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kernel_optimize_test/arch/ia64/ia32/ia32priv.h
Robin Holt bd1d6e2451 [IA64] Change SET_PERSONALITY to comply with comment in binfmt_elf.c. 
We have a customer application which trips a bug.  The problem arises
when a driver attempts to call do_munmap on an area which is mapped, but
because current->thread.task_size has been set to 0xC0000000, the call
to do_munmap fails thinking it is an unmap beyond the user's address
space.

The comment in fs/binfmt_elf.c in load_elf_library() before the call
to SET_PERSONALITY() indicates that task_size must not be changed for
the running application until flush_thread, but is for ia64 executing
ia32 binaries.

This patch moves the setting of task_size from SET_PERSONALITY() to
flush_thread() as indicated.  The customer application no longer is able
to trip the bug.

Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-12-06 09:12:34 -08:00

544 lines
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#ifndef _ASM_IA64_IA32_PRIV_H
#define _ASM_IA64_IA32_PRIV_H
#include <linux/config.h>
#include <asm/ia32.h>
#ifdef CONFIG_IA32_SUPPORT
#include <linux/binfmts.h>
#include <linux/compat.h>
#include <linux/rbtree.h>
#include <asm/processor.h>
/*
* 32 bit structures for IA32 support.
*/
#define IA32_PAGE_SIZE (1UL << IA32_PAGE_SHIFT)
#define IA32_PAGE_MASK (~(IA32_PAGE_SIZE - 1))
#define IA32_PAGE_ALIGN(addr) (((addr) + IA32_PAGE_SIZE - 1) & IA32_PAGE_MASK)
#define IA32_CLOCKS_PER_SEC 100 /* Cast in stone for IA32 Linux */
/*
* partially mapped pages provide precise accounting of which 4k sub pages
* are mapped and which ones are not, thereby improving IA-32 compatibility.
*/
struct partial_page {
struct partial_page *next; /* linked list, sorted by address */
struct rb_node pp_rb;
/* 64K is the largest "normal" page supported by ia64 ABI. So 4K*32
* should suffice.*/
unsigned int bitmap;
unsigned int base;
};
struct partial_page_list {
struct partial_page *pp_head; /* list head, points to the lowest
* addressed partial page */
struct rb_root ppl_rb;
struct partial_page *pp_hint; /* pp_hint->next is the last
* accessed partial page */
atomic_t pp_count; /* reference count */
};
#if PAGE_SHIFT > IA32_PAGE_SHIFT
struct partial_page_list* ia32_init_pp_list (void);
#else
# define ia32_init_pp_list() 0
#endif
/* sigcontext.h */
/*
* As documented in the iBCS2 standard..
*
* The first part of "struct _fpstate" is just the
* normal i387 hardware setup, the extra "status"
* word is used to save the coprocessor status word
* before entering the handler.
*/
struct _fpreg_ia32 {
unsigned short significand[4];
unsigned short exponent;
};
struct _fpxreg_ia32 {
unsigned short significand[4];
unsigned short exponent;
unsigned short padding[3];
};
struct _xmmreg_ia32 {
unsigned int element[4];
};
struct _fpstate_ia32 {
unsigned int cw,
sw,
tag,
ipoff,
cssel,
dataoff,
datasel;
struct _fpreg_ia32 _st[8];
unsigned short status;
unsigned short magic; /* 0xffff = regular FPU data only */
/* FXSR FPU environment */
unsigned int _fxsr_env[6]; /* FXSR FPU env is ignored */
unsigned int mxcsr;
unsigned int reserved;
struct _fpxreg_ia32 _fxsr_st[8]; /* FXSR FPU reg data is ignored */
struct _xmmreg_ia32 _xmm[8];
unsigned int padding[56];
};
struct sigcontext_ia32 {
unsigned short gs, __gsh;
unsigned short fs, __fsh;
unsigned short es, __esh;
unsigned short ds, __dsh;
unsigned int edi;
unsigned int esi;
unsigned int ebp;
unsigned int esp;
unsigned int ebx;
unsigned int edx;
unsigned int ecx;
unsigned int eax;
unsigned int trapno;
unsigned int err;
unsigned int eip;
unsigned short cs, __csh;
unsigned int eflags;
unsigned int esp_at_signal;
unsigned short ss, __ssh;
unsigned int fpstate; /* really (struct _fpstate_ia32 *) */
unsigned int oldmask;
unsigned int cr2;
};
/* user.h */
/*
* IA32 (Pentium III/4) FXSR, SSE support
*
* Provide support for the GDB 5.0+ PTRACE_{GET|SET}FPXREGS requests for
* interacting with the FXSR-format floating point environment. Floating
* point data can be accessed in the regular format in the usual manner,
* and both the standard and SIMD floating point data can be accessed via
* the new ptrace requests. In either case, changes to the FPU environment
* will be reflected in the task's state as expected.
*/
struct ia32_user_i387_struct {
int cwd;
int swd;
int twd;
int fip;
int fcs;
int foo;
int fos;
/* 8*10 bytes for each FP-reg = 80 bytes */
struct _fpreg_ia32 st_space[8];
};
struct ia32_user_fxsr_struct {
unsigned short cwd;
unsigned short swd;
unsigned short twd;
unsigned short fop;
int fip;
int fcs;
int foo;
int fos;
int mxcsr;
int reserved;
int st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
int xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
int padding[56];
};
/* signal.h */
#define IA32_SET_SA_HANDLER(ka,handler,restorer) \
((ka)->sa.sa_handler = (__sighandler_t) \
(((unsigned long)(restorer) << 32) \
| ((handler) & 0xffffffff)))
#define IA32_SA_HANDLER(ka) ((unsigned long) (ka)->sa.sa_handler & 0xffffffff)
#define IA32_SA_RESTORER(ka) ((unsigned long) (ka)->sa.sa_handler >> 32)
#define __IA32_NR_sigreturn 119
#define __IA32_NR_rt_sigreturn 173
struct sigaction32 {
unsigned int sa_handler; /* Really a pointer, but need to deal with 32 bits */
unsigned int sa_flags;
unsigned int sa_restorer; /* Another 32 bit pointer */
compat_sigset_t sa_mask; /* A 32 bit mask */
};
struct old_sigaction32 {
unsigned int sa_handler; /* Really a pointer, but need to deal
with 32 bits */
compat_old_sigset_t sa_mask; /* A 32 bit mask */
unsigned int sa_flags;
unsigned int sa_restorer; /* Another 32 bit pointer */
};
typedef struct sigaltstack_ia32 {
unsigned int ss_sp;
int ss_flags;
unsigned int ss_size;
} stack_ia32_t;
struct ucontext_ia32 {
unsigned int uc_flags;
unsigned int uc_link;
stack_ia32_t uc_stack;
struct sigcontext_ia32 uc_mcontext;
sigset_t uc_sigmask; /* mask last for extensibility */
};
struct stat64 {
unsigned long long st_dev;
unsigned char __pad0[4];
unsigned int __st_ino;
unsigned int st_mode;
unsigned int st_nlink;
unsigned int st_uid;
unsigned int st_gid;
unsigned long long st_rdev;
unsigned char __pad3[4];
unsigned int st_size_lo;
unsigned int st_size_hi;
unsigned int st_blksize;
unsigned int st_blocks; /* Number 512-byte blocks allocated. */
unsigned int __pad4; /* future possible st_blocks high bits */
unsigned int st_atime;
unsigned int st_atime_nsec;
unsigned int st_mtime;
unsigned int st_mtime_nsec;
unsigned int st_ctime;
unsigned int st_ctime_nsec;
unsigned int st_ino_lo;
unsigned int st_ino_hi;
};
typedef struct compat_siginfo {
int si_signo;
int si_errno;
int si_code;
union {
int _pad[((128/sizeof(int)) - 3)];
/* kill() */
struct {
unsigned int _pid; /* sender's pid */
unsigned int _uid; /* sender's uid */
} _kill;
/* POSIX.1b timers */
struct {
compat_timer_t _tid; /* timer id */
int _overrun; /* overrun count */
char _pad[sizeof(unsigned int) - sizeof(int)];
compat_sigval_t _sigval; /* same as below */
int _sys_private; /* not to be passed to user */
} _timer;
/* POSIX.1b signals */
struct {
unsigned int _pid; /* sender's pid */
unsigned int _uid; /* sender's uid */
compat_sigval_t _sigval;
} _rt;
/* SIGCHLD */
struct {
unsigned int _pid; /* which child */
unsigned int _uid; /* sender's uid */
int _status; /* exit code */
compat_clock_t _utime;
compat_clock_t _stime;
} _sigchld;
/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
struct {
unsigned int _addr; /* faulting insn/memory ref. */
} _sigfault;
/* SIGPOLL */
struct {
int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;
} _sifields;
} compat_siginfo_t;
struct old_linux32_dirent {
u32 d_ino;
u32 d_offset;
u16 d_namlen;
char d_name[1];
};
/*
* IA-32 ELF specific definitions for IA-64.
*/
#define _ASM_IA64_ELF_H /* Don't include elf.h */
#include <linux/sched.h>
#include <asm/processor.h>
/*
* This is used to ensure we don't load something for the wrong architecture.
*/
#define elf_check_arch(x) ((x)->e_machine == EM_386)
/*
* These are used to set parameters in the core dumps.
*/
#define ELF_CLASS ELFCLASS32
#define ELF_DATA ELFDATA2LSB
#define ELF_ARCH EM_386
#define IA32_STACK_TOP IA32_PAGE_OFFSET
#define IA32_GATE_OFFSET IA32_PAGE_OFFSET
#define IA32_GATE_END IA32_PAGE_OFFSET + PAGE_SIZE
/*
* The system segments (GDT, TSS, LDT) have to be mapped below 4GB so the IA-32 engine can
* access them.
*/
#define IA32_GDT_OFFSET (IA32_PAGE_OFFSET + PAGE_SIZE)
#define IA32_TSS_OFFSET (IA32_PAGE_OFFSET + 2*PAGE_SIZE)
#define IA32_LDT_OFFSET (IA32_PAGE_OFFSET + 3*PAGE_SIZE)
#define ELF_EXEC_PAGESIZE IA32_PAGE_SIZE
/*
* This is the location that an ET_DYN program is loaded if exec'ed.
* Typical use of this is to invoke "./ld.so someprog" to test out a
* new version of the loader. We need to make sure that it is out of
* the way of the program that it will "exec", and that there is
* sufficient room for the brk.
*/
#define ELF_ET_DYN_BASE (IA32_PAGE_OFFSET/3 + 0x1000000)
void ia64_elf32_init(struct pt_regs *regs);
#define ELF_PLAT_INIT(_r, load_addr) ia64_elf32_init(_r)
#define elf_addr_t u32
/* This macro yields a bitmask that programs can use to figure out
what instruction set this CPU supports. */
#define ELF_HWCAP 0
/* This macro yields a string that ld.so will use to load
implementation specific libraries for optimization. Not terribly
relevant until we have real hardware to play with... */
#define ELF_PLATFORM NULL
#ifdef __KERNEL__
# define SET_PERSONALITY(EX,IBCS2) \
(current->personality = (IBCS2) ? PER_SVR4 : PER_LINUX)
#endif
#define IA32_EFLAG 0x200
/*
* IA-32 ELF specific definitions for IA-64.
*/
#define __USER_CS 0x23
#define __USER_DS 0x2B
/*
* The per-cpu GDT has 32 entries: see <asm-i386/segment.h>
*/
#define GDT_ENTRIES 32
#define GDT_SIZE (GDT_ENTRIES * 8)
#define TSS_ENTRY 14
#define LDT_ENTRY (TSS_ENTRY + 1)
#define IA32_SEGSEL_RPL (0x3 << 0)
#define IA32_SEGSEL_TI (0x1 << 2)
#define IA32_SEGSEL_INDEX_SHIFT 3
#define _TSS ((unsigned long) TSS_ENTRY << IA32_SEGSEL_INDEX_SHIFT)
#define _LDT ((unsigned long) LDT_ENTRY << IA32_SEGSEL_INDEX_SHIFT)
#define IA32_SEG_BASE 16
#define IA32_SEG_TYPE 40
#define IA32_SEG_SYS 44
#define IA32_SEG_DPL 45
#define IA32_SEG_P 47
#define IA32_SEG_HIGH_LIMIT 48
#define IA32_SEG_AVL 52
#define IA32_SEG_DB 54
#define IA32_SEG_G 55
#define IA32_SEG_HIGH_BASE 56
#define IA32_SEG_DESCRIPTOR(base, limit, segtype, nonsysseg, dpl, segpresent, avl, segdb, gran) \
(((limit) & 0xffff) \
| (((unsigned long) (base) & 0xffffff) << IA32_SEG_BASE) \
| ((unsigned long) (segtype) << IA32_SEG_TYPE) \
| ((unsigned long) (nonsysseg) << IA32_SEG_SYS) \
| ((unsigned long) (dpl) << IA32_SEG_DPL) \
| ((unsigned long) (segpresent) << IA32_SEG_P) \
| ((((unsigned long) (limit) >> 16) & 0xf) << IA32_SEG_HIGH_LIMIT) \
| ((unsigned long) (avl) << IA32_SEG_AVL) \
| ((unsigned long) (segdb) << IA32_SEG_DB) \
| ((unsigned long) (gran) << IA32_SEG_G) \
| ((((unsigned long) (base) >> 24) & 0xff) << IA32_SEG_HIGH_BASE))
#define SEG_LIM 32
#define SEG_TYPE 52
#define SEG_SYS 56
#define SEG_DPL 57
#define SEG_P 59
#define SEG_AVL 60
#define SEG_DB 62
#define SEG_G 63
/* Unscramble an IA-32 segment descriptor into the IA-64 format. */
#define IA32_SEG_UNSCRAMBLE(sd) \
( (((sd) >> IA32_SEG_BASE) & 0xffffff) | ((((sd) >> IA32_SEG_HIGH_BASE) & 0xff) << 24) \
| ((((sd) & 0xffff) | ((((sd) >> IA32_SEG_HIGH_LIMIT) & 0xf) << 16)) << SEG_LIM) \
| ((((sd) >> IA32_SEG_TYPE) & 0xf) << SEG_TYPE) \
| ((((sd) >> IA32_SEG_SYS) & 0x1) << SEG_SYS) \
| ((((sd) >> IA32_SEG_DPL) & 0x3) << SEG_DPL) \
| ((((sd) >> IA32_SEG_P) & 0x1) << SEG_P) \
| ((((sd) >> IA32_SEG_AVL) & 0x1) << SEG_AVL) \
| ((((sd) >> IA32_SEG_DB) & 0x1) << SEG_DB) \
| ((((sd) >> IA32_SEG_G) & 0x1) << SEG_G))
#define IA32_IOBASE 0x2000000000000000UL /* Virtual address for I/O space */
#define IA32_CR0 0x80000001 /* Enable PG and PE bits */
#define IA32_CR4 0x600 /* MMXEX and FXSR on */
/*
* IA32 floating point control registers starting values
*/
#define IA32_FSR_DEFAULT 0x55550000 /* set all tag bits */
#define IA32_FCR_DEFAULT 0x17800000037fUL /* extended precision, all masks */
#define IA32_PTRACE_GETREGS 12
#define IA32_PTRACE_SETREGS 13
#define IA32_PTRACE_GETFPREGS 14
#define IA32_PTRACE_SETFPREGS 15
#define IA32_PTRACE_GETFPXREGS 18
#define IA32_PTRACE_SETFPXREGS 19
#define ia32_start_thread(regs,new_ip,new_sp) do { \
set_fs(USER_DS); \
ia64_psr(regs)->cpl = 3; /* set user mode */ \
ia64_psr(regs)->ri = 0; /* clear return slot number */ \
ia64_psr(regs)->is = 1; /* IA-32 instruction set */ \
regs->cr_iip = new_ip; \
regs->ar_rsc = 0xc; /* enforced lazy mode, priv. level 3 */ \
regs->ar_rnat = 0; \
regs->loadrs = 0; \
regs->r12 = new_sp; \
} while (0)
/*
* Local Descriptor Table (LDT) related declarations.
*/
#define IA32_LDT_ENTRIES 8192 /* Maximum number of LDT entries supported. */
#define IA32_LDT_ENTRY_SIZE 8 /* The size of each LDT entry. */
#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) | \
0x7100)
#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 )
static inline void
load_TLS (struct thread_struct *t, unsigned int cpu)
{
extern unsigned long *cpu_gdt_table[NR_CPUS];
memcpy(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN + 0, &t->tls_array[0], sizeof(long));
memcpy(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN + 1, &t->tls_array[1], sizeof(long));
memcpy(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN + 2, &t->tls_array[2], sizeof(long));
}
struct ia32_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;
};
struct linux_binprm;
extern void ia32_init_addr_space (struct pt_regs *regs);
extern int ia32_setup_arg_pages (struct linux_binprm *bprm, int exec_stack);
extern unsigned long ia32_do_mmap (struct file *, unsigned long, unsigned long, int, int, loff_t);
extern void ia32_load_segment_descriptors (struct task_struct *task);
#define ia32f2ia64f(dst,src) \
do { \
ia64_ldfe(6,src); \
ia64_stop(); \
ia64_stf_spill(dst, 6); \
} while(0)
#define ia64f2ia32f(dst,src) \
do { \
ia64_ldf_fill(6, src); \
ia64_stop(); \
ia64_stfe(dst, 6); \
} while(0)
struct user_regs_struct32 {
__u32 ebx, ecx, edx, esi, edi, ebp, eax;
unsigned short ds, __ds, es, __es;
unsigned short fs, __fs, gs, __gs;
__u32 orig_eax, eip;
unsigned short cs, __cs;
__u32 eflags, esp;
unsigned short ss, __ss;
};
/* Prototypes for use in elfcore32.h */
extern int save_ia32_fpstate (struct task_struct *, struct ia32_user_i387_struct __user *);
extern int save_ia32_fpxstate (struct task_struct *, struct ia32_user_fxsr_struct __user *);
#endif /* !CONFIG_IA32_SUPPORT */
#endif /* _ASM_IA64_IA32_PRIV_H */
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