From 6a565344557d0acb4bd34cc9a0bf698662f9006b Mon Sep 17 00:00:00 2001 From: Mark Kettenis Date: Fri, 21 May 2004 19:18:40 +0000 Subject: GDB 6.1 (excluding .info files) --- gnu/usr.bin/binutils/gdb/amd64-nat.c | 163 +++++++++++++++++++++++++++++++++++ 1 file changed, 163 insertions(+) create mode 100644 gnu/usr.bin/binutils/gdb/amd64-nat.c (limited to 'gnu/usr.bin/binutils/gdb/amd64-nat.c') diff --git a/gnu/usr.bin/binutils/gdb/amd64-nat.c b/gnu/usr.bin/binutils/gdb/amd64-nat.c new file mode 100644 index 00000000000..31b360377be --- /dev/null +++ b/gnu/usr.bin/binutils/gdb/amd64-nat.c @@ -0,0 +1,163 @@ +/* Native-dependent code for AMD64. + + Copyright 2003, 2004 Free Software Foundation, Inc. + + This file is part of GDB. + + This program 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 of the License, or + (at your option) any later version. + + This program 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 this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "gdbarch.h" +#include "regcache.h" + +#include "gdb_assert.h" +#include "gdb_string.h" + +#include "i386-tdep.h" +#include "amd64-tdep.h" + +/* The following bits of code help with implementing debugging 32-bit + code natively on AMD64. The idea is to define two mappings between + the register number as used by GDB and the register set used by the + host to represent the general-purpose registers; one for 32-bit + code and one for 64-bit code. The mappings are specified by the + follwing variables and consist of an array of offsets within the + register set indexed by register number, and the number of + registers supported by the mapping. We don't need mappings for the + floating-point and SSE registers, since the difference between + 64-bit and 32-bit variants are negligable. The difference in the + number of SSE registers is already handled by the target code. */ + +/* General-purpose register mapping for native 32-bit code. */ +int *amd64_native_gregset32_reg_offset; +int amd64_native_gregset32_num_regs = I386_NUM_GREGS; + +/* General-purpose register mapping for native 64-bit code. */ +int *amd64_native_gregset64_reg_offset; +int amd64_native_gregset64_num_regs = AMD64_NUM_GREGS; + +/* Return the offset of REGNUM within the appropriate native + general-purpose register set. */ + +static int +amd64_native_gregset_reg_offset (int regnum) +{ + int *reg_offset = amd64_native_gregset64_reg_offset; + int num_regs = amd64_native_gregset64_num_regs; + + gdb_assert (regnum >= 0); + + if (gdbarch_ptr_bit (current_gdbarch) == 32) + { + reg_offset = amd64_native_gregset32_reg_offset; + num_regs = amd64_native_gregset32_num_regs; + } + + if (num_regs > NUM_REGS) + num_regs = NUM_REGS; + + if (regnum < num_regs && regnum < NUM_REGS) + return reg_offset[regnum]; + + return -1; +} + +/* Return whether the native general-purpose register set supplies + register REGNUM. */ + +int +amd64_native_gregset_supplies_p (int regnum) +{ + return (amd64_native_gregset_reg_offset (regnum) != -1); +} + + +/* Supply register REGNUM, whose contents are store in BUF, to + REGCACHE. If REGNUM is -1, supply all appropriate registers. */ + +void +amd64_supply_native_gregset (struct regcache *regcache, + const void *gregs, int regnum) +{ + const char *regs = gregs; + struct gdbarch *gdbarch = get_regcache_arch (regcache); + int num_regs = amd64_native_gregset64_num_regs; + int i; + + if (gdbarch_ptr_bit (gdbarch) == 32) + num_regs = amd64_native_gregset32_num_regs; + + if (num_regs > NUM_REGS) + num_regs = NUM_REGS; + + for (i = 0; i < num_regs; i++) + { + if (regnum == -1 || regnum == i) + { + int offset = amd64_native_gregset_reg_offset (i); + + if (offset != -1) + regcache_raw_supply (regcache, i, regs + offset); + } + } +} + +/* Collect register REGNUM from REGCACHE and store its contents in + GREGS. If REGNUM is -1, collect and store all appropriate + registers. */ + +void +amd64_collect_native_gregset (const struct regcache *regcache, + void *gregs, int regnum) +{ + char *regs = gregs; + struct gdbarch *gdbarch = get_regcache_arch (regcache); + int num_regs = amd64_native_gregset64_num_regs; + int i; + + if (gdbarch_ptr_bit (gdbarch) == 32) + { + num_regs = amd64_native_gregset32_num_regs; + + /* Make sure %eax, %ebx, %ecx, %edx, %esi, %edi, %ebp, %esp and + %eip get zero-extended to 64 bits. */ + for (i = 0; i <= I386_EIP_REGNUM; i++) + { + if (regnum == -1 || regnum == i) + memset (regs + amd64_native_gregset_reg_offset (i), 0, 8); + } + /* Ditto for %cs, %ss, %ds, %es, %fs, and %gs. */ + for (i = I386_CS_REGNUM; i <= I386_GS_REGNUM; i++) + { + if (regnum == -1 || regnum == i) + memset (regs + amd64_native_gregset_reg_offset (i), 0, 8); + } + } + + if (num_regs > NUM_REGS) + num_regs = NUM_REGS; + + for (i = 0; i < num_regs; i++) + { + if (regnum == -1 || regnum == i) + { + int offset = amd64_native_gregset_reg_offset (i); + + if (offset != -1) + regcache_raw_collect (regcache, i, regs + offset); + } + } +} -- cgit v1.2.3