AuxvParser::AuxvParser(int pid_, unsigned addr_size_) :
pid(pid_),
ref_count(0),
interpreter_base(0x0),
vsyscall_base(0x0),
vsyscall_text(0x0),
vsyscall_end(0x0),
found_vsyscall(false),
phdr(0x0),
page_size(0x0),
addr_size(addr_size_)
{
create_err = !readAuxvInfo();
}
Frame process::preStackWalkInit(Frame startFrame)
{
/* Do a special check for the vsyscall page. Silently drop
the page if it exists. The IA-64 doesn't use DWARF to unwind out of
the vsyscall page, so calcVsyscallFrame() is overkill.
*/
if( getVsyscallStart() == 0x0 ) {
if( ! readAuxvInfo() ) {
/* We're probably on Linux 2.4; use default values. */
setVsyscallRange( 0xffffffffffffe000, 0xfffffffffffff000 );
setVsyscallData( NULL );
}
}
Address next_pc = startFrame.getPC();
if (next_pc >= getVsyscallStart() && next_pc < getVsyscallEnd()) {
return startFrame.getCallerFrame();
}
return startFrame;
}
