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8243d6f1b7
* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_load_address): Don't rely on *r_offset of R_SPARC_RELATIVE reloc in .got to contain the addend. * sysdeps/sparc/sparc64/dl-machine.h (elf_machine_load_address): Use the same l_addr computation. * sysdeps/sparc/sparc64/configure.in: Removed. * sysdeps/sparc/sparc64/configure: Removed. * config.h.in (SPARC64_DYNAMIC_BEFORE_GOT): Remove.
764 lines
24 KiB
C
764 lines
24 KiB
C
/* Machine-dependent ELF dynamic relocation inline functions. Sparc64 version.
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Copyright (C) 1997,1998,1999,2000,2001,2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#define ELF_MACHINE_NAME "sparc64"
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#include <string.h>
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#include <sys/param.h>
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#include <ldsodefs.h>
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#include <sysdep.h>
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#ifndef VALIDX
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# define VALIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \
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+ DT_EXTRANUM + DT_VALTAGIDX (tag))
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#endif
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#define ELF64_R_TYPE_ID(info) ((info) & 0xff)
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#define ELF64_R_TYPE_DATA(info) ((info) >> 8)
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/* Return nonzero iff ELF header is compatible with the running host. */
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static inline int
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elf_machine_matches_host (const Elf64_Ehdr *ehdr)
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{
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return ehdr->e_machine == EM_SPARCV9;
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}
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/* We have to do this because elf_machine_{dynamic,load_address} can be
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invoked from functions that have no GOT references, and thus the compiler
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has no obligation to load the PIC register. */
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#define LOAD_PIC_REG(PIC_REG) \
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do { Elf64_Addr tmp; \
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__asm("sethi %%hi(_GLOBAL_OFFSET_TABLE_-4), %1\n\t" \
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"rd %%pc, %0\n\t" \
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"add %1, %%lo(_GLOBAL_OFFSET_TABLE_+4), %1\n\t" \
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"add %0, %1, %0" \
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: "=r" (PIC_REG), "=r" (tmp)); \
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} while (0)
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/* Return the link-time address of _DYNAMIC. Conveniently, this is the
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first element of the GOT. This must be inlined in a function which
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uses global data. */
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static inline Elf64_Addr
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elf_machine_dynamic (void)
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{
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register Elf64_Addr *elf_pic_register __asm__("%l7");
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LOAD_PIC_REG (elf_pic_register);
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return *elf_pic_register;
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}
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/* Return the run-time load address of the shared object. */
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static inline Elf64_Addr
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elf_machine_load_address (void)
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{
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register Elf32_Addr *pc __asm ("%o7");
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register Elf64_Addr *got __asm ("%l7");
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__asm ("sethi %%hi(_GLOBAL_OFFSET_TABLE_-4), %1\n\t"
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"call 1f\n\t"
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" add %1, %%lo(_GLOBAL_OFFSET_TABLE_+4), %1\n\t"
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"call _DYNAMIC\n\t"
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"call _GLOBAL_OFFSET_TABLE_\n"
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"1:\tadd %1, %0, %1\n\t" : "=r" (pc), "=r" (got));
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/* got is now l_addr + _GLOBAL_OFFSET_TABLE_
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*got is _DYNAMIC
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pc[2]*4 is l_addr + _DYNAMIC - (long)pc - 8
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pc[3]*4 is l_addr + _GLOBAL_OFFSET_TABLE_ - (long)pc - 12 */
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return (Elf64_Addr) got - *got + (Elf32_Sword) ((pc[2] - pc[3]) * 4) - 4;
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}
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/* We have 4 cases to handle. And we code different code sequences
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for each one. I love V9 code models... */
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static inline void
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sparc64_fixup_plt (struct link_map *map, const Elf64_Rela *reloc,
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Elf64_Addr *reloc_addr, Elf64_Addr value,
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Elf64_Addr high, int t)
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{
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unsigned int *insns = (unsigned int *) reloc_addr;
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Elf64_Addr plt_vaddr = (Elf64_Addr) reloc_addr;
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Elf64_Sxword disp = value - plt_vaddr;
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/* Now move plt_vaddr up to the call instruction. */
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plt_vaddr += ((t + 1) * 4);
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/* PLT entries .PLT32768 and above look always the same. */
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if (__builtin_expect (high, 0) != 0)
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{
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*reloc_addr = value - map->l_addr;
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}
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/* Near destination. */
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else if (disp >= -0x800000 && disp < 0x800000)
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{
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/* As this is just one instruction, it is thread safe and so
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we can avoid the unnecessary sethi FOO, %g1.
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b,a target */
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insns[0] = 0x30800000 | ((disp >> 2) & 0x3fffff);
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__asm __volatile ("flush %0" : : "r" (insns));
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}
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/* 32-bit Sparc style, the target is in the lower 32-bits of
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address space. */
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else if (insns += t, (value >> 32) == 0)
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{
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/* sethi %hi(target), %g1
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jmpl %g1 + %lo(target), %g0 */
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insns[1] = 0x81c06000 | (value & 0x3ff);
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__asm __volatile ("flush %0 + 4" : : "r" (insns));
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insns[0] = 0x03000000 | ((unsigned int)(value >> 10));
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__asm __volatile ("flush %0" : : "r" (insns));
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}
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/* We can also get somewhat simple sequences if the distance between
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the target and the PLT entry is within +/- 2GB. */
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else if ((plt_vaddr > value
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&& ((plt_vaddr - value) >> 31) == 0)
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|| (value > plt_vaddr
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&& ((value - plt_vaddr) >> 31) == 0))
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{
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unsigned int displacement;
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if (plt_vaddr > value)
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displacement = (0 - (plt_vaddr - value));
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else
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displacement = value - plt_vaddr;
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/* mov %o7, %g1
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call displacement
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mov %g1, %o7 */
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insns[2] = 0x9e100001;
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__asm __volatile ("flush %0 + 8" : : "r" (insns));
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insns[1] = 0x40000000 | (displacement >> 2);
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__asm __volatile ("flush %0 + 4" : : "r" (insns));
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insns[0] = 0x8210000f;
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__asm __volatile ("flush %0" : : "r" (insns));
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}
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/* Worst case, ho hum... */
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else
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{
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unsigned int high32 = (value >> 32);
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unsigned int low32 = (unsigned int) value;
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/* ??? Some tricks can be stolen from the sparc64 egcs backend
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constant formation code I wrote. -DaveM */
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if (__builtin_expect (high32 & 0x3ff, 0))
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{
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/* sethi %hh(value), %g1
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sethi %lm(value), %g5
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or %g1, %hm(value), %g1
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or %g5, %lo(value), %g5
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sllx %g1, 32, %g1
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jmpl %g1 + %g5, %g0
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nop */
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insns[5] = 0x81c04005;
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__asm __volatile ("flush %0 + 20" : : "r" (insns));
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insns[4] = 0x83287020;
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__asm __volatile ("flush %0 + 16" : : "r" (insns));
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insns[3] = 0x8a116000 | (low32 & 0x3ff);
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__asm __volatile ("flush %0 + 12" : : "r" (insns));
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insns[2] = 0x82106000 | (high32 & 0x3ff);
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}
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else
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{
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/* sethi %hh(value), %g1
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sethi %lm(value), %g5
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sllx %g1, 32, %g1
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or %g5, %lo(value), %g5
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jmpl %g1 + %g5, %g0
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nop */
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insns[4] = 0x81c04005;
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__asm __volatile ("flush %0 + 16" : : "r" (insns));
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insns[3] = 0x8a116000 | (low32 & 0x3ff);
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__asm __volatile ("flush %0 + 12" : : "r" (insns));
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insns[2] = 0x83287020;
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}
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__asm __volatile ("flush %0 + 8" : : "r" (insns));
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insns[1] = 0x0b000000 | (low32 >> 10);
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__asm __volatile ("flush %0 + 4" : : "r" (insns));
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insns[0] = 0x03000000 | (high32 >> 10);
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__asm __volatile ("flush %0" : : "r" (insns));
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}
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}
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static inline Elf64_Addr
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elf_machine_fixup_plt (struct link_map *map, lookup_t t,
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const Elf64_Rela *reloc,
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Elf64_Addr *reloc_addr, Elf64_Addr value)
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{
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sparc64_fixup_plt (map, reloc, reloc_addr, value + reloc->r_addend,
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reloc->r_addend, 1);
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return value;
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}
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/* Return the final value of a plt relocation. */
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static inline Elf64_Addr
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elf_machine_plt_value (struct link_map *map, const Elf64_Rela *reloc,
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Elf64_Addr value)
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{
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/* Don't add addend here, but in elf_machine_fixup_plt instead.
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value + reloc->r_addend is the value which should actually be
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stored into .plt data slot. */
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return value;
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}
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#ifdef RESOLVE
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/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
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MAP is the object containing the reloc. */
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static inline void
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elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
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const Elf64_Sym *sym, const struct r_found_version *version,
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Elf64_Addr *const reloc_addr)
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{
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const unsigned long int r_type = ELF64_R_TYPE_ID (reloc->r_info);
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#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
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if (__builtin_expect (r_type == R_SPARC_RELATIVE, 0))
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*reloc_addr = map->l_addr + reloc->r_addend;
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# ifndef RTLD_BOOTSTRAP
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else if (r_type == R_SPARC_NONE) /* Who is Wilbur? */
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return;
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# endif
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else
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#endif
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{
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#if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
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const Elf64_Sym *const refsym = sym;
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#endif
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Elf64_Addr value;
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#ifndef RESOLVE_CONFLICT_FIND_MAP
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if (sym->st_shndx != SHN_UNDEF &&
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ELF64_ST_BIND (sym->st_info) == STB_LOCAL)
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value = map->l_addr;
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else
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{
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value = RESOLVE (&sym, version, r_type);
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if (sym)
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value += sym->st_value;
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}
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#else
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value = 0;
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#endif
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value += reloc->r_addend; /* Assume copy relocs have zero addend. */
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switch (r_type)
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{
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#if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
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case R_SPARC_COPY:
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if (sym == NULL)
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/* This can happen in trace mode if an object could not be
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found. */
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break;
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if (sym->st_size > refsym->st_size
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|| (GL(dl_verbose) && sym->st_size < refsym->st_size))
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{
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const char *strtab;
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strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
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_dl_error_printf ("\
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%s: Symbol `%s' has different size in shared object, consider re-linking\n",
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rtld_progname ?: "<program name unknown>",
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strtab + refsym->st_name);
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}
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memcpy (reloc_addr, (void *) value, MIN (sym->st_size,
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refsym->st_size));
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break;
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#endif
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case R_SPARC_64:
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case R_SPARC_GLOB_DAT:
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*reloc_addr = value;
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break;
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#ifndef RTLD_BOOTSTRAP
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case R_SPARC_8:
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*(char *) reloc_addr = value;
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break;
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case R_SPARC_16:
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*(short *) reloc_addr = value;
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break;
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case R_SPARC_32:
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*(unsigned int *) reloc_addr = value;
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break;
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case R_SPARC_DISP8:
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*(char *) reloc_addr = (value - (Elf64_Addr) reloc_addr);
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break;
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case R_SPARC_DISP16:
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*(short *) reloc_addr = (value - (Elf64_Addr) reloc_addr);
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break;
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case R_SPARC_DISP32:
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*(unsigned int *) reloc_addr = (value - (Elf64_Addr) reloc_addr);
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break;
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case R_SPARC_WDISP30:
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*(unsigned int *) reloc_addr =
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((*(unsigned int *)reloc_addr & 0xc0000000) |
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((value - (Elf64_Addr) reloc_addr) >> 2));
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break;
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/* MEDLOW code model relocs */
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case R_SPARC_LO10:
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*(unsigned int *) reloc_addr =
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((*(unsigned int *)reloc_addr & ~0x3ff) |
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(value & 0x3ff));
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break;
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case R_SPARC_HI22:
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*(unsigned int *) reloc_addr =
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((*(unsigned int *)reloc_addr & 0xffc00000) |
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(value >> 10));
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break;
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case R_SPARC_OLO10:
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*(unsigned int *) reloc_addr =
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((*(unsigned int *)reloc_addr & ~0x1fff) |
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(((value & 0x3ff) + ELF64_R_TYPE_DATA (reloc->r_info)) & 0x1fff));
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break;
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/* MEDMID code model relocs */
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case R_SPARC_H44:
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*(unsigned int *) reloc_addr =
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((*(unsigned int *)reloc_addr & 0xffc00000) |
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(value >> 22));
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break;
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case R_SPARC_M44:
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*(unsigned int *) reloc_addr =
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((*(unsigned int *)reloc_addr & ~0x3ff) |
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((value >> 12) & 0x3ff));
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break;
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case R_SPARC_L44:
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*(unsigned int *) reloc_addr =
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((*(unsigned int *)reloc_addr & ~0xfff) |
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(value & 0xfff));
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break;
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/* MEDANY code model relocs */
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case R_SPARC_HH22:
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*(unsigned int *) reloc_addr =
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((*(unsigned int *)reloc_addr & 0xffc00000) |
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(value >> 42));
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break;
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case R_SPARC_HM10:
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*(unsigned int *) reloc_addr =
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((*(unsigned int *)reloc_addr & ~0x3ff) |
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((value >> 32) & 0x3ff));
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break;
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case R_SPARC_LM22:
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*(unsigned int *) reloc_addr =
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((*(unsigned int *)reloc_addr & 0xffc00000) |
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((value >> 10) & 0x003fffff));
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break;
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#endif
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case R_SPARC_JMP_SLOT:
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#ifdef RESOLVE_CONFLICT_FIND_MAP
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/* R_SPARC_JMP_SLOT conflicts against .plt[32768+]
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relocs should be turned into R_SPARC_64 relocs
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in .gnu.conflict section.
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r_addend non-zero does not mean it is a .plt[32768+]
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reloc, instead it is the actual address of the function
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to call. */
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sparc64_fixup_plt (NULL, reloc, reloc_addr, value, 0, 0);
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#else
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sparc64_fixup_plt (map, reloc, reloc_addr, value,
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reloc->r_addend, 0);
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#endif
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break;
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#ifndef RTLD_BOOTSTRAP
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case R_SPARC_UA16:
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((unsigned char *) reloc_addr) [0] = value >> 8;
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((unsigned char *) reloc_addr) [1] = value;
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break;
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case R_SPARC_UA32:
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((unsigned char *) reloc_addr) [0] = value >> 24;
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((unsigned char *) reloc_addr) [1] = value >> 16;
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((unsigned char *) reloc_addr) [2] = value >> 8;
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((unsigned char *) reloc_addr) [3] = value;
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break;
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case R_SPARC_UA64:
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if (! ((long) reloc_addr & 3))
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{
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/* Common in .eh_frame */
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((unsigned int *) reloc_addr) [0] = value >> 32;
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((unsigned int *) reloc_addr) [1] = value;
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break;
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}
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((unsigned char *) reloc_addr) [0] = value >> 56;
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((unsigned char *) reloc_addr) [1] = value >> 48;
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((unsigned char *) reloc_addr) [2] = value >> 40;
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((unsigned char *) reloc_addr) [3] = value >> 32;
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((unsigned char *) reloc_addr) [4] = value >> 24;
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((unsigned char *) reloc_addr) [5] = value >> 16;
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((unsigned char *) reloc_addr) [6] = value >> 8;
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((unsigned char *) reloc_addr) [7] = value;
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break;
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#endif
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|
#if !defined RTLD_BOOTSTRAP || defined _NDEBUG
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|
default:
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|
_dl_reloc_bad_type (map, r_type, 0);
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|
break;
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|
#endif
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|
}
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}
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}
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|
|
static inline void
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|
elf_machine_rela_relative (Elf64_Addr l_addr, const Elf64_Rela *reloc,
|
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Elf64_Addr *const reloc_addr)
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{
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*reloc_addr = l_addr + reloc->r_addend;
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}
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|
|
static inline void
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|
elf_machine_lazy_rel (struct link_map *map,
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Elf64_Addr l_addr, const Elf64_Rela *reloc)
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|
{
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switch (ELF64_R_TYPE (reloc->r_info))
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{
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case R_SPARC_NONE:
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break;
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|
case R_SPARC_JMP_SLOT:
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break;
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default:
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|
_dl_reloc_bad_type (map, ELFW(R_TYPE) (reloc->r_info), 1);
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break;
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}
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}
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#endif /* RESOLVE */
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|
|
/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so
|
|
PLT entries should not be allowed to define the value.
|
|
ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
|
|
of the main executable's symbols, as for a COPY reloc. */
|
|
#define elf_machine_type_class(type) \
|
|
((((type) == R_SPARC_JMP_SLOT) * ELF_RTYPE_CLASS_PLT) \
|
|
| (((type) == R_SPARC_COPY) * ELF_RTYPE_CLASS_COPY))
|
|
|
|
/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */
|
|
#define ELF_MACHINE_JMP_SLOT R_SPARC_JMP_SLOT
|
|
|
|
/* The SPARC never uses Elf64_Rel relocations. */
|
|
#define ELF_MACHINE_NO_REL 1
|
|
|
|
/* The SPARC overlaps DT_RELA and DT_PLTREL. */
|
|
#define ELF_MACHINE_PLTREL_OVERLAP 1
|
|
|
|
/* Set up the loaded object described by L so its unrelocated PLT
|
|
entries will jump to the on-demand fixup code in dl-runtime.c. */
|
|
|
|
static inline int
|
|
elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
|
|
{
|
|
if (l->l_info[DT_JMPREL] && lazy)
|
|
{
|
|
extern void _dl_runtime_resolve_0 (void);
|
|
extern void _dl_runtime_resolve_1 (void);
|
|
extern void _dl_runtime_profile_0 (void);
|
|
extern void _dl_runtime_profile_1 (void);
|
|
Elf64_Addr res0_addr, res1_addr;
|
|
unsigned int *plt = (void *) D_PTR (l, l_info[DT_PLTGOT]);
|
|
int i = 0;
|
|
|
|
if (! profile)
|
|
{
|
|
res0_addr = (Elf64_Addr) &_dl_runtime_resolve_0;
|
|
res1_addr = (Elf64_Addr) &_dl_runtime_resolve_1;
|
|
}
|
|
else
|
|
{
|
|
res0_addr = (Elf64_Addr) &_dl_runtime_profile_0;
|
|
res1_addr = (Elf64_Addr) &_dl_runtime_profile_1;
|
|
if (_dl_name_match_p (GL(dl_profile), l))
|
|
GL(dl_profile_map) = l;
|
|
}
|
|
|
|
/* PLT0 looks like:
|
|
|
|
save %sp, -192, %sp
|
|
sethi %hh(_dl_runtime_{resolve,profile}_0), %l0
|
|
sethi %lm(_dl_runtime_{resolve,profile}_0), %l1
|
|
or %l0, %hm(_dl_runtime_{resolve,profile}_0), %l0
|
|
or %l1, %lo(_dl_runtime_{resolve,profile}_0), %l1
|
|
sllx %l0, 32, %l0
|
|
jmpl %l0 + %l1, %l6
|
|
sethi %hi(0xffc00), %l2
|
|
*/
|
|
|
|
plt[0] = 0x9de3bf40;
|
|
plt[1] = 0x21000000 | (res0_addr >> (64 - 22));
|
|
plt[2] = 0x23000000 | ((res0_addr >> 10) & 0x003fffff);
|
|
plt[3] = 0xa0142000 | ((res0_addr >> 32) & 0x3ff);
|
|
plt[4] = 0xa2146000 | (res0_addr & 0x3ff);
|
|
plt[5] = 0xa12c3020;
|
|
plt[6] = 0xadc40011;
|
|
plt[7] = 0x250003ff;
|
|
|
|
/* PLT1 looks like:
|
|
|
|
save %sp, -192, %sp
|
|
sethi %hh(_dl_runtime_{resolve,profile}_1), %l0
|
|
sethi %lm(_dl_runtime_{resolve,profile}_1), %l1
|
|
or %l0, %hm(_dl_runtime_{resolve,profile}_1), %l0
|
|
or %l1, %lo(_dl_runtime_{resolve,profile}_1), %l1
|
|
sllx %l0, 32, %l0
|
|
jmpl %l0 + %l1, %l6
|
|
srlx %g1, 12, %o1
|
|
*/
|
|
|
|
plt[8 + 0] = 0x9de3bf40;
|
|
if (__builtin_expect (((res1_addr + 4) >> 32) & 0x3ff, 0))
|
|
i = 1;
|
|
else
|
|
res1_addr += 4;
|
|
plt[8 + 1] = 0x21000000 | (res1_addr >> (64 - 22));
|
|
plt[8 + 2] = 0x23000000 | ((res1_addr >> 10) & 0x003fffff);
|
|
if (__builtin_expect (i, 0))
|
|
plt[8 + 3] = 0xa0142000 | ((res1_addr >> 32) & 0x3ff);
|
|
else
|
|
plt[8 + 3] = 0xa12c3020;
|
|
plt[8 + 4] = 0xa2146000 | (res1_addr & 0x3ff);
|
|
if (__builtin_expect (i, 0))
|
|
plt[8 + 5] = 0xa12c3020;
|
|
plt[8 + 5 + i] = 0xadc40011;
|
|
plt[8 + 6 + i] = 0x9330700c;
|
|
|
|
/* Now put the magic cookie at the beginning of .PLT2
|
|
Entry .PLT3 is unused by this implementation. */
|
|
*((struct link_map **)(&plt[16 + 0])) = l;
|
|
|
|
if (__builtin_expect (l->l_info[VALIDX(DT_GNU_PRELINKED)] != NULL, 0)
|
|
|| __builtin_expect (l->l_info [VALIDX (DT_GNU_LIBLISTSZ)] != NULL, 0))
|
|
{
|
|
/* Need to reinitialize .plt to undo prelinking. */
|
|
Elf64_Rela *rela = (Elf64_Rela *) D_PTR (l, l_info[DT_JMPREL]);
|
|
Elf64_Rela *relaend
|
|
= (Elf64_Rela *) ((char *) rela
|
|
+ l->l_info[DT_PLTRELSZ]->d_un.d_val);
|
|
|
|
/* prelink must ensure there are no R_SPARC_NONE relocs left
|
|
in .rela.plt. */
|
|
while (rela < relaend)
|
|
{
|
|
if (__builtin_expect (rela->r_addend, 0) != 0)
|
|
{
|
|
Elf64_Addr slot = ((rela->r_offset + 0x400
|
|
- (Elf64_Addr) plt)
|
|
/ 0x1400) * 0x1400
|
|
+ (Elf64_Addr) plt - 0x400;
|
|
/* ldx [%o7 + X], %g1 */
|
|
unsigned int first_ldx = *(unsigned int *)(slot + 12);
|
|
Elf64_Addr ptr = slot + (first_ldx & 0xfff) + 4;
|
|
|
|
*(Elf64_Addr *) rela->r_offset
|
|
= (Elf64_Addr) plt
|
|
- (slot + ((rela->r_offset - ptr) / 8) * 24 + 4);
|
|
++rela;
|
|
continue;
|
|
}
|
|
|
|
*(unsigned int *) rela->r_offset
|
|
= 0x03000000 | (rela->r_offset - (Elf64_Addr) plt);
|
|
*(unsigned int *) (rela->r_offset + 4)
|
|
= 0x30680000 | ((((Elf64_Addr) plt + 32
|
|
- rela->r_offset - 4) >> 2) & 0x7ffff);
|
|
__asm __volatile ("flush %0" : : "r" (rela->r_offset));
|
|
__asm __volatile ("flush %0+4" : : "r" (rela->r_offset));
|
|
++rela;
|
|
}
|
|
}
|
|
}
|
|
|
|
return lazy;
|
|
}
|
|
|
|
/* This code is used in dl-runtime.c to call the `fixup' function
|
|
and then redirect to the address it returns. */
|
|
#define TRAMPOLINE_TEMPLATE(tramp_name, fixup_name) \
|
|
asm ("\n" \
|
|
" .text\n" \
|
|
" .globl " #tramp_name "_0\n" \
|
|
" .type " #tramp_name "_0, @function\n" \
|
|
" .align 32\n" \
|
|
"\t" #tramp_name "_0:\n" \
|
|
" ! sethi %hi(1047552), %l2 - Done in .PLT0\n" \
|
|
" ldx [%l6 + 32 + 8], %o0\n" \
|
|
" sub %g1, %l6, %l0\n" \
|
|
" xor %l2, -1016, %l2\n" \
|
|
" sethi %hi(5120), %l3 ! 160 * 32\n" \
|
|
" add %l0, %l2, %l0\n" \
|
|
" sethi %hi(32768), %l4\n" \
|
|
" udivx %l0, %l3, %l3\n" \
|
|
" sllx %l3, 2, %l1\n" \
|
|
" add %l1, %l3, %l1\n" \
|
|
" sllx %l1, 10, %l2\n" \
|
|
" sub %l4, 4, %l4 ! No thanks to Sun for not obeying their own ABI\n" \
|
|
" sllx %l1, 5, %l1\n" \
|
|
" sub %l0, %l2, %l0\n" \
|
|
" udivx %l0, 24, %l0\n" \
|
|
" add %l0, %l4, %l0\n" \
|
|
" add %l1, %l0, %l1\n" \
|
|
" add %l1, %l1, %l0\n" \
|
|
" add %l0, %l1, %l0\n" \
|
|
" mov %i7, %o2\n" \
|
|
" call " #fixup_name "\n" \
|
|
" sllx %l0, 3, %o1\n" \
|
|
" jmp %o0\n" \
|
|
" restore\n" \
|
|
" .size " #tramp_name "_0, . - " #tramp_name "_0\n" \
|
|
"\n" \
|
|
" .globl " #tramp_name "_1\n" \
|
|
" .type " #tramp_name "_1, @function\n" \
|
|
" ! tramp_name_1 + 4 needs to be .align 32\n" \
|
|
"\t" #tramp_name "_1:\n" \
|
|
" sub %l6, 4, %l6\n" \
|
|
" ! srlx %g1, 12, %o1 - Done in .PLT1\n" \
|
|
" ldx [%l6 + 12], %o0\n" \
|
|
" add %o1, %o1, %o3\n" \
|
|
" sub %o1, 96, %o1 ! No thanks to Sun for not obeying their own ABI\n" \
|
|
" mov %i7, %o2\n" \
|
|
" call " #fixup_name "\n" \
|
|
" add %o1, %o3, %o1\n" \
|
|
" jmp %o0\n" \
|
|
" restore\n" \
|
|
" .size " #tramp_name "_1, . - " #tramp_name "_1\n" \
|
|
" .previous\n");
|
|
|
|
#ifndef PROF
|
|
#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
|
|
TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup); \
|
|
TRAMPOLINE_TEMPLATE (_dl_runtime_profile, profile_fixup);
|
|
#else
|
|
#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
|
|
TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup); \
|
|
TRAMPOLINE_TEMPLATE (_dl_runtime_profile, fixup);
|
|
#endif
|
|
|
|
/* The PLT uses Elf64_Rela relocs. */
|
|
#define elf_machine_relplt elf_machine_rela
|
|
|
|
/* Initial entry point code for the dynamic linker.
|
|
The C function `_dl_start' is the real entry point;
|
|
its return value is the user program's entry point. */
|
|
|
|
#define __S1(x) #x
|
|
#define __S(x) __S1(x)
|
|
|
|
#define RTLD_START __asm__ ( "\n" \
|
|
" .text\n" \
|
|
" .global _start\n" \
|
|
" .type _start, @function\n" \
|
|
" .align 32\n" \
|
|
"_start:\n" \
|
|
" /* Make room for functions to drop their arguments on the stack. */\n" \
|
|
" sub %sp, 6*8, %sp\n" \
|
|
" /* Pass pointer to argument block to _dl_start. */\n" \
|
|
" call _dl_start\n" \
|
|
" add %sp," __S(STACK_BIAS) "+22*8,%o0\n" \
|
|
" /* FALLTHRU */\n" \
|
|
" .size _start, .-_start\n" \
|
|
"\n" \
|
|
" .global _dl_start_user\n" \
|
|
" .type _dl_start_user, @function\n" \
|
|
"_dl_start_user:\n" \
|
|
" /* Load the GOT register. */\n" \
|
|
"1: call 11f\n" \
|
|
" sethi %hi(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7\n" \
|
|
"11: or %l7, %lo(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7\n" \
|
|
" /* Store the highest stack address. */\n" \
|
|
" sethi %hi(__libc_stack_end), %g5\n" \
|
|
" add %l7, %o7, %l7\n" \
|
|
" or %g5, %lo(__libc_stack_end), %g5\n" \
|
|
" /* Save the user entry point address in %l0. */\n" \
|
|
" mov %o0, %l0\n" \
|
|
" ldx [%l7 + %g5], %l1\n" \
|
|
" sethi %hi(_dl_skip_args), %g5\n" \
|
|
" add %sp, 6*8, %l2\n" \
|
|
" /* See if we were run as a command with the executable file name as an\n" \
|
|
" extra leading argument. If so, we must shift things around since we\n" \
|
|
" must keep the stack doubleword aligned. */\n" \
|
|
" or %g5, %lo(_dl_skip_args), %g5\n" \
|
|
" stx %l2, [%l1]\n" \
|
|
" ldx [%l7 + %g5], %i0\n" \
|
|
" ld [%i0], %i0\n" \
|
|
" brz,pt %i0, 2f\n" \
|
|
" ldx [%sp + " __S(STACK_BIAS) " + 22*8], %i5\n" \
|
|
" /* Find out how far to shift. */\n" \
|
|
" sethi %hi(_dl_argv), %l4\n" \
|
|
" sub %i5, %i0, %i5\n" \
|
|
" or %l4, %lo(_dl_argv), %l4\n" \
|
|
" sllx %i0, 3, %l6\n" \
|
|
" ldx [%l7 + %l4], %l4\n" \
|
|
" stx %i5, [%sp + " __S(STACK_BIAS) " + 22*8]\n" \
|
|
" add %sp, " __S(STACK_BIAS) " + 23*8, %i1\n" \
|
|
" add %i1, %l6, %i2\n" \
|
|
" ldx [%l4], %l5\n" \
|
|
" /* Copy down argv. */\n" \
|
|
"12: ldx [%i2], %i3\n" \
|
|
" add %i2, 8, %i2\n" \
|
|
" stx %i3, [%i1]\n" \
|
|
" brnz,pt %i3, 12b\n" \
|
|
" add %i1, 8, %i1\n" \
|
|
" sub %l5, %l6, %l5\n" \
|
|
" /* Copy down envp. */\n" \
|
|
"13: ldx [%i2], %i3\n" \
|
|
" add %i2, 8, %i2\n" \
|
|
" stx %i3, [%i1]\n" \
|
|
" brnz,pt %i3, 13b\n" \
|
|
" add %i1, 8, %i1\n" \
|
|
" /* Copy down auxiliary table. */\n" \
|
|
"14: ldx [%i2], %i3\n" \
|
|
" ldx [%i2 + 8], %i4\n" \
|
|
" add %i2, 16, %i2\n" \
|
|
" stx %i3, [%i1]\n" \
|
|
" stx %i4, [%i1 + 8]\n" \
|
|
" brnz,pt %i3, 14b\n" \
|
|
" add %i1, 16, %i1\n" \
|
|
" stx %l5, [%l4]\n" \
|
|
" /* %o0 = _dl_loaded, %o1 = argc, %o2 = argv, %o3 = envp. */\n" \
|
|
"2: sethi %hi(_rtld_local), %o0\n" \
|
|
" add %sp, " __S(STACK_BIAS) " + 23*8, %o2\n" \
|
|
" orcc %o0, %lo(_rtld_local), %o0\n" \
|
|
" sllx %i5, 3, %o3\n" \
|
|
" ldx [%l7 + %o0], %o0\n" \
|
|
" add %o3, 8, %o3\n" \
|
|
" mov %i5, %o1\n" \
|
|
" add %o2, %o3, %o3\n" \
|
|
" call _dl_init_internal\n" \
|
|
" ldx [%o0], %o0\n" \
|
|
" /* Pass our finalizer function to the user in %g1. */\n" \
|
|
" sethi %hi(_dl_fini), %g1\n" \
|
|
" or %g1, %lo(_dl_fini), %g1\n" \
|
|
" ldx [%l7 + %g1], %g1\n" \
|
|
" /* Jump to the user's entry point and deallocate the extra stack we got. */\n" \
|
|
" jmp %l0\n" \
|
|
" add %sp, 6*8, %sp\n" \
|
|
" .size _dl_start_user, . - _dl_start_user\n" \
|
|
" .previous\n");
|