diff options
Diffstat (limited to 'arch/um/sys-x86/shared/sysdep')
37 files changed, 1200 insertions, 0 deletions
diff --git a/arch/um/sys-x86/shared/sysdep/archsetjmp.h b/arch/um/sys-x86/shared/sysdep/archsetjmp.h new file mode 100644 index 000000000000..ff7766d28226 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/archsetjmp.h @@ -0,0 +1,5 @@ +#ifdef __i386__ +#include "archsetjmp_32.h" +#else +#include "archsetjmp_64.h" +#endif diff --git a/arch/um/sys-x86/shared/sysdep/archsetjmp_32.h b/arch/um/sys-x86/shared/sysdep/archsetjmp_32.h new file mode 100644 index 000000000000..0f312085ce1d --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/archsetjmp_32.h @@ -0,0 +1,22 @@ +/* + * arch/um/include/sysdep-i386/archsetjmp.h + */ + +#ifndef _KLIBC_ARCHSETJMP_H +#define _KLIBC_ARCHSETJMP_H + +struct __jmp_buf { + unsigned int __ebx; + unsigned int __esp; + unsigned int __ebp; + unsigned int __esi; + unsigned int __edi; + unsigned int __eip; +}; + +typedef struct __jmp_buf jmp_buf[1]; + +#define JB_IP __eip +#define JB_SP __esp + +#endif /* _SETJMP_H */ diff --git a/arch/um/sys-x86/shared/sysdep/archsetjmp_64.h b/arch/um/sys-x86/shared/sysdep/archsetjmp_64.h new file mode 100644 index 000000000000..2af8f12ca161 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/archsetjmp_64.h @@ -0,0 +1,24 @@ +/* + * arch/um/include/sysdep-x86_64/archsetjmp.h + */ + +#ifndef _KLIBC_ARCHSETJMP_H +#define _KLIBC_ARCHSETJMP_H + +struct __jmp_buf { + unsigned long __rbx; + unsigned long __rsp; + unsigned long __rbp; + unsigned long __r12; + unsigned long __r13; + unsigned long __r14; + unsigned long __r15; + unsigned long __rip; +}; + +typedef struct __jmp_buf jmp_buf[1]; + +#define JB_IP __rip +#define JB_SP __rsp + +#endif /* _SETJMP_H */ diff --git a/arch/um/sys-x86/shared/sysdep/barrier.h b/arch/um/sys-x86/shared/sysdep/barrier.h new file mode 100644 index 000000000000..89ee23bc8da4 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/barrier.h @@ -0,0 +1,5 @@ +#ifdef __i386__ +#include "barrier_32.h" +#else +#include "barrier_64.h" +#endif diff --git a/arch/um/sys-x86/shared/sysdep/barrier_32.h b/arch/um/sys-x86/shared/sysdep/barrier_32.h new file mode 100644 index 000000000000..b58d52c5b2f4 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/barrier_32.h @@ -0,0 +1,9 @@ +#ifndef __SYSDEP_I386_BARRIER_H +#define __SYSDEP_I386_BARRIER_H + +/* Copied from include/asm-i386 for use by userspace. i386 has the option + * of using mfence, but I'm just using this, which works everywhere, for now. + */ +#define mb() asm volatile("lock; addl $0,0(%esp)") + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/barrier_64.h b/arch/um/sys-x86/shared/sysdep/barrier_64.h new file mode 100644 index 000000000000..7b610befdc8f --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/barrier_64.h @@ -0,0 +1,7 @@ +#ifndef __SYSDEP_X86_64_BARRIER_H +#define __SYSDEP_X86_64_BARRIER_H + +/* Copied from include/asm-x86_64 for use by userspace. */ +#define mb() asm volatile("mfence":::"memory") + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/faultinfo.h b/arch/um/sys-x86/shared/sysdep/faultinfo.h new file mode 100644 index 000000000000..862ecb1c7781 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/faultinfo.h @@ -0,0 +1,5 @@ +#ifdef __i386__ +#include "faultinfo_32.h" +#else +#include "faultinfo_64.h" +#endif diff --git a/arch/um/sys-x86/shared/sysdep/faultinfo_32.h b/arch/um/sys-x86/shared/sysdep/faultinfo_32.h new file mode 100644 index 000000000000..db437cc373bc --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/faultinfo_32.h @@ -0,0 +1,29 @@ +/* + * Copyright (C) 2004 Fujitsu Siemens Computers GmbH + * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com> + * Licensed under the GPL + */ + +#ifndef __FAULTINFO_I386_H +#define __FAULTINFO_I386_H + +/* this structure contains the full arch-specific faultinfo + * from the traps. + * On i386, ptrace_faultinfo unfortunately doesn't provide + * all the info, since trap_no is missing. + * All common elements are defined at the same position in + * both structures, thus making it easy to copy the + * contents without knowledge about the structure elements. + */ +struct faultinfo { + int error_code; /* in ptrace_faultinfo misleadingly called is_write */ + unsigned long cr2; /* in ptrace_faultinfo called addr */ + int trap_no; /* missing in ptrace_faultinfo */ +}; + +#define FAULT_WRITE(fi) ((fi).error_code & 2) +#define FAULT_ADDRESS(fi) ((fi).cr2) + +#define PTRACE_FULL_FAULTINFO 0 + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/faultinfo_64.h b/arch/um/sys-x86/shared/sysdep/faultinfo_64.h new file mode 100644 index 000000000000..cb917b0d5660 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/faultinfo_64.h @@ -0,0 +1,29 @@ +/* + * Copyright (C) 2004 Fujitsu Siemens Computers GmbH + * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com> + * Licensed under the GPL + */ + +#ifndef __FAULTINFO_X86_64_H +#define __FAULTINFO_X86_64_H + +/* this structure contains the full arch-specific faultinfo + * from the traps. + * On i386, ptrace_faultinfo unfortunately doesn't provide + * all the info, since trap_no is missing. + * All common elements are defined at the same position in + * both structures, thus making it easy to copy the + * contents without knowledge about the structure elements. + */ +struct faultinfo { + int error_code; /* in ptrace_faultinfo misleadingly called is_write */ + unsigned long cr2; /* in ptrace_faultinfo called addr */ + int trap_no; /* missing in ptrace_faultinfo */ +}; + +#define FAULT_WRITE(fi) ((fi).error_code & 2) +#define FAULT_ADDRESS(fi) ((fi).cr2) + +#define PTRACE_FULL_FAULTINFO 1 + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/host_ldt.h b/arch/um/sys-x86/shared/sysdep/host_ldt.h new file mode 100644 index 000000000000..94518b3e0da5 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/host_ldt.h @@ -0,0 +1,5 @@ +#ifdef __i386__ +#include "host_ldt_32.h" +#else +#include "host_ldt_64.h" +#endif diff --git a/arch/um/sys-x86/shared/sysdep/host_ldt_32.h b/arch/um/sys-x86/shared/sysdep/host_ldt_32.h new file mode 100644 index 000000000000..0953cc4df652 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/host_ldt_32.h @@ -0,0 +1,34 @@ +#ifndef __ASM_HOST_LDT_I386_H +#define __ASM_HOST_LDT_I386_H + +#include <asm/ldt.h> + +/* + * macros stolen from include/asm-i386/desc.h + */ +#define LDT_entry_a(info) \ + ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) + +#define LDT_entry_b(info) \ + (((info)->base_addr & 0xff000000) | \ + (((info)->base_addr & 0x00ff0000) >> 16) | \ + ((info)->limit & 0xf0000) | \ + (((info)->read_exec_only ^ 1) << 9) | \ + ((info)->contents << 10) | \ + (((info)->seg_not_present ^ 1) << 15) | \ + ((info)->seg_32bit << 22) | \ + ((info)->limit_in_pages << 23) | \ + ((info)->useable << 20) | \ + 0x7000) + +#define LDT_empty(info) (\ + (info)->base_addr == 0 && \ + (info)->limit == 0 && \ + (info)->contents == 0 && \ + (info)->read_exec_only == 1 && \ + (info)->seg_32bit == 0 && \ + (info)->limit_in_pages == 0 && \ + (info)->seg_not_present == 1 && \ + (info)->useable == 0 ) + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/host_ldt_64.h b/arch/um/sys-x86/shared/sysdep/host_ldt_64.h new file mode 100644 index 000000000000..e8b1be1e154f --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/host_ldt_64.h @@ -0,0 +1,38 @@ +#ifndef __ASM_HOST_LDT_X86_64_H +#define __ASM_HOST_LDT_X86_64_H + +#include <asm/ldt.h> + +/* + * macros stolen from include/asm-x86_64/desc.h + */ +#define LDT_entry_a(info) \ + ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) + +/* Don't allow setting of the lm bit. It is useless anyways because + * 64bit system calls require __USER_CS. */ +#define LDT_entry_b(info) \ + (((info)->base_addr & 0xff000000) | \ + (((info)->base_addr & 0x00ff0000) >> 16) | \ + ((info)->limit & 0xf0000) | \ + (((info)->read_exec_only ^ 1) << 9) | \ + ((info)->contents << 10) | \ + (((info)->seg_not_present ^ 1) << 15) | \ + ((info)->seg_32bit << 22) | \ + ((info)->limit_in_pages << 23) | \ + ((info)->useable << 20) | \ + /* ((info)->lm << 21) | */ \ + 0x7000) + +#define LDT_empty(info) (\ + (info)->base_addr == 0 && \ + (info)->limit == 0 && \ + (info)->contents == 0 && \ + (info)->read_exec_only == 1 && \ + (info)->seg_32bit == 0 && \ + (info)->limit_in_pages == 0 && \ + (info)->seg_not_present == 1 && \ + (info)->useable == 0 && \ + (info)->lm == 0) + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/kernel-offsets.h b/arch/um/sys-x86/shared/sysdep/kernel-offsets.h new file mode 100644 index 000000000000..346bc086fb91 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/kernel-offsets.h @@ -0,0 +1,5 @@ +#ifdef __i386__ +#include "kernel-offsets_32.h" +#else +#include "kernel-offsets_64.h" +#endif diff --git a/arch/um/sys-x86/shared/sysdep/kernel-offsets_32.h b/arch/um/sys-x86/shared/sysdep/kernel-offsets_32.h new file mode 100644 index 000000000000..5868526b5eef --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/kernel-offsets_32.h @@ -0,0 +1,21 @@ +#include <linux/stddef.h> +#include <linux/sched.h> +#include <linux/elf.h> +#include <linux/crypto.h> +#include <asm/mman.h> + +#define DEFINE(sym, val) \ + asm volatile("\n->" #sym " %0 " #val : : "i" (val)) + +#define STR(x) #x +#define DEFINE_STR(sym, val) asm volatile("\n->" #sym " " STR(val) " " #val: : ) + +#define BLANK() asm volatile("\n->" : : ) + +#define OFFSET(sym, str, mem) \ + DEFINE(sym, offsetof(struct str, mem)); + +void foo(void) +{ +#include <common-offsets.h> +} diff --git a/arch/um/sys-x86/shared/sysdep/kernel-offsets_64.h b/arch/um/sys-x86/shared/sysdep/kernel-offsets_64.h new file mode 100644 index 000000000000..a307237b7964 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/kernel-offsets_64.h @@ -0,0 +1,23 @@ +#include <linux/stddef.h> +#include <linux/sched.h> +#include <linux/time.h> +#include <linux/elf.h> +#include <linux/crypto.h> +#include <asm/page.h> +#include <asm/mman.h> + +#define DEFINE(sym, val) \ + asm volatile("\n->" #sym " %0 " #val : : "i" (val)) + +#define DEFINE_STR1(x) #x +#define DEFINE_STR(sym, val) asm volatile("\n->" #sym " " DEFINE_STR1(val) " " #val: : ) + +#define BLANK() asm volatile("\n->" : : ) + +#define OFFSET(sym, str, mem) \ + DEFINE(sym, offsetof(struct str, mem)); + +void foo(void) +{ +#include <common-offsets.h> +} diff --git a/arch/um/sys-x86/shared/sysdep/ptrace.h b/arch/um/sys-x86/shared/sysdep/ptrace.h new file mode 100644 index 000000000000..711b1621747f --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/ptrace.h @@ -0,0 +1,5 @@ +#ifdef __i386__ +#include "ptrace_32.h" +#else +#include "ptrace_64.h" +#endif diff --git a/arch/um/sys-x86/shared/sysdep/ptrace_32.h b/arch/um/sys-x86/shared/sysdep/ptrace_32.h new file mode 100644 index 000000000000..6096c8f89f4f --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/ptrace_32.h @@ -0,0 +1,116 @@ +/* + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + * Licensed under the GPL + */ + +#ifndef __SYSDEP_I386_PTRACE_H +#define __SYSDEP_I386_PTRACE_H + +#include <generated/user_constants.h> +#include "sysdep/faultinfo.h" + +#define MAX_REG_NR (UM_FRAME_SIZE / sizeof(unsigned long)) +#define MAX_REG_OFFSET (UM_FRAME_SIZE) + +static inline void update_debugregs(int seq) {} + +/* syscall emulation path in ptrace */ + +#ifndef PTRACE_SYSEMU +#define PTRACE_SYSEMU 31 +#endif + +void set_using_sysemu(int value); +int get_using_sysemu(void); +extern int sysemu_supported; + +#define REGS_IP(r) ((r)[HOST_IP]) +#define REGS_SP(r) ((r)[HOST_SP]) +#define REGS_EFLAGS(r) ((r)[HOST_EFLAGS]) +#define REGS_EAX(r) ((r)[HOST_EAX]) +#define REGS_EBX(r) ((r)[HOST_EBX]) +#define REGS_ECX(r) ((r)[HOST_ECX]) +#define REGS_EDX(r) ((r)[HOST_EDX]) +#define REGS_ESI(r) ((r)[HOST_ESI]) +#define REGS_EDI(r) ((r)[HOST_EDI]) +#define REGS_EBP(r) ((r)[HOST_EBP]) +#define REGS_CS(r) ((r)[HOST_CS]) +#define REGS_SS(r) ((r)[HOST_SS]) +#define REGS_DS(r) ((r)[HOST_DS]) +#define REGS_ES(r) ((r)[HOST_ES]) +#define REGS_FS(r) ((r)[HOST_FS]) +#define REGS_GS(r) ((r)[HOST_GS]) + +#define REGS_SET_SYSCALL_RETURN(r, res) REGS_EAX(r) = (res) + +#define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r)) + +#ifndef PTRACE_SYSEMU_SINGLESTEP +#define PTRACE_SYSEMU_SINGLESTEP 32 +#endif + +struct uml_pt_regs { + unsigned long gp[MAX_REG_NR]; + unsigned long fp[HOST_FPX_SIZE]; + struct faultinfo faultinfo; + long syscall; + int is_user; +}; + +#define EMPTY_UML_PT_REGS { } + +#define UPT_IP(r) REGS_IP((r)->gp) +#define UPT_SP(r) REGS_SP((r)->gp) +#define UPT_EFLAGS(r) REGS_EFLAGS((r)->gp) +#define UPT_EAX(r) REGS_EAX((r)->gp) +#define UPT_EBX(r) REGS_EBX((r)->gp) +#define UPT_ECX(r) REGS_ECX((r)->gp) +#define UPT_EDX(r) REGS_EDX((r)->gp) +#define UPT_ESI(r) REGS_ESI((r)->gp) +#define UPT_EDI(r) REGS_EDI((r)->gp) +#define UPT_EBP(r) REGS_EBP((r)->gp) +#define UPT_ORIG_EAX(r) ((r)->syscall) +#define UPT_CS(r) REGS_CS((r)->gp) +#define UPT_SS(r) REGS_SS((r)->gp) +#define UPT_DS(r) REGS_DS((r)->gp) +#define UPT_ES(r) REGS_ES((r)->gp) +#define UPT_FS(r) REGS_FS((r)->gp) +#define UPT_GS(r) REGS_GS((r)->gp) + +#define UPT_SYSCALL_ARG1(r) UPT_EBX(r) +#define UPT_SYSCALL_ARG2(r) UPT_ECX(r) +#define UPT_SYSCALL_ARG3(r) UPT_EDX(r) +#define UPT_SYSCALL_ARG4(r) UPT_ESI(r) +#define UPT_SYSCALL_ARG5(r) UPT_EDI(r) +#define UPT_SYSCALL_ARG6(r) UPT_EBP(r) + +extern int user_context(unsigned long sp); + +#define UPT_IS_USER(r) ((r)->is_user) + +struct syscall_args { + unsigned long args[6]; +}; + +#define SYSCALL_ARGS(r) ((struct syscall_args) \ + { .args = { UPT_SYSCALL_ARG1(r), \ + UPT_SYSCALL_ARG2(r), \ + UPT_SYSCALL_ARG3(r), \ + UPT_SYSCALL_ARG4(r), \ + UPT_SYSCALL_ARG5(r), \ + UPT_SYSCALL_ARG6(r) } } ) + +#define UPT_SET_SYSCALL_RETURN(r, res) \ + REGS_SET_SYSCALL_RETURN((r)->regs, (res)) + +#define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->gp) + +#define UPT_ORIG_SYSCALL(r) UPT_EAX(r) +#define UPT_SYSCALL_NR(r) UPT_ORIG_EAX(r) +#define UPT_SYSCALL_RET(r) UPT_EAX(r) + +#define UPT_FAULTINFO(r) (&(r)->faultinfo) + +extern void arch_init_registers(int pid); + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/ptrace_64.h b/arch/um/sys-x86/shared/sysdep/ptrace_64.h new file mode 100644 index 000000000000..9ed4597fa942 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/ptrace_64.h @@ -0,0 +1,163 @@ +/* + * Copyright 2003 PathScale, Inc. + * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + * + * Licensed under the GPL + */ + +#ifndef __SYSDEP_X86_64_PTRACE_H +#define __SYSDEP_X86_64_PTRACE_H + +#include <generated/user_constants.h> +#include "sysdep/faultinfo.h" + +#define MAX_REG_OFFSET (UM_FRAME_SIZE) +#define MAX_REG_NR ((MAX_REG_OFFSET) / sizeof(unsigned long)) + +#define REGS_IP(r) ((r)[HOST_IP]) +#define REGS_SP(r) ((r)[HOST_SP]) + +#define REGS_RBX(r) ((r)[HOST_RBX]) +#define REGS_RCX(r) ((r)[HOST_RCX]) +#define REGS_RDX(r) ((r)[HOST_RDX]) +#define REGS_RSI(r) ((r)[HOST_RSI]) +#define REGS_RDI(r) ((r)[HOST_RDI]) +#define REGS_RBP(r) ((r)[HOST_RBP]) +#define REGS_RAX(r) ((r)[HOST_RAX]) +#define REGS_R8(r) ((r)[HOST_R8]) +#define REGS_R9(r) ((r)[HOST_R9]) +#define REGS_R10(r) ((r)[HOST_R10]) +#define REGS_R11(r) ((r)[HOST_R11]) +#define REGS_R12(r) ((r)[HOST_R12]) +#define REGS_R13(r) ((r)[HOST_R13]) +#define REGS_R14(r) ((r)[HOST_R14]) +#define REGS_R15(r) ((r)[HOST_R15]) +#define REGS_CS(r) ((r)[HOST_CS]) +#define REGS_EFLAGS(r) ((r)[HOST_EFLAGS]) +#define REGS_SS(r) ((r)[HOST_SS]) + +#define HOST_FS_BASE 21 +#define HOST_GS_BASE 22 +#define HOST_DS 23 +#define HOST_ES 24 +#define HOST_FS 25 +#define HOST_GS 26 + +/* Also defined in asm/ptrace-x86_64.h, but not in libc headers. So, these + * are already defined for kernel code, but not for userspace code. + */ +#ifndef FS_BASE +/* These aren't defined in ptrace.h, but exist in struct user_regs_struct, + * which is what x86_64 ptrace actually uses. + */ +#define FS_BASE (HOST_FS_BASE * sizeof(long)) +#define GS_BASE (HOST_GS_BASE * sizeof(long)) +#define DS (HOST_DS * sizeof(long)) +#define ES (HOST_ES * sizeof(long)) +#define FS (HOST_FS * sizeof(long)) +#define GS (HOST_GS * sizeof(long)) +#endif + +#define REGS_FS_BASE(r) ((r)[HOST_FS_BASE]) +#define REGS_GS_BASE(r) ((r)[HOST_GS_BASE]) +#define REGS_DS(r) ((r)[HOST_DS]) +#define REGS_ES(r) ((r)[HOST_ES]) +#define REGS_FS(r) ((r)[HOST_FS]) +#define REGS_GS(r) ((r)[HOST_GS]) + +#define REGS_ORIG_RAX(r) ((r)[HOST_ORIG_RAX]) + +#define REGS_SET_SYSCALL_RETURN(r, res) REGS_RAX(r) = (res) + +#define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r)) + +#define REGS_SEGV_IS_FIXABLE(r) SEGV_IS_FIXABLE((r)->trap_type) + +#define REGS_FAULT_ADDR(r) ((r)->fault_addr) + +#define REGS_FAULT_WRITE(r) FAULT_WRITE((r)->fault_type) + +#define REGS_TRAP(r) ((r)->trap_type) + +#define REGS_ERR(r) ((r)->fault_type) + +struct uml_pt_regs { + unsigned long gp[MAX_REG_NR]; + unsigned long fp[HOST_FP_SIZE]; + struct faultinfo faultinfo; + long syscall; + int is_user; +}; + +#define EMPTY_UML_PT_REGS { } + +#define UPT_RBX(r) REGS_RBX((r)->gp) +#define UPT_RCX(r) REGS_RCX((r)->gp) +#define UPT_RDX(r) REGS_RDX((r)->gp) +#define UPT_RSI(r) REGS_RSI((r)->gp) +#define UPT_RDI(r) REGS_RDI((r)->gp) +#define UPT_RBP(r) REGS_RBP((r)->gp) +#define UPT_RAX(r) REGS_RAX((r)->gp) +#define UPT_R8(r) REGS_R8((r)->gp) +#define UPT_R9(r) REGS_R9((r)->gp) +#define UPT_R10(r) REGS_R10((r)->gp) +#define UPT_R11(r) REGS_R11((r)->gp) +#define UPT_R12(r) REGS_R12((r)->gp) +#define UPT_R13(r) REGS_R13((r)->gp) +#define UPT_R14(r) REGS_R14((r)->gp) +#define UPT_R15(r) REGS_R15((r)->gp) +#define UPT_CS(r) REGS_CS((r)->gp) +#define UPT_FS_BASE(r) REGS_FS_BASE((r)->gp) +#define UPT_FS(r) REGS_FS((r)->gp) +#define UPT_GS_BASE(r) REGS_GS_BASE((r)->gp) +#define UPT_GS(r) REGS_GS((r)->gp) +#define UPT_DS(r) REGS_DS((r)->gp) +#define UPT_ES(r) REGS_ES((r)->gp) +#define UPT_CS(r) REGS_CS((r)->gp) +#define UPT_SS(r) REGS_SS((r)->gp) +#define UPT_ORIG_RAX(r) REGS_ORIG_RAX((r)->gp) + +#define UPT_IP(r) REGS_IP((r)->gp) +#define UPT_SP(r) REGS_SP((r)->gp) + +#define UPT_EFLAGS(r) REGS_EFLAGS((r)->gp) +#define UPT_SYSCALL_NR(r) ((r)->syscall) +#define UPT_SYSCALL_RET(r) UPT_RAX(r) + +extern int user_context(unsigned long sp); + +#define UPT_IS_USER(r) ((r)->is_user) + +#define UPT_SYSCALL_ARG1(r) UPT_RDI(r) +#define UPT_SYSCALL_ARG2(r) UPT_RSI(r) +#define UPT_SYSCALL_ARG3(r) UPT_RDX(r) +#define UPT_SYSCALL_ARG4(r) UPT_R10(r) +#define UPT_SYSCALL_ARG5(r) UPT_R8(r) +#define UPT_SYSCALL_ARG6(r) UPT_R9(r) + +struct syscall_args { + unsigned long args[6]; +}; + +#define SYSCALL_ARGS(r) ((struct syscall_args) \ + { .args = { UPT_SYSCALL_ARG1(r), \ + UPT_SYSCALL_ARG2(r), \ + UPT_SYSCALL_ARG3(r), \ + UPT_SYSCALL_ARG4(r), \ + UPT_SYSCALL_ARG5(r), \ + UPT_SYSCALL_ARG6(r) } } ) + +#define UPT_SET_SYSCALL_RETURN(r, res) \ + REGS_SET_SYSCALL_RETURN((r)->regs, (res)) + +#define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->gp) + +#define UPT_SEGV_IS_FIXABLE(r) REGS_SEGV_IS_FIXABLE(&r->skas) + +#define UPT_FAULTINFO(r) (&(r)->faultinfo) + +static inline void arch_init_registers(int pid) +{ +} + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/ptrace_user.h b/arch/um/sys-x86/shared/sysdep/ptrace_user.h new file mode 100644 index 000000000000..a92f883264ed --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/ptrace_user.h @@ -0,0 +1,5 @@ +#ifdef __i386__ +#include "ptrace_user_32.h" +#else +#include "ptrace_user_64.h" +#endif diff --git a/arch/um/sys-x86/shared/sysdep/ptrace_user_32.h b/arch/um/sys-x86/shared/sysdep/ptrace_user_32.h new file mode 100644 index 000000000000..9d88a79a138b --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/ptrace_user_32.h @@ -0,0 +1,26 @@ +/* + * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#ifndef __SYSDEP_I386_PTRACE_USER_H__ +#define __SYSDEP_I386_PTRACE_USER_H__ + +#include <sys/ptrace.h> +#include <linux/ptrace.h> +#include <asm/ptrace.h> +#include <generated/user_constants.h> + +#define PT_OFFSET(r) ((r) * sizeof(long)) + +#define PT_SYSCALL_NR(regs) ((regs)[ORIG_EAX]) +#define PT_SYSCALL_NR_OFFSET PT_OFFSET(ORIG_EAX) + +#define PT_SYSCALL_RET_OFFSET PT_OFFSET(EAX) + +#define REGS_IP_INDEX EIP +#define REGS_SP_INDEX UESP + +#define FP_SIZE ((HOST_FPX_SIZE > HOST_FP_SIZE) ? HOST_FPX_SIZE : HOST_FP_SIZE) + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/ptrace_user_64.h b/arch/um/sys-x86/shared/sysdep/ptrace_user_64.h new file mode 100644 index 000000000000..2f1b6e33d590 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/ptrace_user_64.h @@ -0,0 +1,38 @@ +/* + * Copyright 2003 PathScale, Inc. + * + * Licensed under the GPL + */ + +#ifndef __SYSDEP_X86_64_PTRACE_USER_H__ +#define __SYSDEP_X86_64_PTRACE_USER_H__ + +#define __FRAME_OFFSETS +#include <sys/ptrace.h> +#include <linux/ptrace.h> +#include <asm/ptrace.h> +#undef __FRAME_OFFSETS +#include <generated/user_constants.h> + +#define PT_INDEX(off) ((off) / sizeof(unsigned long)) + +#define PT_SYSCALL_NR(regs) ((regs)[PT_INDEX(ORIG_RAX)]) +#define PT_SYSCALL_NR_OFFSET (ORIG_RAX) + +#define PT_SYSCALL_RET_OFFSET (RAX) + +/* + * x86_64 FC3 doesn't define this in /usr/include/linux/ptrace.h even though + * it's defined in the kernel's include/linux/ptrace.h. Additionally, use the + * 2.4 name and value for 2.4 host compatibility. + */ +#ifndef PTRACE_OLDSETOPTIONS +#define PTRACE_OLDSETOPTIONS 21 +#endif + +#define REGS_IP_INDEX PT_INDEX(RIP) +#define REGS_SP_INDEX PT_INDEX(RSP) + +#define FP_SIZE (HOST_FP_SIZE) + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/sigcontext.h b/arch/um/sys-x86/shared/sysdep/sigcontext.h new file mode 100644 index 000000000000..f7f49f46c23d --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/sigcontext.h @@ -0,0 +1,5 @@ +#ifdef __i386__ +#include "sigcontext_32.h" +#else +#include "sigcontext_64.h" +#endif diff --git a/arch/um/sys-x86/shared/sysdep/sigcontext_32.h b/arch/um/sys-x86/shared/sysdep/sigcontext_32.h new file mode 100644 index 000000000000..382786436194 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/sigcontext_32.h @@ -0,0 +1,33 @@ +/* + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + * Licensed under the GPL + */ + +#ifndef __SYS_SIGCONTEXT_I386_H +#define __SYS_SIGCONTEXT_I386_H + +#include <generated/user_constants.h> + +#define IP_RESTART_SYSCALL(ip) ((ip) -= 2) + +#define SC_OFFSET(sc, field) \ + *((unsigned long *) &(((char *) (sc))[HOST_##field])) + +#define SC_TRAPNO(sc) SC_OFFSET(sc, SC_TRAPNO) +#define SC_ERR(sc) SC_OFFSET(sc, SC_ERR) +#define SC_CR2(sc) SC_OFFSET(sc, SC_CR2) + +#define GET_FAULTINFO_FROM_SC(fi, sc) \ + { \ + (fi).cr2 = SC_CR2(sc); \ + (fi).error_code = SC_ERR(sc); \ + (fi).trap_no = SC_TRAPNO(sc); \ + } + +/* This is Page Fault */ +#define SEGV_IS_FIXABLE(fi) ((fi)->trap_no == 14) + +/* SKAS3 has no trap_no on i386, but get_skas_faultinfo() sets it to 0. */ +#define SEGV_MAYBE_FIXABLE(fi) ((fi)->trap_no == 0 && ptrace_faultinfo) + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/sigcontext_64.h b/arch/um/sys-x86/shared/sysdep/sigcontext_64.h new file mode 100644 index 000000000000..9fb527713efb --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/sigcontext_64.h @@ -0,0 +1,33 @@ +/* + * Copyright 2003 PathScale, Inc. + * + * Licensed under the GPL + */ + +#ifndef __SYSDEP_X86_64_SIGCONTEXT_H +#define __SYSDEP_X86_64_SIGCONTEXT_H + +#include <generated/user_constants.h> + +#define SC_OFFSET(sc, field) \ + *((unsigned long *) &(((char *) (sc))[HOST_##field])) +#define SC_CR2(sc) SC_OFFSET(sc, SC_CR2) +#define SC_ERR(sc) SC_OFFSET(sc, SC_ERR) +#define SC_TRAPNO(sc) SC_OFFSET(sc, SC_TRAPNO) + +#define IP_RESTART_SYSCALL(ip) ((ip) -= 2) + +#define GET_FAULTINFO_FROM_SC(fi, sc) \ + { \ + (fi).cr2 = SC_CR2(sc); \ + (fi).error_code = SC_ERR(sc); \ + (fi).trap_no = SC_TRAPNO(sc); \ + } + +/* This is Page Fault */ +#define SEGV_IS_FIXABLE(fi) ((fi)->trap_no == 14) + +/* No broken SKAS API, which doesn't pass trap_no, here. */ +#define SEGV_MAYBE_FIXABLE(fi) 0 + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/skas_ptrace.h b/arch/um/sys-x86/shared/sysdep/skas_ptrace.h new file mode 100644 index 000000000000..e63b575492ee --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/skas_ptrace.h @@ -0,0 +1,5 @@ +#ifdef __i386__ +#include "skas_ptrace_32.h" +#else +#include "skas_ptrace_64.h" +#endif diff --git a/arch/um/sys-x86/shared/sysdep/skas_ptrace_32.h b/arch/um/sys-x86/shared/sysdep/skas_ptrace_32.h new file mode 100644 index 000000000000..e27b8a791773 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/skas_ptrace_32.h @@ -0,0 +1,22 @@ +/* + * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#ifndef __SYSDEP_I386_SKAS_PTRACE_H +#define __SYSDEP_I386_SKAS_PTRACE_H + +struct ptrace_faultinfo { + int is_write; + unsigned long addr; +}; + +struct ptrace_ldt { + int func; + void *ptr; + unsigned long bytecount; +}; + +#define PTRACE_LDT 54 + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/skas_ptrace_64.h b/arch/um/sys-x86/shared/sysdep/skas_ptrace_64.h new file mode 100644 index 000000000000..95db4be786e4 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/skas_ptrace_64.h @@ -0,0 +1,22 @@ +/* + * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#ifndef __SYSDEP_X86_64_SKAS_PTRACE_H +#define __SYSDEP_X86_64_SKAS_PTRACE_H + +struct ptrace_faultinfo { + int is_write; + unsigned long addr; +}; + +struct ptrace_ldt { + int func; + void *ptr; + unsigned long bytecount; +}; + +#define PTRACE_LDT 54 + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/stub.h b/arch/um/sys-x86/shared/sysdep/stub.h new file mode 100644 index 000000000000..13f523a3fcfa --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/stub.h @@ -0,0 +1,5 @@ +#ifdef __i386__ +#include "stub_32.h" +#else +#include "stub_64.h" +#endif diff --git a/arch/um/sys-x86/shared/sysdep/stub_32.h b/arch/um/sys-x86/shared/sysdep/stub_32.h new file mode 100644 index 000000000000..cca14d4ddf52 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/stub_32.h @@ -0,0 +1,100 @@ +/* + * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL + */ + +#ifndef __SYSDEP_STUB_H +#define __SYSDEP_STUB_H + +#include <sys/mman.h> +#include <asm/ptrace.h> +#include <asm/unistd.h> +#include "as-layout.h" +#include "stub-data.h" + +extern void stub_segv_handler(int sig); +extern void stub_clone_handler(void); + +#define STUB_SYSCALL_RET EAX +#define STUB_MMAP_NR __NR_mmap2 +#define MMAP_OFFSET(o) ((o) >> UM_KERN_PAGE_SHIFT) + +static inline long stub_syscall0(long syscall) +{ + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall)); + + return ret; +} + +static inline long stub_syscall1(long syscall, long arg1) +{ + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1)); + + return ret; +} + +static inline long stub_syscall2(long syscall, long arg1, long arg2) +{ + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), + "c" (arg2)); + + return ret; +} + +static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3) +{ + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), + "c" (arg2), "d" (arg3)); + + return ret; +} + +static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3, + long arg4) +{ + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), + "c" (arg2), "d" (arg3), "S" (arg4)); + + return ret; +} + +static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3, + long arg4, long arg5) +{ + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), + "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5)); + + return ret; +} + +static inline void trap_myself(void) +{ + __asm("int3"); +} + +static inline void remap_stack(int fd, unsigned long offset) +{ + __asm__ volatile ("movl %%eax,%%ebp ; movl %0,%%eax ; int $0x80 ;" + "movl %7, %%ebx ; movl %%eax, (%%ebx)" + : : "g" (STUB_MMAP_NR), "b" (STUB_DATA), + "c" (UM_KERN_PAGE_SIZE), + "d" (PROT_READ | PROT_WRITE), + "S" (MAP_FIXED | MAP_SHARED), "D" (fd), + "a" (offset), + "i" (&((struct stub_data *) STUB_DATA)->err) + : "memory"); +} + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/stub_64.h b/arch/um/sys-x86/shared/sysdep/stub_64.h new file mode 100644 index 000000000000..922a5702c8d8 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/stub_64.h @@ -0,0 +1,106 @@ +/* + * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL + */ + +#ifndef __SYSDEP_STUB_H +#define __SYSDEP_STUB_H + +#include <sys/mman.h> +#include <asm/unistd.h> +#include <sysdep/ptrace_user.h> +#include "as-layout.h" +#include "stub-data.h" + +extern void stub_segv_handler(int sig); +extern void stub_clone_handler(void); + +#define STUB_SYSCALL_RET PT_INDEX(RAX) +#define STUB_MMAP_NR __NR_mmap +#define MMAP_OFFSET(o) (o) + +#define __syscall_clobber "r11","rcx","memory" +#define __syscall "syscall" + +static inline long stub_syscall0(long syscall) +{ + long ret; + + __asm__ volatile (__syscall + : "=a" (ret) + : "0" (syscall) : __syscall_clobber ); + + return ret; +} + +static inline long stub_syscall2(long syscall, long arg1, long arg2) +{ + long ret; + + __asm__ volatile (__syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2) : __syscall_clobber ); + + return ret; +} + +static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3) +{ + long ret; + + __asm__ volatile (__syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3) + : __syscall_clobber ); + + return ret; +} + +static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3, + long arg4) +{ + long ret; + + __asm__ volatile ("movq %5,%%r10 ; " __syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3), + "g" (arg4) + : __syscall_clobber, "r10" ); + + return ret; +} + +static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3, + long arg4, long arg5) +{ + long ret; + + __asm__ volatile ("movq %5,%%r10 ; movq %6,%%r8 ; " __syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3), + "g" (arg4), "g" (arg5) + : __syscall_clobber, "r10", "r8" ); + + return ret; +} + +static inline void trap_myself(void) +{ + __asm("int3"); +} + +static inline void remap_stack(long fd, unsigned long offset) +{ + __asm__ volatile ("movq %4,%%r10 ; movq %5,%%r8 ; " + "movq %6, %%r9; " __syscall "; movq %7, %%rbx ; " + "movq %%rax, (%%rbx)": + : "a" (STUB_MMAP_NR), "D" (STUB_DATA), + "S" (UM_KERN_PAGE_SIZE), + "d" (PROT_READ | PROT_WRITE), + "g" (MAP_FIXED | MAP_SHARED), "g" (fd), + "g" (offset), + "i" (&((struct stub_data *) STUB_DATA)->err) + : __syscall_clobber, "r10", "r8", "r9" ); +} + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/syscalls.h b/arch/um/sys-x86/shared/sysdep/syscalls.h new file mode 100644 index 000000000000..bd9a89b67e41 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/syscalls.h @@ -0,0 +1,5 @@ +#ifdef __i386__ +#include "syscalls_32.h" +#else +#include "syscalls_64.h" +#endif diff --git a/arch/um/sys-x86/shared/sysdep/syscalls_32.h b/arch/um/sys-x86/shared/sysdep/syscalls_32.h new file mode 100644 index 000000000000..05cb796aecb5 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/syscalls_32.h @@ -0,0 +1,20 @@ +/* + * Copyright (C) 2000 - 2008 Jeff Dike (jdike@{addtoit,linux.intel}.com) + * Licensed under the GPL + */ + +#include "asm/unistd.h" +#include "sysdep/ptrace.h" + +typedef long syscall_handler_t(struct pt_regs); + +/* Not declared on x86, incompatible declarations on x86_64, so these have + * to go here rather than in sys_call_table.c + */ +extern syscall_handler_t sys_rt_sigaction; + +extern syscall_handler_t *sys_call_table[]; + +#define EXECUTE_SYSCALL(syscall, regs) \ + ((long (*)(struct syscall_args)) \ + (*sys_call_table[syscall]))(SYSCALL_ARGS(®s->regs)) diff --git a/arch/um/sys-x86/shared/sysdep/syscalls_64.h b/arch/um/sys-x86/shared/sysdep/syscalls_64.h new file mode 100644 index 000000000000..8a7d5e1da98e --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/syscalls_64.h @@ -0,0 +1,32 @@ +/* + * Copyright 2003 PathScale, Inc. + * + * Licensed under the GPL + */ + +#ifndef __SYSDEP_X86_64_SYSCALLS_H__ +#define __SYSDEP_X86_64_SYSCALLS_H__ + +#include <linux/msg.h> +#include <linux/shm.h> + +typedef long syscall_handler_t(void); + +extern syscall_handler_t *sys_call_table[]; + +#define EXECUTE_SYSCALL(syscall, regs) \ + (((long (*)(long, long, long, long, long, long)) \ + (*sys_call_table[syscall]))(UPT_SYSCALL_ARG1(®s->regs), \ + UPT_SYSCALL_ARG2(®s->regs), \ + UPT_SYSCALL_ARG3(®s->regs), \ + UPT_SYSCALL_ARG4(®s->regs), \ + UPT_SYSCALL_ARG5(®s->regs), \ + UPT_SYSCALL_ARG6(®s->regs))) + +extern long old_mmap(unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff); +extern syscall_handler_t sys_modify_ldt; +extern syscall_handler_t sys_arch_prctl; + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/system.h b/arch/um/sys-x86/shared/sysdep/system.h new file mode 100644 index 000000000000..d1b93c436200 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/system.h @@ -0,0 +1,132 @@ +#ifndef _ASM_X86_SYSTEM_H_ +#define _ASM_X86_SYSTEM_H_ + +#include <asm/asm.h> +#include <asm/segment.h> +#include <asm/cpufeature.h> +#include <asm/cmpxchg.h> +#include <asm/nops.h> + +#include <linux/kernel.h> +#include <linux/irqflags.h> + +/* entries in ARCH_DLINFO: */ +#ifdef CONFIG_IA32_EMULATION +# define AT_VECTOR_SIZE_ARCH 2 +#else +# define AT_VECTOR_SIZE_ARCH 1 +#endif + +extern unsigned long arch_align_stack(unsigned long sp); + +void default_idle(void); + +/* + * Force strict CPU ordering. + * And yes, this is required on UP too when we're talking + * to devices. + */ +#ifdef CONFIG_X86_32 +/* + * Some non-Intel clones support out of order store. wmb() ceases to be a + * nop for these. + */ +#define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2) +#define rmb() alternative("lock; addl $0,0(%%esp)", "lfence", X86_FEATURE_XMM2) +#define wmb() alternative("lock; addl $0,0(%%esp)", "sfence", X86_FEATURE_XMM) +#else +#define mb() asm volatile("mfence":::"memory") +#define rmb() asm volatile("lfence":::"memory") +#define wmb() asm volatile("sfence" ::: "memory") +#endif + +/** + * read_barrier_depends - Flush all pending reads that subsequents reads + * depend on. + * + * No data-dependent reads from memory-like regions are ever reordered + * over this barrier. All reads preceding this primitive are guaranteed + * to access memory (but not necessarily other CPUs' caches) before any + * reads following this primitive that depend on the data return by + * any of the preceding reads. This primitive is much lighter weight than + * rmb() on most CPUs, and is never heavier weight than is + * rmb(). + * + * These ordering constraints are respected by both the local CPU + * and the compiler. + * + * Ordering is not guaranteed by anything other than these primitives, + * not even by data dependencies. See the documentation for + * memory_barrier() for examples and URLs to more information. + * + * For example, the following code would force ordering (the initial + * value of "a" is zero, "b" is one, and "p" is "&a"): + * + * <programlisting> + * CPU 0 CPU 1 + * + * b = 2; + * memory_barrier(); + * p = &b; q = p; + * read_barrier_depends(); + * d = *q; + * </programlisting> + * + * because the read of "*q" depends on the read of "p" and these + * two reads are separated by a read_barrier_depends(). However, + * the following code, with the same initial values for "a" and "b": + * + * <programlisting> + * CPU 0 CPU 1 + * + * a = 2; + * memory_barrier(); + * b = 3; y = b; + * read_barrier_depends(); + * x = a; + * </programlisting> + * + * does not enforce ordering, since there is no data dependency between + * the read of "a" and the read of "b". Therefore, on some CPUs, such + * as Alpha, "y" could be set to 3 and "x" to 0. Use rmb() + * in cases like this where there are no data dependencies. + **/ + +#define read_barrier_depends() do { } while (0) + +#ifdef CONFIG_SMP +#define smp_mb() mb() +#ifdef CONFIG_X86_PPRO_FENCE +# define smp_rmb() rmb() +#else +# define smp_rmb() barrier() +#endif +#ifdef CONFIG_X86_OOSTORE +# define smp_wmb() wmb() +#else +# define smp_wmb() barrier() +#endif +#define smp_read_barrier_depends() read_barrier_depends() +#define set_mb(var, value) do { (void)xchg(&var, value); } while (0) +#else +#define smp_mb() barrier() +#define smp_rmb() barrier() +#define smp_wmb() barrier() +#define smp_read_barrier_depends() do { } while (0) +#define set_mb(var, value) do { var = value; barrier(); } while (0) +#endif + +/* + * Stop RDTSC speculation. This is needed when you need to use RDTSC + * (or get_cycles or vread that possibly accesses the TSC) in a defined + * code region. + * + * (Could use an alternative three way for this if there was one.) + */ +static inline void rdtsc_barrier(void) +{ + alternative(ASM_NOP3, "mfence", X86_FEATURE_MFENCE_RDTSC); + alternative(ASM_NOP3, "lfence", X86_FEATURE_LFENCE_RDTSC); +} + +#endif diff --git a/arch/um/sys-x86/shared/sysdep/tls.h b/arch/um/sys-x86/shared/sysdep/tls.h new file mode 100644 index 000000000000..4d8f75262370 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/tls.h @@ -0,0 +1,5 @@ +#ifdef __i386__ +#include "tls_32.h" +#else +#include "tls_64.h" +#endif diff --git a/arch/um/sys-x86/shared/sysdep/tls_32.h b/arch/um/sys-x86/shared/sysdep/tls_32.h new file mode 100644 index 000000000000..34550755b2a1 --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/tls_32.h @@ -0,0 +1,32 @@ +#ifndef _SYSDEP_TLS_H +#define _SYSDEP_TLS_H + +# ifndef __KERNEL__ + +/* Change name to avoid conflicts with the original one from <asm/ldt.h>, which + * may be named user_desc (but in 2.4 and in header matching its API was named + * modify_ldt_ldt_s). */ + +typedef struct um_dup_user_desc { + unsigned int entry_number; + unsigned int base_addr; + unsigned int limit; + unsigned int seg_32bit:1; + unsigned int contents:2; + unsigned int read_exec_only:1; + unsigned int limit_in_pages:1; + unsigned int seg_not_present:1; + unsigned int useable:1; +} user_desc_t; + +# else /* __KERNEL__ */ + +# include <ldt.h> +typedef struct user_desc user_desc_t; + +# endif /* __KERNEL__ */ + +#define GDT_ENTRY_TLS_MIN_I386 6 +#define GDT_ENTRY_TLS_MIN_X86_64 12 + +#endif /* _SYSDEP_TLS_H */ diff --git a/arch/um/sys-x86/shared/sysdep/tls_64.h b/arch/um/sys-x86/shared/sysdep/tls_64.h new file mode 100644 index 000000000000..18c000d0357a --- /dev/null +++ b/arch/um/sys-x86/shared/sysdep/tls_64.h @@ -0,0 +1,29 @@ +#ifndef _SYSDEP_TLS_H +#define _SYSDEP_TLS_H + +# ifndef __KERNEL__ + +/* Change name to avoid conflicts with the original one from <asm/ldt.h>, which + * may be named user_desc (but in 2.4 and in header matching its API was named + * modify_ldt_ldt_s). */ + +typedef struct um_dup_user_desc { + unsigned int entry_number; + unsigned int base_addr; + unsigned int limit; + unsigned int seg_32bit:1; + unsigned int contents:2; + unsigned int read_exec_only:1; + unsigned int limit_in_pages:1; + unsigned int seg_not_present:1; + unsigned int useable:1; + unsigned int lm:1; +} user_desc_t; + +# else /* __KERNEL__ */ + +# include <ldt.h> +typedef struct user_desc user_desc_t; + +# endif /* __KERNEL__ */ +#endif /* _SYSDEP_TLS_H */ |