newlib-cygwin/winsup/cygwin/scripts/gentls_offsets

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#!/usr/bin/env bash
#set -x
input_file=$1
output_file=$2
tmp_file=/tmp/${output_file}.$$
trap "rm -f ${tmp_file}" 0 1 2 15
# Preprocess cygtls.h and filter out only the member lines from
# class _cygtls to generate an input file for the cross compiler
# to generate the member offsets for tlsoffsets-$(target_cpu).h.
${CXXCOMPILE} -E -P "${input_file}" 2> /dev/null | \
gawk '
BEGIN {
# marker is used to split out the member lines from class _cygtls
marker=0;
# Prepare the input file for the subsequent compiler run.
# Prepend value of __CYGTLS_PADSIZE__ so we can compute the offsets
# up and down at the same time
print "#include \"winsup.h\"";
print "#include \"cygtls.h\"";
print "extern \"C\" const uint32_t __CYGTLS__start_offset = __CYGTLS_PADSIZE__;";
}
/^class _cygtls$/ {
# Ok, bump marker, next we are expecting a "public:" line
marker=1;
}
/^public:/ {
# We are only interested in the lines between the first (marker == 2)
# and the second (marker == 3) "public:" line in class _cygtls. These
# are where the members are defined.
if (marker > 0) ++marker;
if (marker > 2) exit;
}
{
if (marker == 2 && $1 != "public:") {
# Filter out function names
$0 = gensub (/\(\*(\w+)\)\s*\([^\)]*\)/, "\\1", "g");
# Filter out leading asterisk
$NF = gensub (/^\**(\w+)/, "\\1", "g", $NF);
# Filter out trailing array expression
$NF = gensub (/(\w+)\s*\[[^\]]*\]/, "\\1", "g", $NF);
$NF = gensub (/(\w+);/, "\\1", "g", $NF);
print "extern \"C\" const uint32_t __CYGTLS__" $NF " = offsetof (class _cygtls, " $NF ");";
}
}
' | \
# Now run the compiler to generate an assembler file.
${CXXCOMPILE} -x c++ -g0 -S - -o ${tmp_file} && \
# The assembler file consists of lines like these:
#
# __CYGTLS__foo
# .long 42
# .globl __CYGTLS__foo
# .align 4
#
# From this info, generate the tlsoffsets file.
start_offset=$(gawk '\
BEGIN {
varname=""
}
/^__CYGTLS__/ {
varname = gensub (/__CYGTLS__(\w+):/, "\\1", "g");
}
/\s*\.long\s+/ {
if (length (varname) > 0) {
if (varname == "start_offset") {
print $2;
}
varname = "";
}
}
' ${tmp_file}) && \
gawk -v start_offset="$start_offset" '\
BEGIN {
varname=""
}
/^__CYGTLS__/ {
varname = gensub (/__CYGTLS__(\w+):/, "\\1", "g");
}
/\s*\.space\s*4/ {
if (length (varname) > 0) {
printf (".equ _cygtls.%s, %d\n", varname, -start_offset);
printf (".equ _cygtls.%s_p, 0\n", varname);
varname = "";
Eliminate use of sigframe and sigthread throughout. * Makefile.in (DLL_OFILES): Add sigfe.o. Remove reliance on cygwin.def from cygwin0.dll dependency since dependence on sigfe.o implies that. Generate def file on the fly using 'gendef'. * configure.in: Don't auto-generate cygwin.def. * configure: Regenerate. * cygwin.din: Add SIGFE stuff where appropriate. * dcrt0.cc (dll_crt0_1): Initialize cygwin tls early in process startup. Set _main_tls to address of the main thread's cygwin tls. * debug.h: Remove now unneeded WFSO and WFMO declarations. * exceptions.cc (_last_thread): Define. (set_thread_state_for_signals): New function. (reset_thread_exception_for_signals): Ditto. (init_thread_for_signals): Ditto. (delete_thread_for_signals): Ditto. (capture_thread_for_signals): Ditto. (handle_exceptions): Set return address explicitly for exceptions prior to calling sig_send. (interrupt_on_return): Eliminate. (setup_handler): Add preliminary implementation for dealing with thread-specific signals by querying _main_tls. (signal_exit): Use cygthread::main_thread_id instead of mainthread.id. (call_signal_handler_now): For now, just handle the main thread. * fork.cc (vfork): Save and restore main _my_tls. * gendef: New file. Generates def file and sigfe.s file. * gentls_offsets: New file. Generates offsets for perl to use in sigfe.s. * how-signals-work.txt: Mention that info is obsolete. * init.cc (dll_entry): Initialize cygwin tls storage here. * miscfuncs.cc (low_priority_sleep): Make a C function for easier calling from asm. * perthread.h (vfork_save::tls): New element. * signal.cc (nanosleep): Replace previous use of sigframe.call_signal_handler_now with straight call to call_signal_handler_now. (abort): Ditto. * syscalls.cc (readv): Ditto. * termios.cc (tcsetattr): Ditto. * wait.cc (wait4): Ditto. * sigproc.cc (sig_dispatch_pending): Ditto. (sig_send): Ditto. * sigproc.h: Declare call_signal_handler_now. * thread.cc (pthread::thread_init_wrapper): Initialize cygwin tls. Remove obsolete and unworking signal stuff. * thread.h (verifyable_object::sigs): Eliminate. (verifyable_object::sigmask): Eliminate. (verifyable_object::sigtodo): Eliminate. (verifyable_object::exit): Make attribute noreturn. (verifyable_object::thread_init_wrapper): Ditto. (pthread_null::exit): Ditto. * winbase.h (__stackbase): Always define. * winsup.h (low_priority_sleep): Declare as a "C" function. * include/cygwin/version.h: Bump API version to reflect sigwait export. * include/sys/queue.h: Protect SLIST_ENTRY from previous declaration. * signal.cc (sigwait): Implement. * select.cc (fhandler_base::ready_for_read): Add debugging output. * devices.h: Define more device pointers via their storage. * devices.in: Don't parse things like /dev/inet/tcp, as they really have no meaning. * devices.cc: Regenerate. * gendevices: Set proper protection for output file. * cygtls.h: New file. * gendef: New file. * gentls_offsets: New file. * tlsoffsets.h: New file. Autogenerated. * config/i386/longjmp.c: Remove. File subsumed by gendef output. * config/i386/makefrag: Remove obsolete file. * fhandler.cc: Remove spurious access_worker declaration. * spawn.cc (spawnve): Make debugging output more accurate. * cygwin-gperf: Remove. * devices.cc: Remove.
2003-11-29 04:55:59 +08:00
}
}
/\s*\.long\s+/ {
if (length (varname) > 0) {
if (varname == "start_offset") {
printf (".equ _cygtls.%s, -%u\n", varname, start_offset);
} else {
value = $2;
printf (".equ _cygtls.%s, %d\n", varname, value - start_offset);
printf (".equ _cygtls.%s_p, %d\n", varname, value);
}
varname = "";
Eliminate use of sigframe and sigthread throughout. * Makefile.in (DLL_OFILES): Add sigfe.o. Remove reliance on cygwin.def from cygwin0.dll dependency since dependence on sigfe.o implies that. Generate def file on the fly using 'gendef'. * configure.in: Don't auto-generate cygwin.def. * configure: Regenerate. * cygwin.din: Add SIGFE stuff where appropriate. * dcrt0.cc (dll_crt0_1): Initialize cygwin tls early in process startup. Set _main_tls to address of the main thread's cygwin tls. * debug.h: Remove now unneeded WFSO and WFMO declarations. * exceptions.cc (_last_thread): Define. (set_thread_state_for_signals): New function. (reset_thread_exception_for_signals): Ditto. (init_thread_for_signals): Ditto. (delete_thread_for_signals): Ditto. (capture_thread_for_signals): Ditto. (handle_exceptions): Set return address explicitly for exceptions prior to calling sig_send. (interrupt_on_return): Eliminate. (setup_handler): Add preliminary implementation for dealing with thread-specific signals by querying _main_tls. (signal_exit): Use cygthread::main_thread_id instead of mainthread.id. (call_signal_handler_now): For now, just handle the main thread. * fork.cc (vfork): Save and restore main _my_tls. * gendef: New file. Generates def file and sigfe.s file. * gentls_offsets: New file. Generates offsets for perl to use in sigfe.s. * how-signals-work.txt: Mention that info is obsolete. * init.cc (dll_entry): Initialize cygwin tls storage here. * miscfuncs.cc (low_priority_sleep): Make a C function for easier calling from asm. * perthread.h (vfork_save::tls): New element. * signal.cc (nanosleep): Replace previous use of sigframe.call_signal_handler_now with straight call to call_signal_handler_now. (abort): Ditto. * syscalls.cc (readv): Ditto. * termios.cc (tcsetattr): Ditto. * wait.cc (wait4): Ditto. * sigproc.cc (sig_dispatch_pending): Ditto. (sig_send): Ditto. * sigproc.h: Declare call_signal_handler_now. * thread.cc (pthread::thread_init_wrapper): Initialize cygwin tls. Remove obsolete and unworking signal stuff. * thread.h (verifyable_object::sigs): Eliminate. (verifyable_object::sigmask): Eliminate. (verifyable_object::sigtodo): Eliminate. (verifyable_object::exit): Make attribute noreturn. (verifyable_object::thread_init_wrapper): Ditto. (pthread_null::exit): Ditto. * winbase.h (__stackbase): Always define. * winsup.h (low_priority_sleep): Declare as a "C" function. * include/cygwin/version.h: Bump API version to reflect sigwait export. * include/sys/queue.h: Protect SLIST_ENTRY from previous declaration. * signal.cc (sigwait): Implement. * select.cc (fhandler_base::ready_for_read): Add debugging output. * devices.h: Define more device pointers via their storage. * devices.in: Don't parse things like /dev/inet/tcp, as they really have no meaning. * devices.cc: Regenerate. * gendevices: Set proper protection for output file. * cygtls.h: New file. * gendef: New file. * gentls_offsets: New file. * tlsoffsets.h: New file. Autogenerated. * config/i386/longjmp.c: Remove. File subsumed by gendef output. * config/i386/makefrag: Remove obsolete file. * fhandler.cc: Remove spurious access_worker declaration. * spawn.cc (spawnve): Make debugging output more accurate. * cygwin-gperf: Remove. * devices.cc: Remove.
2003-11-29 04:55:59 +08:00
}
}
' ${tmp_file} > "${output_file}"
# Check if the `context' member is 16 bytes aligned. Delete output_file
# and bail out with error if not.
MOD=$(awk '/_cygtls.context_p/{ print $3 % 16; }' "${output_file}")
if [ $MOD -ne 0 ]
then
echo "Error: _cygtls.context member is not 16 bytes aligned!"
rm "${output_file}"
exit 1
fi