[haiku-commits] r41642 - in haiku/branches/developer/bonefish/signals: headers/private/kernel/arch/x86 headers/private/system headers/private/system/arch/x86 src/system/kernel/arch/x86 src/system/libroot ...
- From: ingo_weinhold@xxxxxx
- To: haiku-commits@xxxxxxxxxxxxx
- Date: Sun, 22 May 2011 02:19:21 +0200 (CEST)
Author: bonefish
Date: 2011-05-22 02:19:20 +0200 (Sun, 22 May 2011)
New Revision: 41642
Changeset: https://dev.haiku-os.org/changeset/41642
Added:
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/x86_signals_asm.S
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/sigaction.cpp
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/signal.cpp
Removed:
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/sigaction.c
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/signal.c
Modified:
haiku/branches/developer/bonefish/signals/headers/private/kernel/arch/x86/arch_thread.h
haiku/branches/developer/bonefish/signals/headers/private/system/arch/x86/arch_commpage_defs.h
haiku/branches/developer/bonefish/signals/headers/private/system/signal_defs.h
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/Jamfile
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/arch_interrupts.S
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/arch_thread.cpp
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/asm_offsets.cpp
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/x86_signals.cpp
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/x86_signals.h
haiku/branches/developer/bonefish/signals/src/system/libroot/libroot_versions
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/Jamfile
Log:
* Added private SA_BEOS_COMPATIBLE_HANDLER sigaction::sa_flags flag to indicate
that the signal handler shall be invoked in a BeOS compatible manner.
* Used ELF symbol versioning to provide backwards compatible versions of
signal() and sigaction(), that set the SA_BEOS_COMPATIBLE_HANDLER flag.
* Added signal handler wrapper function x86_signal_frame_function_beos(), which
works similar to x86_signal_frame_function() (i.e. is also copied to the
commpage, calls the signal handler and the _kern_restore_signal_frame()
syscall afterwards), but calls the signal handler in a BeOS compatible manner.
That is it copies the vregs onto the stack (passing them by value) and back
afterwards. This wrapper function is used for sigactions with the
SA_BEOS_COMPATIBLE_HANDLER flag.
Modified:
haiku/branches/developer/bonefish/signals/headers/private/kernel/arch/x86/arch_thread.h
===================================================================
---
haiku/branches/developer/bonefish/signals/headers/private/kernel/arch/x86/arch_thread.h
2011-05-22 00:05:39 UTC (rev 41641)
+++
haiku/branches/developer/bonefish/signals/headers/private/kernel/arch/x86/arch_thread.h
2011-05-22 00:19:20 UTC (rev 41642)
@@ -24,9 +24,6 @@
void x86_restart_syscall(struct iframe* frame);
-void i386_return_from_signal();
-void i386_end_return_from_signal();
-
// override empty macro
#undef arch_syscall_64_bit_return_value
void arch_syscall_64_bit_return_value(void);
Modified:
haiku/branches/developer/bonefish/signals/headers/private/system/arch/x86/arch_commpage_defs.h
===================================================================
---
haiku/branches/developer/bonefish/signals/headers/private/system/arch/x86/arch_commpage_defs.h
2011-05-22 00:05:39 UTC (rev 41641)
+++
haiku/branches/developer/bonefish/signals/headers/private/system/arch/x86/arch_commpage_defs.h
2011-05-22 00:19:20 UTC (rev 41642)
@@ -14,6 +14,8 @@
#define COMMPAGE_ENTRY_X86_MEMSET (COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 2)
#define COMMPAGE_ENTRY_X86_SIGNAL_HANDLER \
(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 3)
+#define COMMPAGE_ENTRY_X86_SIGNAL_HANDLER_BEOS \
+
(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 4)
#define ARCH_USER_COMMPAGE_ADDR (0xffff0000)
Modified:
haiku/branches/developer/bonefish/signals/headers/private/system/signal_defs.h
===================================================================
---
haiku/branches/developer/bonefish/signals/headers/private/system/signal_defs.h
2011-05-22 00:05:39 UTC (rev 41641)
+++
haiku/branches/developer/bonefish/signals/headers/private/system/signal_defs.h
2011-05-22 00:19:20 UTC (rev 41642)
@@ -25,4 +25,10 @@
// use only)
+// additional sigaction::sa_flags flag
+#define SA_BEOS_COMPATIBLE_HANDLER 0x80000000
+ // BeOS compatible signal handler, i.e. the vregs argument is passed
+ // per-value, not per-pointer
+
+
#endif /* _SYSTEM_SIGNAL_DEFS_H */
Modified:
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/Jamfile
===================================================================
---
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/Jamfile
2011-05-22 00:05:39 UTC (rev 41641)
+++
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/Jamfile
2011-05-22 00:19:20 UTC (rev 41642)
@@ -42,6 +42,7 @@
syscall.S
vm86.cpp
x86_signals.cpp
+ x86_signals_asm.S
x86_syscalls.cpp
# paging
Modified:
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/arch_interrupts.S
===================================================================
---
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/arch_interrupts.S
2011-05-22 00:05:39 UTC (rev 41641)
+++
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/arch_interrupts.S
2011-05-22 00:19:20 UTC (rev 41642)
@@ -798,25 +798,6 @@
FUNCTION_END(x86_sysenter)
-/*! Is copied to the signal stack call to restore the original frame when
- the signal handler exits.
- The copying code (in arch_thread.c::arch_setup_signal_frame()) copies
- everything between the i386_return_from_signal and
i386_end_return_from_signal
- symbols.
-*/
-FUNCTION(i386_return_from_signal):
- addl $12, %esp // Flushes the 3 arguments to sa_handler
- movl $SYSCALL_RESTORE_SIGNAL_FRAME, %eax
- // This syscall will restore the cpu context to the
- // one existing before calling the signal handler
- movl $0, %ecx
- lea 4(%esp), %edx
- int $99
- ret
-FUNCTION_END(i386_return_from_signal)
-SYMBOL(i386_end_return_from_signal):
-
-
/*! void i386_restore_frame_from_syscall(struct iframe iframe);
Pops the regs of the iframe from the stack to make it current and then
return to userland.
Modified:
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/arch_thread.cpp
===================================================================
---
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/arch_thread.cpp
2011-05-22 00:05:39 UTC (rev 41641)
+++
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/arch_thread.cpp
2011-05-22 00:19:20 UTC (rev 41642)
@@ -559,7 +559,8 @@
// Adjust the iframe's esp and eip, so that the thread will continue
with
// the prepared stack, executing the signal handler wrapper function.
frame->user_esp = (addr_t)userStack;
- frame->eip = x86_get_user_signal_handler_wrapper();
+ frame->eip = x86_get_user_signal_handler_wrapper(
+ (action->sa_flags & SA_BEOS_COMPATIBLE_HANDLER) != 0);
return B_OK;
}
Modified:
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/asm_offsets.cpp
===================================================================
---
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/asm_offsets.cpp
2011-05-22 00:05:39 UTC (rev 41641)
+++
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/asm_offsets.cpp
2011-05-22 00:19:20 UTC (rev 41642)
@@ -13,6 +13,7 @@
#include <arch_cpu.h>
#include <cpu.h>
+#include <ksignal.h>
#include <ksyscalls.h>
#include <thread_types.h>
@@ -66,4 +67,20 @@
memcpy);
DEFINE_OFFSET_MACRO(X86_OPTIMIZED_FUNCTIONS, x86_optimized_functions,
memset);
+
+ // struct signal_frame_data
+ DEFINE_SIZEOF_MACRO(SIGNAL_FRAME_DATA, signal_frame_data);
+ DEFINE_OFFSET_MACRO(SIGNAL_FRAME_DATA, signal_frame_data, info);
+ DEFINE_OFFSET_MACRO(SIGNAL_FRAME_DATA, signal_frame_data, context);
+ DEFINE_OFFSET_MACRO(SIGNAL_FRAME_DATA, signal_frame_data, user_data);
+ DEFINE_OFFSET_MACRO(SIGNAL_FRAME_DATA, signal_frame_data, handler);
+
+ // struct ucontext_t
+ DEFINE_OFFSET_MACRO(UCONTEXT_T, __ucontext_t, uc_mcontext);
+
+ // struct vregs
+ DEFINE_SIZEOF_MACRO(VREGS, vregs);
+
+ // struct siginfo_t
+ DEFINE_OFFSET_MACRO(SIGINFO_T, __siginfo_t, si_signo);
}
Modified:
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/x86_signals.cpp
===================================================================
---
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/x86_signals.cpp
2011-05-22 00:05:39 UTC (rev 41641)
+++
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/x86_signals.cpp
2011-05-22 00:19:20 UTC (rev 41642)
@@ -18,6 +18,10 @@
#include "syscall_numbers.h"
+// implemented in assembly
+extern "C" void x86_signal_frame_function_beos(signal_frame_data* frameData);
+
+
extern "C" void
x86_signal_frame_function(signal_frame_data* frameData)
{
@@ -36,14 +40,12 @@
handler(frameData->info.si_signo, &frameData->info,
&frameData->context, frameData->user_data);
} else {
- // Simple handler function -- we call it BeOS style, i.e. with
- // additional user data pointer and vregs parameters.
- // Note that the vregs* parameter is not a pointer in the
handler
- // prototype as documented in BeOS. At least for x86 that
doesn't make
- // a difference for the callee, though, as it always gets a
pointer. The
- // difference is on the caller side only, where the object
would have to
- // be copied in the non-pointer case. We don't want that, since
the
- // vregs changes the handler makes must be applied when it
returns.
+ // Simple handler function -- we call it with additional user
data
+ // pointer and vregs parameters. Note that unlike in BeOS the
last
+ // parameter is a pointer to a vregs structure, while in BeOS
the
+ // structure was passed be value. For setting up a BeOS binary
+ // compatible signal handler call
x86_signal_frame_function_beos() is
+ // used instead.
void (*handler)(int, void*, vregs*)
= (void (*)(int, void*, vregs*))frameData->handler;
handler(frameData->info.si_signo, frameData->user_data,
@@ -71,34 +73,53 @@
}
-void
-x86_initialize_commpage_signal_handler()
+static void
+register_signal_handler_function(const char* functionName, int32 commpageIndex,
+ const char* commpageSymbolName, addr_t expectedAddress)
{
// look up the x86_signal_frame_function() symbol -- we have its
address,
// but also need its size
elf_symbol_info symbolInfo;
- if (elf_lookup_kernel_symbol("x86_signal_frame_function", &symbolInfo)
+ if (elf_lookup_kernel_symbol(functionName, &symbolInfo)
!= B_OK) {
panic("x86_initialize_commpage_signal_handler(): Failed to find
"
- "signal frame function!");
+ "signal frame function \"%s\"!", functionName);
}
- ASSERT((addr_t)&x86_signal_frame_function == symbolInfo.address);
+ ASSERT(expectedAddress == symbolInfo.address);
// fill in the commpage table entry
- fill_commpage_entry(COMMPAGE_ENTRY_X86_SIGNAL_HANDLER,
- (void*)symbolInfo.address, symbolInfo.size);
+ fill_commpage_entry(commpageIndex, (void*)symbolInfo.address,
+ symbolInfo.size);
- // add syscall to the commpage image
+ // add symbol to the commpage image
image_id image = get_commpage_image();
- elf_add_memory_image_symbol(image, "commpage_signal_handler",
-
((addr_t*)USER_COMMPAGE_ADDR)[COMMPAGE_ENTRY_X86_SIGNAL_HANDLER],
- symbolInfo.size, B_SYMBOL_TYPE_TEXT);
+ elf_add_memory_image_symbol(image, commpageSymbolName,
+ ((addr_t*)USER_COMMPAGE_ADDR)[commpageIndex], symbolInfo.size,
+ B_SYMBOL_TYPE_TEXT);
}
+void
+x86_initialize_commpage_signal_handler()
+{
+ // standard handler
+ register_signal_handler_function("x86_signal_frame_function",
+ COMMPAGE_ENTRY_X86_SIGNAL_HANDLER, "commpage_signal_handler",
+ (addr_t)&x86_signal_frame_function);
+
+ // handler for BeOS backwards compatibility
+ register_signal_handler_function("x86_signal_frame_function_beos",
+ COMMPAGE_ENTRY_X86_SIGNAL_HANDLER_BEOS,
"commpage_signal_handler_beos",
+ (addr_t)&x86_signal_frame_function_beos);
+}
+
+
addr_t
-x86_get_user_signal_handler_wrapper()
+x86_get_user_signal_handler_wrapper(bool beosHandler)
{
- return ((addr_t*)USER_COMMPAGE_ADDR)[COMMPAGE_ENTRY_X86_SIGNAL_HANDLER];
+ int32 index = beosHandler
+ ? COMMPAGE_ENTRY_X86_SIGNAL_HANDLER_BEOS
+ : COMMPAGE_ENTRY_X86_SIGNAL_HANDLER;
+ return ((addr_t*)USER_COMMPAGE_ADDR)[index];
}
Modified:
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/x86_signals.h
===================================================================
---
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/x86_signals.h
2011-05-22 00:05:39 UTC (rev 41641)
+++
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/x86_signals.h
2011-05-22 00:19:20 UTC (rev 41642)
@@ -10,7 +10,7 @@
void x86_initialize_commpage_signal_handler();
-addr_t x86_get_user_signal_handler_wrapper();
+addr_t x86_get_user_signal_handler_wrapper(bool beosHandler);
#endif // _KERNEL_ARCH_X86_SIGNALS_H
Added:
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/x86_signals_asm.S
===================================================================
---
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/x86_signals_asm.S
(rev 0)
+++
haiku/branches/developer/bonefish/signals/src/system/kernel/arch/x86/x86_signals_asm.S
2011-05-22 00:19:20 UTC (rev 41642)
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2011, Ingo Weinhold, ingo_weinhold@xxxxxxx
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <asm_defs.h>
+#include <commpage_defs.h>
+
+#include "asm_offsets.h"
+#include "syscall_numbers.h"
+
+
+/*! \fn void x86_signal_frame_function_beos(signal_frame_data* frameData)
+ \brief Wrapper function for BeOS-style signal handler functions.
+ \param frameData The signal frame data.
+*/
+FUNCTION(x86_signal_frame_function_beos):
+ // set up a stack frame
+ push %ebp
+ mov %esp, %ebp
+
+ // Move our parameter to %esi, so we can conveniently work with it. Note
+ // that we're free to use non-scratch registers without saving them,
since
+ // we don't have any caller to save them for. The caller will restore
the
+ // interrupted environment anyway.
+ mov 8(%ebp), %esi
+
+ // push the parameters for the handler function
+
+ // make space for the vregs parameter
+ lea -VREGS_sizeof(%esp), %esp
+ mov %esp, %edi
+
+ // copy the vregs via memcpy()
+ pushl $VREGS_sizeof
+ lea SIGNAL_FRAME_DATA_context +
UCONTEXT_T_uc_mcontext(%esi), %eax
+ push %eax
+ push %edi
+ movl USER_COMMPAGE_ADDR + 4 * COMMPAGE_ENTRY_X86_MEMCPY, %eax
+ call *%eax
+ addl $12, %esp
+
+ // the vregs are on the stack -- push user data and signal number
+ movl SIGNAL_FRAME_DATA_user_data(%esi), %eax
+ push %eax
+ movl SIGNAL_FRAME_DATA_info+SIGINFO_T_si_signo(%esi), %eax
+ push %eax
+
+ // call the signal handler
+ movl SIGNAL_FRAME_DATA_handler(%esi), %eax
+ call *%eax
+ addl $8, %esp // pop only signal number and user data
arguments
+
+ // copy the vregs back to the frameData structure
+ pushl $VREGS_sizeof
+ push %edi
+ lea SIGNAL_FRAME_DATA_context +
UCONTEXT_T_uc_mcontext(%esi), %eax
+ push %eax
+ movl USER_COMMPAGE_ADDR + 4 * COMMPAGE_ENTRY_X86_MEMCPY, %eax
+ call *%eax
+ addl $12 + VREGS_sizeof, %esp
+
+ // call the _kern_restore_signal_frame() syscall -- does not return
(here)
+ pushl %esi
+ pushl $0 // dummy return value
+ movl $SYSCALL_RESTORE_SIGNAL_FRAME, %eax
+ int $99
+
+ // never gets here
+FUNCTION_END(x86_signal_frame_function_beos)
Modified:
haiku/branches/developer/bonefish/signals/src/system/libroot/libroot_versions
===================================================================
---
haiku/branches/developer/bonefish/signals/src/system/libroot/libroot_versions
2011-05-22 00:05:39 UTC (rev 41641)
+++
haiku/branches/developer/bonefish/signals/src/system/libroot/libroot_versions
2011-05-22 00:19:20 UTC (rev 41642)
@@ -3,3 +3,6 @@
LIBROOT_1_ALPHA1 {
} LIBROOT_BASE;
+
+LIBROOT_1_ALPHA3 {
+} LIBROOT_1_ALPHA1;
Modified:
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/Jamfile
===================================================================
---
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/Jamfile
2011-05-22 00:05:39 UTC (rev 41641)
+++
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/Jamfile
2011-05-22 00:19:20 UTC (rev 41642)
@@ -12,12 +12,12 @@
send_signal.c
set_signal_disposition.cpp
set_signal_stack.c
- sigaction.c
+ sigaction.cpp
sigaltstack.c
sighold.cpp
sigignore.cpp
siginterrupt.cpp
- signal.c
+ signal.cpp
sigpause.cpp
sigpending.c
sigprocmask.c
Copied:
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/sigaction.cpp
(from rev 41601,
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/sigaction.c)
===================================================================
---
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/sigaction.cpp
(rev 0)
+++
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/sigaction.cpp
2011-05-22 00:19:20 UTC (rev 41642)
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2002-2011, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT license.
+ *
+ * Author:
+ * Daniel Reinhold, danielre@xxxxxxxxxxxx
+ * Ingo Weinhod, ingo_weinhold@xxxxxx
+ */
+
+
+#include <errno.h>
+#include <signal.h>
+
+#include <syscall_utils.h>
+
+#include <signal_defs.h>
+#include <symbol_versioning.h>
+#include <syscalls.h>
+
+
+extern "C" int
+__sigaction_beos(int signal, const struct sigaction* action,
+ struct sigaction* oldAction)
+{
+ // If a new action is given, copy it and set the
SA_BEOS_COMPATIBLE_HANDLER
+ // flag to indicate BeOS compatible behavior.
+ struct sigaction newAction;
+ if (action != NULL) {
+ newAction = *action;
+ newAction.sa_flags |= SA_BEOS_COMPATIBLE_HANDLER;
+ action = &newAction;
+ }
+
+ status_t status = _kern_sigaction(signal, action, oldAction);
+ if (status != B_OK)
+ RETURN_AND_SET_ERRNO(status);
+
+ // clear SA_BEOS_COMPATIBLE_HANDLER in the returned action
+ if (oldAction != NULL)
+ oldAction->sa_flags &= ~(int)SA_BEOS_COMPATIBLE_HANDLER;
+
+ return 0;
+}
+
+
+extern "C" int
+__sigaction_current(int signal, const struct sigaction* action,
+ struct sigaction* oldAction)
+{
+ RETURN_AND_SET_ERRNO(_kern_sigaction(signal, action, oldAction));
+}
+
+
+DEFINE_LIBROOT_KERNEL_SYMBOL_VERSION("__sigaction_beos", "sigaction@", "BASE");
+
+DEFINE_LIBROOT_KERNEL_SYMBOL_VERSION("__sigaction_current", "sigaction@@",
+ "1_ALPHA3");
Copied:
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/signal.cpp
(from rev 41601,
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/signal.c)
===================================================================
---
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/signal.cpp
(rev 0)
+++
haiku/branches/developer/bonefish/signals/src/system/libroot/posix/signal/signal.cpp
2011-05-22 00:19:20 UTC (rev 41642)
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2002-2011, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT license.
+ *
+ * Author:
+ * Daniel Reinhold (danielre@xxxxxxxxxxxx)
+ */
+
+
+#include <signal.h>
+#include <stdio.h>
+
+#include <symbol_versioning.h>
+
+
+extern "C" int __sigaction_beos(int signal, const struct sigaction* action,
+ struct sigaction* oldAction);
+extern "C" int __sigaction_current(int signal, const struct sigaction* action,
+ struct sigaction* oldAction);
+
+
+extern "C" __sighandler_t
+__signal_beos(int sig, __sighandler_t signalHandler)
+{
+ struct sigaction newAction, oldAction;
+
+ // setup the replacement sigaction
+ newAction.sa_handler = signalHandler;
+ newAction.sa_mask = 0;
+ newAction.sa_flags = 0;
+
+ if (__sigaction_beos(sig, &newAction, &oldAction) != 0)
+ return SIG_ERR;
+
+ // success, return the original handler
+ return oldAction.sa_handler;
+}
+
+
+extern "C" __sighandler_t
+__signal_current(int sig, __sighandler_t signalHandler)
+{
+ struct sigaction newAction, oldAction;
+
+ // setup the replacement sigaction
+ newAction.sa_handler = signalHandler;
+ newAction.sa_mask = 0;
+ newAction.sa_flags = 0;
+
+ if (__sigaction_current(sig, &newAction, &oldAction) != 0)
+ return SIG_ERR;
+
+ // success, return the original handler
+ return oldAction.sa_handler;
+}
+
+
+DEFINE_LIBROOT_KERNEL_SYMBOL_VERSION("__signal_beos", "signal@", "BASE");
+
+DEFINE_LIBROOT_KERNEL_SYMBOL_VERSION("__signal_current", "signal@@",
+ "1_ALPHA3");
Other related posts:
- » [haiku-commits] r41642 - in haiku/branches/developer/bonefish/signals: headers/private/kernel/arch/x86 headers/private/system headers/private/system/arch/x86 src/system/kernel/arch/x86 src/system/libroot ... - ingo_weinhold
