Joseph Myers
54b7103af4
Fix microMIPS glibc by avoiding hardcoded instruction length assumptions.
...
microMIPS is a variable-length encoding of the MIPS32 instruction set
(plus some extra instructions). As it supports almost all of MIPS32,
assembly sources in glibc do not generally need changes to work with
microMIPS, but dl-trampoline.c contains some code with a hardcoded
assumption that three instructions occupy twelve bytes. This patch
fixes this code for microMIPS by using the difference between two
labels to let the assembler calculate the relevant length.
2010-01-29 01:54:52 +00:00
Daniel Jacobowitz
63fb881a04
2008-10-01 Mark Shinwell <shinwell@codesourcery.com>
...
Daniel Jacobowitz <dan@codesourcery.com>
Richard Sandiford <rdsandiford@googlemail.com>
* sysdeps/mips/dl-dtprocnum.h (DT_MIPS_NUM): Redefine.
* sysdeps/mips/dl-lookup.c: New.
* sysdeps/mips/do-lookup.h: New.
* sysdeps/mips/dl-machine.h (ELF_MACHINE_NO_PLT): Remove
definition.
(STO_MIPS_PLT, R_MIPS_COPY, R_MIPS_JUMP_SLOT, DT_MIPS_PLTGOT): Define
if needed.
(ELF_MACHINE_JMP_SLOT): Alter definition and update comment.
(elf_machine_type_class): Likewise.
(ELF_MACHINE_PLT_REL): Define.
(elf_machine_fixup_plt): New.
(elf_machine_plt_value): New.
(elf_machine_reloc): Handle jump slot and copy relocations.
(elf_machine_lazy_rel): Point relocation place at PLT if
required.
(RESOLVE_GOTSYM): Take a relocation type argument.
(elf_machine_got_rel): Bind lazy stubs directly to their target if
!lazy. Skip lazy binding for PLT symbols.
(elf_machine_runtime_setup): Fill in .got.plt header.
* sysdeps/mips/dl-trampoline.c (IFNEWABI): New macro.
(ELF_DL_PLT_FRAME_SIZE, ELF_DL_PLT_SAVE_ARG_REGS,
ELF_DL_PLT_RESTORE_ARG_REGS): Define.
(_dl_runtime_pltresolve): New.
* sysdeps/mips/bits/linkmap.h: New file.
* sysdeps/mips/tls-macros.h: Load $gp as required. Merge 32-bit and
64-bit versions.
* sysdeps/unix/sysv/linux/mips/mips32/sysdep.h (SYSCALL_ERROR_LABEL):
Delete definition.
* sysdeps/unix/sysv/linux/mips/nptl/sysdep-cancel.h (PSEUDO_CPLOAD,
PSEUDO_ERRJMP, PSEUDO_SAVEGP, PSEUDO_LOADGP): Define.
(PSEUDO): Use them. Move outside __PIC__.
(PSEUDO_JMP): New.
(CENABLE, CDISABLE): Use it.
2008-10-01 13:28:14 +00:00
