diff options
Diffstat (limited to 'libasm')
35 files changed, 4374 insertions, 0 deletions
diff --git a/libasm/ChangeLog b/libasm/ChangeLog new file mode 100644 index 00000000..630696d7 --- /dev/null +++ b/libasm/ChangeLog @@ -0,0 +1,23 @@ +2004-09-25 Ulrich Drepper <drepper@redhat.com> + + * asm_error.c: Make compile with gcc 4.0. + +2004-01-20 Ulrich Drepper <drepper@redhat.com> + + * Makefile.am: Support building with mudflap. + +2004-01-18 Ulrich Drepper <drepper@redhat.com> + + * libasmP.h (_): Use elfutils domain. + +2004-01-17 Ulrich Drepper <drepper@redhat.com> + + * Makefile.am: Support building with mudflap. + +2003-08-13 Ulrich Drepper <drepper@redhat.com> + + * Makefile.in: Depend on libebl.a, not libebl.so. + +2003-08-11 Ulrich Drepper <drepper@redhat.com> + + * Moved to CVS archive. diff --git a/libasm/Makefile b/libasm/Makefile new file mode 100644 index 00000000..cf50cdbe --- /dev/null +++ b/libasm/Makefile @@ -0,0 +1,593 @@ +# Makefile.in generated by automake 1.9.2 from Makefile.am. +# libasm/Makefile. Generated from Makefile.in by configure. + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004 Free Software Foundation, Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + + + + + +SOURCES = $(libasm_a_SOURCES) $(libasm_pic_a_SOURCES) $(libasm_so_SOURCES) + +srcdir = . +top_srcdir = .. + +pkgdatadir = $(datadir)/elfutils +pkglibdir = $(libdir)/elfutils +pkgincludedir = $(includedir)/elfutils +top_builddir = .. +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +INSTALL = /usr/bin/install -c +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c 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libasm.so.$(VERSION) $(DESTDIR)$(libdir)/libasm.so + +uninstall: uninstall-am + rm -f $(DESTDIR)$(libdir)/libasm-$(PACKAGE_VERSION).so + rm -f $(DESTDIR)$(libdir)/libasm.so.$(VERSION) + rm -f $(DESTDIR)$(libdir)/libasm.so + rmdir --ignore-fail-on-non-empty $(DESTDIR)$(includedir)/elfutils + +.PSEUDO: lint +lint: + $(LINT) $(DEFS) $(INCLUDES) $(GCC_INCLUDE) -f $(top_srcdir)/splint.rc \ + $(addprefix $(srcdir)/,$(libelf_la_SOURCES)) +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/libasm/Makefile.am b/libasm/Makefile.am new file mode 100644 index 00000000..9ba304d1 --- /dev/null +++ b/libasm/Makefile.am @@ -0,0 +1,92 @@ +## Process this file with automake to create Makefile.in +## Configure input file for elfutils. +## +## Copyright (C) 2002, 2004 Red Hat, Inc. +## +## This program is Open Source software; you can redistribute it and/or +## modify it under the terms of the Open Software License version 1.0 as +## published by the Open Source Initiative. +## +## You should have received a copy of the Open Software License along +## with this program; if not, you may obtain a copy of the Open Software +## License version 1.0 from http://www.opensource.org/licenses/osl.php or +## by writing the Open Source Initiative c/o Lawrence Rosen, Esq., +## 3001 King Ranch Road, Ukiah, CA 95482. +## +DEFS = -D_GNU_SOURCE -DHAVE_CONFIG_H +if MUDFLAP +AM_CFLAGS = -Wall +else +AM_CFLAGS = -Wall -Werror +endif +INCLUDES = -I. -I$(srcdir) -I.. -I$(top_srcdir)/libelf -I$(top_srcdir)/libebl \ + -I$(top_srcdir)/lib +GCC_INCLUDE = -I$(shell $(CC) -print-file-name=include) +VERSION = 1 + +LINT = splint + +lib_LIBRARIES = libasm.a +if !MUDFLAP +noinst_LIBRARIES = libasm_pic.a +noinst_PROGRAMS = $(noinst_LIBRARIES:_pic.a=.so) +endif +euincludedir = ${includedir}/elfutils +euinclude_HEADERS = libasm.h + +libasm_a_SOURCES = asm_begin.c asm_abort.c asm_end.c asm_error.c \ + asm_getelf.c asm_newscn.c asm_newscn_ingrp.c \ + asm_newsubscn.c asm_newsym.c asm_newcomsym.c \ + asm_newabssym.c \ + asm_newscngrp.c asm_scngrp_newsignature.c \ + asm_fill.c asm_align.c asm_addstrz.c \ + asm_addint8.c asm_adduint8.c \ + asm_addint16.c asm_adduint16.c \ + asm_addint32.c asm_adduint32.c \ + asm_addint64.c asm_adduint64.c \ + asm_adduleb128.c asm_addsleb128.c \ + symbolhash.c + +if !MUDFLAP +libasm_pic_a_SOURCES = +am_libasm_pic_a_OBJECTS = $(libasm_a_SOURCES:.c=.os) + +libasm_so_SOURCES = +libasm.so: libasm_pic.a libasm.map + $(CC) -shared -o $@ -Wl,--whole-archive,$<,--no-whole-archive \ + -Wl,--version-script,$(srcdir)/libasm.map,--no-undefined \ + -Wl,--soname,$@.$(VERSION) \ + ../libebl/libebl.a ../libelf/libelf.so + ln -fs $@ $@.$(VERSION) + + +%.os: %.c %.o + if $(COMPILE) -c -o $@ -fpic -DPIC -DSHARED -MT $@ -MD -MP \ + -MF "$(DEPDIR)/$*.Tpo" `test -f '$<' || echo '$(srcdir)/'`$<; \ + then cat "$(DEPDIR)/$*.Tpo" >> "$(DEPDIR)/$*.Po"; \ + rm -f "$(DEPDIR)/$*.Tpo"; \ + else rm -f "$(DEPDIR)/$*.Tpo"; exit 1; \ + fi + +install: install-am libasm.so + $(mkinstalldirs) $(DESTDIR)$(libdir) + $(INSTALL_PROGRAM) libasm.so $(DESTDIR)$(libdir)/libasm-$(PACKAGE_VERSION).so + ln -fs libasm-$(PACKAGE_VERSION).so $(DESTDIR)$(libdir)/libasm.so.$(VERSION) + ln -fs libasm.so.$(VERSION) $(DESTDIR)$(libdir)/libasm.so + +uninstall: uninstall-am + rm -f $(DESTDIR)$(libdir)/libasm-$(PACKAGE_VERSION).so + rm -f $(DESTDIR)$(libdir)/libasm.so.$(VERSION) + rm -f $(DESTDIR)$(libdir)/libasm.so + rmdir --ignore-fail-on-non-empty $(DESTDIR)$(includedir)/elfutils +endif + +.PSEUDO: lint +lint: + $(LINT) $(DEFS) $(INCLUDES) $(GCC_INCLUDE) -f $(top_srcdir)/splint.rc \ + $(addprefix $(srcdir)/,$(libelf_la_SOURCES)) + +noinst_HEADERS = libasmP.h symbolhash.h +EXTRA_DIST = libasm.map + +CLEANFILES = $(am_libasm_pic_a_OBJECTS) diff --git a/libasm/Makefile.in b/libasm/Makefile.in new file mode 100644 index 00000000..9683d4d2 --- /dev/null +++ b/libasm/Makefile.in @@ -0,0 +1,593 @@ +# 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+@MUDFLAP_FALSE@ rm -f $(DESTDIR)$(libdir)/libasm-$(PACKAGE_VERSION).so +@MUDFLAP_FALSE@ rm -f $(DESTDIR)$(libdir)/libasm.so.$(VERSION) +@MUDFLAP_FALSE@ rm -f $(DESTDIR)$(libdir)/libasm.so +@MUDFLAP_FALSE@ rmdir --ignore-fail-on-non-empty $(DESTDIR)$(includedir)/elfutils + +.PSEUDO: lint +lint: + $(LINT) $(DEFS) $(INCLUDES) $(GCC_INCLUDE) -f $(top_srcdir)/splint.rc \ + $(addprefix $(srcdir)/,$(libelf_la_SOURCES)) +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/libasm/asm_abort.c b/libasm/asm_abort.c new file mode 100644 index 00000000..f35757ca --- /dev/null +++ b/libasm/asm_abort.c @@ -0,0 +1,45 @@ +/* Abort operations on the assembler context, free all resources. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <stdlib.h> +#include <unistd.h> + +#include <libasmP.h> +#include <libelf.h> + + +int +asm_abort (ctx) + AsmCtx_t *ctx; +{ + if (ctx == NULL) + /* Something went wrong earlier. */ + return -1; + + if (likely (! ctx->textp)) + /* First free the ELF file. We don't care about the result. */ + (void) elf_end (ctx->out.elf); + + /* Now close the temporary file and remove it. */ + (void) unlink (ctx->tmp_fname); + + /* Free the resources. */ + __libasm_finictx (ctx); + + return 0; +} diff --git a/libasm/asm_addint16.c b/libasm/asm_addint16.c new file mode 100644 index 00000000..98125171 --- /dev/null +++ b/libasm/asm_addint16.c @@ -0,0 +1,17 @@ +/* Add integer to a section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#define SIZE 16 + +#include "asm_addint8.c" diff --git a/libasm/asm_addint32.c b/libasm/asm_addint32.c new file mode 100644 index 00000000..05ac3d25 --- /dev/null +++ b/libasm/asm_addint32.c @@ -0,0 +1,17 @@ +/* Add integer to a section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#define SIZE 32 + +#include "asm_addint8.c" diff --git a/libasm/asm_addint64.c b/libasm/asm_addint64.c new file mode 100644 index 00000000..f9d93f80 --- /dev/null +++ b/libasm/asm_addint64.c @@ -0,0 +1,17 @@ +/* Add integer to a section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#define SIZE 64 + +#include "asm_addint8.c" diff --git a/libasm/asm_addint8.c b/libasm/asm_addint8.c new file mode 100644 index 00000000..35d9bf57 --- /dev/null +++ b/libasm/asm_addint8.c @@ -0,0 +1,105 @@ +/* Add integer to a section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <byteswap.h> +#include <endian.h> +#include <inttypes.h> +#include <string.h> + +#include <libasmP.h> + +#ifndef SIZE +# define SIZE 8 +#endif + +#define FCT(size) _FCT(size) +#define _FCT(size) asm_addint##size +#define TYPE(size) _TYPE(size) +#define _TYPE(size) int##size##_t +#define BSWAP(size) _BSWAP(size) +#define _BSWAP(size) bswap_##size + + +int +FCT(SIZE) (asmscn, num) + AsmScn_t *asmscn; + TYPE(SIZE) num; +{ + if (asmscn == NULL) + return -1; + + if (asmscn->type == SHT_NOBITS && unlikely (num != 0)) + { + __libasm_seterrno (ASM_E_TYPE); + return -1; + } + + if (unlikely (asmscn->ctx->textp)) + { + // XXX Needs to use backend specified pseudo-ops + if (SIZE == 8) + printf ("\t.byte\t%" PRId8 "\n", (int8_t) num); + else if (SIZE == 16) + printf ("\t.value\t%" PRId16 "\n", (int16_t) num); + else if (SIZE == 32) + printf ("\t.long\t%" PRId32 "\n", (int32_t) num); + else + { + // XXX This is not necessary for 64-bit machines + bool is_leb = (elf_getident (asmscn->ctx->out.elf, NULL)[EI_DATA] + == ELFDATA2LSB); + + printf ("\t.long\t%" PRId32 "\n\t.long\t%" PRId32 "\n", + (int32_t) (is_leb + ? num % 0x100000000ll : num / 0x100000000ll), + (int32_t) (is_leb + ? num / 0x100000000ll : num % 0x100000000ll)); + } + } + else + { +#if SIZE > 8 + bool is_leb = (elf_getident (asmscn->ctx->out.elf, NULL)[EI_DATA] + == ELFDATA2LSB); +#endif + TYPE(SIZE) var = num; + + /* Make sure we have enough room. */ + if (__libasm_ensure_section_space (asmscn, SIZE / 8) != 0) + return -1; + +#if SIZE > 8 + if ((BYTE_ORDER == LITTLE_ENDIAN && !is_leb) + || (BYTE_ORDER == BIG_ENDIAN && is_leb)) + var = BSWAP(SIZE) (var); +#endif + + /* Copy the variable value. */ + if (likely (asmscn->type == SHT_NOBITS)) + memcpy (&asmscn->content->data[asmscn->content->len], &var, SIZE / 8); + + /* Adjust the pointer in the data buffer. */ + asmscn->content->len += SIZE / 8; + + /* Increment the offset in the (sub)section. */ + asmscn->offset += SIZE / 8; + } + + return 0; +} +INTDEF(FCT(SIZE)) diff --git a/libasm/asm_addsleb128.c b/libasm/asm_addsleb128.c new file mode 100644 index 00000000..0661b36e --- /dev/null +++ b/libasm/asm_addsleb128.c @@ -0,0 +1,84 @@ +/* Add signed little endian base 128 integer to a section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <inttypes.h> +#include <string.h> + +#include <libasmP.h> + + +int +asm_addsleb128 (asmscn, num) + AsmScn_t *asmscn; + int32_t num; +{ + if (asmscn == NULL) + return -1; + + if (asmscn->type == SHT_NOBITS && unlikely (num != 0)) + { + __libasm_seterrno (ASM_E_TYPE); + return -1; + } + + if (unlikely (asmscn->ctx->textp)) + printf ("\t.sleb128\t%" PRId32 "\n", num); + else + { + char tmpbuf[(sizeof (num) * 8 + 6) / 7]; + char *dest = tmpbuf; + uint32_t byte; + int32_t endval = num >> 31; + + if (num == 0) + byte = 0; + else + while (1) + { + byte = num & 0x7f; + + num >>= 7; + if (num == endval) + /* This is the last byte. */ + break; + + *dest++ = byte | 0x80; + } + + *dest++ = byte; + + /* Number of bytes produced. */ + size_t nbytes = dest - tmpbuf; + + /* Make sure we have enough room. */ + if (__libasm_ensure_section_space (asmscn, nbytes) != 0) + return -1; + + /* Copy the bytes. */ + if (likely (asmscn->type != SHT_NOBITS)) + memcpy (&asmscn->content->data[asmscn->content->len], tmpbuf, nbytes); + + /* Adjust the pointer in the data buffer. */ + asmscn->content->len += nbytes; + + /* Increment the offset in the (sub)section. */ + asmscn->offset += nbytes; + } + + return 0; +} diff --git a/libasm/asm_addstrz.c b/libasm/asm_addstrz.c new file mode 100644 index 00000000..e183b0b5 --- /dev/null +++ b/libasm/asm_addstrz.c @@ -0,0 +1,113 @@ +/* Add string to a section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <ctype.h> +#include <stdio.h> +#include <string.h> + +#include <libasmP.h> + + +/* Add zero terminated string STR of size LEN to (sub)section ASMSCN. */ +int +asm_addstrz (asmscn, str, len) + AsmScn_t *asmscn; + const char *str; + size_t len; +{ + if (asmscn == NULL) + return -1; + + if (unlikely (asmscn->type == SHT_NOBITS)) + { + if (len == 0) + { + if (str[0] != '\0') + { + __libasm_seterrno (ASM_E_TYPE); + return -1; + } + } + else + { + size_t cnt; + + for (cnt = 0; cnt < len; ++cnt) + if (str[cnt] != '\0') + { + __libasm_seterrno (ASM_E_TYPE); + return -1; + } + } + } + + if (len == 0) + len = strlen (str) + 1; + + if (unlikely (asmscn->ctx->textp)) + { + bool nextline = true; + + do + { + if (nextline) + { + fputs ("\t.string\t\"", asmscn->ctx->out.file); + nextline = false; + } + + if (*str == '\0') + fputs ("\\000", asmscn->ctx->out.file); + else if (! isascii (*str)) + fprintf (asmscn->ctx->out.file, "\\%03o", + (unsigned int) *((unsigned char *)str)); + else if (*str == '\\') + fputs ("\\\\", asmscn->ctx->out.file); + else if (*str == '\n') + { + fputs ("\\n\"", asmscn->ctx->out.file); + nextline = true; + } + else + fputc (*str, asmscn->ctx->out.file); + + ++str; + } + while (--len > 0 && (len > 1 || *str != '\0')); + + if (! nextline) + fputs ("\"\n", asmscn->ctx->out.file); + } + else + { + /* Make sure there is enough room. */ + if (__libasm_ensure_section_space (asmscn, len) != 0) + return -1; + + /* Copy the string. */ + memcpy (&asmscn->content->data[asmscn->content->len], str, len); + + /* Adjust the pointer in the data buffer. */ + asmscn->content->len += len; + + /* Increment the offset in the (sub)section. */ + asmscn->offset += len; + } + + return 0; +} diff --git a/libasm/asm_adduint16.c b/libasm/asm_adduint16.c new file mode 100644 index 00000000..8c1e698f --- /dev/null +++ b/libasm/asm_adduint16.c @@ -0,0 +1,17 @@ +/* Add unsigned integer to a section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#define SIZE 16 + +#include "asm_adduint8.c" diff --git a/libasm/asm_adduint32.c b/libasm/asm_adduint32.c new file mode 100644 index 00000000..a2257954 --- /dev/null +++ b/libasm/asm_adduint32.c @@ -0,0 +1,17 @@ +/* Add unsigned integer to a section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#define SIZE 32 + +#include "asm_adduint8.c" diff --git a/libasm/asm_adduint64.c b/libasm/asm_adduint64.c new file mode 100644 index 00000000..edda4d38 --- /dev/null +++ b/libasm/asm_adduint64.c @@ -0,0 +1,17 @@ +/* Add unsigned integer to a section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#define SIZE 64 + +#include "asm_adduint8.c" diff --git a/libasm/asm_adduint8.c b/libasm/asm_adduint8.c new file mode 100644 index 00000000..7bfb3414 --- /dev/null +++ b/libasm/asm_adduint8.c @@ -0,0 +1,41 @@ +/* Add unsigned integer to a section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <libasmP.h> + +#ifndef SIZE +# define SIZE 8 +#endif + +#define UFCT(size) _UFCT(size) +#define _UFCT(size) asm_adduint##size +#define FCT(size) _FCT(size) +#define _FCT(size) asm_addint##size +#define UTYPE(size) _UTYPE(size) +#define _UTYPE(size) uint##size##_t +#define TYPE(size) _TYPE(size) +#define _TYPE(size) int##size##_t + + +int +UFCT(SIZE) (asmscn, num) + AsmScn_t *asmscn; + UTYPE(SIZE) num; +{ + return INTUSE(FCT(SIZE)) (asmscn, (TYPE(SIZE)) num); +} diff --git a/libasm/asm_adduleb128.c b/libasm/asm_adduleb128.c new file mode 100644 index 00000000..521d265a --- /dev/null +++ b/libasm/asm_adduleb128.c @@ -0,0 +1,80 @@ +/* Add integer to a section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <inttypes.h> +#include <string.h> + +#include "libasmP.h" + + +int +asm_adduleb128 (asmscn, num) + AsmScn_t *asmscn; + uint32_t num; +{ + if (asmscn == NULL) + return -1; + + if (asmscn->type == SHT_NOBITS && unlikely (num != 0)) + { + __libasm_seterrno (ASM_E_TYPE); + return -1; + } + + if (unlikely (asmscn->ctx->textp)) + printf ("\t.uleb128\t%" PRIu32 "\n", num); + else + { + char tmpbuf[(sizeof (num) * 8 + 6) / 7]; + char *dest = tmpbuf; + uint32_t byte; + + while (1) + { + byte = num & 0x7f; + + num >>= 7; + if (num == 0) + /* This is the last byte. */ + break; + + *dest++ = byte | 0x80; + } + + *dest++ = byte; + + /* Number of bytes produced. */ + size_t nbytes = dest - tmpbuf; + + /* Make sure we have enough room. */ + if (__libasm_ensure_section_space (asmscn, nbytes) != 0) + return -1; + + /* Copy the bytes. */ + if (likely (asmscn->type != SHT_NOBITS)) + memcpy (&asmscn->content->data[asmscn->content->len], tmpbuf, nbytes); + + /* Adjust the pointer in the data buffer. */ + asmscn->content->len += nbytes; + + /* Increment the offset in the (sub)section. */ + asmscn->offset += nbytes; + } + + return 0; +} diff --git a/libasm/asm_align.c b/libasm/asm_align.c new file mode 100644 index 00000000..e7350924 --- /dev/null +++ b/libasm/asm_align.c @@ -0,0 +1,147 @@ +/* Align section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <stdlib.h> +#include <sys/param.h> + +#include <libasmP.h> +#include <system.h> + + +int +asm_align (asmscn, value) + AsmScn_t *asmscn; + GElf_Word value; +{ + if (asmscn == NULL) + /* An earlier error. */ + return -1; + + /* The alignment value must be a power of two. */ + if (unlikely (! powerof2 (value))) + { + __libasm_seterrno (ASM_E_INVALID); + return -1; + } + + rwlock_wrlock (asmscn->ctx->lock); + + int result = 0; + + /* Fillbytes necessary? */ + if ((asmscn->offset & (value - 1)) != 0) + { + /* Add fillbytes. */ + size_t cnt; + size_t byteptr; + + cnt = value - (asmscn->offset & (value - 1)); + + /* Ensure there is enough room to add the fill bytes. */ + result = __libasm_ensure_section_space (asmscn, cnt); + if (result != 0) + goto out; + + /* Fill in the bytes. We align the pattern according to the + current offset. */ + byteptr = asmscn->offset % asmscn->pattern->len; + + /* Update the total size. */ + asmscn->offset += cnt; + + do + { + asmscn->content->data[asmscn->content->len++] + = asmscn->pattern->bytes[byteptr++]; + + if (byteptr == asmscn->pattern->len) + byteptr = 0; + } + while (--cnt > 0); + } + + /* Remember the maximum alignment for this subsection. */ + if (asmscn->max_align < value) + { + asmscn->max_align = value; + + /* Update the parent as well (if it exists). */ + if (asmscn->subsection_id != 0) + { + rwlock_wrlock (asmscn->data.up->ctx->lock); + + if (asmscn->data.up->max_align < value) + asmscn->data.up->max_align = value; + + rwlock_unlock (asmscn->data.up->ctx->lock); + } + } + + out: + rwlock_unlock (asmscn->ctx->lock); + + return result; +} + + +/* Ensure there are at least LEN bytes available in the output buffer + for ASMSCN. */ +int +__libasm_ensure_section_space (asmscn, len) + AsmScn_t *asmscn; + size_t len; +{ + /* The blocks with the section content are kept in a circular + single-linked list. */ + size_t size; + + if (asmscn->content == NULL) + { + /* This is the first block. */ + size = MAX (2 * len, 960); + + asmscn->content = (struct AsmData *) malloc (sizeof (struct AsmData) + + size); + if (asmscn->content == NULL) + return -1; + + asmscn->content->next = asmscn->content; + } + else + { + struct AsmData *newp; + + if (asmscn->content->maxlen - asmscn->content->len >= len) + /* Nothing to do, there is enough space. */ + return 0; + + size = MAX (2 *len, MIN (32768, 2 * asmscn->offset)); + + newp = (struct AsmData *) malloc (sizeof (struct AsmData) + size); + if (newp == NULL) + return -1; + + newp->next = asmscn->content->next; + asmscn->content = asmscn->content->next = newp; + } + + asmscn->content->len = 0; + asmscn->content->maxlen = size; + + return 0; +} diff --git a/libasm/asm_begin.c b/libasm/asm_begin.c new file mode 100644 index 00000000..3896f78f --- /dev/null +++ b/libasm/asm_begin.c @@ -0,0 +1,151 @@ +/* Create descriptor for assembling. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <assert.h> +#include <errno.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <gelf.h> +#include "libasmP.h" +#include <system.h> + + +static AsmCtx_t * +prepare_text_output (AsmCtx_t *result) +{ + return result; +} + + +static AsmCtx_t * +prepare_binary_output (AsmCtx_t *result, int machine, int klass, int data) +{ + GElf_Ehdr *ehdr; + GElf_Ehdr ehdr_mem; + + /* Create the ELF descriptor for the file. */ + result->out.elf = elf_begin (result->fd, ELF_C_WRITE_MMAP, NULL); + if (result->out.elf == NULL) + { + err_libelf: + unlink (result->tmp_fname); + close (result->fd); + free (result); + __libasm_seterrno (ASM_E_LIBELF); + return NULL; + } + + /* Create the ELF header for the output file. */ + if (gelf_newehdr (result->out.elf, klass) == 0) + goto err_libelf; + + ehdr = gelf_getehdr (result->out.elf, &ehdr_mem); + /* If this failed we are in trouble. */ + assert (ehdr != NULL); + + /* We create an object file. */ + ehdr->e_type = ET_REL; + /* Set the ELF version. */ + ehdr->e_version = EV_CURRENT; + + /* Use the machine value the user provided. */ + ehdr->e_machine = machine; + /* Same for the class and endianness. */ + ehdr->e_ident[EI_CLASS] = klass; + ehdr->e_ident[EI_DATA] = data; + + memcpy (&ehdr->e_ident[EI_MAG0], ELFMAG, SELFMAG); + + /* Write the ELF header information back. */ + (void) gelf_update_ehdr (result->out.elf, ehdr); + + /* No section so far. */ + result->section_list = NULL; + + /* Initialize the hash table. */ + asm_symbol_tab_init (&result->symbol_tab, 67); + result->nsymbol_tab = 0; + /* And the string tables. */ + result->section_strtab = ebl_strtabinit (true); + result->symbol_strtab = ebl_strtabinit (true); + + /* We have no section groups so far. */ + result->groups = NULL; + result->ngroups = 0; + + return result; +} + + +AsmCtx_t * +asm_begin (fname, textp, machine, klass, data) + const char *fname; + bool textp; + int machine; + int klass; + int data; +{ + size_t fname_len = strlen (fname); + AsmCtx_t *result; + + + /* First order of business: find the appropriate backend. If it + does not exist we don't have to look further. */ + // XXX + + /* Create the file descriptor. We do not generate the output file + right away. Instead we create a temporary file in the same + directory which, if everything goes alright, will replace a + possibly existing file with the given name. */ + result = (AsmCtx_t *) malloc (sizeof (AsmCtx_t) + 2 * fname_len + 9); + if (result == NULL) + return NULL; + + /* Initialize the lock. */ + rwlock_init (result->lock); + + /* Create the name of the temporary file. */ + result->fname = stpcpy (mempcpy (result->tmp_fname, fname, fname_len), + ".XXXXXX") + 1; + memcpy (result->fname, fname, fname_len + 1); + + /* Create the temporary file. */ + result->fd = mkstemp (result->tmp_fname); + if (result->fd == -1) + { + int save_errno = errno; + free (result); + __libasm_seterrno (ASM_E_CANNOT_CREATE); + errno = save_errno; + return NULL; + } + + /* Initialize the counter for temporary symbols. */ + result->tempsym_count = 0; + + /* Now we differentiate between textual and binary output. */ + result->textp = textp; + if (textp) + result = prepare_text_output (result); + else + result = prepare_binary_output (result, machine, klass, data); + + return result; +} diff --git a/libasm/asm_end.c b/libasm/asm_end.c new file mode 100644 index 00000000..01326a11 --- /dev/null +++ b/libasm/asm_end.c @@ -0,0 +1,597 @@ +/* Finalize operations on the assembler context, free all resources. + Copyright (C) 2002, 2003 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <assert.h> +#include <error.h> +#include <libintl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/stat.h> + +#include <libasmP.h> +#include <libelf.h> +#include <system.h> + + +static int +text_end (AsmCtx_t *ctx) +{ + // XXX Does anything have to be done? + return 0; +} + + +static int +binary_end (AsmCtx_t *ctx) +{ + void *symtab = NULL; + struct Ebl_Strent *symscn_strent = NULL; + struct Ebl_Strent *strscn_strent = NULL; + struct Ebl_Strent *xndxscn_strent = NULL; + Elf_Scn *shstrscn; + struct Ebl_Strent *shstrscn_strent; + size_t shstrscnndx; + size_t symscnndx = 0; + size_t strscnndx = 0; + size_t xndxscnndx = 0; + Elf_Data *data; + Elf_Data *shstrtabdata; + Elf_Data *strtabdata = NULL; + Elf_Data *xndxdata = NULL; + GElf_Shdr shdr_mem; + GElf_Shdr *shdr; + GElf_Ehdr ehdr_mem; + GElf_Ehdr *ehdr; + AsmScn_t *asmscn; + int result = 0; + + /* Iterate over the created sections and compute the offsets of the + various subsections and fill in the content. */ + for (asmscn = ctx->section_list; asmscn != NULL; asmscn = asmscn->allnext) + { +#if 0 + Elf_Scn *scn = elf_getscn (ctx->out.elf, asmscn->data.main.scnndx); +#else + Elf_Scn *scn = asmscn->data.main.scn; +#endif + off_t offset = 0; + AsmScn_t *asmsubscn = asmscn; + + do + { + struct AsmData *content = asmsubscn->content; + bool first = true; + + offset = ((offset + asmsubscn->max_align - 1) + & ~(asmsubscn->max_align - 1)); + + /* Update the offset for this subsection. This field now + stores the offset of the first by in this subsection. */ + asmsubscn->offset = offset; + + /* Note that the content list is circular. */ + if (content != NULL) + do + { + Elf_Data *newdata = elf_newdata (scn); + + if (newdata == NULL) + error (EXIT_FAILURE, 0, + _("cannot create section for output file: %s"), + elf_errmsg (-1)); + + newdata->d_buf = content->data; + newdata->d_type = ELF_T_BYTE; + newdata->d_size = content->len; + newdata->d_off = offset; + newdata->d_align = first ? asmsubscn->max_align : 1; + + offset += content->len; + } + while ((content = content->next) != asmsubscn->content); + } + while ((asmsubscn = asmsubscn->subnext) != NULL); + } + + + /* Create the symbol table if necessary. */ + if (ctx->nsymbol_tab > 0) + { + Elf_Scn *symscn; + Elf_Scn *strscn; + AsmSym_t *sym; + int ptr_local; + int ptr_nonlocal; + GElf_Sym syment; + uint32_t *xshndx = NULL; + void *runp; + + /* Create the symbol table and string table section names. */ + symscn_strent = ebl_strtabadd (ctx->section_strtab, ".symtab", 8); + strscn_strent = ebl_strtabadd (ctx->section_strtab, ".strtab", 8); + + /* Create the symbol string table section. */ + strscn = elf_newscn (ctx->out.elf); + strtabdata = elf_newdata (strscn); + shdr = gelf_getshdr (strscn, &shdr_mem); + if (strtabdata == NULL || shdr == NULL) + error (EXIT_FAILURE, 0, _("cannot create section for output file: %s"), + elf_errmsg (-1)); + strscnndx = elf_ndxscn (strscn); + + ebl_strtabfinalize (ctx->symbol_strtab, strtabdata); + + shdr->sh_type = SHT_STRTAB; + assert (shdr->sh_entsize == 0); + + (void) gelf_update_shdr (strscn, shdr); + + /* Create the symbol table section. */ + symscn = elf_newscn (ctx->out.elf); + data = elf_newdata (symscn); + shdr = gelf_getshdr (symscn, &shdr_mem); + if (data == NULL || shdr == NULL) + error (EXIT_FAILURE, 0, _("cannot create section for output file: %s"), + elf_errmsg (-1)); + symscnndx = elf_ndxscn (symscn); + + /* We know how many symbols there will be in the symbol table. */ + data->d_size = gelf_fsize (ctx->out.elf, ELF_T_SYM, + ctx->nsymbol_tab + 1, EV_CURRENT); + symtab = malloc (data->d_size); + if (symtab == NULL) + return -1; + data->d_buf = symtab; + data->d_type = ELF_T_SYM; + data->d_off = 0; + + /* Clear the first entry. */ + memset (&syment, '\0', sizeof (syment)); + (void) gelf_update_sym (data, 0, &syment); + + /* Iterate over the symbol table. */ + runp = NULL; + ptr_local = 1; /* Start with index 1; zero remains unused. */ + ptr_nonlocal = ctx->nsymbol_tab; + while ((sym = asm_symbol_tab_iterate (&ctx->symbol_tab, &runp)) != NULL) + if (asm_emit_symbol_p (ebl_string (sym->strent))) + { + int ptr; + Elf32_Word ndx; + Elf_Scn *scn; + + assert (ptr_local <= ptr_nonlocal); + + syment.st_name = ebl_strtaboffset (sym->strent); + syment.st_info = GELF_ST_INFO (sym->binding, sym->type); + syment.st_other = 0; + syment.st_value = sym->scn->offset + sym->offset; + syment.st_size = sym->size; + + /* Add local symbols at the beginning, the other from + the end. */ + ptr = sym->binding == STB_LOCAL ? ptr_local++ : ptr_nonlocal--; + + /* Determine the section index. We have to handle the + overflow correctly. */ + scn = (sym->scn->subsection_id == 0 + ? sym->scn->data.main.scn + : sym->scn->data.up->data.main.scn); + + if (unlikely (scn == ASM_ABS_SCN)) + ndx = SHN_ABS; + else if (unlikely (scn == ASM_COM_SCN)) + ndx = SHN_COMMON; + else if (unlikely ((ndx = elf_ndxscn (scn)) >= SHN_LORESERVE)) + { + if (unlikely (xshndx == NULL)) + { + /* The extended section index section does not yet + exist. */ + Elf_Scn *xndxscn; + size_t symscnndx = elf_ndxscn (symscn); + + xndxscn = elf_newscn (ctx->out.elf); + xndxdata = elf_newdata (xndxscn); + shdr = gelf_getshdr (xndxscn, &shdr_mem); + if (xndxdata == NULL || shdr == NULL) + error (EXIT_FAILURE, 0, _("\ +cannot create extended section index table: %s"), + elf_errmsg (-1)); + xndxscnndx = elf_ndxscn (xndxscn); + + shdr->sh_type = SHT_SYMTAB_SHNDX; + shdr->sh_entsize = sizeof (Elf32_Word); + shdr->sh_addralign = sizeof (Elf32_Word); + shdr->sh_link = symscnndx; + + (void) gelf_update_shdr (xndxscn, shdr); + + xndxscn_strent = ebl_strtabadd (ctx->section_strtab, + ".symtab_shndx", 14); + + /* Note that using 'elf32_fsize' instead of + 'gelf_fsize' here is correct. */ + xndxdata->d_size = elf32_fsize (ELF_T_WORD, + ctx->nsymbol_tab + 1, + EV_CURRENT); + xshndx = xndxdata->d_buf = calloc (1, xndxdata->d_size); + if (xshndx == NULL) + return -1; + /* Using ELF_T_WORD here relies on the fact that the + 32- and 64-bit types are the same size. */ + xndxdata->d_type = ELF_T_WORD; + xndxdata->d_off = 0; + } + + /* Store the real section index in the extended setion + index table. */ + assert ((size_t) ptr < ctx->nsymbol_tab + 1); + xshndx[ptr] = ndx; + + /* And signal that this happened. */ + ndx = SHN_XINDEX; + } + syment.st_shndx = ndx; + + /* Remember where we put the symbol. */ + sym->symidx = ptr; + + (void) gelf_update_sym (data, ptr, &syment); + } + + assert (ptr_local == ptr_nonlocal + 1); + + shdr->sh_type = SHT_SYMTAB; + shdr->sh_link = strscnndx; + shdr->sh_info = ptr_local; + shdr->sh_entsize = gelf_fsize (ctx->out.elf, ELF_T_SYM, 1, EV_CURRENT); + shdr->sh_addralign = gelf_fsize (ctx->out.elf, ELF_T_ADDR, 1, + EV_CURRENT); + + (void) gelf_update_shdr (symscn, shdr); + } + + + /* Create the section header string table section and fill in the + references in the section headers. */ + shstrscn = elf_newscn (ctx->out.elf); + shstrtabdata = elf_newdata (shstrscn); + shdr = gelf_getshdr (shstrscn, &shdr_mem); + if (shstrscn == NULL || shstrtabdata == NULL || shdr == NULL) + error (EXIT_FAILURE, 0, _("cannot create section for output file: %s"), + elf_errmsg (-1)); + + + /* Add the name of the section header string table. */ + shstrscn_strent = ebl_strtabadd (ctx->section_strtab, ".shstrtab", 10); + + ebl_strtabfinalize (ctx->section_strtab, shstrtabdata); + + shdr->sh_type = SHT_STRTAB; + assert (shdr->sh_entsize == 0); + shdr->sh_name = ebl_strtaboffset (shstrscn_strent); + + (void) gelf_update_shdr (shstrscn, shdr); + + + /* Create the section groups. */ + if (ctx->groups != NULL) + { + AsmScnGrp_t *runp = ctx->groups->next; + + do + { + Elf_Scn *scn; + GElf_Shdr shdr_mem; + GElf_Shdr *shdr; + Elf_Data *data; + Elf32_Word *grpdata; + + scn = runp->scn; + assert (scn != NULL); + shdr = gelf_getshdr (scn, &shdr_mem); + assert (shdr != NULL); + + data = elf_newdata (scn); + if (data == NULL) + error (EXIT_FAILURE, 0, + _("cannot create section group for output file: %s"), + elf_errmsg (-1)); + + /* It is correct to use 'elf32_fsize' instead of 'gelf_fsize' + here. */ + data->d_size = elf32_fsize (ELF_T_WORD, runp->nmembers + 1, + EV_CURRENT); + grpdata = data->d_buf = malloc (data->d_size); + if (grpdata == NULL) + return -1; + data->d_type = ELF_T_WORD; + data->d_off = 0; + data->d_align = elf32_fsize (ELF_T_WORD, 1, EV_CURRENT); + + /* The first word of the section is filled with the flag word. */ + *grpdata++ = runp->flags; + + if (runp->members != NULL) + { + AsmScn_t *member = runp->members->data.main.next_in_group; + + do + { + /* Only sections, not subsections, can be registered + as member of a group. The subsections get + automatically included. */ + assert (member->subsection_id == 0); + + *grpdata++ = elf_ndxscn (member->data.main.scn); + } + while ((member = member->data.main.next_in_group) + != runp->members->data.main.next_in_group); + } + + /* Construct the section header. */ + shdr->sh_name = ebl_strtaboffset (runp->strent); + shdr->sh_type = SHT_GROUP; + shdr->sh_flags = 0; + shdr->sh_link = symscnndx; + /* If the user did not specify a signature we use the initial + empty symbol in the symbol table as the signature. */ + shdr->sh_info = (runp->signature != NULL + ? runp->signature->symidx : 0); + + (void) gelf_update_shdr (scn, shdr); + } + while ((runp = runp->next) != ctx->groups->next); + } + + + /* Add the name to the symbol section. */ + if (likely (symscnndx != 0)) + { + Elf_Scn *scn = elf_getscn (ctx->out.elf, symscnndx); + + shdr = gelf_getshdr (scn, &shdr_mem); + + shdr->sh_name = ebl_strtaboffset (symscn_strent); + + (void) gelf_update_shdr (scn, shdr); + + + /* Add the name to the string section. */ + assert (strscnndx != 0); + scn = elf_getscn (ctx->out.elf, strscnndx); + + shdr = gelf_getshdr (scn, &shdr_mem); + + shdr->sh_name = ebl_strtaboffset (strscn_strent); + + (void) gelf_update_shdr (scn, shdr); + + + /* Add the name to the extended symbol index section. */ + if (xndxscnndx != 0) + { + scn = elf_getscn (ctx->out.elf, xndxscnndx); + + shdr = gelf_getshdr (scn, &shdr_mem); + + shdr->sh_name = ebl_strtaboffset (xndxscn_strent); + + (void) gelf_update_shdr (scn, shdr); + } + } + + + /* Iterate over the created sections and fill in the names. */ + for (asmscn = ctx->section_list; asmscn != NULL; asmscn = asmscn->allnext) + { + shdr = gelf_getshdr (asmscn->data.main.scn, &shdr_mem); + /* This better should not fail. */ + assert (shdr != NULL); + + shdr->sh_name = ebl_strtaboffset (asmscn->data.main.strent); + + /* We now know the maximum alignment. */ + shdr->sh_addralign = asmscn->max_align; + + (void) gelf_update_shdr (asmscn->data.main.scn, shdr); + } + + /* Put the reference to the section header string table in the ELF + header. */ + ehdr = gelf_getehdr (ctx->out.elf, &ehdr_mem); + assert (ehdr != NULL); + + shstrscnndx = elf_ndxscn (shstrscn); + if (unlikely (shstrscnndx > SHN_HIRESERVE) + || unlikely (shstrscnndx == SHN_XINDEX)) + { + /* The index of the section header string sectio is too large. */ + Elf_Scn *scn = elf_getscn (ctx->out.elf, 0); + + /* Get the header for the zeroth section. */ + shdr = gelf_getshdr (scn, &shdr_mem); + /* This better does not fail. */ + assert (shdr != NULL); + + /* The sh_link field of the zeroth section header contains the value. */ + shdr->sh_link = shstrscnndx; + + (void) gelf_update_shdr (scn, shdr); + + /* This is the sign for the overflow. */ + ehdr->e_shstrndx = SHN_XINDEX; + } + else + ehdr->e_shstrndx = elf_ndxscn (shstrscn); + + gelf_update_ehdr (ctx->out.elf, ehdr); + + /* Write out the ELF file. */ + if (unlikely (elf_update (ctx->out.elf, ELF_C_WRITE_MMAP)) < 0) + { + __libasm_seterrno (ASM_E_LIBELF); + result = -1; + } + + /* We do not need the section header and symbol string tables anymore. */ + free (shstrtabdata->d_buf); + if (strtabdata != NULL) + free (strtabdata->d_buf); + /* We might have allocated the extended symbol table index. */ + if (xndxdata != NULL) + free (xndxdata->d_buf); + + /* Free section groups memory. */ + AsmScnGrp_t *scngrp = ctx->groups; + if (scngrp != NULL) + do + free (elf_getdata (scngrp->scn, NULL)->d_buf); + while ((scngrp = scngrp->next) != ctx->groups); + + /* Finalize the ELF handling. */ + if (unlikely (elf_end (ctx->out.elf)) != 0) + { + __libasm_seterrno (ASM_E_LIBELF); + result = -1; + } + + /* Free the temporary resources. */ + free (symtab); + + return result; +} + + +int +asm_end (ctx) + AsmCtx_t *ctx; +{ + int result; + + if (ctx == NULL) + /* Something went wrong earlier. */ + return -1; + + result = unlikely (ctx->textp) ? text_end (ctx) : binary_end (ctx); + if (result != 0) + return result; + + /* Make the new file globally readable and user/group-writable. */ + if (fchmod (ctx->fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH) != 0) + { + __libasm_seterrno (ASM_E_CANNOT_CHMOD); + return -1; + } + + /* Rename output file. */ + if (rename (ctx->tmp_fname, ctx->fname) != 0) + { + __libasm_seterrno (ASM_E_CANNOT_RENAME); + return -1; + } + + /* Free the resources. */ + __libasm_finictx (ctx); + + return 0; +} + + +static void +free_section (AsmScn_t *scnp) +{ + void *oldp; + + if (scnp->subnext != NULL) + free_section (scnp->subnext); + + struct AsmData *data = scnp->content; + if (data != NULL) + do + { + oldp = data; + data = data->next; + free (oldp); + } + while (oldp != scnp->content); + + free (scnp); +} + + +void +__libasm_finictx (ctx) + AsmCtx_t *ctx; +{ + /* Iterate through section table and free individual entries. */ + AsmScn_t *scn = ctx->section_list; + while (scn != NULL) + { + AsmScn_t *oldp = scn; + scn = scn->allnext; + free_section (oldp); + } + + /* Free the resources of the symbol table. */ + void *runp = NULL; + AsmSym_t *sym; + while ((sym = asm_symbol_tab_iterate (&ctx->symbol_tab, &runp)) != NULL) + free (sym); + asm_symbol_tab_free (&ctx->symbol_tab); + + + /* Free section groups. */ + AsmScnGrp_t *scngrp = ctx->groups; + if (scngrp != NULL) + do + { + AsmScnGrp_t *oldp = scngrp; + + scngrp = scngrp->next; + free (oldp); + } + while (scngrp != ctx->groups); + + + if (unlikely (ctx->textp)) + { + /* Close the stream. */ + fclose (ctx->out.file); + } + else + { + /* Close the output file. */ + /* XXX We should test for errors here but what would we do if we'd + find any. */ + (void) close (ctx->fd); + + /* And the string tables. */ + ebl_strtabfree (ctx->section_strtab); + ebl_strtabfree (ctx->symbol_strtab); + } + + /* Initialize the lock. */ + rwlock_fini (ctx->lock); + + /* Finally free the data structure. */ + free (ctx); +} diff --git a/libasm/asm_error.c b/libasm/asm_error.c new file mode 100644 index 00000000..9d2d81ed --- /dev/null +++ b/libasm/asm_error.c @@ -0,0 +1,183 @@ +/* Error handling in libasm. + Copyright (C) 2002, 2004 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <libintl.h> +#include <stdbool.h> +#include <stdlib.h> + +#include "libasmP.h" + + +/* This is the key for the thread specific memory. */ +static tls_key_t key; + +/* The error number. Used in non-threaded programs. */ +static int global_error; +static bool threaded; +/* We need to initialize the thread-specific data. */ +once_define (static, once); + +/* The initialization and destruction functions. */ +static void init (void); +static void free_key_mem (void *mem); + + +int +asm_errno (void) +{ + int result; + + /* If we have not yet initialized the buffer do it now. */ + once_execute (once, init); + + if (threaded) + { + /* We have a key. Use it to get the thread-specific buffer. */ + int *buffer = getspecific (key); + if (buffer == NULL) + { + /* No buffer allocated so far. */ + buffer = (int *) malloc (sizeof (int)); + if (buffer == NULL) + /* No more memory available. We use the static buffer. */ + buffer = &global_error; + + setspecific (key, buffer); + + *buffer = 0; + } + + result = *buffer; + *buffer = ASM_E_NOERROR; + return result; + } + + result = global_error; + global_error = ASM_E_NOERROR; + return result; +} + + +void +__libasm_seterrno (value) + int value; +{ + /* If we have not yet initialized the buffer do it now. */ + once_execute (once, init); + + if (threaded) + { + /* We have a key. Use it to get the thread-specific buffer. */ + int *buffer = getspecific (key); + if (buffer == NULL) + { + /* No buffer allocated so far. */ + buffer = malloc (sizeof (int)); + if (buffer == NULL) + /* No more memory available. We use the static buffer. */ + buffer = &global_error; + + setspecific (key, buffer); + } + + *buffer = value; + } + + global_error = value; +} + + +/* Return the appropriate message for the error. */ +static const char *msgs[ASM_E_NUM] = +{ + [ASM_E_NOERROR] = N_("no error"), + [ASM_E_NOMEM] = N_("out of memory"), + [ASM_E_CANNOT_CREATE] = N_("cannot create output file"), + [ASM_E_INVALID] = N_("invalid parameter"), + [ASM_E_CANNOT_CHMOD] = N_("cannot change mode of output file"), + [ASM_E_CANNOT_RENAME] = N_("cannot rename output file"), + [ASM_E_DUPLSYM] = N_("duplicate symbol"), + [ASM_E_TYPE] = N_("invalid section type for operation") +}; + +const char * +asm_errmsg (error) + int error; +{ + int last_error; + + /* If we have not yet initialized the buffer do it now. */ + once_execute (once, init); + + if ((error == 0 || error == -1) && threaded) + { + /* We have a key. Use it to get the thread-specific buffer. */ + int *buffer = (int *) getspecific (key); + if (buffer == NULL) + { + /* No buffer allocated so far. */ + buffer = (int *) malloc (sizeof (int)); + if (buffer == NULL) + /* No more memory available. We use the static buffer. */ + buffer = &global_error; + + setspecific (key, buffer); + *buffer = 0; + } + + last_error = *buffer; + } + else + last_error = global_error; + + if (error < -1) + return _("Unknown error"); + if (error == 0 && last_error == 0) + /* No error. */ + return NULL; + + if (error != -1) + last_error = error; + + if (last_error == ASM_E_LIBELF) + return elf_errmsg (-1); + + return _(msgs[last_error]); +} + + +/* Free the thread specific data, this is done if a thread terminates. */ +static void +free_key_mem (void *mem) +{ + free (mem); + setspecific (key, NULL); +} + + +/* Initialize the key for the global variable. */ +static void +init (void) +{ + // XXX Screw you, gcc4, the unused function attribute does not work. + __asm ("" :: "r" (free_key_mem)); + + if (key_create (&key, free_key_mem) == 0) + /* Creating the key succeeded. */ + threaded = true; +} diff --git a/libasm/asm_fill.c b/libasm/asm_fill.c new file mode 100644 index 00000000..67b64417 --- /dev/null +++ b/libasm/asm_fill.c @@ -0,0 +1,62 @@ +/* Determine fill pattern for a section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <stdlib.h> +#include <string.h> + +#include <libasmP.h> +#include <system.h> + + +int +asm_fill (asmscn, bytes, len) + AsmScn_t *asmscn; + void *bytes; + size_t len; +{ + struct FillPattern *pattern; + struct FillPattern *old_pattern; + + if (asmscn == NULL) + /* Some earlier error. */ + return -1; + + if (bytes == NULL) + /* Use the default pattern. */ + pattern = (struct FillPattern *) __libasm_default_pattern; + else + { + /* Allocate appropriate memory. */ + pattern = (struct FillPattern *) malloc (sizeof (struct FillPattern) + + len); + if (pattern == NULL) + return -1; + + pattern->len = len; + memcpy (pattern->bytes, bytes, len); + } + + old_pattern = asmscn->pattern; + asmscn->pattern = pattern; + + /* Free the old data structure if we have allocated it. */ + if (old_pattern != __libasm_default_pattern) + free (old_pattern); + + return 0; +} diff --git a/libasm/asm_getelf.c b/libasm/asm_getelf.c new file mode 100644 index 00000000..3bbb0d90 --- /dev/null +++ b/libasm/asm_getelf.c @@ -0,0 +1,29 @@ +/* Return ELF descriptor associated with the assembler context. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <stddef.h> + +#include <libasmP.h> + + +Elf * +asm_getelf (ctx) + AsmCtx_t *ctx; +{ + return ctx != NULL ? ctx->out.elf : NULL; +} diff --git a/libasm/asm_newabssym.c b/libasm/asm_newabssym.c new file mode 100644 index 00000000..fba46f0f --- /dev/null +++ b/libasm/asm_newabssym.c @@ -0,0 +1,121 @@ +/* Create new ABS symbol. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <inttypes.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <libasmP.h> +#include <system.h> + + +/* Object for special COMMON section. */ +static const AsmScn_t __libasm_abs_scn = + { + .data = { + .main = { + .scn = ASM_ABS_SCN + } + } + }; + + +AsmSym_t * +asm_newabssym (ctx, name, size, value, type, binding) + AsmCtx_t *ctx; + const char *name; + GElf_Xword size; + GElf_Addr value; + int type; + int binding; +{ + AsmSym_t *result; + + if (ctx == NULL) + /* Something went wrong before. */ + return NULL; + + /* Common symbols are public. Therefore the user must provide a + name. */ + if (name == NULL) + { + __libasm_seterrno (ASM_E_INVALID); + return NULL; + } + + rwlock_wrlock (ctx->lock); + + result = (AsmSym_t *) malloc (sizeof (AsmSym_t)); + if (result == NULL) + return NULL; + + result->scn = (AsmScn_t *) &__libasm_abs_scn; + result->size = size; + result->type = type; + result->binding = binding; + result->symidx = 0; + result->strent = ebl_strtabadd (ctx->symbol_strtab, name, 0); + + /* The value of an ABS symbol must not be modified. Since there are + no subsection and the initial offset of the section is 0 we can + get the alignment recorded by storing it into the offset + field. */ + result->offset = value; + + if (unlikely (ctx->textp)) + { + /* An absolute symbol can be defined by giving a symbol a + specific value. */ + if (binding == STB_GLOBAL) + fprintf (ctx->out.file, "\t.globl %s\n", name); + else if (binding == STB_WEAK) + fprintf (ctx->out.file, "\t.weak %s\n", name); + + if (type == STT_OBJECT) + fprintf (ctx->out.file, "\t.type %s,@object\n", name); + else if (type == STT_FUNC) + fprintf (ctx->out.file, "\t.type %s,@function\n", name); + + fprintf (ctx->out.file, "%s = %llu\n", + name, (unsigned long long int) value); + + if (size != 0) + fprintf (ctx->out.file, "\t.size %s, %llu\n", + name, (unsigned long long int) size); + } + else + { + /* Put the symbol in the hash table so that we can later find it. */ + if (asm_symbol_tab_insert (&ctx->symbol_tab, elf_hash (name), result) + != 0) + { + /* The symbol already exists. */ + __libasm_seterrno (ASM_E_DUPLSYM); + free (result); + result = NULL; + } + else if (name != NULL && asm_emit_symbol_p (name)) + /* Only count non-private symbols. */ + ++ctx->nsymbol_tab; + } + + rwlock_unlock (ctx->lock); + + return result; +} diff --git a/libasm/asm_newcomsym.c b/libasm/asm_newcomsym.c new file mode 100644 index 00000000..61e5a909 --- /dev/null +++ b/libasm/asm_newcomsym.c @@ -0,0 +1,102 @@ +/* Create new COMMON symbol. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <inttypes.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <libasmP.h> +#include <system.h> + + +/* Object for special COMMON section. */ +static const AsmScn_t __libasm_com_scn = + { + .data = { + .main = { + .scn = ASM_COM_SCN + } + } + }; + + +AsmSym_t * +asm_newcomsym (ctx, name, size, align) + AsmCtx_t *ctx; + const char *name; + GElf_Xword size; + GElf_Addr align; +{ + AsmSym_t *result; + + if (ctx == NULL) + /* Something went wrong before. */ + return NULL; + + /* Common symbols are public. Therefore the user must provide a + name. */ + if (name == NULL) + { + __libasm_seterrno (ASM_E_INVALID); + return NULL; + } + + rwlock_wrlock (ctx->lock); + + result = (AsmSym_t *) malloc (sizeof (AsmSym_t)); + if (result == NULL) + return NULL; + + result->scn = (AsmScn_t *) &__libasm_com_scn; + result->size = size; + /* XXX Do we have to allow a different type? */ + result->type = STT_OBJECT; + /* XXX Do we have to allow a different binding? */ + result->binding = STB_GLOBAL; + result->symidx = 0; + result->strent = ebl_strtabadd (ctx->symbol_strtab, name, 0); + + /* The value of a COM symbol is the alignment. Since there are no + subsection and the initial offset of the section is 0 we can get + the alignment recorded by storing it into the offset field. */ + result->offset = align; + + if (unlikely (ctx->textp)) + fprintf (ctx->out.file, "\t.comm %s, %" PRIuMAX ", %" PRIuMAX "\n", + name, (uintmax_t) size, (uintmax_t) align); + else + { + /* Put the symbol in the hash table so that we can later find it. */ + if (asm_symbol_tab_insert (&ctx->symbol_tab, elf_hash (name), result) + != 0) + { + /* The symbol already exists. */ + __libasm_seterrno (ASM_E_DUPLSYM); + free (result); + result = NULL; + } + else if (name != NULL && asm_emit_symbol_p (name)) + /* Only count non-private symbols. */ + ++ctx->nsymbol_tab; + } + + rwlock_unlock (ctx->lock); + + return result; +} diff --git a/libasm/asm_newscn.c b/libasm/asm_newscn.c new file mode 100644 index 00000000..75890a60 --- /dev/null +++ b/libasm/asm_newscn.c @@ -0,0 +1,202 @@ +/* Create new section in output file. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <assert.h> +#include <error.h> +#include <libintl.h> +#include <stdlib.h> +#include <string.h> + +#include <libasmP.h> +#include <libelf.h> +#include <system.h> + + +/* Memory for the default pattern. The type uses a flexible array + which does work well with a static initializer. So we play some + dirty tricks here. */ +static const struct +{ + struct FillPattern pattern; + char zero; +} xdefault_pattern = + { + .pattern = + { + .len = 1 + }, + .zero = '\0' + }; +const struct FillPattern *__libasm_default_pattern = &xdefault_pattern.pattern; + + +static AsmScn_t * +text_newscn (AsmScn_t *result, GElf_Word type, GElf_Xword flags) +{ + /* Buffer where we construct the flag string. */ + char flagstr[sizeof (GElf_Xword) * 8 + 5]; + char *wp = flagstr; + const char *typestr = ""; + + /* Only write out the flag string if this is the first time the + section is selected. Some assemblers cannot cope with the + .section pseudo-op otherwise. */ + wp = stpcpy (wp, ", \""); + + if (flags & SHF_WRITE) + *wp++ = 'w'; + if (flags & SHF_ALLOC) + *wp++ = 'a'; + if (flags & SHF_EXECINSTR) + *wp++ = 'x'; + if (flags & SHF_MERGE) + *wp++ = 'M'; + if (flags & SHF_STRINGS) + *wp++ = 'S'; + if (flags & SHF_LINK_ORDER) + *wp++ = 'L'; + + *wp++ = '"'; + + if (type == SHT_PROGBITS) + typestr = ",@progbits"; + else if (type == SHT_NOBITS) + typestr = ",@nobits"; + + /* Terminate the string. */ + *wp = '\0'; + + printf ("\t.section \"%s\"%s%s\n", result->name, flagstr, typestr); + + return result; +} + + +static AsmScn_t * +binary_newscn (AsmScn_t *result, GElf_Word type, GElf_Xword flags, + size_t scnname_len) +{ + GElf_Shdr shdr_mem; + GElf_Shdr *shdr; + Elf_Scn *scn; + + /* The initial subsection has the number zero. */ + result->subsection_id = 0; + + /* We start at offset zero. */ + result->offset = 0; + /* And generic alignment. */ + result->max_align = 1; + + /* No output yet. */ + result->content = NULL; + + /* Put the default fill pattern in place. */ + result->pattern = (struct FillPattern *) __libasm_default_pattern; + + /* There are no subsections so far. */ + result->subnext = NULL; + + /* Add the name to the section header string table. */ + result->data.main.strent = ebl_strtabadd (result->ctx->section_strtab, + result->name, scnname_len); + assert (result->data.main.strent != NULL); + + /* Create the new ELF section. */ + result->data.main.scn = scn = elf_newscn (result->ctx->out.elf); + if (scn == NULL) + { + free (result); + __libasm_seterrno (ASM_E_LIBELF); + return NULL; + } + + /* Not part of a section group (yet). */ + result->data.main.next_in_group = NULL; + + /* Remember the flags. */ + shdr = gelf_getshdr (scn, &shdr_mem); + + shdr->sh_flags = flags; + result->type = shdr->sh_type = type; + + (void) gelf_update_shdr (scn, shdr); + + return result; +} + + +AsmScn_t * +asm_newscn (ctx, scnname, type, flags) + AsmCtx_t *ctx; + const char *scnname; + GElf_Word type; + GElf_Xword flags; +{ + size_t scnname_len = strlen (scnname) + 1; + unsigned long int hval; + AsmScn_t *result; + + /* If no context is given there might be an earlier error. */ + if (ctx == NULL) + return NULL; + + /* Check whether only flags are set which areselectable by the user. */ + if (unlikely ((flags & ~(SHF_WRITE | SHF_ALLOC | SHF_EXECINSTR | SHF_MERGE + | SHF_STRINGS | SHF_LINK_ORDER)) != 0) + /* We allow only two section types: data and data without file + representation. */ + || (type != SHT_PROGBITS && unlikely (type != SHT_NOBITS))) + { + __libasm_seterrno (ASM_E_INVALID); + return NULL; + } + + hval = elf_hash (scnname); + + rwlock_wrlock (ctx->lock); + + /* This is a new section. */ + result = (AsmScn_t *) malloc (sizeof (AsmScn_t) + scnname_len); + if (result != NULL) + { + /* Add the name. */ + memcpy (result->name, scnname, scnname_len); + + /* Add the reference to the context. */ + result->ctx = ctx; + + /* Perform operations according to output mode. */ + result = (unlikely (ctx->textp) + ? text_newscn (result, type, flags) + : binary_newscn (result, type, flags, scnname_len)); + + /* If everything went well finally add the new section to the hash + table. */ + if (result != NULL) + { + result->allnext = ctx->section_list; + ctx->section_list = result; + } + } + + rwlock_unlock (ctx->lock); + + return result; +} +INTDEF(asm_newscn) diff --git a/libasm/asm_newscn_ingrp.c b/libasm/asm_newscn_ingrp.c new file mode 100644 index 00000000..dc0c4351 --- /dev/null +++ b/libasm/asm_newscn_ingrp.c @@ -0,0 +1,66 @@ +/* Create new section, which is member of a group, in output file. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <assert.h> + +#include "libasmP.h" + + +AsmScn_t * +asm_newscn_ingrp (ctx, scnname, type, flags, grp) + AsmCtx_t *ctx; + const char *scnname; + GElf_Word type; + GElf_Xword flags; + AsmScnGrp_t *grp; +{ + AsmScn_t *result = __asm_newscn_internal (ctx, scnname, type, flags); + + if (likely (result != NULL)) + { + /* We managed to create a section group. Add it to the section + group. */ + if (grp->nmembers == 0) + { + assert (grp->members == NULL); + grp->members = result->data.main.next_in_group = result; + } + else + { + result->data.main.next_in_group + = grp->members->data.main.next_in_group; + grp->members = grp->members->data.main.next_in_group = result; + } + + ++grp->nmembers; + + /* Set the SHF_GROUP flag. */ + if (likely (! ctx->textp)) + { + GElf_Shdr shdr_mem; + GElf_Shdr *shdr = gelf_getshdr (result->data.main.scn, &shdr_mem); + + assert (shdr != NULL); + shdr->sh_flags |= SHF_GROUP; + + (void) gelf_update_shdr (result->data.main.scn, shdr); + } + } + + return result; +} diff --git a/libasm/asm_newscngrp.c b/libasm/asm_newscngrp.c new file mode 100644 index 00000000..c1c8be3e --- /dev/null +++ b/libasm/asm_newscngrp.c @@ -0,0 +1,90 @@ +/* Create new section group. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <assert.h> +#include <stdlib.h> +#include <string.h> + +#include "libasmP.h" +#include <system.h> + + + +AsmScnGrp_t * +asm_newscngrp (ctx, grpname, signature, flags) + AsmCtx_t *ctx; + const char *grpname; + AsmSym_t *signature; + Elf32_Word flags; +{ + AsmScnGrp_t *result; + size_t grpname_len = strlen (grpname) + 1; + + if (ctx == NULL) + return NULL; + + if ((flags & ~GRP_COMDAT) != 0) + { + /* This is not a supported flag. */ + __libasm_seterrno (ASM_E_INVALID); + return NULL; + } + + result = (AsmScnGrp_t *) malloc (sizeof (AsmScnGrp_t) + grpname_len); + if (result == NULL) + return NULL; + + result->signature = signature; + result->members = NULL; + result->nmembers = 0; + result->flags = flags; + + memcpy (result->name, grpname, grpname_len); + result->strent = ebl_strtabadd (ctx->section_strtab, result->name, + grpname_len); + + if (unlikely (ctx->textp)) + // XXX TBI. What is the format? + abort (); + else + { + result->scn = elf_newscn (ctx->out.elf); + if (result->scn == NULL) + { + /* Couldn't allocate a new section. */ + __libasm_seterrno (ASM_E_LIBELF); + free (result); + return NULL; + } + } + + /* Enqueue is the context data structure. */ + if (ctx->ngroups == 0) + { + assert (ctx->groups == NULL); + ctx->groups = result->next = result; + } + else + { + result->next = ctx->groups->next; + ctx->groups = ctx->groups->next = result; + } + ++ctx->ngroups; + + return result; +} diff --git a/libasm/asm_newsubscn.c b/libasm/asm_newsubscn.c new file mode 100644 index 00000000..e767720e --- /dev/null +++ b/libasm/asm_newsubscn.c @@ -0,0 +1,84 @@ +/* Create new subsection section in given section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <stdlib.h> + +#include <libasmP.h> +#include <system.h> + + +AsmScn_t * +asm_newsubscn (asmscn, nr) + AsmScn_t *asmscn; + unsigned int nr; +{ + AsmScn_t *runp; + AsmScn_t *newp; + + /* Just return if no section is given. The error must have been + somewhere else. */ + if (asmscn == NULL) + return NULL; + + /* Determine whether there is already a subsection with this number. */ + runp = asmscn->subsection_id == 0 ? asmscn : asmscn->data.up; + while (1) + { + if (runp->subsection_id == nr) + /* Found it. */ + return runp; + + if (runp->subnext == NULL || runp->subnext->subsection_id > nr) + break; + + runp = runp->subnext; + } + + newp = (AsmScn_t *) malloc (sizeof (AsmScn_t)); + if (newp == NULL) + return NULL; + + /* Same assembler context than the original section. */ + newp->ctx = runp->ctx; + + /* User provided the subsectio nID. */ + newp->subsection_id = nr; + + /* Inherit the parent's type. */ + newp->type = runp->type; + + /* Pointer to the zeroth subsection. */ + newp->data.up = runp->subsection_id == 0 ? runp : runp->data.up; + + /* We start at offset zero. */ + newp->offset = 0; + /* And generic alignment. */ + newp->max_align = 1; + + /* No output yet. */ + newp->content = NULL; + + /* Inherit the fill pattern from the section this one is derived from. */ + newp->pattern = asmscn->pattern; + + /* Enqueue at the right position in the list. */ + newp->subnext = runp->subnext; + runp->subnext = newp; + + return newp; +} diff --git a/libasm/asm_newsym.c b/libasm/asm_newsym.c new file mode 100644 index 00000000..6a6df2d8 --- /dev/null +++ b/libasm/asm_newsym.c @@ -0,0 +1,116 @@ +/* Define new symbol for current position in given section. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <inttypes.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <libasmP.h> +#include <system.h> + + +AsmSym_t * +asm_newsym (asmscn, name, size, type, binding) + AsmScn_t *asmscn; + const char *name; + GElf_Xword size; + int type; + int binding; +{ +#define TEMPSYMLEN 10 + char tempsym[TEMPSYMLEN]; + AsmSym_t *result; + + if (asmscn == NULL) + /* Something went wrong before. */ + return NULL; + + /* Generate a temporary symbol if necessary. */ + if (name == NULL) + { + /* If a local symbol name is created the symbol better have + local binding. */ + if (binding != STB_LOCAL) + { + __libasm_seterrno (ASM_E_INVALID); + return NULL; + } + + // XXX This requires getting the format from the machine backend. */ + snprintf (tempsym, TEMPSYMLEN, ".L%07u", asmscn->ctx->tempsym_count++); + } + + result = (AsmSym_t *) malloc (sizeof (AsmSym_t)); + if (result == NULL) + return NULL; + + rwlock_wrlock (asmscn->ctx->lock); + + result->scn = asmscn; + result->offset = asmscn->offset; + result->size = size; + result->type = type; + result->binding = binding; + result->symidx = 0; + result->strent = ebl_strtabadd (asmscn->ctx->symbol_strtab, + name ?: tempsym, 0); + + if (unlikely (asmscn->ctx->textp)) + { + /* We are only interested in the name and don't need to know whether + it is a local name or not. */ + if (name == NULL) + name = tempsym; + + /* First print the binding pseudo-op. */ + if (binding == STB_GLOBAL) + fprintf (asmscn->ctx->out.file, "\t.globl\t%s\n", name); + else if (binding == STB_WEAK) + fprintf (asmscn->ctx->out.file, "\t.weak\t%s\n", name); + + /* Next the symbol type. */ + if (type == STT_OBJECT) + fprintf (asmscn->ctx->out.file, "\t.type\t%s,@object\n", name); + else if (type == STT_FUNC) + fprintf (asmscn->ctx->out.file, "\t.type\t%s,@function\n", name); + + /* Finally the size and the label. */ + fprintf (asmscn->ctx->out.file, "\t.size\t%s,%" PRIuMAX "\n%s:\n", + name, (uintmax_t) size, name); + } + else + { + /* Put the symbol in the hash table so that we can later find it. */ + if (asm_symbol_tab_insert (&asmscn->ctx->symbol_tab, + elf_hash (name ?: tempsym), result) != 0) + { + /* The symbol already exists. */ + __libasm_seterrno (ASM_E_DUPLSYM); + free (result); + result = NULL; + } + else if (name != NULL && asm_emit_symbol_p (name)) + /* Only count non-private symbols. */ + ++asmscn->ctx->nsymbol_tab; + } + + rwlock_unlock (asmscn->ctx->lock); + + return result; +} diff --git a/libasm/asm_scngrp_newsignature.c b/libasm/asm_scngrp_newsignature.c new file mode 100644 index 00000000..d4042a24 --- /dev/null +++ b/libasm/asm_scngrp_newsignature.c @@ -0,0 +1,33 @@ +/* Update signature of section group. + Copyright (C) 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2002. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include "libasmP.h" + + +int +asm_scngrp_newsignature (grp, signature) + AsmScnGrp_t *grp; + AsmSym_t *signature; +{ + if (grp == NULL || signature == NULL) + return 1; + + grp->signature = signature; + + return 0; +} diff --git a/libasm/libasm.h b/libasm/libasm.h new file mode 100644 index 00000000..dbdd6fc2 --- /dev/null +++ b/libasm/libasm.h @@ -0,0 +1,155 @@ +/* Interface for libasm. + Copyright (C) 2002 Red Hat, Inc. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifndef _LIBASM_H +#define _LIBASM_H 1 + +#include <stdbool.h> +#include <stdint.h> + +#include <gelf.h> + + +/* Opaque type for the assembler context descriptor. */ +typedef struct AsmCtx AsmCtx_t; + +/* Opaque type for a section. */ +typedef struct AsmScn AsmScn_t; + +/* Opaque type for a section group. */ +typedef struct AsmScnGrp AsmScnGrp_t; + +/* Opaque type for a symbol. */ +typedef struct AsmSym AsmSym_t; + + +#ifdef __cplusplus +extern "C" { +#endif + +/* Create output file and return descriptor for assembler context. If + TEXTP is true the output is an assembler format text file. + Otherwise an object file is created. The MACHINE parameter + corresponds to an EM_ constant from <elf.h>, KLASS specifies the + class (32- or 64-bit), and DATA specifies the byte order (little or + big endian). */ +extern AsmCtx_t *asm_begin (const char *fname, bool textp, int machine, + int klass, int data); + +/* Abort the operation on the assembler context and free all resources. */ +extern int asm_abort (AsmCtx_t *ctx); + +/* Finalize output file and free all resources. */ +extern int asm_end (AsmCtx_t *ctx); + + +/* Return handle for the named section. If it was not used before + create it. */ +extern AsmScn_t *asm_newscn (AsmCtx_t *ctx, const char *scnname, + GElf_Word type, GElf_Xword flags); + + +/* Similar to 'asm_newscn', but make it part of section group GRP. */ +extern AsmScn_t *asm_newscn_ingrp (AsmCtx_t *ctx, const char *scnname, + GElf_Word type, GElf_Xword flags, + AsmScnGrp_t *grp); + +/* Create new subsection NR in the given section. */ +extern AsmScn_t *asm_newsubscn (AsmScn_t *asmscn, unsigned int nr); + + +/* Return handle for new section group. The signature symbol can be + set later. */ +extern AsmScnGrp_t *asm_newscngrp (AsmCtx_t *ctx, const char *grpname, + AsmSym_t *signature, Elf32_Word flags); + +/* Set or overwrite signature symbol for group. */ +extern int asm_scngrp_newsignature (AsmScnGrp_t *grp, AsmSym_t *signature); + + +/* Add zero terminated string STR of size LEN to (sub)section ASMSCN. */ +extern int asm_addstrz (AsmScn_t *asmscn, const char *str, size_t len); + +/* Add 8-bit signed integer NUM to (sub)section ASMSCN. */ +extern int asm_addint8 (AsmScn_t *asmscn, int8_t num); + +/* Add 8-bit unsigned integer NUM to (sub)section ASMSCN. */ +extern int asm_adduint8 (AsmScn_t *asmscn, uint8_t num); + +/* Add 16-bit signed integer NUM to (sub)section ASMSCN. */ +extern int asm_addint16 (AsmScn_t *asmscn, int16_t num); + +/* Add 16-bit unsigned integer NUM to (sub)section ASMSCN. */ +extern int asm_adduint16 (AsmScn_t *asmscn, uint16_t num); + +/* Add 32-bit signed integer NUM to (sub)section ASMSCN. */ +extern int asm_addint32 (AsmScn_t *asmscn, int32_t num); + +/* Add 32-bit unsigned integer NUM to (sub)section ASMSCN. */ +extern int asm_adduint32 (AsmScn_t *asmscn, uint32_t num); + +/* Add 64-bit signed integer NUM to (sub)section ASMSCN. */ +extern int asm_addint64 (AsmScn_t *asmscn, int64_t num); + +/* Add 64-bit unsigned integer NUM to (sub)section ASMSCN. */ +extern int asm_adduint64 (AsmScn_t *asmscn, uint64_t num); + + +/* Add signed little endian base 128 integer NUM to (sub)section ASMSCN. */ +extern int asm_addsleb128 (AsmScn_t *asmscn, int32_t num); + +/* Add unsigned little endian base 128 integer NUM to (sub)section ASMSCN. */ +extern int asm_adduleb128 (AsmScn_t *asmscn, uint32_t num); + + +/* Define new symbol NAME for current position in given section ASMSCN. */ +extern AsmSym_t *asm_newsym (AsmScn_t *asmscn, const char *name, + GElf_Xword size, int type, int binding); + + +/* Define new common symbol NAME with given SIZE and alignment. */ +extern AsmSym_t *asm_newcomsym (AsmCtx_t *ctx, const char *name, + GElf_Xword size, GElf_Addr align); + +/* Define new common symbol NAME with given SIZE, VALUE, TYPE, and BINDING. */ +extern AsmSym_t *asm_newabssym (AsmCtx_t *ctx, const char *name, + GElf_Xword size, GElf_Addr value, + int type, int binding); + + +/* Align (sub)section offset according to VALUE. */ +extern int asm_align (AsmScn_t *asmscn, GElf_Word value); + +/* Set the byte pattern used to fill gaps created by alignment. */ +extern int asm_fill (AsmScn_t *asmscn, void *bytes, size_t len); + + +/* Return ELF descriptor created for the output file of the given context. */ +extern Elf *asm_getelf (AsmCtx_t *ctx); + + +/* Return error code of last failing function call. This value is kept + separately for each thread. */ +extern int asm_errno (void); + +/* Return error string for ERROR. If ERROR is zero, return error string + for most recent error or NULL is none occurred. If ERROR is -1 the + behaviour is similar to the last case except that not NULL but a legal + string is returned. */ +extern const char *asm_errmsg (int __error); + +#ifdef __cplusplus +} +#endif + +#endif /* libasm.h */ diff --git a/libasm/libasm.map b/libasm/libasm.map new file mode 100644 index 00000000..b0b5b5b7 --- /dev/null +++ b/libasm/libasm.map @@ -0,0 +1,33 @@ +ELFUTILS_1.0 { + global: + asm_abort; + asm_addint16; + asm_addint32; + asm_addint64; + asm_addint8; + asm_addsleb128; + asm_addstrz; + asm_adduint16; + asm_adduint32; + asm_adduint64; + asm_adduint8; + asm_adduleb128; + asm_align; + asm_begin; + asm_end; + asm_errmsg; + asm_errno; + asm_fill; + asm_getelf; + asm_newabssym; + asm_newcomsym; + asm_newscn; + asm_newscn_ingrp; + asm_newscngrp; + asm_newsubscn; + asm_newsym; + asm_scngrp_newsignature; + + local: + *; +}; diff --git a/libasm/libasmP.h b/libasm/libasmP.h new file mode 100644 index 00000000..2e4954f6 --- /dev/null +++ b/libasm/libasmP.h @@ -0,0 +1,268 @@ +/* Internal definitions for libasm. + Copyright (C) 2002, 2004 Red Hat, Inc. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifndef _LIBASMP_H +#define _LIBASMP_H 1 + +#include <stdio.h> + +#include <libasm.h> +#include <libebl.h> + +/* gettext helper macros. */ +#define _(Str) dgettext ("elfutils", Str) + + +/* Known error codes. */ +enum + { + ASM_E_NOERROR, + ASM_E_NOMEM, /* No more memory. */ + ASM_E_CANNOT_CREATE, /* Output file cannot be created. */ + ASM_E_INVALID, /* Invalid parameters. */ + ASM_E_CANNOT_CHMOD, /* Cannot change mode of output file. */ + ASM_E_CANNOT_RENAME, /* Cannot rename output file. */ + ASM_E_DUPLSYM, /* Duplicate symbol definition. */ + ASM_E_LIBELF, /* Refer to error in libelf. */ + ASM_E_TYPE, /* Invalid section type for operation. */ + ASM_E_NUM /* Keep this entry as the last. */ + }; + + +/* Special sections. */ +#define ASM_ABS_SCN ((Elf_Scn *) 1) +#define ASM_COM_SCN ((Elf_Scn *) 2) + + +/* And the hash table for symbols. */ +#include <symbolhash.h> + + +/* Descriptor for a section. */ +struct AsmScn +{ + /* The underlying assembler context. */ + AsmCtx_t *ctx; + + /* Subsection ID. */ + unsigned int subsection_id; + + /* Section type. */ + GElf_Word type; + + union + { + /* Data only stored in the record for subsection zero. */ + struct + { + /* The ELF section. */ + Elf_Scn *scn; + + /* Entry in the section header string table. */ + struct Ebl_Strent *strent; + + /* Next member of group. */ + struct AsmScn *next_in_group; + } main; + + /* Pointer to the record for subsection zero. */ + AsmScn_t *up; + } data; + + /* Current offset in the (sub)section. */ + GElf_Off offset; + /* Maximum alignment of the section so far. */ + GElf_Word max_align; + + /* Section content. */ + struct AsmData + { + /* Currently used number of bytes in the block. */ + size_t len; + + /* Number of bytes allocated. */ + size_t maxlen; + + /* Pointer to the next block. */ + struct AsmData *next; + + /* The actual data. */ + char data[flexarr_size]; + } *content; + + /* Fill pattern. */ + struct FillPattern + { + size_t len; + char bytes[flexarr_size]; + } *pattern; + + /* Next subsection. */ + AsmScn_t *subnext; + + /* List of all allocated sections. */ + AsmScn_t *allnext; + + /* Name of the section. */ + char name[flexarr_size]; +}; + + +/* Descriptor used for the assembling session. */ +struct AsmCtx +{ + /* File descriptor of the temporary file. */ + int fd; + + /* True if text output is wanted. */ + bool textp; + + /* Output file handle. */ + union + { + /* ELF descriptor of the temporary file. */ + Elf *elf; + /* I/O stream for text output. */ + FILE *file; + } out; + + + /* List with defined sections. */ + AsmScn_t *section_list; + /* Section header string table. */ + struct Ebl_Strtab *section_strtab; + + /* Table with defined symbols. */ + asm_symbol_tab symbol_tab; + /* Number of symbols in the table. */ + unsigned int nsymbol_tab; + /* Symbol string table. */ + struct Ebl_Strtab *symbol_strtab; + + /* List of section groups. */ + struct AsmScnGrp *groups; + /* Number of section groups. */ + size_t ngroups; + + /* Current required alignment for common symbols. */ + GElf_Word common_align; + + /* Lock to handle multithreaded programs. */ + rwlock_define (,lock); + + /* Counter for temporary symbols. */ + unsigned int tempsym_count; + + /* Name of the output file. */ + char *fname; + /* The name of the temporary file. */ + char tmp_fname[flexarr_size]; +}; + + +/* Descriptor for a symbol. */ +struct AsmSym +{ + /* Reference to the section which contains the symbol. */ + AsmScn_t *scn; + + /* Type of the symbol. */ + int8_t type; + /* Binding of the symbol. */ + int8_t binding; + + /* Size of the symbol. */ + GElf_Xword size; + + /* Offset in the section. */ + GElf_Off offset; + + /* Symbol table index of the symbol in the symbol table. */ + size_t symidx; + + /* Reference to name of the symbol. */ + struct Ebl_Strent *strent; +}; + + +/* Descriptor for section group. */ +struct AsmScnGrp +{ + /* Entry in the section header string table. */ + struct Ebl_Strent *strent; + + /* The ELF section. */ + Elf_Scn *scn; + + /* The signature. */ + struct AsmSym *signature; + + /* First member. */ + struct AsmScn *members; + /* Number of members. */ + size_t nmembers; + + /* Flags. */ + Elf32_Word flags; + + /* Next group. */ + struct AsmScnGrp *next; + + /* Name of the section group. */ + char name[flexarr_size]; +}; + + +/* The default fill pattern: one zero byte. */ +extern const struct FillPattern *__libasm_default_pattern + attribute_hidden; + + +/* Ensure there are at least LEN bytes available in the output buffer + for ASMSCN. */ +extern int __libasm_ensure_section_space (AsmScn_t *asmscn, size_t len) + internal_function; + +/* Free all resources associated with the assembler context. */ +extern void __libasm_finictx (AsmCtx_t *ctx) internal_function; + +/* Set error code. */ +extern void __libasm_seterrno (int err) internal_function; + +/* Return handle for the named section. If it was not used before + create it. */ +extern AsmScn_t *__asm_newscn_internal (AsmCtx_t *ctx, const char *scnname, + GElf_Word type, GElf_Xword flags) + attribute_hidden; + + +/* Internal aliases of the asm_addintXX functions. */ +extern int __asm_addint8_internal (AsmScn_t *asmscn, int8_t num) + attribute_hidden; +extern int __asm_addint16_internal (AsmScn_t *asmscn, int16_t num) + attribute_hidden; +extern int __asm_addint32_internal (AsmScn_t *asmscn, int32_t num) + attribute_hidden; +extern int __asm_addint64_internal (AsmScn_t *asmscn, int64_t num) + attribute_hidden; + + + +/* Test whether given symbol is an internal symbol and if yes, whether + we should nevertheless emit it in the symbol table. */ +// XXX The second part should probably be controlled by an option which +// isn't implemented yet +// XXX Also, the format will change with the backend. +#define asm_emit_symbol_p(name) (strncmp (name, ".L", 2) != 0) + +#endif /* libasmP.h */ diff --git a/libasm/symbolhash.c b/libasm/symbolhash.c new file mode 100644 index 00000000..62d2c852 --- /dev/null +++ b/libasm/symbolhash.c @@ -0,0 +1,39 @@ +/* Symbol hash table implementation. + Copyright (C) 2001, 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2001. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <string.h> + +#include <libasmP.h> +#include <libebl.h> + +/* Definitions for the symbol hash table. */ +#define TYPE AsmSym_t * +#define NAME asm_symbol_tab +#define ITERATE 1 +#define REVERSE 1 +#define COMPARE(a, b) \ + strcmp (ebl_string ((a)->strent), ebl_string ((b)->strent)) + +#define next_prime __libasm_next_prime +extern size_t next_prime (size_t) attribute_hidden; + +#include "../lib/dynamicsizehash.c" + +#undef next_prime +#define next_prime attribute_hidden __libasm_next_prime +#include "../lib/next_prime.c" diff --git a/libasm/symbolhash.h b/libasm/symbolhash.h new file mode 100644 index 00000000..4377b4b5 --- /dev/null +++ b/libasm/symbolhash.h @@ -0,0 +1,25 @@ +/* Copyright (C) 2001, 2002 Red Hat, Inc. + Written by Ulrich Drepper <drepper@redhat.com>, 2001. + + This program is Open Source software; you can redistribute it and/or + modify it under the terms of the Open Software License version 1.0 as + published by the Open Source Initiative. + + You should have received a copy of the Open Software License along + with this program; if not, you may obtain a copy of the Open Software + License version 1.0 from http://www.opensource.org/licenses/osl.php or + by writing the Open Source Initiative c/o Lawrence Rosen, Esq., + 3001 King Ranch Road, Ukiah, CA 95482. */ + +#ifndef SYMBOLHASH_H +#define SYMBOLHASH_H 1 + +/* Definitions for the symbol hash table. */ +#define TYPE AsmSym_t * +#define NAME asm_symbol_tab +#define ITERATE 1 +#define COMPARE(a, b) \ + strcmp (ebl_string ((a)->strent), ebl_string ((b)->strent)) +#include <dynamicsizehash.h> + +#endif /* symbolhash.h */ |