diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-11-10 09:10:44 +0100 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-11-10 09:10:44 +0100 |
commit | a5a64498c194c82ecad3a2d67cff6231cda8d3dd (patch) | |
tree | 723d5d81419f9960b8d30ed9a2ece8a58d6c4328 /arch/um/sys-i386/shared/sysdep | |
parent | bb93d802ae5c1949977cc6da247b218240677f11 (diff) | |
parent | f7160c7573615ec82c691e294cf80d920b5d588d (diff) |
Merge commit 'v2.6.28-rc4' into timers/rtc
Conflicts:
drivers/rtc/rtc-cmos.c
Diffstat (limited to 'arch/um/sys-i386/shared/sysdep')
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/archsetjmp.h | 22 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/barrier.h | 9 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/checksum.h | 211 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/faultinfo.h | 29 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/host_ldt.h | 34 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/kernel-offsets.h | 21 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/ptrace.h | 170 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/ptrace_user.h | 50 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/sc.h | 44 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/sigcontext.h | 26 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/skas_ptrace.h | 22 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/stub.h | 101 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/syscalls.h | 26 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/system.h | 132 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/tls.h | 32 | ||||
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/vm-flags.h | 14 |
16 files changed, 943 insertions, 0 deletions
diff --git a/arch/um/sys-i386/shared/sysdep/archsetjmp.h b/arch/um/sys-i386/shared/sysdep/archsetjmp.h new file mode 100644 index 00000000000..0f312085ce1 --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/archsetjmp.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-i386/shared/sysdep/barrier.h b/arch/um/sys-i386/shared/sysdep/barrier.h new file mode 100644 index 00000000000..b58d52c5b2f --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/barrier.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-i386/shared/sysdep/checksum.h b/arch/um/sys-i386/shared/sysdep/checksum.h new file mode 100644 index 00000000000..0cb4645cbeb --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/checksum.h @@ -0,0 +1,211 @@ +/* + * Licensed under the GPL + */ + +#ifndef __UM_SYSDEP_CHECKSUM_H +#define __UM_SYSDEP_CHECKSUM_H + +#include "linux/in6.h" +#include "linux/string.h" + +/* + * computes the checksum of a memory block at buff, length len, + * and adds in "sum" (32-bit) + * + * returns a 32-bit number suitable for feeding into itself + * or csum_tcpudp_magic + * + * this function must be called with even lengths, except + * for the last fragment, which may be odd + * + * it's best to have buff aligned on a 32-bit boundary + */ +__wsum csum_partial(const void *buff, int len, __wsum sum); + +/* + * Note: when you get a NULL pointer exception here this means someone + * passed in an incorrect kernel address to one of these functions. + * + * If you use these functions directly please don't forget the + * access_ok(). + */ + +static __inline__ +__wsum csum_partial_copy_nocheck(const void *src, void *dst, + int len, __wsum sum) +{ + memcpy(dst, src, len); + return csum_partial(dst, len, sum); +} + +/* + * the same as csum_partial, but copies from src while it + * checksums, and handles user-space pointer exceptions correctly, when needed. + * + * here even more important to align src and dst on a 32-bit (or even + * better 64-bit) boundary + */ + +static __inline__ +__wsum csum_partial_copy_from_user(const void __user *src, void *dst, + int len, __wsum sum, int *err_ptr) +{ + if (copy_from_user(dst, src, len)) { + *err_ptr = -EFAULT; + return (__force __wsum)-1; + } + + return csum_partial(dst, len, sum); +} + +/* + * This is a version of ip_compute_csum() optimized for IP headers, + * which always checksum on 4 octet boundaries. + * + * By Jorge Cwik <jorge@laser.satlink.net>, adapted for linux by + * Arnt Gulbrandsen. + */ +static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl) +{ + unsigned int sum; + + __asm__ __volatile__( + "movl (%1), %0 ;\n" + "subl $4, %2 ;\n" + "jbe 2f ;\n" + "addl 4(%1), %0 ;\n" + "adcl 8(%1), %0 ;\n" + "adcl 12(%1), %0 ;\n" +"1: adcl 16(%1), %0 ;\n" + "lea 4(%1), %1 ;\n" + "decl %2 ;\n" + "jne 1b ;\n" + "adcl $0, %0 ;\n" + "movl %0, %2 ;\n" + "shrl $16, %0 ;\n" + "addw %w2, %w0 ;\n" + "adcl $0, %0 ;\n" + "notl %0 ;\n" +"2: ;\n" + /* Since the input registers which are loaded with iph and ipl + are modified, we must also specify them as outputs, or gcc + will assume they contain their original values. */ + : "=r" (sum), "=r" (iph), "=r" (ihl) + : "1" (iph), "2" (ihl) + : "memory"); + return (__force __sum16)sum; +} + +/* + * Fold a partial checksum + */ + +static inline __sum16 csum_fold(__wsum sum) +{ + __asm__( + "addl %1, %0 ;\n" + "adcl $0xffff, %0 ;\n" + : "=r" (sum) + : "r" ((__force u32)sum << 16), + "0" ((__force u32)sum & 0xffff0000) + ); + return (__force __sum16)(~(__force u32)sum >> 16); +} + +static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, + unsigned short len, + unsigned short proto, + __wsum sum) +{ + __asm__( + "addl %1, %0 ;\n" + "adcl %2, %0 ;\n" + "adcl %3, %0 ;\n" + "adcl $0, %0 ;\n" + : "=r" (sum) + : "g" (daddr), "g"(saddr), "g"((len + proto) << 8), "0"(sum)); + return sum; +} + +/* + * computes the checksum of the TCP/UDP pseudo-header + * returns a 16-bit checksum, already complemented + */ +static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, + unsigned short len, + unsigned short proto, + __wsum sum) +{ + return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum)); +} + +/* + * this routine is used for miscellaneous IP-like checksums, mainly + * in icmp.c + */ + +static inline __sum16 ip_compute_csum(const void *buff, int len) +{ + return csum_fold (csum_partial(buff, len, 0)); +} + +#define _HAVE_ARCH_IPV6_CSUM +static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr, + const struct in6_addr *daddr, + __u32 len, unsigned short proto, + __wsum sum) +{ + __asm__( + "addl 0(%1), %0 ;\n" + "adcl 4(%1), %0 ;\n" + "adcl 8(%1), %0 ;\n" + "adcl 12(%1), %0 ;\n" + "adcl 0(%2), %0 ;\n" + "adcl 4(%2), %0 ;\n" + "adcl 8(%2), %0 ;\n" + "adcl 12(%2), %0 ;\n" + "adcl %3, %0 ;\n" + "adcl %4, %0 ;\n" + "adcl $0, %0 ;\n" + : "=&r" (sum) + : "r" (saddr), "r" (daddr), + "r"(htonl(len)), "r"(htonl(proto)), "0"(sum)); + + return csum_fold(sum); +} + +/* + * Copy and checksum to user + */ +#define HAVE_CSUM_COPY_USER +static __inline__ __wsum csum_and_copy_to_user(const void *src, + void __user *dst, + int len, __wsum sum, int *err_ptr) +{ + if (access_ok(VERIFY_WRITE, dst, len)) { + if (copy_to_user(dst, src, len)) { + *err_ptr = -EFAULT; + return (__force __wsum)-1; + } + + return csum_partial(src, len, sum); + } + + if (len) + *err_ptr = -EFAULT; + + return (__force __wsum)-1; /* invalid checksum */ +} + +#endif + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local variables: + * c-file-style: "linux" + * End: + */ diff --git a/arch/um/sys-i386/shared/sysdep/faultinfo.h b/arch/um/sys-i386/shared/sysdep/faultinfo.h new file mode 100644 index 00000000000..db437cc373b --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/faultinfo.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-i386/shared/sysdep/host_ldt.h b/arch/um/sys-i386/shared/sysdep/host_ldt.h new file mode 100644 index 00000000000..0953cc4df65 --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/host_ldt.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-i386/shared/sysdep/kernel-offsets.h b/arch/um/sys-i386/shared/sysdep/kernel-offsets.h new file mode 100644 index 00000000000..5868526b5ee --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/kernel-offsets.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-i386/shared/sysdep/ptrace.h b/arch/um/sys-i386/shared/sysdep/ptrace.h new file mode 100644 index 00000000000..d50e62e0707 --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/ptrace.h @@ -0,0 +1,170 @@ +/* + * 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 "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; + +#include "skas_ptregs.h" + +#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]; + 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_REG(regs, reg) \ + ({ unsigned long val; \ + switch(reg){ \ + case EIP: val = UPT_IP(regs); break; \ + case UESP: val = UPT_SP(regs); break; \ + case EAX: val = UPT_EAX(regs); break; \ + case EBX: val = UPT_EBX(regs); break; \ + case ECX: val = UPT_ECX(regs); break; \ + case EDX: val = UPT_EDX(regs); break; \ + case ESI: val = UPT_ESI(regs); break; \ + case EDI: val = UPT_EDI(regs); break; \ + case EBP: val = UPT_EBP(regs); break; \ + case ORIG_EAX: val = UPT_ORIG_EAX(regs); break; \ + case CS: val = UPT_CS(regs); break; \ + case SS: val = UPT_SS(regs); break; \ + case DS: val = UPT_DS(regs); break; \ + case ES: val = UPT_ES(regs); break; \ + case FS: val = UPT_FS(regs); break; \ + case GS: val = UPT_GS(regs); break; \ + case EFL: val = UPT_EFLAGS(regs); break; \ + default : \ + panic("Bad register in UPT_REG : %d\n", reg); \ + val = -1; \ + } \ + val; \ + }) + +#define UPT_SET(regs, reg, val) \ + do { \ + switch(reg){ \ + case EIP: UPT_IP(regs) = val; break; \ + case UESP: UPT_SP(regs) = val; break; \ + case EAX: UPT_EAX(regs) = val; break; \ + case EBX: UPT_EBX(regs) = val; break; \ + case ECX: UPT_ECX(regs) = val; break; \ + case EDX: UPT_EDX(regs) = val; break; \ + case ESI: UPT_ESI(regs) = val; break; \ + case EDI: UPT_EDI(regs) = val; break; \ + case EBP: UPT_EBP(regs) = val; break; \ + case ORIG_EAX: UPT_ORIG_EAX(regs) = val; break; \ + case CS: UPT_CS(regs) = val; break; \ + case SS: UPT_SS(regs) = val; break; \ + case DS: UPT_DS(regs) = val; break; \ + case ES: UPT_ES(regs) = val; break; \ + case FS: UPT_FS(regs) = val; break; \ + case GS: UPT_GS(regs) = val; break; \ + case EFL: UPT_EFLAGS(regs) = val; break; \ + default : \ + panic("Bad register in UPT_SET : %d\n", reg); \ + break; \ + } \ + } while (0) + +#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-i386/shared/sysdep/ptrace_user.h b/arch/um/sys-i386/shared/sysdep/ptrace_user.h new file mode 100644 index 00000000000..ef56247e414 --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/ptrace_user.h @@ -0,0 +1,50 @@ +/* + * 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 "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_ARG1_OFFSET PT_OFFSET(EBX) +#define PT_SYSCALL_ARG2_OFFSET PT_OFFSET(ECX) +#define PT_SYSCALL_ARG3_OFFSET PT_OFFSET(EDX) +#define PT_SYSCALL_ARG4_OFFSET PT_OFFSET(ESI) +#define PT_SYSCALL_ARG5_OFFSET PT_OFFSET(EDI) +#define PT_SYSCALL_ARG6_OFFSET PT_OFFSET(EBP) + +#define PT_SYSCALL_RET_OFFSET PT_OFFSET(EAX) + +#define REGS_SYSCALL_NR EAX /* This is used before a system call */ +#define REGS_SYSCALL_ARG1 EBX +#define REGS_SYSCALL_ARG2 ECX +#define REGS_SYSCALL_ARG3 EDX +#define REGS_SYSCALL_ARG4 ESI +#define REGS_SYSCALL_ARG5 EDI +#define REGS_SYSCALL_ARG6 EBP + +#define REGS_IP_INDEX EIP +#define REGS_SP_INDEX UESP + +#define PT_IP_OFFSET PT_OFFSET(EIP) +#define PT_IP(regs) ((regs)[EIP]) +#define PT_SP_OFFSET PT_OFFSET(UESP) +#define PT_SP(regs) ((regs)[UESP]) + +#define FP_SIZE ((HOST_FPX_SIZE > HOST_FP_SIZE) ? HOST_FPX_SIZE : HOST_FP_SIZE) + +#ifndef FRAME_SIZE +#define FRAME_SIZE (17) +#endif + +#endif diff --git a/arch/um/sys-i386/shared/sysdep/sc.h b/arch/um/sys-i386/shared/sysdep/sc.h new file mode 100644 index 00000000000..c57d1780ad3 --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/sc.h @@ -0,0 +1,44 @@ +#ifndef __SYSDEP_I386_SC_H +#define __SYSDEP_I386_SC_H + +#include <user_constants.h> + +#define SC_OFFSET(sc, field) \ + *((unsigned long *) &(((char *) (sc))[HOST_##field])) +#define SC_FP_OFFSET(sc, field) \ + *((unsigned long *) &(((char *) (SC_FPSTATE(sc)))[HOST_##field])) +#define SC_FP_OFFSET_PTR(sc, field, type) \ + ((type *) &(((char *) (SC_FPSTATE(sc)))[HOST_##field])) + +#define SC_IP(sc) SC_OFFSET(sc, SC_IP) +#define SC_SP(sc) SC_OFFSET(sc, SC_SP) +#define SC_FS(sc) SC_OFFSET(sc, SC_FS) +#define SC_GS(sc) SC_OFFSET(sc, SC_GS) +#define SC_DS(sc) SC_OFFSET(sc, SC_DS) +#define SC_ES(sc) SC_OFFSET(sc, SC_ES) +#define SC_SS(sc) SC_OFFSET(sc, SC_SS) +#define SC_CS(sc) SC_OFFSET(sc, SC_CS) +#define SC_EFLAGS(sc) SC_OFFSET(sc, SC_EFLAGS) +#define SC_EAX(sc) SC_OFFSET(sc, SC_EAX) +#define SC_EBX(sc) SC_OFFSET(sc, SC_EBX) +#define SC_ECX(sc) SC_OFFSET(sc, SC_ECX) +#define SC_EDX(sc) SC_OFFSET(sc, SC_EDX) +#define SC_EDI(sc) SC_OFFSET(sc, SC_EDI) +#define SC_ESI(sc) SC_OFFSET(sc, SC_ESI) +#define SC_EBP(sc) SC_OFFSET(sc, SC_EBP) +#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 SC_FPSTATE(sc) SC_OFFSET(sc, SC_FPSTATE) +#define SC_SIGMASK(sc) SC_OFFSET(sc, SC_SIGMASK) +#define SC_FP_CW(sc) SC_FP_OFFSET(sc, SC_FP_CW) +#define SC_FP_SW(sc) SC_FP_OFFSET(sc, SC_FP_SW) +#define SC_FP_TAG(sc) SC_FP_OFFSET(sc, SC_FP_TAG) +#define SC_FP_IPOFF(sc) SC_FP_OFFSET(sc, SC_FP_IPOFF) +#define SC_FP_CSSEL(sc) SC_FP_OFFSET(sc, SC_FP_CSSEL) +#define SC_FP_DATAOFF(sc) SC_FP_OFFSET(sc, SC_FP_DATAOFF) +#define SC_FP_DATASEL(sc) SC_FP_OFFSET(sc, SC_FP_DATASEL) +#define SC_FP_ST(sc) SC_FP_OFFSET_PTR(sc, SC_FP_ST, struct _fpstate) +#define SC_FXSR_ENV(sc) SC_FP_OFFSET_PTR(sc, SC_FXSR_ENV, void) + +#endif diff --git a/arch/um/sys-i386/shared/sysdep/sigcontext.h b/arch/um/sys-i386/shared/sysdep/sigcontext.h new file mode 100644 index 00000000000..f583c87111a --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/sigcontext.h @@ -0,0 +1,26 @@ +/* + * 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 "sysdep/sc.h" + +#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) + +/* 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-i386/shared/sysdep/skas_ptrace.h b/arch/um/sys-i386/shared/sysdep/skas_ptrace.h new file mode 100644 index 00000000000..e27b8a79177 --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/skas_ptrace.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-i386/shared/sysdep/stub.h b/arch/um/sys-i386/shared/sysdep/stub.h new file mode 100644 index 00000000000..977dedd9221 --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/stub.h @@ -0,0 +1,101 @@ +/* + * 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" +#include "kern_constants.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-i386/shared/sysdep/syscalls.h b/arch/um/sys-i386/shared/sysdep/syscalls.h new file mode 100644 index 00000000000..905698197e3 --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/syscalls.h @@ -0,0 +1,26 @@ +/* + * 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 old_mmap_i386; + +extern syscall_handler_t *sys_call_table[]; + +#define EXECUTE_SYSCALL(syscall, regs) \ + ((long (*)(struct syscall_args)) \ + (*sys_call_table[syscall]))(SYSCALL_ARGS(®s->regs)) + +extern long sys_mmap2(unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff); diff --git a/arch/um/sys-i386/shared/sysdep/system.h b/arch/um/sys-i386/shared/sysdep/system.h new file mode 100644 index 00000000000..d1b93c43620 --- /dev/null +++ b/arch/um/sys-i386/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-i386/shared/sysdep/tls.h b/arch/um/sys-i386/shared/sysdep/tls.h new file mode 100644 index 00000000000..34550755b2a --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/tls.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-i386/shared/sysdep/vm-flags.h b/arch/um/sys-i386/shared/sysdep/vm-flags.h new file mode 100644 index 00000000000..e0d24c568db --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/vm-flags.h @@ -0,0 +1,14 @@ +/* + * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL + */ + +#ifndef __VM_FLAGS_I386_H +#define __VM_FLAGS_I386_H + +#define VM_DATA_DEFAULT_FLAGS \ + (VM_READ | VM_WRITE | \ + ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#endif |