Upstream-Status: Backport [from debian] Signed-off-by: Hongxu Jia Index: b/backends/mips_init.c =================================================================== --- /dev/null +++ b/backends/mips_init.c @@ -0,0 +1,59 @@ +/* Initialization of mips specific backend library. + Copyright (C) 2006 Red Hat, Inc. + This file is part of Red Hat elfutils. + + Red Hat elfutils is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by the + Free Software Foundation; version 2 of the License. + + Red Hat elfutils is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License along + with Red Hat elfutils; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. + + Red Hat elfutils is an included package of the Open Invention Network. + An included package of the Open Invention Network is a package for which + Open Invention Network licensees cross-license their patents. No patent + license is granted, either expressly or impliedly, by designation as an + included package. Should you wish to participate in the Open Invention + Network licensing program, please visit www.openinventionnetwork.com + . */ + +#ifdef HAVE_CONFIG_H +# include +#endif + +#define BACKEND mips_ +#define RELOC_PREFIX R_MIPS_ +#include "libebl_CPU.h" + +/* This defines the common reloc hooks based on mips_reloc.def. */ +#include "common-reloc.c" + +const char * +mips_init (Elf *elf __attribute__ ((unused)), + GElf_Half machine __attribute__ ((unused)), + Ebl *eh, + size_t ehlen) +{ + /* Check whether the Elf_BH object has a sufficent size. */ + if (ehlen < sizeof (Ebl)) + return NULL; + + /* We handle it. */ + if (machine == EM_MIPS) + eh->name = "MIPS R3000 big-endian"; + else if (machine == EM_MIPS_RS3_LE) + eh->name = "MIPS R3000 little-endian"; + + mips_init_reloc (eh); + HOOK (eh, reloc_simple_type); + HOOK (eh, return_value_location); + HOOK (eh, register_info); + + return MODVERSION; +} Index: b/backends/mips_regs.c =================================================================== --- /dev/null +++ b/backends/mips_regs.c @@ -0,0 +1,104 @@ +/* Register names and numbers for MIPS DWARF. + Copyright (C) 2006 Red Hat, Inc. + This file is part of Red Hat elfutils. + + Red Hat elfutils is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by the + Free Software Foundation; version 2 of the License. + + Red Hat elfutils is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License along + with Red Hat elfutils; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. + + Red Hat elfutils is an included package of the Open Invention Network. + An included package of the Open Invention Network is a package for which + Open Invention Network licensees cross-license their patents. No patent + license is granted, either expressly or impliedly, by designation as an + included package. Should you wish to participate in the Open Invention + Network licensing program, please visit www.openinventionnetwork.com + . */ + +#ifdef HAVE_CONFIG_H +# include +#endif + +#include +#include + +#define BACKEND mips_ +#include "libebl_CPU.h" + +ssize_t +mips_register_info (Ebl *ebl __attribute__((unused)), + int regno, char *name, size_t namelen, + const char **prefix, const char **setname, + int *bits, int *type) +{ + if (name == NULL) + return 66; + + if (regno < 0 || regno > 65 || namelen < 4) + return -1; + + *prefix = "$"; + + if (regno < 32) + { + *setname = "integer"; + *type = DW_ATE_signed; + *bits = 32; + if (regno < 32 + 10) + { + name[0] = regno + '0'; + namelen = 1; + } + else + { + name[0] = (regno / 10) + '0'; + name[1] = (regno % 10) + '0'; + namelen = 2; + } + } + else if (regno < 64) + { + *setname = "FPU"; + *type = DW_ATE_float; + *bits = 32; + name[0] = 'f'; + if (regno < 32 + 10) + { + name[1] = (regno - 32) + '0'; + namelen = 2; + } + else + { + name[1] = (regno - 32) / 10 + '0'; + name[2] = (regno - 32) % 10 + '0'; + namelen = 3; + } + } + else if (regno == 64) + { + *type = DW_ATE_signed; + *bits = 32; + name[0] = 'h'; + name[1] = 'i'; + namelen = 2; + } + else + { + *type = DW_ATE_signed; + *bits = 32; + name[0] = 'l'; + name[1] = 'o'; + namelen = 2; + } + + name[namelen++] = '\0'; + return namelen; +} Index: b/backends/mips_reloc.def =================================================================== --- /dev/null +++ b/backends/mips_reloc.def @@ -0,0 +1,79 @@ +/* List the relocation types for mips. -*- C -*- + Copyright (C) 2006 Red Hat, Inc. + This file is part of Red Hat elfutils. + + Red Hat elfutils is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by the + Free Software Foundation; version 2 of the License. + + Red Hat elfutils is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License along + with Red Hat elfutils; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. + + Red Hat elfutils is an included package of the Open Invention Network. + An included package of the Open Invention Network is a package for which + Open Invention Network licensees cross-license their patents. No patent + license is granted, either expressly or impliedly, by designation as an + included package. Should you wish to participate in the Open Invention + Network licensing program, please visit www.openinventionnetwork.com + . */ + +/* NAME, REL|EXEC|DYN */ + +RELOC_TYPE (NONE, 0) +RELOC_TYPE (16, 0) +RELOC_TYPE (32, 0) +RELOC_TYPE (REL32, 0) +RELOC_TYPE (26, 0) +RELOC_TYPE (HI16, 0) +RELOC_TYPE (LO16, 0) +RELOC_TYPE (GPREL16, 0) +RELOC_TYPE (LITERAL, 0) +RELOC_TYPE (GOT16, 0) +RELOC_TYPE (PC16, 0) +RELOC_TYPE (CALL16, 0) +RELOC_TYPE (GPREL32, 0) + +RELOC_TYPE (SHIFT5, 0) +RELOC_TYPE (SHIFT6, 0) +RELOC_TYPE (64, 0) +RELOC_TYPE (GOT_DISP, 0) +RELOC_TYPE (GOT_PAGE, 0) +RELOC_TYPE (GOT_OFST, 0) +RELOC_TYPE (GOT_HI16, 0) +RELOC_TYPE (GOT_LO16, 0) +RELOC_TYPE (SUB, 0) +RELOC_TYPE (INSERT_A, 0) +RELOC_TYPE (INSERT_B, 0) +RELOC_TYPE (DELETE, 0) +RELOC_TYPE (HIGHER, 0) +RELOC_TYPE (HIGHEST, 0) +RELOC_TYPE (CALL_HI16, 0) +RELOC_TYPE (CALL_LO16, 0) +RELOC_TYPE (SCN_DISP, 0) +RELOC_TYPE (REL16, 0) +RELOC_TYPE (ADD_IMMEDIATE, 0) +RELOC_TYPE (PJUMP, 0) +RELOC_TYPE (RELGOT, 0) +RELOC_TYPE (JALR, 0) +RELOC_TYPE (TLS_DTPMOD32, 0) +RELOC_TYPE (TLS_DTPREL32, 0) +RELOC_TYPE (TLS_DTPMOD64, 0) +RELOC_TYPE (TLS_DTPREL64, 0) +RELOC_TYPE (TLS_GD, 0) +RELOC_TYPE (TLS_LDM, 0) +RELOC_TYPE (TLS_DTPREL_HI16, 0) +RELOC_TYPE (TLS_DTPREL_LO16, 0) +RELOC_TYPE (TLS_GOTTPREL, 0) +RELOC_TYPE (TLS_TPREL32, 0) +RELOC_TYPE (TLS_TPREL64, 0) +RELOC_TYPE (TLS_TPREL_HI16, 0) +RELOC_TYPE (TLS_TPREL_LO16, 0) + +#define NO_COPY_RELOC 1 +#define NO_RELATIVE_RELOC 1 Index: b/backends/mips_retval.c =================================================================== --- /dev/null +++ b/backends/mips_retval.c @@ -0,0 +1,321 @@ +/* Function return value location for Linux/mips ABI. + Copyright (C) 2005 Red Hat, Inc. + This file is part of Red Hat elfutils. + + Red Hat elfutils is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by the + Free Software Foundation; version 2 of the License. + + Red Hat elfutils is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License along + with Red Hat elfutils; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. + + Red Hat elfutils is an included package of the Open Invention Network. + An included package of the Open Invention Network is a package for which + Open Invention Network licensees cross-license their patents. No patent + license is granted, either expressly or impliedly, by designation as an + included package. Should you wish to participate in the Open Invention + Network licensing program, please visit www.openinventionnetwork.com + . */ + +#ifdef HAVE_CONFIG_H +# include +#endif + +#include +#include +#include +#include + +#include "../libebl/libeblP.h" +#include "../libdw/libdwP.h" + +#define BACKEND mips_ +#include "libebl_CPU.h" + +/* The ABI of the file. Also see EF_MIPS_ABI2 above. */ +#define EF_MIPS_ABI 0x0000F000 + +/* The original o32 abi. */ +#define E_MIPS_ABI_O32 0x00001000 + +/* O32 extended to work on 64 bit architectures */ +#define E_MIPS_ABI_O64 0x00002000 + +/* EABI in 32 bit mode */ +#define E_MIPS_ABI_EABI32 0x00003000 + +/* EABI in 64 bit mode */ +#define E_MIPS_ABI_EABI64 0x00004000 + +/* All the possible MIPS ABIs. */ +enum mips_abi + { + MIPS_ABI_UNKNOWN = 0, + MIPS_ABI_N32, + MIPS_ABI_O32, + MIPS_ABI_N64, + MIPS_ABI_O64, + MIPS_ABI_EABI32, + MIPS_ABI_EABI64, + MIPS_ABI_LAST + }; + +/* Find the mips ABI of the current file */ +enum mips_abi find_mips_abi(Elf *elf) +{ + GElf_Ehdr ehdr_mem; + GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_mem); + + if (ehdr == NULL) + return MIPS_ABI_LAST; + + GElf_Word elf_flags = ehdr->e_flags; + + /* Check elf_flags to see if it specifies the ABI being used. */ + switch ((elf_flags & EF_MIPS_ABI)) + { + case E_MIPS_ABI_O32: + return MIPS_ABI_O32; + case E_MIPS_ABI_O64: + return MIPS_ABI_O64; + case E_MIPS_ABI_EABI32: + return MIPS_ABI_EABI32; + case E_MIPS_ABI_EABI64: + return MIPS_ABI_EABI64; + default: + if ((elf_flags & EF_MIPS_ABI2)) + return MIPS_ABI_N32; + } + + /* GCC creates a pseudo-section whose name describes the ABI. */ + size_t shstrndx; + if (elf_getshdrstrndx (elf, &shstrndx) < 0) + return MIPS_ABI_LAST; + + const char *name; + Elf_Scn *scn = NULL; + while ((scn = elf_nextscn (elf, scn)) != NULL) + { + GElf_Shdr shdr_mem; + GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem); + if (shdr == NULL) + return MIPS_ABI_LAST; + + name = elf_strptr (elf, shstrndx, shdr->sh_name) ?: ""; + if (strncmp (name, ".mdebug.", 8) != 0) + continue; + + if (strcmp (name, ".mdebug.abi32") == 0) + return MIPS_ABI_O32; + else if (strcmp (name, ".mdebug.abiN32") == 0) + return MIPS_ABI_N32; + else if (strcmp (name, ".mdebug.abi64") == 0) + return MIPS_ABI_N64; + else if (strcmp (name, ".mdebug.abiO64") == 0) + return MIPS_ABI_O64; + else if (strcmp (name, ".mdebug.eabi32") == 0) + return MIPS_ABI_EABI32; + else if (strcmp (name, ".mdebug.eabi64") == 0) + return MIPS_ABI_EABI64; + else + return MIPS_ABI_UNKNOWN; + } + + return MIPS_ABI_UNKNOWN; +} + +unsigned int +mips_abi_regsize (enum mips_abi abi) +{ + switch (abi) + { + case MIPS_ABI_EABI32: + case MIPS_ABI_O32: + return 4; + case MIPS_ABI_N32: + case MIPS_ABI_N64: + case MIPS_ABI_O64: + case MIPS_ABI_EABI64: + return 8; + case MIPS_ABI_UNKNOWN: + case MIPS_ABI_LAST: + default: + return 0; + } +} + + +/* $v0 or pair $v0, $v1 */ +static const Dwarf_Op loc_intreg_o32[] = + { + { .atom = DW_OP_reg2 }, { .atom = DW_OP_piece, .number = 4 }, + { .atom = DW_OP_reg3 }, { .atom = DW_OP_piece, .number = 4 }, + }; + +static const Dwarf_Op loc_intreg[] = + { + { .atom = DW_OP_reg2 }, { .atom = DW_OP_piece, .number = 8 }, + { .atom = DW_OP_reg3 }, { .atom = DW_OP_piece, .number = 8 }, + }; +#define nloc_intreg 1 +#define nloc_intregpair 4 + +/* $f0 (float), or pair $f0, $f1 (double). + * f2/f3 are used for COMPLEX (= 2 doubles) returns in Fortran */ +static const Dwarf_Op loc_fpreg_o32[] = + { + { .atom = DW_OP_regx, .number = 32 }, { .atom = DW_OP_piece, .number = 4 }, + { .atom = DW_OP_regx, .number = 33 }, { .atom = DW_OP_piece, .number = 4 }, + { .atom = DW_OP_regx, .number = 34 }, { .atom = DW_OP_piece, .number = 4 }, + { .atom = DW_OP_regx, .number = 35 }, { .atom = DW_OP_piece, .number = 4 }, + }; + +/* $f0, or pair $f0, $f2. */ +static const Dwarf_Op loc_fpreg[] = + { + { .atom = DW_OP_regx, .number = 32 }, { .atom = DW_OP_piece, .number = 8 }, + { .atom = DW_OP_regx, .number = 34 }, { .atom = DW_OP_piece, .number = 8 }, + }; +#define nloc_fpreg 1 +#define nloc_fpregpair 4 +#define nloc_fpregquad 8 + +/* The return value is a structure and is actually stored in stack space + passed in a hidden argument by the caller. But, the compiler + helpfully returns the address of that space in $v0. */ +static const Dwarf_Op loc_aggregate[] = + { + { .atom = DW_OP_breg2, .number = 0 } + }; +#define nloc_aggregate 1 + +int +mips_return_value_location (Dwarf_Die *functypedie, const Dwarf_Op **locp) +{ + /* First find the ABI used by the elf object */ + enum mips_abi abi = find_mips_abi(functypedie->cu->dbg->elf); + + /* Something went seriously wrong while trying to figure out the ABI */ + if (abi == MIPS_ABI_LAST) + return -1; + + /* We couldn't identify the ABI, but the file seems valid */ + if (abi == MIPS_ABI_UNKNOWN) + return -2; + + /* Can't handle EABI variants */ + if ((abi == MIPS_ABI_EABI32) || (abi == MIPS_ABI_EABI64)) + return -2; + + unsigned int regsize = mips_abi_regsize (abi); + if (!regsize) + return -2; + + /* Start with the function's type, and get the DW_AT_type attribute, + which is the type of the return value. */ + + Dwarf_Attribute attr_mem; + Dwarf_Attribute *attr = dwarf_attr_integrate (functypedie, DW_AT_type, &attr_mem); + if (attr == NULL) + /* The function has no return value, like a `void' function in C. */ + return 0; + + Dwarf_Die die_mem; + Dwarf_Die *typedie = dwarf_formref_die (attr, &die_mem); + int tag = dwarf_tag (typedie); + + /* Follow typedefs and qualifiers to get to the actual type. */ + while (tag == DW_TAG_typedef + || tag == DW_TAG_const_type || tag == DW_TAG_volatile_type + || tag == DW_TAG_restrict_type) + { + attr = dwarf_attr_integrate (typedie, DW_AT_type, &attr_mem); + typedie = dwarf_formref_die (attr, &die_mem); + tag = dwarf_tag (typedie); + } + + switch (tag) + { + case -1: + return -1; + + case DW_TAG_subrange_type: + if (! dwarf_hasattr_integrate (typedie, DW_AT_byte_size)) + { + attr = dwarf_attr_integrate (typedie, DW_AT_type, &attr_mem); + typedie = dwarf_formref_die (attr, &die_mem); + tag = dwarf_tag (typedie); + } + /* Fall through. */ + + case DW_TAG_base_type: + case DW_TAG_enumeration_type: + case DW_TAG_pointer_type: + case DW_TAG_ptr_to_member_type: + { + Dwarf_Word size; + if (dwarf_formudata (dwarf_attr_integrate (typedie, DW_AT_byte_size, + &attr_mem), &size) != 0) + { + if (tag == DW_TAG_pointer_type || tag == DW_TAG_ptr_to_member_type) + size = regsize; + else + return -1; + } + if (tag == DW_TAG_base_type) + { + Dwarf_Word encoding; + if (dwarf_formudata (dwarf_attr_integrate (typedie, DW_AT_encoding, + &attr_mem), &encoding) != 0) + return -1; + +#define ABI_LOC(loc, regsize) ((regsize) == 4 ? (loc ## _o32) : (loc)) + + if (encoding == DW_ATE_float) + { + *locp = ABI_LOC(loc_fpreg, regsize); + if (size <= regsize) + return nloc_fpreg; + + if (size <= 2*regsize) + return nloc_fpregpair; + + if (size <= 4*regsize && abi == MIPS_ABI_O32) + return nloc_fpregquad; + + goto aggregate; + } + } + *locp = ABI_LOC(loc_intreg, regsize); + if (size <= regsize) + return nloc_intreg; + if (size <= 2*regsize) + return nloc_intregpair; + + /* Else fall through. Shouldn't happen though (at least with gcc) */ + } + + case DW_TAG_structure_type: + case DW_TAG_class_type: + case DW_TAG_union_type: + case DW_TAG_array_type: + aggregate: + /* XXX TODO: Can't handle structure return with other ABI's yet :-/ */ + if ((abi != MIPS_ABI_O32) && (abi != MIPS_ABI_O64)) + return -2; + + *locp = loc_aggregate; + return nloc_aggregate; + } + + /* XXX We don't have a good way to return specific errors from ebl calls. + This value means we do not understand the type, but it is well-formed + DWARF and might be valid. */ + return -2; +} Index: b/backends/mips_symbol.c =================================================================== --- /dev/null +++ b/backends/mips_symbol.c @@ -0,0 +1,52 @@ +/* MIPS specific symbolic name handling. + Copyright (C) 2002, 2003, 2005 Red Hat, Inc. + This file is part of Red Hat elfutils. + Written by Jakub Jelinek , 2002. + + Red Hat elfutils is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by the + Free Software Foundation; version 2 of the License. + + Red Hat elfutils is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License along + with Red Hat elfutils; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. + + Red Hat elfutils is an included package of the Open Invention Network. + An included package of the Open Invention Network is a package for which + Open Invention Network licensees cross-license their patents. No patent + license is granted, either expressly or impliedly, by designation as an + included package. Should you wish to participate in the Open Invention + Network licensing program, please visit www.openinventionnetwork.com + . */ + +#ifdef HAVE_CONFIG_H +# include +#endif + +#include +#include + +#define BACKEND mips_ +#include "libebl_CPU.h" + +/* Check for the simple reloc types. */ +Elf_Type +mips_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type) +{ + switch (type) + { + case R_MIPS_16: + return ELF_T_HALF; + case R_MIPS_32: + return ELF_T_WORD; + case R_MIPS_64: + return ELF_T_XWORD; + default: + return ELF_T_NUM; + } +} Index: b/libebl/eblopenbackend.c =================================================================== --- a/libebl/eblopenbackend.c +++ b/libebl/eblopenbackend.c @@ -71,6 +71,8 @@ static const struct { "sparc", "elf_sparc", "sparc", 5, EM_SPARC, 0, 0 }, { "sparc", "elf_sparcv8plus", "sparc", 5, EM_SPARC32PLUS, 0, 0 }, { "s390", "ebl_s390", "s390", 4, EM_S390, 0, 0 }, + { "mips", "elf_mips", "mips", 4, EM_MIPS, 0, 0 }, + { "mips", "elf_mipsel", "mipsel", 4, EM_MIPS_RS3_LE, 0, 0 }, { "m32", "elf_m32", "m32", 3, EM_M32, 0, 0 }, { "m68k", "elf_m68k", "m68k", 4, EM_68K, ELFCLASS32, ELFDATA2MSB }, Index: b/backends/Makefile.am =================================================================== --- a/backends/Makefile.am +++ b/backends/Makefile.am @@ -33,12 +33,12 @@ AM_CPPFLAGS += -I$(top_srcdir)/libebl -I modules = i386 sh x86_64 ia64 alpha arm aarch64 sparc ppc ppc64 s390 \ - tilegx m68k bpf parisc + tilegx m68k bpf parisc mips libebl_pic = libebl_i386_pic.a libebl_sh_pic.a libebl_x86_64_pic.a \ libebl_ia64_pic.a libebl_alpha_pic.a libebl_arm_pic.a \ libebl_aarch64_pic.a libebl_sparc_pic.a libebl_ppc_pic.a \ libebl_ppc64_pic.a libebl_s390_pic.a libebl_tilegx_pic.a \ - libebl_m68k_pic.a libebl_bpf_pic.a libebl_parisc_pic.a + libebl_m68k_pic.a libebl_bpf_pic.a libebl_parisc_pic.a libebl_mips_pic.a noinst_LIBRARIES = $(libebl_pic) noinst_DATA = $(libebl_pic:_pic.a=.so) @@ -132,6 +132,10 @@ parisc_SRCS = parisc_init.c parisc_symbo libebl_parisc_pic_a_SOURCES = $(parisc_SRCS) am_libebl_parisc_pic_a_OBJECTS = $(parisc_SRCS:.c=.os) +mips_SRCS = mips_init.c mips_symbol.c mips_regs.c mips_retval.c +libebl_mips_pic_a_SOURCES = $(mips_SRCS) +am_libebl_mips_pic_a_OBJECTS = $(mips_SRCS:.c=.os) + libebl_%.so libebl_%.map: libebl_%_pic.a $(libelf) $(libdw) @rm -f $(@:.so=.map) $(AM_V_at)echo 'ELFUTILS_$(PACKAGE_VERSION) { global: $*_init; local: *; };' \