| 1 |
/* |
| 2 |
* sigregs.h - Extract machine registers from a signal frame |
| 3 |
* |
| 4 |
* SheepShaver (C) 1997-2008 Christian Bauer and Marc Hellwig |
| 5 |
* |
| 6 |
* This program is free software; you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU General Public License as published by |
| 8 |
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 |
*/ |
| 20 |
|
| 21 |
#ifndef SIGREGS_H |
| 22 |
#define SIGREGS_H |
| 23 |
|
| 24 |
#ifndef EMULATED_PPC |
| 25 |
|
| 26 |
// Common representation of machine registers |
| 27 |
struct sigregs { |
| 28 |
uint32 nip; |
| 29 |
uint32 link; |
| 30 |
uint32 ctr; |
| 31 |
uint32 msr; |
| 32 |
uint32 xer; |
| 33 |
uint32 ccr; |
| 34 |
uint32 gpr[32]; |
| 35 |
}; |
| 36 |
|
| 37 |
// Extract machine registers from Linux signal frame |
| 38 |
#if defined(__linux__) |
| 39 |
#include <sys/ucontext.h> |
| 40 |
#define MACHINE_REGISTERS(scp) ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext.regs)) |
| 41 |
|
| 42 |
struct machine_regs : public pt_regs |
| 43 |
{ |
| 44 |
u_long & cr() { return pt_regs::ccr; } |
| 45 |
uint32 cr() const { return pt_regs::ccr; } |
| 46 |
uint32 lr() const { return pt_regs::link; } |
| 47 |
uint32 ctr() const { return pt_regs::ctr; } |
| 48 |
uint32 xer() const { return pt_regs::xer; } |
| 49 |
uint32 msr() const { return pt_regs::msr; } |
| 50 |
uint32 dar() const { return pt_regs::dar; } |
| 51 |
u_long & pc() { return pt_regs::nip; } |
| 52 |
uint32 pc() const { return pt_regs::nip; } |
| 53 |
u_long & gpr(int i) { return pt_regs::gpr[i]; } |
| 54 |
uint32 gpr(int i) const { return pt_regs::gpr[i]; } |
| 55 |
}; |
| 56 |
#endif |
| 57 |
|
| 58 |
// Extract machine registers from NetBSD signal frame |
| 59 |
#if defined(__NetBSD__) |
| 60 |
#include <sys/ucontext.h> |
| 61 |
#define MACHINE_REGISTERS(scp) ((machine_regs *)&(((ucontext_t *)scp)->uc_mcontext)) |
| 62 |
|
| 63 |
struct machine_regs : public mcontext_t |
| 64 |
{ |
| 65 |
long & cr() { return __gregs[_REG_CR]; } |
| 66 |
uint32 cr() const { return __gregs[_REG_CR]; } |
| 67 |
uint32 lr() const { return __gregs[_REG_LR]; } |
| 68 |
uint32 ctr() const { return __gregs[_REG_CTR]; } |
| 69 |
uint32 xer() const { return __gregs[_REG_XER]; } |
| 70 |
uint32 msr() const { return __gregs[_REG_MSR]; } |
| 71 |
uint32 dar() const { return (uint32)(((siginfo_t *)(((unsigned long)this) - offsetof(ucontext_t, uc_mcontext))) - 1)->si_addr; } /* HACK */ |
| 72 |
long & pc() { return __gregs[_REG_PC]; } |
| 73 |
uint32 pc() const { return __gregs[_REG_PC]; } |
| 74 |
long & gpr(int i) { return __gregs[_REG_R0 + i]; } |
| 75 |
uint32 gpr(int i) const { return __gregs[_REG_R0 + i]; } |
| 76 |
}; |
| 77 |
#endif |
| 78 |
|
| 79 |
// Extract machine registers from Darwin signal frame |
| 80 |
#if defined(__APPLE__) && defined(__MACH__) |
| 81 |
#include <sys/signal.h> |
| 82 |
|
| 83 |
#define MACHINE_REGISTERS(scp) ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext)) |
| 84 |
|
| 85 |
#if __DARWIN_UNIX03 |
| 86 |
#define __(x) __CONCAT(__,x) |
| 87 |
#else |
| 88 |
#define __(x) x |
| 89 |
#endif |
| 90 |
|
| 91 |
#include <sys/ucontext.h> |
| 92 |
|
| 93 |
#if __DARWIN_UNIX03 |
| 94 |
struct machine_regs : public __darwin_mcontext |
| 95 |
#else |
| 96 |
struct machine_regs : public mcontext |
| 97 |
#endif |
| 98 |
{ |
| 99 |
uint32 & cr() { return __(ss).__(cr); } |
| 100 |
uint32 cr() const { return __(ss).__(cr); } |
| 101 |
uint32 lr() const { return __(ss).__(lr); } |
| 102 |
uint32 ctr() const { return __(ss).__(ctr); } |
| 103 |
uint32 xer() const { return __(ss).__(xer); } |
| 104 |
uint32 msr() const { return __(ss).__(srr1); } |
| 105 |
uint32 dar() const { return __(es).__(dar); } |
| 106 |
uint32 & pc() { return __(ss).__(srr0); } |
| 107 |
uint32 pc() const { return __(ss).__(srr0); } |
| 108 |
uint32 & gpr(int i) { return (&__(ss).__(r0))[i]; } |
| 109 |
uint32 gpr(int i) const { return (&__(ss).__(r0))[i]; } |
| 110 |
}; |
| 111 |
#endif |
| 112 |
|
| 113 |
// Convert system-dependent machine registers to generic sigregs |
| 114 |
static void build_sigregs(sigregs *srp, machine_regs *mrp) |
| 115 |
{ |
| 116 |
srp->nip = mrp->pc(); |
| 117 |
srp->link = mrp->lr(); |
| 118 |
srp->ctr = mrp->ctr(); |
| 119 |
srp->msr = mrp->msr(); |
| 120 |
srp->xer = mrp->xer(); |
| 121 |
srp->ccr = mrp->cr(); |
| 122 |
for (int i = 0; i < 32; i++) |
| 123 |
srp->gpr[i] = mrp->gpr(i); |
| 124 |
} |
| 125 |
|
| 126 |
#endif |
| 127 |
|
| 128 |
#endif /* SIGREGS_H */ |
