diff options
Diffstat (limited to 'tapsets.cxx')
| -rw-r--r-- | tapsets.cxx | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/tapsets.cxx b/tapsets.cxx index 21c9fb54..2f9dd2d0 100644 --- a/tapsets.cxx +++ b/tapsets.cxx @@ -5355,11 +5355,15 @@ struct utrace_var_expanding_copy_visitor: public var_expanding_copy_visitor string probe_name; enum utrace_derived_probe_flags flags; bool target_symbol_seen; + static bool syscall_function_added; void visit_target_symbol (target_symbol* e); }; +bool utrace_var_expanding_copy_visitor::syscall_function_added = false; + + utrace_derived_probe::utrace_derived_probe (systemtap_session &s, probe* p, probe_point* l, bool hp, string &pn, int64_t pd, @@ -5426,11 +5430,27 @@ utrace_var_expanding_copy_visitor::visit_target_symbol (target_symbol* e) // Remember that we've seen a target variable. target_symbol_seen = true; - // We're going to substitute a synthesized 'syscall_nr' function - // call for the '$syscall' reference. + // Synthesize a function to grab the syscall . + if (! syscall_function_added) + { + functiondecl *fdecl = new functiondecl; + fdecl->tok = e->tok; + embeddedcode *ec = new embeddedcode; + ec->tok = e->tok; + ec->code = string("THIS->__retvalue = __stp_user_syscall_nr(CONTEXT->regs); /* pure */"); + + fdecl->name = string("_syscall_nr_get"); + fdecl->body = ec; + fdecl->type = pe_long; + sess.functions.push_back(fdecl); + syscall_function_added = true; + } + + // We're going to substitute a synthesized '_syscall_nr_get' + // function call for the '$syscall' reference. functioncall* n = new functioncall; n->tok = e->tok; - n->function = "syscall_nr"; + n->function = "_syscall_nr_get"; n->referent = 0; // NB: must not resolve yet, to ensure inclusion in session provide <functioncall*> (this, n); |