1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/pkg/devices/util/include/dl.h Mon May 28 23:44:25 2018 +0200
1.3 @@ -0,0 +1,30 @@
1.4 +/*
1.5 + * Dynamic loading support.
1.6 + *
1.7 + * Copyright (C) 2018 Paul Boddie <paul@boddie.org.uk>
1.8 + *
1.9 + * This program is free software; you can redistribute it and/or
1.10 + * modify it under the terms of the GNU General Public License as
1.11 + * published by the Free Software Foundation; either version 2 of
1.12 + * the License, or (at your option) any later version.
1.13 + *
1.14 + * This program is distributed in the hope that it will be useful,
1.15 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.16 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.17 + * GNU General Public License for more details.
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License
1.20 + * along with this program; if not, write to the Free Software
1.21 + * Foundation, Inc., 51 Franklin Street, Fifth Floor,
1.22 + * Boston, MA 02110-1301, USA
1.23 + */
1.24 +
1.25 +#pragma once
1.26 +
1.27 +#include <l4/sys/types.h>
1.28 +
1.29 +EXTERN_C_BEGIN
1.30 +
1.31 +void *load_function(const char *filename, const char *function);
1.32 +
1.33 +EXTERN_C_END
2.1 --- a/pkg/devices/util/src/Makefile Sun May 27 22:08:58 2018 +0200
2.2 +++ b/pkg/devices/util/src/Makefile Mon May 28 23:44:25 2018 +0200
2.3 @@ -4,10 +4,10 @@
2.4 TARGET = libdevice_util.o.a
2.5 PC_FILENAME := libdevice-util
2.6
2.7 -SRC_CC := dataspace.cc event-loop.cc memory.cc
2.8 +SRC_CC := dataspace.cc dl.cc event-loop.cc memory.cc
2.9
2.10 PRIVATE_INCDIR += $(PKGDIR)/util/include
2.11
2.12 -REQUIRES_LIBS := libio l4re_c l4re_c-util
2.13 +REQUIRES_LIBS := libio l4re_c l4re_c-util libdl
2.14
2.15 include $(L4DIR)/mk/lib.mk
3.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
3.2 +++ b/pkg/devices/util/src/dl.cc Mon May 28 23:44:25 2018 +0200
3.3 @@ -0,0 +1,50 @@
3.4 +/*
3.5 + * Dynamic loading support.
3.6 + *
3.7 + * (c) 2018 Paul Boddie <paul@boddie.org.uk>
3.8 + *
3.9 + * This program is free software; you can redistribute it and/or
3.10 + * modify it under the terms of the GNU General Public License as
3.11 + * published by the Free Software Foundation; either version 2 of
3.12 + * the License, or (at your option) any later version.
3.13 + *
3.14 + * This program is distributed in the hope that it will be useful,
3.15 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
3.16 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3.17 + * GNU General Public License for more details.
3.18 + *
3.19 + * You should have received a copy of the GNU General Public License
3.20 + * along with this program; if not, write to the Free Software
3.21 + * Foundation, Inc., 51 Franklin Street, Fifth Floor,
3.22 + * Boston, MA 02110-1301, USA
3.23 + */
3.24 +
3.25 +#include <l4/devices/dl.h>
3.26 +#include <dlfcn.h>
3.27 +#include <stdio.h>
3.28 +
3.29 +void *load_function(const char *filename, const char *function)
3.30 +{
3.31 + char libname[64];
3.32 + FILE *f = fopen(filename, "r");
3.33 + size_t nread;
3.34 + void *handle;
3.35 +
3.36 + /* Obtain the library name from the file. */
3.37 +
3.38 + if (f == NULL) return 0;
3.39 +
3.40 + nread = fread(libname, sizeof(char), 63, f);
3.41 + fclose(f);
3.42 +
3.43 + if (ferror(f)) return 0;
3.44 +
3.45 + libname[nread] = '\0';
3.46 +
3.47 + /* Obtain the linked data. */
3.48 +
3.49 + handle = dlopen(libname, RTLD_NOW);
3.50 + if (handle == NULL) return 0;
3.51 +
3.52 + return dlsym(handle, function);
3.53 +}