1/* Target-dependent code for Solaris x86. 2 Copyright 2002, 2003 Free Software Foundation, Inc. 3 4 This file is part of GDB. 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, 19 Boston, MA 02111-1307, USA. */ 20 21#include "defs.h" 22#include "value.h" 23#include "osabi.h" 24 25#include "i386-tdep.h" 26 27/* From <ia32/sys/reg.h>. */ 28static int i386_sol2_gregset_reg_offset[] = 29{ 30 11 * 4, /* %eax */ 31 10 * 4, /* %ecx */ 32 9 * 4, /* %edx */ 33 8 * 4, /* %ebx */ 34 17 * 4, /* %esp */ 35 6 * 4, /* %ebp */ 36 5 * 4, /* %esi */ 37 4 * 4, /* %edi */ 38 14 * 4, /* %eip */ 39 16 * 4, /* %eflags */ 40 15 * 4, /* %cs */ 41 18 * 4, /* %ss */ 42 3 * 4, /* %ds */ 43 2 * 4, /* %es */ 44 1 * 4, /* %fs */ 45 0 * 4 /* %gs */ 46}; 47 48static int 49i386_sol2_pc_in_sigtramp (CORE_ADDR pc, char *name) 50{ 51 /* Signal handler frames under Solaris 2 are recognized by a return 52 address of 0xffffffff. */ 53 return (pc == 0xffffffff); 54} 55 56/* Solaris doesn't have a `struct sigcontext', but it does have a 57 `mcontext_t' that contains the saved set of machine registers. */ 58 59static CORE_ADDR 60i386_sol2_mcontext_addr (struct frame_info *next_frame) 61{ 62 CORE_ADDR sp, ucontext_addr; 63 64 sp = frame_unwind_register_unsigned (next_frame, I386_ESP_REGNUM); 65 ucontext_addr = get_frame_memory_unsigned (next_frame, sp + 8, 4); 66 67 return ucontext_addr + 36; 68} 69 70/* Solaris 2. */ 71 72static void 73i386_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 74{ 75 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 76 77 /* Solaris is SVR4-based. */ 78 i386_svr4_init_abi (info, gdbarch); 79 80 /* Solaris reserves space for its FPU emulator in `fpregset_t'. 81 There is also some space reserved for the registers of a Weitek 82 math coprocessor. */ 83 tdep->gregset_reg_offset = i386_sol2_gregset_reg_offset; 84 tdep->gregset_num_regs = ARRAY_SIZE (i386_sol2_gregset_reg_offset); 85 tdep->sizeof_gregset = 19 * 4; 86 tdep->sizeof_fpregset = 380; 87 88 tdep->sigcontext_addr = i386_sol2_mcontext_addr; 89 tdep->sc_reg_offset = tdep->gregset_reg_offset; 90 tdep->sc_num_regs = tdep->gregset_num_regs; 91 92 /* Signal trampolines are slightly different from SVR4. */ 93 set_gdbarch_pc_in_sigtramp (gdbarch, i386_sol2_pc_in_sigtramp); 94} 95 96 97static enum gdb_osabi 98i386_sol2_osabi_sniffer (bfd *abfd) 99{ 100 /* If we have a section named .SUNW_version, then it is almost 101 certainly Solaris 2. */ 102 if (bfd_get_section_by_name (abfd, ".SUNW_version")) 103 return GDB_OSABI_SOLARIS; 104 105 return GDB_OSABI_UNKNOWN; 106} 107 108/* Provide a prototype to silence -Wmissing-prototypes. */ 109void _initialize_i386_sol2_tdep (void); 110 111void 112_initialize_i386_sol2_tdep (void) 113{ 114 /* Register an ELF OS ABI sniffer for Solaris 2 binaries. */ 115 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour, 116 i386_sol2_osabi_sniffer); 117 118 gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SOLARIS, 119 i386_sol2_init_abi); 120} 121