \ + *(char *) (REL) = (SYMBOL) + (RELP)->r_addend; \ + break; \ + case R_68K_16: \ + *(short *) (REL) = (SYMBOL) + (RELP)->r_addend; \ + break; \ + case R_68K_32: \ + *(REL) = (SYMBOL) + (RELP)->r_addend; \ + break; \ + case R_68K_PC8: \ + *(char *) (REL) = ((SYMBOL) + (RELP)->r_addend \ + - (unsigned int) (REL)); \ + break; \ + case R_68K_PC16: \ + *(short *) (REL) = ((SYMBOL) + (RELP)->r_addend \ + - (unsigned int) (REL)); \ + break; \ + case R_68K_PC32: \ + *(REL) = ((SYMBOL) + (RELP)->r_addend \ + - (unsigned int) (REL)); \ + break; \ + case R_68K_GLOB_DAT: \ + case R_68K_JMP_SLOT: \ + *(REL) = (SYMBOL); \ + break; \ + case R_68K_RELATIVE: /* Compatibility kludge */ \ + *(REL) = ((unsigned int) (LOAD) + ((RELP)->r_addend ? : *(REL))); \ + break; \ + default: \ + _dl_exit (1); \ + } + + +/* Transfer control to the user's application, once the dynamic loader + is done. */ + +#define START() \ + __asm__ volatile ("unlk %%a6\n\t" \ + "jmp %0@" \ + : : "a" (_dl_elf_main)); + + + +/* Here we define the magic numbers that this dynamic loader should accept */ + +#define MAGIC1 EM_68K +#undef MAGIC2 +/* Used for error messages */ +#define ELF_TARGET "m68k" + +struct elf_resolve; +extern unsigned int _dl_linux_resolver (int, int, struct elf_resolve *, int); + +/* Define this because we do not want to call .udiv in the library. + Not needed for m68k. */ +#define do_rem(result, n, base) ((result) = (n) % (base)) |