diff options
Diffstat (limited to 'gcc-4.8.1/libgcc/config/rs6000/linux-unwind.h')
| -rw-r--r-- | gcc-4.8.1/libgcc/config/rs6000/linux-unwind.h | 323 |
1 files changed, 0 insertions, 323 deletions
diff --git a/gcc-4.8.1/libgcc/config/rs6000/linux-unwind.h b/gcc-4.8.1/libgcc/config/rs6000/linux-unwind.h deleted file mode 100644 index c9273c404..000000000 --- a/gcc-4.8.1/libgcc/config/rs6000/linux-unwind.h +++ /dev/null @@ -1,323 +0,0 @@ -/* DWARF2 EH unwinding support for PowerPC and PowerPC64 Linux. - Copyright (C) 2004-2013 Free Software Foundation, Inc. - - This file is part of GCC. - - GCC is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published - by the Free Software Foundation; either version 3, or (at your - option) any later version. - - GCC is distributed in the hope that it will be useful, but WITHOUT - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public - License for more details. - - Under Section 7 of GPL version 3, you are granted additional - permissions described in the GCC Runtime Library Exception, version - 3.1, as published by the Free Software Foundation. - - You should have received a copy of the GNU General Public License and - a copy of the GCC Runtime Library Exception along with this program; - see the files COPYING3 and COPYING.RUNTIME respectively. If not, see - <http://www.gnu.org/licenses/>. */ - -#define R_LR 65 -#define R_CR2 70 -#define R_VR0 77 -#define R_VRSAVE 109 - -struct gcc_vregs -{ - __attribute__ ((vector_size (16))) int vr[32]; -#ifdef __powerpc64__ - unsigned int pad1[3]; - unsigned int vscr; - unsigned int vsave; - unsigned int pad2[3]; -#else - unsigned int vsave; - unsigned int pad[2]; - unsigned int vscr; -#endif -}; - -struct gcc_regs -{ - unsigned long gpr[32]; - unsigned long nip; - unsigned long msr; - unsigned long orig_gpr3; - unsigned long ctr; - unsigned long link; - unsigned long xer; - unsigned long ccr; - unsigned long softe; - unsigned long trap; - unsigned long dar; - unsigned long dsisr; - unsigned long result; - unsigned long pad1[4]; - double fpr[32]; - unsigned int pad2; - unsigned int fpscr; -#ifdef __powerpc64__ - struct gcc_vregs *vp; -#else - unsigned int pad3[2]; -#endif - struct gcc_vregs vregs; -}; - -struct gcc_ucontext -{ -#ifdef __powerpc64__ - unsigned long pad[28]; -#else - unsigned long pad[12]; -#endif - struct gcc_regs *regs; - struct gcc_regs rsave; -}; - -#ifdef __powerpc64__ - -enum { SIGNAL_FRAMESIZE = 128 }; - -/* If PC is at a sigreturn trampoline, return a pointer to the - regs. Otherwise return NULL. */ - -static struct gcc_regs * -get_regs (struct _Unwind_Context *context) -{ - const unsigned int *pc = context->ra; - - /* addi r1, r1, 128; li r0, 0x0077; sc (sigreturn) */ - /* addi r1, r1, 128; li r0, 0x00AC; sc (rt_sigreturn) */ - if (pc[0] != 0x38210000 + SIGNAL_FRAMESIZE || pc[2] != 0x44000002) - return NULL; - if (pc[1] == 0x38000077) - { - struct sigframe { - char gap[SIGNAL_FRAMESIZE]; - unsigned long pad[7]; - struct gcc_regs *regs; - } *frame = (struct sigframe *) context->cfa; - return frame->regs; - } - else if (pc[1] == 0x380000AC) - { - /* This works for 2.4 kernels, but not for 2.6 kernels with vdso - because pc isn't pointing into the stack. Can be removed when - no one is running 2.4.19 or 2.4.20, the first two ppc64 - kernels released. */ - const struct rt_sigframe_24 { - int tramp[6]; - void *pinfo; - struct gcc_ucontext *puc; - } *frame24 = (const struct rt_sigframe_24 *) context->ra; - - /* Test for magic value in *puc of vdso. */ - if ((long) frame24->puc != -21 * 8) - return frame24->puc->regs; - else - { - /* This works for 2.4.21 and later kernels. */ - struct rt_sigframe { - char gap[SIGNAL_FRAMESIZE]; - struct gcc_ucontext uc; - unsigned long pad[2]; - int tramp[6]; - void *pinfo; - struct gcc_ucontext *puc; - } *frame = (struct rt_sigframe *) context->cfa; - return frame->uc.regs; - } - } - return NULL; -} - -#else /* !__powerpc64__ */ - -enum { SIGNAL_FRAMESIZE = 64 }; - -static struct gcc_regs * -get_regs (struct _Unwind_Context *context) -{ - const unsigned int *pc = context->ra; - - /* li r0, 0x7777; sc (sigreturn old) */ - /* li r0, 0x0077; sc (sigreturn new) */ - /* li r0, 0x6666; sc (rt_sigreturn old) */ - /* li r0, 0x00AC; sc (rt_sigreturn new) */ - if (pc[1] != 0x44000002) - return NULL; - if (pc[0] == 0x38007777 || pc[0] == 0x38000077) - { - struct sigframe { - char gap[SIGNAL_FRAMESIZE]; - unsigned long pad[7]; - struct gcc_regs *regs; - } *frame = (struct sigframe *) context->cfa; - return frame->regs; - } - else if (pc[0] == 0x38006666 || pc[0] == 0x380000AC) - { - struct rt_sigframe { - char gap[SIGNAL_FRAMESIZE + 16]; - char siginfo[128]; - struct gcc_ucontext uc; - } *frame = (struct rt_sigframe *) context->cfa; - return frame->uc.regs; - } - return NULL; -} -#endif - -/* Do code reading to identify a signal frame, and set the frame - state data appropriately. See unwind-dw2.c for the structs. */ - -#define MD_FALLBACK_FRAME_STATE_FOR ppc_fallback_frame_state - -static _Unwind_Reason_Code -ppc_fallback_frame_state (struct _Unwind_Context *context, - _Unwind_FrameState *fs) -{ - struct gcc_regs *regs = get_regs (context); - struct gcc_vregs *vregs; - long new_cfa; - int i; - - if (regs == NULL) - return _URC_END_OF_STACK; - - new_cfa = regs->gpr[STACK_POINTER_REGNUM]; - fs->regs.cfa_how = CFA_REG_OFFSET; - fs->regs.cfa_reg = STACK_POINTER_REGNUM; - fs->regs.cfa_offset = new_cfa - (long) context->cfa; - -#ifdef __powerpc64__ - fs->regs.reg[2].how = REG_SAVED_OFFSET; - fs->regs.reg[2].loc.offset = (long) ®s->gpr[2] - new_cfa; -#endif - for (i = 14; i < 32; i++) - { - fs->regs.reg[i].how = REG_SAVED_OFFSET; - fs->regs.reg[i].loc.offset = (long) ®s->gpr[i] - new_cfa; - } - - fs->regs.reg[R_CR2].how = REG_SAVED_OFFSET; - /* CR? regs are always 32-bit and PPC is big-endian, so in 64-bit - libgcc loc.offset needs to point to the low 32 bits of regs->ccr. */ - fs->regs.reg[R_CR2].loc.offset = (long) ®s->ccr - new_cfa - + sizeof (long) - 4; - - fs->regs.reg[R_LR].how = REG_SAVED_OFFSET; - fs->regs.reg[R_LR].loc.offset = (long) ®s->link - new_cfa; - - fs->regs.reg[ARG_POINTER_REGNUM].how = REG_SAVED_OFFSET; - fs->regs.reg[ARG_POINTER_REGNUM].loc.offset = (long) ®s->nip - new_cfa; - fs->retaddr_column = ARG_POINTER_REGNUM; - fs->signal_frame = 1; - - /* If we have a FPU... */ - for (i = 14; i < 32; i++) - { - fs->regs.reg[i + 32].how = REG_SAVED_OFFSET; - fs->regs.reg[i + 32].loc.offset = (long) ®s->fpr[i] - new_cfa; - } - - /* If we have a VMX unit... */ -#ifdef __powerpc64__ - vregs = regs->vp; -#else - vregs = ®s->vregs; -#endif - if (regs->msr & (1 << 25)) - { - for (i = 20; i < 32; i++) - { - fs->regs.reg[i + R_VR0].how = REG_SAVED_OFFSET; - fs->regs.reg[i + R_VR0].loc.offset = (long) &vregs->vr[i] - new_cfa; - } - } - - fs->regs.reg[R_VRSAVE].how = REG_SAVED_OFFSET; - fs->regs.reg[R_VRSAVE].loc.offset = (long) &vregs->vsave - new_cfa; - - /* If we have SPE register high-parts... we check at compile-time to - avoid expanding the code for all other PowerPC. */ -#ifdef __SPE__ - for (i = 14; i < 32; i++) - { - fs->regs.reg[i + FIRST_PSEUDO_REGISTER - 1].how = REG_SAVED_OFFSET; - fs->regs.reg[i + FIRST_PSEUDO_REGISTER - 1].loc.offset - = (long) ®s->vregs - new_cfa + 4 * i; - } -#endif - - return _URC_NO_REASON; -} - -#define MD_FROB_UPDATE_CONTEXT frob_update_context - -static void -frob_update_context (struct _Unwind_Context *context, _Unwind_FrameState *fs ATTRIBUTE_UNUSED) -{ - const unsigned int *pc = (const unsigned int *) context->ra; - - /* Fix up for 2.6.12 - 2.6.16 Linux kernels that have vDSO, but don't - have S flag in it. */ -#ifdef __powerpc64__ - /* addi r1, r1, 128; li r0, 0x0077; sc (sigreturn) */ - /* addi r1, r1, 128; li r0, 0x00AC; sc (rt_sigreturn) */ - if (pc[0] == 0x38210000 + SIGNAL_FRAMESIZE - && (pc[1] == 0x38000077 || pc[1] == 0x380000AC) - && pc[2] == 0x44000002) - _Unwind_SetSignalFrame (context, 1); -#else - /* li r0, 0x7777; sc (sigreturn old) */ - /* li r0, 0x0077; sc (sigreturn new) */ - /* li r0, 0x6666; sc (rt_sigreturn old) */ - /* li r0, 0x00AC; sc (rt_sigreturn new) */ - if ((pc[0] == 0x38007777 || pc[0] == 0x38000077 - || pc[0] == 0x38006666 || pc[0] == 0x380000AC) - && pc[1] == 0x44000002) - _Unwind_SetSignalFrame (context, 1); -#endif - -#ifdef __powerpc64__ - if (fs->regs.reg[2].how == REG_UNSAVED) - { - /* If the current unwind info (FS) does not contain explicit info - saving R2, then we have to do a minor amount of code reading to - figure out if it was saved. The big problem here is that the - code that does the save/restore is generated by the linker, so - we have no good way to determine at compile time what to do. */ - if (pc[0] == 0xF8410028 - || ((pc[0] & 0xFFFF0000) == 0x3D820000 - && pc[1] == 0xF8410028)) - { - /* We are in a plt call stub or r2 adjusting long branch stub, - before r2 has been saved. Keep REG_UNSAVED. */ - } - else - { - unsigned int *insn - = (unsigned int *) _Unwind_GetGR (context, R_LR); - if (insn && *insn == 0xE8410028) - _Unwind_SetGRPtr (context, 2, context->cfa + 40); - else if (pc[0] == 0x4E800421 - && pc[1] == 0xE8410028) - { - /* We are at the bctrl instruction in a call via function - pointer. gcc always emits the load of the new R2 just - before the bctrl so this is the first and only place - we need to use the stored R2. */ - _Unwind_Word sp = _Unwind_GetGR (context, 1); - _Unwind_SetGRPtr (context, 2, (void *)(sp + 40)); - } - } - } -#endif -} |