diff options
Diffstat (limited to 'gcc-4.2.1/gcc/config/alpha/vms-unwind.h')
-rw-r--r-- | gcc-4.2.1/gcc/config/alpha/vms-unwind.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/config/alpha/vms-unwind.h b/gcc-4.2.1/gcc/config/alpha/vms-unwind.h new file mode 100644 index 000000000..4fb6a198f --- /dev/null +++ b/gcc-4.2.1/gcc/config/alpha/vms-unwind.h @@ -0,0 +1,72 @@ +/* DWARF2 EH unwinding support for Alpha VMS. + Copyright (C) 2004 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 2, 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. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +#include <pdscdef.h> + +#define MD_FALLBACK_FRAME_STATE_FOR alpha_fallback_frame_state + +static _Unwind_Reason_Code +alpha_fallback_frame_state (struct _Unwind_Context *context, + _Unwind_FrameState *fs) +{ + PDSCDEF *pv = *((PDSCDEF **) context->reg [29]); + + if (pv && ((long) pv & 0x7) == 0) /* low bits 0 means address */ + pv = *(PDSCDEF **) pv; + + if (pv && ((pv->pdsc$w_flags & 0xf) == PDSC$K_KIND_FP_STACK)) + { + int i, j; + + fs->cfa_offset = pv->pdsc$l_size; + fs->cfa_reg = pv->pdsc$w_flags & PDSC$M_BASE_REG_IS_FP ? 29 : 30; + fs->retaddr_column = 26; + fs->cfa_how = CFA_REG_OFFSET; + fs->regs.reg[27].loc.offset = -pv->pdsc$l_size; + fs->regs.reg[27].how = REG_SAVED_OFFSET; + fs->regs.reg[26].loc.offset + = -(pv->pdsc$l_size - pv->pdsc$w_rsa_offset); + fs->regs.reg[26].how = REG_SAVED_OFFSET; + + for (i = 0, j = 0; i < 32; i++) + if (1<<i & pv->pdsc$l_ireg_mask) + { + fs->regs.reg[i].loc.offset + = -(pv->pdsc$l_size - pv->pdsc$w_rsa_offset - 8 * ++j); + fs->regs.reg[i].how = REG_SAVED_OFFSET; + } + + return _URC_NO_REASON; + } + else if (pv && ((pv->pdsc$w_flags & 0xf) == PDSC$K_KIND_FP_REGISTER)) + { + fs->cfa_offset = pv->pdsc$l_size; + fs->cfa_reg = pv->pdsc$w_flags & PDSC$M_BASE_REG_IS_FP ? 29 : 30; + fs->retaddr_column = 26; + fs->cfa_how = CFA_REG_OFFSET; + fs->regs.reg[26].loc.reg = pv->pdsc$b_save_ra; + fs->regs.reg[26].how = REG_SAVED_REG; + fs->regs.reg[29].loc.reg = pv->pdsc$b_save_fp; + fs->regs.reg[29].how = REG_SAVED_REG; + + return _URC_NO_REASON; + } + return _URC_END_OF_STACK; +} |