diff options
| -rw-r--r-- | README | 4 | ||||
| -rw-r--r-- | main.cxx | 30 | ||||
| -rw-r--r-- | stap.1.in | 9 |
3 files changed, 41 insertions, 2 deletions
@@ -106,3 +106,7 @@ Building a kernel.org kernel: - Or else, if you wish to install the kernel build/debuginfo data into a place where systemtap will find it without the "-r" option: % ln -s /path/to/kernel/build/tree /lib/modules/RELEASE/build + +- Instead of using the "-r" option, you can also use the environment + variable SYSTEMTAP_RELEASE to direct systemtap to the kernel data. + @@ -425,6 +425,36 @@ main (int argc, char * const argv []) if (s_tc != NULL) s.tapset_compile_coverage = true; + const char* s_kr = getenv ("SYSTEMTAP_RELEASE"); + if (s_kr != NULL) { + if (s_kr[0] == '/') // fully specified path + { + s.kernel_build_tree = s_kr; + string version_file_name = s.kernel_build_tree + "/include/config/kernel.release"; + // The file include/config/kernel.release within the + // build tree is used to pull out the version information + ifstream version_file (version_file_name.c_str()); + if (version_file.fail ()) + { + cerr << "Missing " << version_file_name << endl; + exit(1); + } + else + { + char c; + s.kernel_release = ""; + while (version_file.get(c) && c != '\n') + s.kernel_release.push_back(c); + } + } + else + { + s.kernel_release = string (s_kr); + s.kernel_build_tree = "/lib/modules/" + s.kernel_release + "/build"; + } + } + + while (true) { int long_opt; @@ -157,11 +157,16 @@ be used to override limit parameters described below. Look for the systemtap runtime sources in the given directory. .TP .BI \-r " /DIR" -Build for kernel in given build tree. +Build for kernel in given build tree. Can also be set with the +.I SYSTEMTAP_RELEASE +environment variable. .TP .BI \-r " RELEASE" Build for kernel in build tree -.BR /lib/modules/RELEASE/build . +.BR /lib/modules/RELEASE/build . +Can also be set with the +.I SYSTEMTAP_RELEASE +environment variable. .TP .BI \-m " MODULE" Use the given name for the generated kernel object module, instead |