From 05c81f45b477cf57a04f2e8dafa977000c0fa4d4 Mon Sep 17 00:00:00 2001 From: Sean Eric Fagan Date: Mon, 23 Aug 1993 07:45:32 +0000 Subject: [PATCH] Add support for netbsd386 (almost-but-not-quite 386bsd). --- bfd/config.bfd | 1 + bfd/netbsd386.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++ gdb/configure.in | 2 + gdb/dbxread.c | 40 ++++++++++++++--- 4 files changed, 149 insertions(+), 5 deletions(-) create mode 100644 bfd/netbsd386.c diff --git a/bfd/config.bfd b/bfd/config.bfd index af7cfea148..2ed4dfddee 100755 --- a/bfd/config.bfd +++ b/bfd/config.bfd @@ -31,6 +31,7 @@ case "${canon}" in i[34]86-*-isc*) bfd_name=i386-sco ;; # gets core dump reading right i[34]86-*-sco*) bfd_name=i386-sco ;; i[34]86-*-bsd*) bfd_name=i386-bsd ;; + i[34]86-*-netbsd) bfd_name=i386-netbsd ;; # CYGNUS LOCAL i[34]86-*-lynxos*) bfd_name=i386-lynx ;; i[34]86-*-coff) bfd_name=i386-coff ;; i[34]86-*-aix*) bfd_name=i386-coff ;; diff --git a/bfd/netbsd386.c b/bfd/netbsd386.c new file mode 100644 index 0000000000..207638a31c --- /dev/null +++ b/bfd/netbsd386.c @@ -0,0 +1,111 @@ +/* BFD back-end for NetBSD/386 a.out-ish binaries. + Copyright (C) 1990, 1991, 1992 Free Software Foundation, Inc. + +This file is part of BFD, the Binary File Descriptor library. + +This program 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; either version 2 of the License, or +(at your option) any later version. + +This program 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 this program; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#define BYTES_IN_WORD 4 +#define ARCH 32 + +/* ZMAGIC files never have the header in the text. */ +#define N_HEADER_IN_TEXT(x) 0 + +/* ZMAGIC files start at address 0. This does not apply to QMAGIC. */ +#define TEXT_START_ADDR 0 + +#define PAGE_SIZE 4096 +#define SEGMENT_SIZE PAGE_SIZE + +#define DEFAULT_ARCH bfd_arch_i386 +#define MACHTYPE_OK(mtype) ((mtype) == M_386 || (mtype) == M_I386 || (mtype) == M_UNKNOWN) + +#define MY(OP) CAT(netbsd386_,OP) +#define TARGETNAME "netbsd-386" + +#define N_MAGIC(ex) \ + ( (((ex).a_info)&0xffff0000) ? (ntohl(((ex).a_info))&0xffff) : ((ex).a_info)) +#define N_MACHTYPE(ex) \ + ( (((ex).a_info)&0xffff0000) ? ((ntohl(((ex).a_info))>>16)&0x03ff) : 0 ) +# define N_FLAGS(ex) \ + ( (((ex).a_info)&0xffff0000) ? ((ntohl(((ex).a_info))>>26)&0x3f) : 0 ) +#define N_SET_INFO(ex, mag,mid,flag) \ + ( (ex).a_info = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \ + (((mag)&0xffff)) ) ) +#define N_SET_MAGIC(exec,magic) \ + ((exec).a_info = (((exec).a_info & ~0xffff) | ((magic) & 0xffff))) +#define N_SET_MACHTYPE(exec,machtype) \ + ((exec).a_info = \ + (((exec).a_info & ~(0x3ff<<16)) | (((machtype)&0xff) << 16))) +#define N_SET_FLAGS(exec, flags) \ + ((exec).a_info = ((exec).a_info & 0xffff) | (flags & 0xffff)) + +#include "bfd.h" +#include "sysdep.h" +#include "libbfd.h" +#include "libaout.h" + +#define N_GETMAGIC2(ex) \ + ( (((ex).a_info)&0xffff0000) ? (ntohl(((ex).a_info))&0xffff) : \ + (((ex).a_info) | 0x10000) ) + +#define N_TXTADDR(ex) (N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : 4096) +#define N_TXTOFF(ex) \ + ( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \ + 0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? 4096 : EXEC_BYTES_SIZE )) +#define N_ALIGN(ex,x) \ + (N_MAGIC(ex) == ZMAGIC || N_MAGIC(ex) == QMAGIC ? \ + ((x) + 4096 - 1) & ~(4096 - 1) : (x)) +#define N_DATADDR(ex) \ + N_ALIGN(ex, N_TXTADDR(ex) + (ex).a_text) +/* Data segment offset. */ +#define N_DATOFF(ex) \ + N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text) + +/* #define N_BADMAG(x) n_badmag(N_MAGIC(x)) */ + +#define NO_SWAP_MAGIC /* magic number already in correct endian format */ + +#include "aout-target.h" + +#if 0 +int +n_badmag(x) +unsigned long x; { + union { + unsigned long l; + unsigned char c[sizeof(unsigned long)]; + } l; + unsigned char temp; + + printf ("x = %o, OMAGIC = %o, NMAGIC = %o, ZMAGIC = %o, QMAGIC = %o\n", + x, OMAGIC, NMAGIC, ZMAGIC, QMAGIC); + + l.l = x; + temp = l.c[0]; + l.c[0] = l.c[3]; + l.c[3] = temp; + temp = l.c[2]; + l.c[2] = l.c[1]; + l.c[1] = temp; + printf ("\tbyte-swapped(x) = %o\n", l.l); + + return (x != OMAGIC + && x != NMAGIC + && x != ZMAGIC + && x != QMAGIC); +} +#endif + diff --git a/gdb/configure.in b/gdb/configure.in index 2dbc974034..2c9a033ae5 100644 --- a/gdb/configure.in +++ b/gdb/configure.in @@ -40,6 +40,7 @@ i[34]86-sequent-sysv*) gdb_host=ptx ;; i[34]86-*-aix*) gdb_host=i386aix ;; i[34]86-*-bsd*) gdb_host=i386bsd ;; +i[34]86-*-netbsd) gdb_host=i386bsd ;; i[34]86-*-go32) gdb_host=go32 ;; i[34]86-*-linux) gdb_host=linux ;; i[34]86-*-lynx*) gdb_host=i386lynx ;; @@ -177,6 +178,7 @@ i[34]86-*-elf) gdb_target=i386v ;; i[34]86-*-aix*) gdb_target=i386aix ;; i[34]86-*-bsd*) gdb_target=i386bsd ;; +i[34]86-*-netbsd) gdb_target=i386bsd ;; i[34]86-*-go32) gdb_target=i386aout ;; i[34]86-*-lynx*) gdb_target=i386lynx configdirs="${configdirs} gdbserver" diff --git a/gdb/dbxread.c b/gdb/dbxread.c index 012fac2011..b55362e2f2 100644 --- a/gdb/dbxread.c +++ b/gdb/dbxread.c @@ -438,10 +438,28 @@ record_minimal_symbol (name, address, type, objfile) ms_type = mst_file_data; break; #endif + case N_TEXT: + /* Don't put gcc_compiled, __gnu_compiled_cplus, and friends into + the minimal symbols, because if there is also another symbol + at the same address (e.g. the first function of the file), + lookup_minimal_symbol_by_pc would have no way of getting the + right one. */ + if (name[0] == 'g' + && (strcmp (name, GCC_COMPILED_FLAG_SYMBOL) == 0 + || strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0)) + return; + + { + char *tempstring = name; + if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd)) + ++tempstring; + if (STREQN (tempstring, "__gnu_compiled", 14)) + return; + } + case N_NBTEXT: case N_FN: case N_FN_SEQ: - case N_TEXT: ms_type = mst_file_text; break; @@ -450,9 +468,8 @@ record_minimal_symbol (name, address, type, objfile) /* Check for __DYNAMIC, which is used by Sun shared libraries. Record it as global even if it's local, not global, so - lookup_minimal_symbol can find it. - FIXME: this might want to check for _DYNAMIC and the current - symbol_leading_char. */ + lookup_minimal_symbol can find it. We don't check symbol_leading_char + because for SunOS4 it always is '_'. */ if (name[8] == 'C' && STREQ ("__DYNAMIC", name)) ms_type = mst_data; @@ -2142,7 +2159,7 @@ dbx_symfile_offsets (objfile, addr) } /* Register our willingness to decode symbols for SunOS and a.out and - b.out files handled by BFD... */ + NetBSD and b.out files handled by BFD... */ static struct sym_fns sunos_sym_fns = { "sunOs", /* sym_name: name or name prefix of BFD target type */ @@ -2167,6 +2184,18 @@ static struct sym_fns aout_sym_fns = NULL /* next: pointer to next struct sym_fns */ }; +static struct sym_fns netbsd386_sym_fns = +{ + "netbsd-386", /* sym_name: name or name prefix of BFD target type */ + 10, /* sym_namelen: number of significant sym_name chars */ + dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */ + dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */ + dbx_symfile_read, /* sym_read: read a symbol file into symtab */ + dbx_symfile_finish, /* sym_finish: finished with file, cleanup */ + dbx_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */ + NULL /* next: pointer to next struct sym_fns */ +}; + static struct sym_fns bout_sym_fns = { "b.out", /* sym_name: name or name prefix of BFD target type */ @@ -2184,5 +2213,6 @@ _initialize_dbxread () { add_symtab_fns(&sunos_sym_fns); add_symtab_fns(&aout_sym_fns); + add_symtab_fns(&netbsd386_sym_fns); add_symtab_fns(&bout_sym_fns); }