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pa32-linux.h (MD_FALLBACK_FRAME_STATE_FOR): Define.
* gcc/config/pa/pa32-linux.h (MD_FALLBACK_FRAME_STATE_FOR): Define. * libjava/configure.in (SIGNAL_HANDLER): Use pa-signal.h for hppa. * libjava/configure: Regenerate. * libjava/configure.host: Set can_unwind_signal for hppa*-linux. * libjava/pa-signal.h: New file. From-SVN: r84344
This commit is contained in:
Randolph Chung
John David Anglin
parent
691e2db899
commit
8c5ac2c403
@ -1,3 +1,7 @@
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2004-07-08 Randolph Chung <tausq@debian.org>
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* pa32-linux.h (MD_FALLBACK_FRAME_STATE_FOR): Define.
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2004-07-09 Alexandre Oliva <aoliva@redhat.com>
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* builtins.c (fold_builtin_strncpy): Make sure len is a constant
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@ -35,3 +35,97 @@ Boston, MA 02111-1307, USA. */
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__attribute__ ((__unused__, section(".ctors"), \
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aligned(sizeof(func_ptr)))) \
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= { (func_ptr) (-1) }
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/* Do code reading to identify a signal frame, and set the frame
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state data appropriately. See unwind-dw2.c for the structs. */
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#ifdef IN_LIBGCC2
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#include <signal.h>
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#include <sys/ucontext.h>
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/* Unfortunately, because of various bugs and changes to the kernel,
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we have several cases to deal with.
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In 2.4, the signal trampoline is 4 words, and (CONTEXT)->ra should
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point directly at the beginning of the trampoline and struct rt_sigframe.
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In <= 2.6.5-rc2-pa3, the signal trampoline is 9 words, and
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(CONTEXT)->ra points at the 4th word in the trampoline structure. This
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is wrong, it should point at the 5th word. This is fixed in 2.6.5-rc2-pa4.
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To detect these cases, we first take (CONTEXT)->ra, align it to 64-bytes
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to get the beginning of the signal frame, and then check offsets 0, 4
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and 5 to see if we found the beginning of the trampoline. This will
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tell us how to locate the sigcontext structure.
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Note that with a 2.4 64-bit kernel, the signal context is not properly
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passed back to userspace so the unwind will not work correctly. */
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#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
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do { \
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unsigned long sp = (unsigned long)(CONTEXT)->ra & ~63; \
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unsigned int *pc = (unsigned int *)sp; \
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unsigned long off; \
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_Unwind_Ptr new_cfa; \
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int i; \
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struct sigcontext *sc; \
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struct rt_sigframe { \
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struct siginfo info; \
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struct ucontext uc; \
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} *frame; \
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\
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/* rt_sigreturn trampoline: \
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3419000x ldi 0, %r25 or ldi 1, %r25 (x = 0 or 2) \
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3414015a ldi __NR_rt_sigreturn, %r20 \
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e4008200 be,l 0x100(%sr2, %r0), %sr0, %r31 \
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08000240 nop */ \
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\
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if (pc[0] == 0x34190000 || pc[0] == 0x34190002) \
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off = 4*4; \
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else if (pc[4] == 0x34190000 || pc[4] == 0x34190002) \
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{ \
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pc += 4; \
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off = 10 * 4; \
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} \
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else if (pc[5] == 0x34190000 || pc[5] == 0x34190002) \
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{ \
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pc += 5; \
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off = 10 * 4; \
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} \
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else \
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break; \
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if (pc[1] != 0x3414015a \
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|| pc[2] != 0xe4008200 \
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|| pc[3] != 0x08000240) \
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break; \
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\
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frame = (struct rt_sigframe *)(sp + off); \
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sc = &frame->uc.uc_mcontext; \
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\
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new_cfa = sc->sc_gr[30]; \
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(FS)->cfa_how = CFA_REG_OFFSET; \
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(FS)->cfa_reg = 30; \
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(FS)->cfa_offset = new_cfa - (long) (CONTEXT)->cfa; \
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for (i = 1; i <= 31; i++) \
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{ \
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(FS)->regs.reg[i].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[i].loc.offset = (long)&sc->sc_gr[i] - new_cfa; \
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} \
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for (i = 4; i <= 31; i++) \
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{ \
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/* FP regs have left and right halves */ \
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(FS)->regs.reg[2*i+24].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[2*i+24].loc.offset \
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= (long)&sc->sc_fr[i] - new_cfa; \
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(FS)->regs.reg[2*i+24+1].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[2*i+24+1].loc.offset \
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= (long)&sc->sc_fr[i] + 4 - new_cfa; \
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} \
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(FS)->regs.reg[88].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[88].loc.offset = (long) &sc->sc_sar - new_cfa; \
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(FS)->regs.reg[2].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[2].loc.offset = (long) &sc->sc_iaoq[0] - new_cfa; \
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(FS)->retaddr_column = 2; \
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goto SUCCESS; \
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} while (0)
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#endif /* IN_LIBGCC2 */
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@ -1,3 +1,10 @@
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2004-07-08 Randolph Chung <tausq@debian.org>
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* configure.in (SIGNAL_HANDLER): Use pa-signal.h for hppa.
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* configure: Regenerate.
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* configure.host: Set can_unwind_signal for hppa*-linux.
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* include/pa-signal.h: New file.
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2004-07-07 Per Bothner <per@bothner.com>
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* Makefile.am: Add rules to build libgij from just gij.cc.
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3
libjava/configure
vendored
3
libjava/configure
vendored
@ -8525,6 +8525,9 @@ case "${host}" in
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# SYSDEP_SOURCES=sysdep/ia64.c
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# test -d sysdep || mkdir sysdep
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# ;;
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hppa*-*-linux*)
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SIGNAL_HANDLER=include/pa-signal.h
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;;
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ia64-*-linux*)
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SIGNAL_HANDLER=include/dwarf2-signal.h
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;;
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@ -169,6 +169,7 @@ case "${host}" in
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sparc*-linux* | \
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ia64-* | \
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x86_64*-linux* | \
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hppa*-linux* | \
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sh-linux* | sh[34]*-linux*)
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can_unwind_signal=yes
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if test x$slow_pthread_self = xyes \
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@ -1177,6 +1177,9 @@ case "${host}" in
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# SYSDEP_SOURCES=sysdep/ia64.c
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# test -d sysdep || mkdir sysdep
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# ;;
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hppa*-*-linux*)
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SIGNAL_HANDLER=include/pa-signal.h
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;;
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ia64-*-linux*)
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SIGNAL_HANDLER=include/dwarf2-signal.h
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;;
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61
libjava/include/pa-signal.h
Normal file
61
libjava/include/pa-signal.h
Normal file
@ -0,0 +1,61 @@
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// pa-signal.h - Catch runtime signals and turn them into exceptions.
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/* Copyright (C) 1998, 1999, 2000 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#ifndef JAVA_SIGNAL_H
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#define JAVA_SIGNAL_H 1
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#include <signal.h>
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#include <ucontext.h>
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#include <sys/syscall.h>
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#define HANDLE_SEGV 1
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#define HANDLE_FPE 1
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#define SIGNAL_HANDLER(_name) \
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static void _Jv_##_name (int _dummy, siginfo_t *_info, void *arg)
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#define MAKE_THROW_FRAME(_exception) \
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do \
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{ \
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struct ucontext *uc = (struct ucontext *)arg; \
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struct sigcontext *sc = &uc->uc_mcontext; \
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(void)_dummy; \
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(void)_info; \
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/* Advance the program counter so that it is after the start \
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of the instruction: the exception handler expects \
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the PC to point to the instruction after a call. */ \
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sc->sc_iaoq[0] = sc->sc_iaoq[1]; \
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sc->sc_iaoq[1] += 4; \
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} \
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while (0)
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#define INIT_SEGV \
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do \
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{ \
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struct sigaction act; \
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act.sa_sigaction = _Jv_catch_segv; \
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sigemptyset (&act.sa_mask); \
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act.sa_flags = SA_SIGINFO; \
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syscall (SYS_rt_sigaction, SIGSEGV, &act, NULL, _NSIG / 8); \
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} \
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while (0)
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#define INIT_FPE \
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do \
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{ \
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struct sigaction act; \
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act.sa_sigaction = _Jv_catch_fpe; \
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sigemptyset (&act.sa_mask); \
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act.sa_flags = SA_SIGINFO; \
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syscall (SYS_rt_sigaction, SIGFPE, &act, NULL, _NSIG / 8); \
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} \
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while (0)
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#endif /* JAVA_SIGNAL_H */
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