diff options
Diffstat (limited to 'gdb/nat')
| -rw-r--r-- | gdb/nat/x86-linux-tdesc.c | 124 | ||||
| -rw-r--r-- | gdb/nat/x86-linux-tdesc.h | 75 |
2 files changed, 0 insertions, 199 deletions
diff --git a/gdb/nat/x86-linux-tdesc.c b/gdb/nat/x86-linux-tdesc.c deleted file mode 100644 index be7014d..0000000 --- a/gdb/nat/x86-linux-tdesc.c +++ /dev/null @@ -1,124 +0,0 @@ -/* Target description related code for GNU/Linux x86 (i386 and x86-64). - - Copyright (C) 2024 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 3 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, see <http://www.gnu.org/licenses/>. */ - -#include "gdbsupport/common-defs.h" -#include "nat/x86-linux-tdesc.h" -#ifdef __x86_64__ -#include "arch/amd64.h" -#endif -#include "arch/i386.h" - -#include "gdbsupport/common-defs.h" -#include "nat/x86-linux.h" -#include "nat/x86-linux-dregs.h" -#include "nat/gdb_ptrace.h" -#include "nat/x86-xstate.h" -#include "nat/x86-linux-tdesc.h" - -#include <cstdint> -#include <cstdlib> -#include <linux/uio.h> -#include <elf.h> -#include <sys/user.h> -#include <sys/user.h> - -/* See nat/x86-linux-tdesc.h. */ - -const target_desc * -x86_linux_tdesc_for_tid (int tid, enum tribool *have_ptrace_getregset, - gdb::function_view<void (uint64_t)> xcr0_init_cb, - const char *error_msg, uint64_t *xcr0_storage) -{ -#ifdef __x86_64__ - - x86_linux_arch_size arch_size = x86_linux_ptrace_get_arch_size (tid); - bool is_64bit = arch_size.is_64bit (); - bool is_x32 = arch_size.is_x32 (); - - if (sizeof (void *) == 4 && is_64bit && !is_x32) - error ("%s", error_msg); - -#elif HAVE_PTRACE_GETFPXREGS - if (have_ptrace_getfpxregs == -1) - { - elf_fpxregset_t fpxregs; - - if (ptrace (PTRACE_GETFPXREGS, tid, 0, (int) &fpxregs) < 0) - { - have_ptrace_getfpxregs = 0; - *have_ptrace_getregset = TRIBOOL_FALSE; - return i386_linux_read_description (X86_XSTATE_X87_MASK); - } - } -#endif - - if (*have_ptrace_getregset == TRIBOOL_UNKNOWN) - { - uint64_t xstateregs[(X86_XSTATE_SSE_SIZE / sizeof (uint64_t))]; - struct iovec iov; - - iov.iov_base = xstateregs; - iov.iov_len = sizeof (xstateregs); - - /* Check if PTRACE_GETREGSET works. */ - if (ptrace (PTRACE_GETREGSET, tid, - (unsigned int) NT_X86_XSTATE, &iov) < 0) - { - *have_ptrace_getregset = TRIBOOL_FALSE; - *xcr0_storage = 0; - } - else - { - *have_ptrace_getregset = TRIBOOL_TRUE; - - /* Get XCR0 from XSAVE extended state. */ - *xcr0_storage = xstateregs[(I386_LINUX_XSAVE_XCR0_OFFSET - / sizeof (uint64_t))]; - -#ifdef __x86_64__ - /* No MPX on x32. */ - if (is_64bit && is_x32) - *xcr0_storage &= ~X86_XSTATE_MPX; -#endif /* __x86_64__ */ - - xcr0_init_cb (*xcr0_storage); - } - } - - /* Check the native XCR0 only if PTRACE_GETREGSET is available. If - PTRACE_GETREGSET is not available then set xcr0_features_bits to - zero so that the "no-features" descriptions are returned by the - switches below. */ - uint64_t xcr0_features_bits; - if (*have_ptrace_getregset == TRIBOOL_TRUE) - xcr0_features_bits = *xcr0_storage & X86_XSTATE_ALL_MASK; - else - xcr0_features_bits = 0; - -#ifdef __x86_64__ - if (is_64bit) - { - return amd64_linux_read_description (xcr0_features_bits, is_x32); - } - else -#endif - return i386_linux_read_description (xcr0_features_bits); - - gdb_assert_not_reached ("failed to return tdesc"); -} diff --git a/gdb/nat/x86-linux-tdesc.h b/gdb/nat/x86-linux-tdesc.h deleted file mode 100644 index 3727a8b..0000000 --- a/gdb/nat/x86-linux-tdesc.h +++ /dev/null @@ -1,75 +0,0 @@ -/* Target description related code for GNU/Linux x86 (i386 and x86-64). - - Copyright (C) 2024 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 3 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, see <http://www.gnu.org/licenses/>. */ - -#ifndef NAT_X86_LINUX_TDESC_H -#define NAT_X86_LINUX_TDESC_H - -#include "gdbsupport/function-view.h" - -struct target_desc; - -/* Return the target description for Linux thread TID. - - When *HAVE_PTRACE_GETREGSET is TRIBOOL_UNKNOWN then the current value of - xcr0 is read using ptrace calls and stored into *XCR0_STORAGE. Then - XCR0_INIT_CB is called with the value of *XCR0_STORAGE and - *HAVE_PTRACE_GETREGSET is set to TRIBOOL_TRUE. - - If the attempt to read xcr0 using ptrace fails then *XCR0_STORAGE is set - to zero and *HAVE_PTRACE_GETREGSET is set to TRIBOOL_FALSE. - - The storage pointed to by XCR0_STORAGE must exist until the program - terminates, this storage is used to cache the xcr0 value. As such - XCR0_INIT_CB will only be called once if xcr0 is successfully read using - ptrace, or not at all if the ptrace call fails. - - This function returns a target description based on the extracted xcr0 - value along with other characteristics of the thread identified by TID. - - This function can return nullptr if we encounter a machine configuration - for which a target_desc cannot be created. Ideally this would not be - the case, we should be able to create a target description for every - possible machine configuration. See amd64_linux_read_description and - i386_linux_read_description for cases when nullptr might be - returned. - - ERROR_MSG is using in an error() call if we try to create a target - description for a 64-bit process but this is a 32-bit build of GDB. */ - -extern const target_desc * -x86_linux_tdesc_for_tid (int tid, enum tribool *have_ptrace_getregset, - gdb::function_view<void (uint64_t)> xcr0_init_cb, - const char *error_msg, uint64_t *xcr0_storage); - -#ifdef __x86_64__ - -/* Return the right amd64-linux target descriptions according to - XCR0_FEATURES_BIT and IS_X32. This is implemented separately in both - GDB and gdbserver. */ - -extern const target_desc *amd64_linux_read_description - (uint64_t xcr0_features_bit, bool is_x32); - -#endif - -/* Return the target description according to XCR0. This is implemented - separately in both GDB and gdbserver. */ -extern const struct target_desc *i386_linux_read_description (uint64_t xcr0); - -#endif /* NAT_X86_LINUX_TDESC_H */ |