add linker script

git-svn-id: http://ltt.polymtl.ca/svn@2811 04897980-b3bd-0310-b5e0-8ef037075253

diff --git a/markers-userspace/Makefile b/markers-userspace/Makefile
index 1a32a8acef092e0c5ba1f8a685f94257a9338249..1c9bd84960ff2a47fa221e5ac2f7c23341755f12 100644 (file)
--- a/markers-userspace/Makefile
+++ b/markers-userspace/Makefile
@@ -7,7 +7,7 @@ marker-lib.o: marker-lib.c marker.h
        $(CC) -O2 -DCONFIG_MARKERS -c -o $@ marker-lib.c
 
 testprog: testprog.c marker.h marker-lib.o
-       $(CC) -O2 -DCONFIG_MARKERS -o $@ testprog.c marker-lib.o
+       $(CC) -Wl,-Telf_i386.xmark -O2 -DCONFIG_MARKERS -o $@ testprog.c marker-lib.o
 
 testprog.S: testprog.c marker.h
        $(CC) -O2 -DCONFIG_MARKERS -S -o $@ testprog.c

diff --git a/markers-userspace/elf_i386.xmark b/markers-userspace/elf_i386.xmark
new file mode 100644 (file)
index 0000000..9ea3ead
--- /dev/null
+++ b/markers-userspace/elf_i386.xmark
@@ -0,0 +1,201 @@
+/* Default linker script, for normal executables */
+OUTPUT_FORMAT("elf32-i386", "elf32-i386",
+             "elf32-i386")
+OUTPUT_ARCH(i386)
+ENTRY(_start)
+SEARCH_DIR("/usr/i486-linux-gnu/lib32"); SEARCH_DIR("/usr/local/lib32"); SEARCH_DIR("/lib32"); SEARCH_DIR("/usr/lib32"); SEARCH_DIR("/usr/i486-linux-gnu/lib"); SEARCH_DIR("/usr/local/lib"); SEARCH_DIR("/lib"); SEARCH_DIR("/usr/lib");
+SECTIONS
+{
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+  /* Adjust the address for the data segment.  We want to adjust up to
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+  /* Exception handling  */
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+     KEEP (*(SORT(.init_array.*)))
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+    PROVIDE_HIDDEN (__fini_array_end = .);
+  }
+  .ctors          :
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+    /* gcc uses crtbegin.o to find the start of
+       the constructors, so we make sure it is
+       first.  Because this is a wildcard, it
+       doesn't matter if the user does not
+       actually link against crtbegin.o; the
+       linker won't look for a file to match a
+       wildcard.  The wildcard also means that it
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+       is in.  */
+    KEEP (*crtbegin.o(.ctors))
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+    /* We don't want to include the .ctor section from
+       the crtend.o file until after the sorted ctors.
+       The .ctor section from the crtend file contains the
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diff --git a/markers-userspace/marker-lib.c b/markers-userspace/marker-lib.c
index da5bcaa33802bbc2c9ae6acbf5d73f295eb26fa4..d690e527d5404811ccda104b572d263b6e813622 100644 (file)
--- a/markers-userspace/marker-lib.c
+++ b/markers-userspace/marker-lib.c
@@ -1,5 +1,9 @@
 
 #include "marker.h"
+#include <stdio.h>
+
+extern struct marker __start___markers[];
+extern struct marker __stop___markers[];
 
 /**
  * __mark_empty_function - Empty probe callback
@@ -32,3 +36,14 @@ void marker_probe_cb(const struct marker *mdata, void *call_private,
 
 
 }
+
+__attribute__((constructor)) void marker_init(void)
+{
+       struct marker *iter;
+
+       printf("Marker section : from %p to %p\n",
+               __start___markers, __stop___markers);
+       for (iter = __start___markers; iter < __stop___markers; iter++) {
+               printf("Marker : %s\n", iter->name);
+       }
+}