1 /* Target-dependent code for Solaris x86. 2 3 Copyright (C) 2002-2020 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 #include "defs.h" 21 #include "value.h" 22 #include "osabi.h" 23 24 #include "sol2-tdep.h" 25 #include "i386-tdep.h" 26 #include "solib-svr4.h" 27 28 /* From <ia32/sys/reg.h>. */ 29 static int i386_sol2_gregset_reg_offset[] = 30 { 31 11 * 4, /* %eax */ 32 10 * 4, /* %ecx */ 33 9 * 4, /* %edx */ 34 8 * 4, /* %ebx */ 35 17 * 4, /* %esp */ 36 6 * 4, /* %ebp */ 37 5 * 4, /* %esi */ 38 4 * 4, /* %edi */ 39 14 * 4, /* %eip */ 40 16 * 4, /* %eflags */ 41 15 * 4, /* %cs */ 42 18 * 4, /* %ss */ 43 3 * 4, /* %ds */ 44 2 * 4, /* %es */ 45 1 * 4, /* %fs */ 46 0 * 4 /* %gs */ 47 }; 48 49 /* Solaris doesn't have a `struct sigcontext', but it does have a 50 `mcontext_t' that contains the saved set of machine registers. */ 51 52 static CORE_ADDR 53 i386_sol2_mcontext_addr (struct frame_info *this_frame) 54 { 55 CORE_ADDR sp, ucontext_addr; 56 57 sp = get_frame_register_unsigned (this_frame, I386_ESP_REGNUM); 58 ucontext_addr = get_frame_memory_unsigned (this_frame, sp + 8, 4); 59 60 return ucontext_addr + 36; 61 } 62 63 /* Solaris 2. */ 64 65 static void 66 i386_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 67 { 68 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 69 70 /* Solaris is SVR4-based. */ 71 i386_svr4_init_abi (info, gdbarch); 72 73 sol2_init_abi (info, gdbarch); 74 75 /* Solaris reserves space for its FPU emulator in `fpregset_t'. 76 There is also some space reserved for the registers of a Weitek 77 math coprocessor. */ 78 tdep->gregset_reg_offset = i386_sol2_gregset_reg_offset; 79 tdep->gregset_num_regs = ARRAY_SIZE (i386_sol2_gregset_reg_offset); 80 tdep->sizeof_gregset = 19 * 4; 81 tdep->sizeof_fpregset = 380; 82 83 /* Signal trampolines are slightly different from SVR4. */ 84 tdep->sigtramp_p = sol2_sigtramp_p; 85 tdep->sigcontext_addr = i386_sol2_mcontext_addr; 86 tdep->sc_reg_offset = tdep->gregset_reg_offset; 87 tdep->sc_num_regs = tdep->gregset_num_regs; 88 89 /* Solaris has SVR4-style shared libraries. */ 90 set_solib_svr4_fetch_link_map_offsets 91 (gdbarch, svr4_ilp32_fetch_link_map_offsets); 92 } 93 94 95 static enum gdb_osabi 96 i386_sol2_osabi_sniffer (bfd *abfd) 97 { 98 /* If we have a section named .SUNW_version, then it is almost 99 certainly Solaris 2. */ 100 if (bfd_get_section_by_name (abfd, ".SUNW_version")) 101 return GDB_OSABI_SOLARIS; 102 103 return GDB_OSABI_UNKNOWN; 104 } 105 106 void _initialize_i386_sol2_tdep (); 107 void 108 _initialize_i386_sol2_tdep () 109 { 110 /* Register an ELF OS ABI sniffer for Solaris 2 binaries. */ 111 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour, 112 i386_sol2_osabi_sniffer); 113 114 gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SOLARIS, 115 i386_sol2_init_abi); 116 } 117