From 8c5ac2c403729f7a2a463cabf04f46e3f886d604 Mon Sep 17 00:00:00 2001 From: Randolph Chung Date: Fri, 9 Jul 2004 03:39:35 +0000 Subject: [PATCH] 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 --- gcc/ChangeLog | 4 ++ gcc/config/pa/pa32-linux.h | 94 +++++++++++++++++++++++++++++++++++++ libjava/ChangeLog | 7 +++ libjava/configure | 3 ++ libjava/configure.host | 1 + libjava/configure.in | 3 ++ libjava/include/pa-signal.h | 61 ++++++++++++++++++++++++ 7 files changed, 173 insertions(+) create mode 100644 libjava/include/pa-signal.h diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 04f778f7bcc..fb2205c3d30 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2004-07-08 Randolph Chung + + * pa32-linux.h (MD_FALLBACK_FRAME_STATE_FOR): Define. + 2004-07-09 Alexandre Oliva * builtins.c (fold_builtin_strncpy): Make sure len is a constant diff --git a/gcc/config/pa/pa32-linux.h b/gcc/config/pa/pa32-linux.h index 49439594920..14cc2cf9159 100644 --- a/gcc/config/pa/pa32-linux.h +++ b/gcc/config/pa/pa32-linux.h @@ -35,3 +35,97 @@ Boston, MA 02111-1307, USA. */ __attribute__ ((__unused__, section(".ctors"), \ aligned(sizeof(func_ptr)))) \ = { (func_ptr) (-1) } + +/* Do code reading to identify a signal frame, and set the frame + state data appropriately. See unwind-dw2.c for the structs. */ + +#ifdef IN_LIBGCC2 +#include +#include + +/* Unfortunately, because of various bugs and changes to the kernel, + we have several cases to deal with. + + In 2.4, the signal trampoline is 4 words, and (CONTEXT)->ra should + point directly at the beginning of the trampoline and struct rt_sigframe. + + In <= 2.6.5-rc2-pa3, the signal trampoline is 9 words, and + (CONTEXT)->ra points at the 4th word in the trampoline structure. This + is wrong, it should point at the 5th word. This is fixed in 2.6.5-rc2-pa4. + + To detect these cases, we first take (CONTEXT)->ra, align it to 64-bytes + to get the beginning of the signal frame, and then check offsets 0, 4 + and 5 to see if we found the beginning of the trampoline. This will + tell us how to locate the sigcontext structure. + + Note that with a 2.4 64-bit kernel, the signal context is not properly + passed back to userspace so the unwind will not work correctly. */ +#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \ + do { \ + unsigned long sp = (unsigned long)(CONTEXT)->ra & ~63; \ + unsigned int *pc = (unsigned int *)sp; \ + unsigned long off; \ + _Unwind_Ptr new_cfa; \ + int i; \ + struct sigcontext *sc; \ + struct rt_sigframe { \ + struct siginfo info; \ + struct ucontext uc; \ + } *frame; \ + \ + /* rt_sigreturn trampoline: \ + 3419000x ldi 0, %r25 or ldi 1, %r25 (x = 0 or 2) \ + 3414015a ldi __NR_rt_sigreturn, %r20 \ + e4008200 be,l 0x100(%sr2, %r0), %sr0, %r31 \ + 08000240 nop */ \ + \ + if (pc[0] == 0x34190000 || pc[0] == 0x34190002) \ + off = 4*4; \ + else if (pc[4] == 0x34190000 || pc[4] == 0x34190002) \ + { \ + pc += 4; \ + off = 10 * 4; \ + } \ + else if (pc[5] == 0x34190000 || pc[5] == 0x34190002) \ + { \ + pc += 5; \ + off = 10 * 4; \ + } \ + else \ + break; \ + if (pc[1] != 0x3414015a \ + || pc[2] != 0xe4008200 \ + || pc[3] != 0x08000240) \ + break; \ + \ + frame = (struct rt_sigframe *)(sp + off); \ + sc = &frame->uc.uc_mcontext; \ + \ + new_cfa = sc->sc_gr[30]; \ + (FS)->cfa_how = CFA_REG_OFFSET; \ + (FS)->cfa_reg = 30; \ + (FS)->cfa_offset = new_cfa - (long) (CONTEXT)->cfa; \ + for (i = 1; i <= 31; i++) \ + { \ + (FS)->regs.reg[i].how = REG_SAVED_OFFSET; \ + (FS)->regs.reg[i].loc.offset = (long)&sc->sc_gr[i] - new_cfa; \ + } \ + for (i = 4; i <= 31; i++) \ + { \ + /* FP regs have left and right halves */ \ + (FS)->regs.reg[2*i+24].how = REG_SAVED_OFFSET; \ + (FS)->regs.reg[2*i+24].loc.offset \ + = (long)&sc->sc_fr[i] - new_cfa; \ + (FS)->regs.reg[2*i+24+1].how = REG_SAVED_OFFSET; \ + (FS)->regs.reg[2*i+24+1].loc.offset \ + = (long)&sc->sc_fr[i] + 4 - new_cfa; \ + } \ + (FS)->regs.reg[88].how = REG_SAVED_OFFSET; \ + (FS)->regs.reg[88].loc.offset = (long) &sc->sc_sar - new_cfa; \ + (FS)->regs.reg[2].how = REG_SAVED_OFFSET; \ + (FS)->regs.reg[2].loc.offset = (long) &sc->sc_iaoq[0] - new_cfa; \ + (FS)->retaddr_column = 2; \ + goto SUCCESS; \ + } while (0) + +#endif /* IN_LIBGCC2 */ diff --git a/libjava/ChangeLog b/libjava/ChangeLog index aded40bd634..8c6cb64e6c6 100644 --- a/libjava/ChangeLog +++ b/libjava/ChangeLog @@ -1,3 +1,10 @@ +2004-07-08 Randolph Chung + + * configure.in (SIGNAL_HANDLER): Use pa-signal.h for hppa. + * configure: Regenerate. + * configure.host: Set can_unwind_signal for hppa*-linux. + * include/pa-signal.h: New file. + 2004-07-07 Per Bothner * Makefile.am: Add rules to build libgij from just gij.cc. diff --git a/libjava/configure b/libjava/configure index 463bd0b085a..bf829c1f267 100755 --- a/libjava/configure +++ b/libjava/configure @@ -8525,6 +8525,9 @@ case "${host}" in # SYSDEP_SOURCES=sysdep/ia64.c # test -d sysdep || mkdir sysdep # ;; + hppa*-*-linux*) + SIGNAL_HANDLER=include/pa-signal.h + ;; ia64-*-linux*) SIGNAL_HANDLER=include/dwarf2-signal.h ;; diff --git a/libjava/configure.host b/libjava/configure.host index 5971945b70f..947392766bf 100644 --- a/libjava/configure.host +++ b/libjava/configure.host @@ -169,6 +169,7 @@ case "${host}" in sparc*-linux* | \ ia64-* | \ x86_64*-linux* | \ + hppa*-linux* | \ sh-linux* | sh[34]*-linux*) can_unwind_signal=yes if test x$slow_pthread_self = xyes \ diff --git a/libjava/configure.in b/libjava/configure.in index 2eff8f95d6d..142cffa7902 100644 --- a/libjava/configure.in +++ b/libjava/configure.in @@ -1177,6 +1177,9 @@ case "${host}" in # SYSDEP_SOURCES=sysdep/ia64.c # test -d sysdep || mkdir sysdep # ;; + hppa*-*-linux*) + SIGNAL_HANDLER=include/pa-signal.h + ;; ia64-*-linux*) SIGNAL_HANDLER=include/dwarf2-signal.h ;; diff --git a/libjava/include/pa-signal.h b/libjava/include/pa-signal.h new file mode 100644 index 00000000000..0f7c05427ab --- /dev/null +++ b/libjava/include/pa-signal.h @@ -0,0 +1,61 @@ +// pa-signal.h - Catch runtime signals and turn them into exceptions. + +/* Copyright (C) 1998, 1999, 2000 Free Software Foundation + + This file is part of libgcj. + +This software is copyrighted work licensed under the terms of the +Libgcj License. Please consult the file "LIBGCJ_LICENSE" for +details. */ + +#ifndef JAVA_SIGNAL_H +#define JAVA_SIGNAL_H 1 + +#include +#include +#include + +#define HANDLE_SEGV 1 +#define HANDLE_FPE 1 + +#define SIGNAL_HANDLER(_name) \ +static void _Jv_##_name (int _dummy, siginfo_t *_info, void *arg) + +#define MAKE_THROW_FRAME(_exception) \ +do \ +{ \ + struct ucontext *uc = (struct ucontext *)arg; \ + struct sigcontext *sc = &uc->uc_mcontext; \ + (void)_dummy; \ + (void)_info; \ + /* Advance the program counter so that it is after the start \ + of the instruction: the exception handler expects \ + the PC to point to the instruction after a call. */ \ + sc->sc_iaoq[0] = sc->sc_iaoq[1]; \ + sc->sc_iaoq[1] += 4; \ +} \ +while (0) + +#define INIT_SEGV \ +do \ + { \ + struct sigaction act; \ + act.sa_sigaction = _Jv_catch_segv; \ + sigemptyset (&act.sa_mask); \ + act.sa_flags = SA_SIGINFO; \ + syscall (SYS_rt_sigaction, SIGSEGV, &act, NULL, _NSIG / 8); \ + } \ +while (0) + +#define INIT_FPE \ +do \ + { \ + struct sigaction act; \ + act.sa_sigaction = _Jv_catch_fpe; \ + sigemptyset (&act.sa_mask); \ + act.sa_flags = SA_SIGINFO; \ + syscall (SYS_rt_sigaction, SIGFPE, &act, NULL, _NSIG / 8); \ + } \ +while (0) + +#endif /* JAVA_SIGNAL_H */ -- 2.30.2