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1325 |
phoenix |
/*
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* Various assmbly language/system dependent hacks that are required
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* so that we can minimize the amount of platform specific code.
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*/
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/*
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* Define this if the system uses RELOCA.
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*/
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#define ELF_USES_RELOCA
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/*
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* Get a pointer to the argv array. On many platforms this can be just
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* the address if the first argument, on other platforms we need to
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* do something a little more subtle here.
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*/
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#define GET_ARGV(ARGVP, ARGS) ARGVP = ((unsigned long*) ARGS)
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/*
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* Initialization sequence for a GOT.
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*/
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#define INIT_GOT(GOT_BASE,MODULE) \
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{ \
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GOT_BASE[2] = (unsigned long) _dl_linux_resolve; \
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GOT_BASE[1] = (unsigned long) (MODULE); \
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}
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/*
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* Here is a macro to perform a relocation. This is only used when
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* bootstrapping the dynamic loader. RELP is the relocation that we
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* are performing, REL is the pointer to the address we are relocating.
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* SYMBOL is the symbol involved in the relocation, and LOAD is the
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* load address.
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*/
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#define PERFORM_BOOTSTRAP_RELOC(RELP,REL,SYMBOL,LOAD,SYMTAB) \
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switch(ELF32_R_TYPE((RELP)->r_info)){ \
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case R_SH_REL32: \
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*(REL) = (SYMBOL) + (RELP)->r_addend \
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- (unsigned long)(REL); \
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break; \
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case R_SH_DIR32: \
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case R_SH_GLOB_DAT: \
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case R_SH_JMP_SLOT: \
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*(REL) = (SYMBOL) + (RELP)->r_addend; \
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break; \
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case R_SH_RELATIVE: \
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*(REL) = (LOAD) + (RELP)->r_addend; \
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break; \
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case R_SH_NONE: \
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break; \
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default: \
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SEND_STDERR("BOOTSTRAP_RELOC: unhandled reloc type "); \
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SEND_NUMBER_STDERR(ELF32_R_TYPE((RELP)->r_info), 1); \
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SEND_STDERR("REL, SYMBOL, LOAD: "); \
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SEND_ADDRESS_STDERR(REL, 0); \
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SEND_STDERR(", "); \
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SEND_ADDRESS_STDERR(SYMBOL, 0); \
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SEND_STDERR(", "); \
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SEND_ADDRESS_STDERR(LOAD, 1); \
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_dl_exit(1); \
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}
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/*
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* Transfer control to the user's application, once the dynamic loader
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* is done. This routine has to exit the current function, then
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* call the _dl_elf_main function.
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*/
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#define START() return _dl_elf_main;
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/* Here we define the magic numbers that this dynamic loader should accept */
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#define MAGIC1 EM_SH
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#undef MAGIC2
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/* Used for error messages */
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#define ELF_TARGET "sh"
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struct elf_resolve;
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extern unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry);
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static __inline__ unsigned int
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_dl_urem(unsigned int n, unsigned int base)
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{
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int res;
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__asm__ (""\
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"mov #0, r0\n\t" \
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"div0u\n\t" \
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"" \
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"! get one bit from the msb of the numerator into the T\n\t" \
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"! bit and divide it by whats in %2. Put the answer bit\n\t" \
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"! into the T bit so it can come out again at the bottom\n\t" \
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"" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1 ; div1 %2, r0\n\t" \
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"rotcl %1\n\t"
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: "=r" (res)
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: "0" (n), "r" (base)
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: "r0","cc");
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return n - (base * res);
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}
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#define do_rem(result, n, base) ((result) = _dl_urem((n), (base)))
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/* 4096 bytes alignment */
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#define PAGE_ALIGN 0xfffff000
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#define ADDR_ALIGN 0xfff
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#define OFFS_ALIGN 0x7ffff000
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