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gbeauche |
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/* |
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* sigregs.h - Extract machine registers from a signal frame |
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* |
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* SheepShaver (C) 1997-2005 Christian Bauer and Marc Hellwig |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#ifndef SIGREGS_H |
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#define SIGREGS_H |
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#ifndef EMULATED_PPC |
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// Common representation of machine registers |
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struct sigregs { |
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uint32 nip; |
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uint32 link; |
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uint32 ctr; |
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uint32 msr; |
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uint32 xer; |
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uint32 ccr; |
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uint32 gpr[32]; |
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}; |
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// Extract machine registers from Linux signal frame |
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#if defined(__linux__) |
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#include <sys/ucontext.h> |
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#define MACHINE_REGISTERS(scp) ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext.regs)) |
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struct machine_regs : public pt_regs |
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{ |
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u_long & cr() { return pt_regs::ccr; } |
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uint32 cr() const { return pt_regs::ccr; } |
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uint32 lr() const { return pt_regs::link; } |
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uint32 ctr() const { return pt_regs::ctr; } |
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uint32 xer() const { return pt_regs::xer; } |
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uint32 msr() const { return pt_regs::msr; } |
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uint32 dar() const { return pt_regs::dar; } |
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u_long & pc() { return pt_regs::nip; } |
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uint32 pc() const { return pt_regs::nip; } |
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u_long & gpr(int i) { return pt_regs::gpr[i]; } |
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uint32 gpr(int i) const { return pt_regs::gpr[i]; } |
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}; |
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#endif |
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// Extract machine registers from NetBSD signal frame |
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#if defined(__NetBSD__) |
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#include <sys/ucontext.h> |
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#define MACHINE_REGISTERS(scp) ((machine_regs *)&(((ucontext_t *)scp)->uc_mcontext)) |
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struct machine_regs : public mcontext_t |
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{ |
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long & cr() { return __gregs[_REG_CR]; } |
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uint32 cr() const { return __gregs[_REG_CR]; } |
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uint32 lr() const { return __gregs[_REG_LR]; } |
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uint32 ctr() const { return __gregs[_REG_CTR]; } |
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uint32 xer() const { return __gregs[_REG_XER]; } |
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uint32 msr() const { return __gregs[_REG_MSR]; } |
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uint32 dar() const { return (uint32)(((siginfo_t *)(((unsigned long)this) - offsetof(ucontext_t, uc_mcontext))) - 1)->si_addr; } /* HACK */ |
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long & pc() { return __gregs[_REG_PC]; } |
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uint32 pc() const { return __gregs[_REG_PC]; } |
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long & gpr(int i) { return __gregs[_REG_R0 + i]; } |
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uint32 gpr(int i) const { return __gregs[_REG_R0 + i]; } |
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}; |
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#endif |
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// Extract machine registers from Darwin signal frame |
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#if defined(__APPLE__) && defined(__MACH__) |
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#include <sys/signal.h> |
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extern "C" int sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss); |
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#include <sys/ucontext.h> |
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#define MACHINE_REGISTERS(scp) ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext)) |
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struct machine_regs : public mcontext |
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{ |
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uint32 & cr() { return ss.cr; } |
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uint32 cr() const { return ss.cr; } |
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uint32 lr() const { return ss.lr; } |
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uint32 ctr() const { return ss.ctr; } |
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uint32 xer() const { return ss.xer; } |
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uint32 msr() const { return ss.srr1; } |
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uint32 dar() const { return es.dar; } |
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uint32 & pc() { return ss.srr0; } |
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uint32 pc() const { return ss.srr0; } |
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uint32 & gpr(int i) { return (&ss.r0)[i]; } |
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uint32 gpr(int i) const { return (&ss.r0)[i]; } |
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}; |
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#endif |
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// Convert system-dependent machine registers to generic sigregs |
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static void build_sigregs(sigregs *srp, machine_regs *mrp) |
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{ |
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srp->nip = mrp->pc(); |
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srp->link = mrp->lr(); |
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srp->ctr = mrp->ctr(); |
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srp->msr = mrp->msr(); |
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srp->xer = mrp->xer(); |
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srp->ccr = mrp->cr(); |
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for (int i = 0; i < 32; i++) |
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srp->gpr[i] = mrp->gpr(i); |
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} |
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#endif |
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#endif /* SIGREGS_H */ |
