diff options
Diffstat (limited to 'kernel/arch/i386')
| -rw-r--r-- | kernel/arch/i386/contextspfunc.S | 56 | ||||
| -rw-r--r-- | kernel/arch/i386/execregs.c | 132 | ||||
| -rw-r--r-- | kernel/arch/i386/execregs.h | 69 | ||||
| -rw-r--r-- | kernel/arch/i386/execsp.S | 112 | ||||
| -rw-r--r-- | kernel/arch/i386/h_execregs.S | 85 | ||||
| -rw-r--r-- | kernel/arch/i386/signalsphandler.S | 56 | ||||
| -rw-r--r-- | kernel/arch/i386/stack_pointer.h | 35 | ||||
| -rw-r--r-- | kernel/arch/i386/threadspfunc.S | 43 |
8 files changed, 588 insertions, 0 deletions
diff --git a/kernel/arch/i386/contextspfunc.S b/kernel/arch/i386/contextspfunc.S new file mode 100644 index 000000000000..cc097cc61325 --- /dev/null +++ b/kernel/arch/i386/contextspfunc.S @@ -0,0 +1,56 @@ +/* $NetBSD: contextspfunc.S,v 1.1 2025/04/21 02:33:44 riastradh Exp $ */ + +/*- + * Copyright (c) 2025 The NetBSD Foundation, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#define _LOCORE + +#include <machine/asm.h> + +RCSID("$NetBSD: contextspfunc.S,v 1.1 2025/04/21 02:33:44 riastradh Exp $") + +/* + * contextspfunc() + * + * makecontext(3) function. Store the stack pointer on entry at + * the global variable contextsp and call contextdone. + */ +ENTRY(contextspfunc) + call getpc_eax + addl $_GLOBAL_OFFSET_TABLE_,%eax + movl _C_LABEL(contextsp)@GOT(%eax),%eax + movl %esp,(%eax) + jmp _C_LABEL(contextdone)@PLT +END(contextspfunc) + + .text + _ALIGN_TEXT + .local getpc_eax + .type getpc_eax,@function +getpc_eax: + movl (%esp),%eax + ret +END(getpc_eax) diff --git a/kernel/arch/i386/execregs.c b/kernel/arch/i386/execregs.c new file mode 100644 index 000000000000..477cd82989e9 --- /dev/null +++ b/kernel/arch/i386/execregs.c @@ -0,0 +1,132 @@ +/* $NetBSD: execregs.c,v 1.1 2025/02/27 00:55:32 riastradh Exp $ */ + +/*- + * Copyright (c) 2025 The NetBSD Foundation, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__RCSID("$NetBSD: execregs.c,v 1.1 2025/02/27 00:55:32 riastradh Exp $"); + +#include "execregs.h" + +#include <errno.h> +#include <spawn.h> +#include <stddef.h> +#include <unistd.h> + +extern char **environ; + +static unsigned long +nonnull(unsigned long x) +{ + + x |= x << 8; + x |= x << 16; + return x; +} + +int +execregschild(char *path) +{ + register long edi __asm("edi") = nonnull('d'); + register long esi __asm("esi") = nonnull('s'); + /* ebp: frame pointer, can't touch that here, but it'll be nonnull */ + /* ebx: ps_strings, passed to child */ + register long edx __asm("edx") = nonnull('x'); + register long ecx __asm("ecx") = nonnull('c'); + register long eax __asm("eax") = nonnull('a'); + + char *argv[] = {path, NULL}; + char **envp = environ; + + /* + * Not perfect -- compiler might use some registers for + * stack/argument transfers, but all the arguments are nonnull + * so this is probably a good test anyway. + */ + __asm volatile("" : + "+r"(edi), + "+r"(esi), + "+r"(edx), + "+r"(ecx), + "+r"(eax) + :: "memory"); + + return execve(path, argv, envp); +} + +pid_t +spawnregschild(char *path, int fd) +{ + register long edi __asm("edi") = nonnull('d'); + register long esi __asm("esi") = nonnull('s'); + /* ebp: frame pointer, can't touch that here, but it'll be nonnull */ + /* ebx: ps_strings, passed to child */ + register long edx __asm("edx") = nonnull('x'); + register long ecx __asm("ecx") = nonnull('c'); + register long eax __asm("eax") = nonnull('a'); + + char *argv[] = {path, NULL}; + char **envp = environ; + posix_spawn_file_actions_t fileacts; + posix_spawnattr_t attr; + pid_t pid; + int error; + + error = posix_spawn_file_actions_init(&fileacts); + if (error) + goto out; + error = posix_spawn_file_actions_adddup2(&fileacts, fd, STDOUT_FILENO); + if (error) + goto out; + error = posix_spawnattr_init(&attr); + if (error) + goto out; + + /* + * Not perfect -- compiler might use some registers for + * stack/argument transfers, but all the arguments are nonnull + * so this is probably a good test anyway. + */ + __asm volatile("" : + "+r"(edi), + "+r"(esi), + "+r"(edx), + "+r"(ecx), + "+r"(eax) + :: "memory"); + + error = posix_spawn(&pid, path, &fileacts, &attr, argv, envp); + if (error) + goto out; + +out: posix_spawnattr_destroy(&attr); + posix_spawn_file_actions_destroy(&fileacts); + if (error) { + errno = error; + return -1; + } + return 0; +} diff --git a/kernel/arch/i386/execregs.h b/kernel/arch/i386/execregs.h new file mode 100644 index 000000000000..f512bbabc1c7 --- /dev/null +++ b/kernel/arch/i386/execregs.h @@ -0,0 +1,69 @@ +/* $NetBSD: execregs.h,v 1.1 2025/02/27 00:55:32 riastradh Exp $ */ + +/*- + * Copyright (c) 2025 The NetBSD Foundation, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef TESTS_KERNEL_ARCH_I386_EXECREGS_H +#define TESTS_KERNEL_ARCH_I386_EXECREGS_H + +#include <sys/cdefs.h> + +#define NEXECREGS 6 + +#ifndef _LOCORE + +#include <unistd.h> + +/* + * Ordered by struct trapframe in sys/arch/i386/include/frame.h for + * convenience of auditing. Must match h_execregs.S. + */ +static const char *const regname[] = { + /* gs/fs/es/ds: segment registers, not really registers */ + "edi", + "esi", + "ebp", + /* ebx: ps_strings */ + "edx", + "ecx", + "eax", + /* trapno: not a register */ + /* err: not a register */ + /* eip: instruction pointer */ + /* cs: segment register */ + /* eflags */ + /* esp: stack pointer */ + /* ss: stack selector */ +}; + +__CTASSERT(NEXECREGS == __arraycount(regname)); + +int execregschild(char *); +pid_t spawnregschild(char *, int); + +#endif /* _LOCORE */ + +#endif /* TESTS_KERNEL_ARCH_I386_EXECREGS_H */ diff --git a/kernel/arch/i386/execsp.S b/kernel/arch/i386/execsp.S new file mode 100644 index 000000000000..133af37715ad --- /dev/null +++ b/kernel/arch/i386/execsp.S @@ -0,0 +1,112 @@ +/* $NetBSD: execsp.S,v 1.1 2025/04/20 22:33:13 riastradh Exp $ */ + +/*- + * Copyright (c) 2025 The NetBSD Foundation, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#define _LOCORE + +#include <machine/asm.h> + +RCSID("$NetBSD: execsp.S,v 1.1 2025/04/20 22:33:13 riastradh Exp $") + +/* + * void execsp_start(void (*cleanup@edx)(void), void *obj_main@ecx, + * struct ps_strings *ps_strings@ebx) + * + * ELF entry point. Saves the stack pointer in startsp and defers + * to the usual csu __start routine. + */ +ENTRY(execsp_start) + call getpc_eax + addl $_GLOBAL_OFFSET_TABLE_,%eax + movl _C_LABEL(startsp)@GOT(%eax),%eax + movl %esp,(%eax) + jmp _C_LABEL(__start)@PLT +END(execsp_start) + +/* + * void execsp_ctor(void) + * + * ELF constructor. Saves the stack pointer in ctorsp and + * returns. + */ +ENTRY(execsp_ctor) + call getpc_eax + addl $_GLOBAL_OFFSET_TABLE_,%eax + movl _C_LABEL(ctorsp)@GOT(%eax),%eax + movl %esp,(%eax) + ret +END(execsp_ctor) + + /* Make execsp_ctor a constructor. */ + .section .ctors,"aw",@progbits + .p2align 2 + .long _C_LABEL(execsp_ctor) + +/* + * int main(int argc@rdi, char **argv@rsi, ...) + * + * Main function. Saves the stack pointer in mainsp and returns + * zero. We will call execsp_main in execsp_dtor once dtorsp has + * been initialized. + */ +ENTRY(main) + call getpc_eax + addl $_GLOBAL_OFFSET_TABLE_,%eax + movl _C_LABEL(mainsp)@GOT(%eax),%eax + movl %esp,(%eax) + xorl %eax,%eax + ret +END(main) + +/* + * void execsp_dtor(void) + * + * ELF destructor. Saves the stack pointer in dtorsp and defers + * to the C execsp_main in h_execsp.c to report the stack pointers + * back to the t_signal_and_sp parent. + */ +ENTRY(execsp_dtor) + call getpc_eax + addl $_GLOBAL_OFFSET_TABLE_,%eax + movl _C_LABEL(dtorsp)@GOT(%eax),%eax + movl %esp,(%eax) + jmp _C_LABEL(execsp_main)@PLT +END(execsp_dtor) + + /* Make execsp_ctor a destructor. */ + .section .dtors,"aw",@progbits + .p2align 2 + .long _C_LABEL(execsp_dtor) + + .text + _ALIGN_TEXT + .local getpc_eax + .type getpc_eax,@function +getpc_eax: + movl (%esp),%eax + ret +END(getpc_eax) diff --git a/kernel/arch/i386/h_execregs.S b/kernel/arch/i386/h_execregs.S new file mode 100644 index 000000000000..ac9b843f9d86 --- /dev/null +++ b/kernel/arch/i386/h_execregs.S @@ -0,0 +1,85 @@ +/* $NetBSD: h_execregs.S,v 1.1 2025/02/27 00:55:32 riastradh Exp $ */ + +/*- + * Copyright (c) 2025 The NetBSD Foundation, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#define _LOCORE + +#include <sys/syscall.h> + +#include <machine/asm.h> + +#include "execregs.h" + +ENTRY(execregs_start) + andl $-0x4,%esp /* align stack to 4-byte boundary */ + + /* store registers to a buffer on stack */ + subl $(NEXECREGS*4),%esp /* space for NEXECREGS registers */ + movl %edi,0*4(%esp) /* order matches execregs.h */ + movl %esi,1*4(%esp) + movl %ebp,2*4(%esp) + movl %edx,3*4(%esp) + movl %ecx,4*4(%esp) + movl %eax,5*4(%esp) + + /* call write(STDOUT_FILENO, regs, sizeof(regs)) */ + movl %esp,%eax /* eax := regs */ + pushl $(NEXECREGS*4) /* arg2 := sizeof(regs) */ + pushl %eax /* arg1 := regs */ + pushl $0x1 /* arg0 := STDOUT_FILENO */ + call execregs_write + + jb 2f /* bail if write failed */ + cmpl $(NEXECREGS*4),%eax /* bail if wrote wrong # of bytes */ + jne 2f + + /* call exit(0) */ + pushl $0 /* arg0 := 0 */ +1: call execregs_exit + hlt /* paranoia */ + +2: /* call exit(127) */ + pushl $127 /* arg0 := 127 */ + jmp 1b +END(execregs_start) + +ENTRY(execregs_write) + movl $SYS_write,%eax /* syscall number */ + int $0x80 + retl +END(execregs_write) + +ENTRY(execregs_exit) + movl $SYS_exit,%eax /* syscall number */ + int $0x80 + hlt +END(execregs_exit) + +/* main stub to simplify linking */ +ENTRY(main) + hlt +END(main) diff --git a/kernel/arch/i386/signalsphandler.S b/kernel/arch/i386/signalsphandler.S new file mode 100644 index 000000000000..418825e78ab6 --- /dev/null +++ b/kernel/arch/i386/signalsphandler.S @@ -0,0 +1,56 @@ +/* $NetBSD: signalsphandler.S,v 1.1 2025/04/20 22:33:13 riastradh Exp $ */ + +/*- + * Copyright (c) 2025 The NetBSD Foundation, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#define _LOCORE + +#include <machine/asm.h> + +RCSID("$NetBSD: signalsphandler.S,v 1.1 2025/04/20 22:33:13 riastradh Exp $") + +/* + * signalsphandler(signo@esp[4]) + * + * Signal handler. Store the stack pointer on entry at the global + * variable signalsp and return. + */ +ENTRY(signalsphandler) + call getpc_eax + addl $_GLOBAL_OFFSET_TABLE_,%eax + movl _C_LABEL(signalsp)@GOT(%eax),%eax + movl %esp,(%eax) + ret +END(signalsphandler) + + .text + _ALIGN_TEXT + .local getpc_eax + .type getpc_eax,@function +getpc_eax: + movl (%esp),%eax + ret +END(getpc_eax) diff --git a/kernel/arch/i386/stack_pointer.h b/kernel/arch/i386/stack_pointer.h new file mode 100644 index 000000000000..6c95a28ab7b6 --- /dev/null +++ b/kernel/arch/i386/stack_pointer.h @@ -0,0 +1,35 @@ +/* $NetBSD: stack_pointer.h,v 1.1 2025/04/20 22:33:13 riastradh Exp $ */ + +/* + * Copyright (c) 2025 The NetBSD Foundation, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef TESTS_KERNEL_ARCH_I386_STACK_POINTER_H +#define TESTS_KERNEL_ARCH_I386_STACK_POINTER_H + +#define MISALIGN_SP __asm __volatile("addl $-1,%esp") +#define FIX_SP __asm __volatile("addl $1,%esp") + +#endif /* TESTS_KERNEL_ARCH_I386_STACK_POINTER_H */ diff --git a/kernel/arch/i386/threadspfunc.S b/kernel/arch/i386/threadspfunc.S new file mode 100644 index 000000000000..af03ff4c550e --- /dev/null +++ b/kernel/arch/i386/threadspfunc.S @@ -0,0 +1,43 @@ +/* $NetBSD: threadspfunc.S,v 1.1 2025/04/21 02:33:44 riastradh Exp $ */ + +/*- + * Copyright (c) 2025 The NetBSD Foundation, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#define _LOCORE + +#include <machine/asm.h> + +RCSID("$NetBSD: threadspfunc.S,v 1.1 2025/04/21 02:33:44 riastradh Exp $") + +/* + * void *threadspfunc(void *cookie@esp[4]) + * + * pthread_create(3) function. Return the stack pointer on entry. + */ +ENTRY(threadspfunc) + mov %esp,%eax + ret +END(threadspfunc) |