diff options
author | Roland McGrath <roland@redhat.com> | 2009-06-24 17:41:40 -0700 |
---|---|---|
committer | Roland McGrath <roland@redhat.com> | 2009-07-08 15:15:52 -0700 |
commit | 3c84db3b4b610bf636c4363abb6d3dac5ae020f9 (patch) | |
tree | e0af0c5a7f27a3f06a66353a3da9bec0bd7bd32f /backends/i386_cfi.c | |
parent | fe8b42e6131b74829fe31d15f31349cade566a59 (diff) | |
download | elfutils-3c84db3b4b610bf636c4363abb6d3dac5ae020f9.tar.gz |
CFI support: lookup by PC and translate into DWARF location per register
Diffstat (limited to 'backends/i386_cfi.c')
-rw-r--r-- | backends/i386_cfi.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/backends/i386_cfi.c b/backends/i386_cfi.c new file mode 100644 index 00000000..77478f7e --- /dev/null +++ b/backends/i386_cfi.c @@ -0,0 +1,65 @@ +/* i386 ABI-specified defaults for DWARF CFI. + Copyright (C) 2009 Red Hat, Inc. + This file is part of Red Hat elfutils. + + Red Hat elfutils 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; version 2 of the License. + + Red Hat elfutils 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 Red Hat elfutils; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. + + Red Hat elfutils is an included package of the Open Invention Network. + An included package of the Open Invention Network is a package for which + Open Invention Network licensees cross-license their patents. No patent + license is granted, either expressly or impliedly, by designation as an + included package. Should you wish to participate in the Open Invention + Network licensing program, please visit www.openinventionnetwork.com + <http://www.openinventionnetwork.com>. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <dwarf.h> + +#define BACKEND i386_ +#include "libebl_CPU.h" + +int +i386_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info) +{ + static const uint8_t abi_cfi[] = + { + /* Call-saved regs. */ + DW_CFA_same_value, ULEB128_7 (3), /* %ebx */ + DW_CFA_same_value, ULEB128_7 (5), /* %ebp */ + DW_CFA_same_value, ULEB128_7 (6), /* %esi */ + DW_CFA_same_value, ULEB128_7 (7), /* %edi */ + + /* The CFA is the SP. */ + DW_CFA_val_offset, ULEB128_7 (4), ULEB128_7 (0), + + /* Segment registers are call-saved if ever used at all. */ + DW_CFA_same_value, ULEB128_7 (40), /* %es */ + DW_CFA_same_value, ULEB128_7 (41), /* %cs */ + DW_CFA_same_value, ULEB128_7 (42), /* %ss */ + DW_CFA_same_value, ULEB128_7 (43), /* %ds */ + DW_CFA_same_value, ULEB128_7 (44), /* %fs */ + DW_CFA_same_value, ULEB128_7 (45), /* %gs */ + }; + + abi_info->initial_instructions = abi_cfi; + abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi]; + abi_info->data_alignment_factor = 4; + + abi_info->return_address_register = 8; /* %eip */ + + return 0; +} |