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bsd-user: pull in target_arch_thread.h update target_arch_elf.h 

Update target_arch_elf.h to remove thread_init. Move its contents to
target_arch_thread.h and rename to target_thread_init(). Update
elfload.c to call it. Create thread_os_thread.h to hold the os specific
parts of the thread and threat manipulation routines. Currently, it just
includes target_arch_thread.h. target_arch_thread.h contains the at the
moment unused target_thread_set_upcall which will be used in the future
when creating actual thread (i386 has this stubbed, but other
architectures in the bsd-user tree have real ones). FreeBSD doesn't do
AT_HWCAP, so remove that code. Linux does, and this code came from there.

These changes are all interrelated and could be brokend down, but seem
to represent a reviewable changeset since most of the change is boiler
plate.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
This commit is contained in:
Warner Losh 2021-08-03 22:04:20 -06:00 committed by Warner Losh
parent 031fe7af8a
commit a8fe6d5d62
8 changed files with 171 additions and 85 deletions
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4
bsd-user/elfload.c
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@ -24,6 +24,7 @@
#include "qemu/path.h"
#include "target_arch_elf.h"
#include "target_os_thread.h"
/* this flag is uneffective under linux too, should be deleted */
#ifndef MAP_DENYWRITE
@ -1001,5 +1002,6 @@ int load_elf_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs,
void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
{
init_thread(regs, infop);
target_thread_init(regs, infop);
}

25
bsd-user/freebsd/target_os_thread.h Normal file
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@ -0,0 +1,25 @@
/*
* FreeBSD thread dependent code and definitions
*
* Copyright (c) 2013 Stacey D. Son
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _TARGET_OS_THREAD_H_
#define _TARGET_OS_THREAD_H_
#include "target_arch_thread.h"
#endif /* !_TARGET_OS_THREAD_H_ */

52
bsd-user/i386/target_arch_elf.h
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@ -19,62 +19,16 @@
#ifndef _TARGET_ARCH_ELF_H_
#define _TARGET_ARCH_ELF_H_
#define ELF_PLATFORM get_elf_platform()
static const char *get_elf_platform(void)
{
static char elf_platform[] = "i386";
int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
if (family > 6) {
family = 6;
}
if (family >= 3) {
elf_platform[1] = '0' + family;
}
return elf_platform;
}
#define ELF_HWCAP get_elf_hwcap()
static uint32_t get_elf_hwcap(void)
{
X86CPU *cpu = X86_CPU(thread_cpu);
return cpu->env.features[FEAT_1_EDX];
}
#define ELF_START_MMAP 0x80000000
/*
* This is used to ensure we don't load something for the wrong architecture.
*/
#define ELF_ET_DYN_LOAD_ADDR 0x01001000
#define elf_check_arch(x) (((x) == EM_386) || ((x) == EM_486))
/*
* These are used to set parameters in the core dumps.
*/
#define ELF_HWCAP 0 /* FreeBSD doesn't do AT_HWCAP{,2} on x86 */
#define ELF_CLASS ELFCLASS32
#define ELF_DATA ELFDATA2LSB
#define ELF_ARCH EM_386
static inline void init_thread(struct target_pt_regs *regs,
struct image_info *infop)
{
regs->esp = infop->start_stack;
regs->eip = infop->entry;
/*
* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
* starts %edx contains a pointer to a function which might be
* registered using `atexit'. This provides a mean for the
* dynamic linker to call DT_FINI functions for shared libraries
* that have been loaded before the code runs.
*
* A value of 0 tells we have no such handler.
*/
regs->edx = 0;
}
#define USE_ELF_CORE_DUMP
#define ELF_EXEC_PAGESIZE 4096

47
bsd-user/i386/target_arch_thread.h Normal file
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@ -0,0 +1,47 @@
/*
* i386 thread support
*
* Copyright (c) 2013 Stacey D. Son
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _TARGET_ARCH_THREAD_H_
#define _TARGET_ARCH_THREAD_H_
/* Compare to vm_machdep.c cpu_set_upcall_kse() */
static inline void target_thread_set_upcall(CPUX86State *regs, abi_ulong entry,
abi_ulong arg, abi_ulong stack_base, abi_ulong stack_size)
{
/* XXX */
}
static inline void target_thread_init(struct target_pt_regs *regs,
struct image_info *infop)
{
regs->esp = infop->start_stack;
regs->eip = infop->entry;
/*
* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
* contains a pointer to a function which might be registered using
* `atexit'. This provides a mean for the dynamic linker to call DT_FINI
* functions for shared libraries that have been loaded before the code
* runs.
*
* A value of 0 tells we have no such handler.
*/
regs->edx = 0;
}
#endif /* !_TARGET_ARCH_THREAD_H_ */

25
bsd-user/netbsd/target_os_thread.h Normal file
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@ -0,0 +1,25 @@
/*
* NetBSD thread dependent code and definitions
*
* Copyright (c) 2013 Stacey D. Son
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _TARGET_OS_THREAD_H_
#define _TARGET_OS_THREAD_H_
#include "target_arch_thread.h"
#endif /* !_TARGET_OS_THREAD_H_ */

25
bsd-user/openbsd/target_os_thread.h Normal file
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@ -0,0 +1,25 @@
/*
* OpenBSD thread dependent code and definitions
*
* Copyright (c) 2013 Stacey D. Son
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _TARGET_OS_THREAD_H_
#define _TARGET_OS_THREAD_H_
#include "target_arch_thread.h"
#endif /* !_TARGET_OS_THREAD_H_ */

38
bsd-user/x86_64/target_arch_elf.h
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@ -19,48 +19,16 @@
#ifndef _TARGET_ARCH_ELF_H_
#define _TARGET_ARCH_ELF_H_
#define ELF_PLATFORM get_elf_platform()
static const char *get_elf_platform(void)
{
static char elf_platform[] = "i386";
int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
if (family > 6) {
family = 6;
}
if (family >= 3) {
elf_platform[1] = '0' + family;
}
return elf_platform;
}
#define ELF_HWCAP get_elf_hwcap()
static uint32_t get_elf_hwcap(void)
{
X86CPU *cpu = X86_CPU(thread_cpu);
return cpu->env.features[FEAT_1_EDX];
}
#define ELF_START_MMAP 0x2aaaaab000ULL
#define ELF_ET_DYN_LOAD_ADDR 0x01021000
#define elf_check_arch(x) (((x) == ELF_ARCH))
#define ELF_HWCAP 0 /* FreeBSD doesn't do AT_HWCAP{,2} on x86 */
#define ELF_CLASS ELFCLASS64
#define ELF_DATA ELFDATA2LSB
#define ELF_ARCH EM_X86_64
static inline void init_thread(struct target_pt_regs *regs,
struct image_info *infop)
{
regs->rax = 0;
regs->rsp = infop->start_stack;
regs->rip = infop->entry;
if (bsd_type == target_freebsd) {
regs->rdi = infop->start_stack;
}
}
#define USE_ELF_CORE_DUMP
#define ELF_EXEC_PAGESIZE 4096

40
bsd-user/x86_64/target_arch_thread.h Normal file
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@ -0,0 +1,40 @@
/*
* x86_64 thread support
*
* Copyright (c) 2013 Stacey D. Son
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _TARGET_ARCH_THREAD_H_
#define _TARGET_ARCH_THREAD_H_
/* Compare to vm_machdep.c cpu_set_upcall_kse() */
static inline void target_thread_set_upcall(CPUX86State *regs, abi_ulong entry,
abi_ulong arg, abi_ulong stack_base, abi_ulong stack_size)
{
/* XXX */
}
static inline void target_thread_init(struct target_pt_regs *regs,
struct image_info *infop)
{
regs->rax = 0;
regs->rsp = infop->start_stack;
regs->rip = infop->entry;
if (bsd_type == target_freebsd) {
regs->rdi = infop->start_stack;
}
}
#endif /* !_TARGET_ARCH_THREAD_H_ */