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/*
* syscall defines and inlines
* Copyright (C) 2008-2009 Red Hat Inc.
*
* This file is part of systemtap, and is free software. You can
* redistribute it and/or modify it under the terms of the GNU General
* Public License (GPL); either version 2, or (at your option) any
* later version.
*/
#ifndef _SYSCALL_H_ /* -*- linux-c -*- */
#define _SYSCALL_H_
#if defined(__i386__) || defined(CONFIG_IA32_EMULATION)
#define __MMAP_SYSCALL_NO_IA32 90
#define __MMAP2_SYSCALL_NO_IA32 192
#define __MPROTECT_SYSCALL_NO_IA32 125
#define __MUNMAP_SYSCALL_NO_IA32 91
#define __MREMAP_SYSCALL_NO_IA32 163
# if !defined(CONFIG_IA32_EMULATION)
#define MMAP_SYSCALL_NO(tsk) __MMAP_SYSCALL_NO_IA32
#define MMAP2_SYSCALL_NO(tsk) __MMAP2_SYSCALL_NO_IA32
#define MPROTECT_SYSCALL_NO(tsk) __MPROTECT_SYSCALL_NO_IA32
#define MUNMAP_SYSCALL_NO(tsk) __MUNMAP_SYSCALL_NO_IA32
#define MREMAP_SYSCALL_NO(tsk) __MREMAP_SYSCALL_NO_IA32
# endif
#endif
#if defined(__x86_64__)
#define __MMAP_SYSCALL_NO_X86_64 9
/* x86_64 doesn't have a mmap2 system call. So, we'll use a number
* that doesn't map to a real system call. */
#define __MMAP2_SYSCALL_NO_X86_64 ((unsigned long)-1)
#define __MPROTECT_SYSCALL_NO_X86_64 10
#define __MUNMAP_SYSCALL_NO_X86_64 11
#define __MREMAP_SYSCALL_NO_X86_64 25
# if defined(CONFIG_IA32_EMULATION)
#define MMAP_SYSCALL_NO(tsk) ((test_tsk_thread_flag((tsk), TIF_IA32)) \
? __MMAP_SYSCALL_NO_IA32 \
: __MMAP_SYSCALL_NO_X86_64)
#define MMAP2_SYSCALL_NO(tsk) ((test_tsk_thread_flag((tsk), TIF_IA32)) \
? __MMAP2_SYSCALL_NO_IA32 \
: __MMAP2_SYSCALL_NO_X86_64)
#define MPROTECT_SYSCALL_NO(tsk) ((test_tsk_thread_flag((tsk), TIF_IA32)) \
? __MPROTECT_SYSCALL_NO_IA32 \
: __MPROTECT_SYSCALL_NO_X86_64)
#define MUNMAP_SYSCALL_NO(tsk) ((test_tsk_thread_flag((tsk), TIF_IA32)) \
? __MUNMAP_SYSCALL_NO_IA32 \
: __MUNMAP_SYSCALL_NO_X86_64)
#define MREMAP_SYSCALL_NO(tsk) ((test_tsk_thread_flag((tsk), TIF_IA32)) \
? __MREMAP_SYSCALL_NO_IA32 \
: __MREMAP_SYSCALL_NO_X86_64)
# else
#define MMAP_SYSCALL_NO(tsk) __MMAP_SYSCALL_NO_X86_64
#define MPROTECT_SYSCALL_NO(tsk) __MPROTECT_SYSCALL_NO_X86_64
#define MUNMAP_SYSCALL_NO(tsk) __MUNMAP_SYSCALL_NO_X86_64
#define MREMAP_SYSCALL_NO(tsk) __MREMAP_SYSCALL_NO_X86_64
# endif
#endif
#if defined(__powerpc__)
#define MMAP_SYSCALL_NO(tsk) 90
/* MMAP2 only exists on a 32-bit kernel. On a 64-bit kernel, we'll
* never see mmap2 (but that's OK). */
#define MMAP2_SYSCALL_NO(tsk) 192
#define MPROTECT_SYSCALL_NO(tsk) 125
#define MUNMAP_SYSCALL_NO(tsk) 91
#define MREMAP_SYSCALL_NO(tsk) 163
#endif
#if defined(__ia64__)
#define MMAP_SYSCALL_NO(tsk) 1151
#define MMAP2_SYSCALL_NO(tsk) 1172
#define MPROTECT_SYSCALL_NO(tsk) 1155
#define MUNMAP_SYSCALL_NO(tsk) 1152
#define MREMAP_SYSCALL_NO(tsk) 1156
#endif
#if defined(__s390__) || defined(__s390x__)
#define MMAP_SYSCALL_NO(tsk) 90
#define MMAP2_SYSCALL_NO(tsk) 192
#define MPROTECT_SYSCALL_NO(tsk) 125
#define MUNMAP_SYSCALL_NO(tsk) 91
#define MREMAP_SYSCALL_NO(tsk) 163
#endif
#if !defined(MMAP_SYSCALL_NO) || !defined(MMAP2_SYSCALL_NO) \
|| !defined(MPROTECT_SYSCALL_NO) || !defined(MUNMAP_SYSCALL_NO) \
|| !defined(MREMAP_SYSCALL_NO)
#error "Unimplemented architecture"
#endif
#ifdef STAPCONF_ASM_SYSCALL_H
/* If the system has asm/syscall.h, use defines from it. */
#include <asm/syscall.h>
#else /* !STAPCONF_ASM_SYSCALL_H */
/* If the system doesn't have asm/syscall.h, use our defines. */
#if defined(__i386__) || defined(__x86_64__)
static inline long
syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
{
#if defined(STAPCONF_X86_UNIREGS)
return regs->orig_ax;
#elif defined(__x86_64__)
return regs->orig_rax;
#elif defined (__i386__)
return regs->orig_eax;
#endif
}
#endif
#if defined(__powerpc__)
static inline long
syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
{
return regs->gpr[0];
}
#endif
#if defined(__ia64__)
static inline long
syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
{
return regs->r15;
}
#endif
#if defined(__s390__) || defined(__s390x__)
static inline long
syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
{
// might need to be 'orig_gpr2'
return regs->gprs[2];
}
#endif
#if defined(__i386__) || defined(__x86_64__)
static inline long
syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
{
#ifdef CONFIG_IA32_EMULATION
// This code works, but isn't what we need. Since
// syscall_get_syscall_arg() doesn't sign-extend, a value passed in as
// an argument and then returned won't compare correctly anymore. So,
// for now, disable this code.
# if 0
if (test_tsk_thread_flag(task, TIF_IA32))
// Sign-extend the value so (int)-EFOO becomes (long)-EFOO
// and will match correctly in comparisons.
regs->ax = (long) (int) regs->ax;
# endif
#endif
#if defined(STAPCONF_X86_UNIREGS)
return regs->ax;
#elif defined(__x86_64__)
return regs->rax;
#elif defined (__i386__)
return regs->eax;
#endif
}
#endif
#if defined(__powerpc__)
static inline long
syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
{
return regs->gpr[3];
}
#endif
#if defined(__ia64__)
static inline long
syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
{
return regs->r8;
}
#endif
#if defined(__s390__) || defined(__s390x__)
static inline long
syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
{
return regs->gprs[2];
}
#endif
#if defined(__i386__) || defined(__x86_64__)
static inline void
syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
unsigned int i, unsigned int n, unsigned long *args)
{
if (i + n > 6) {
_stp_error("invalid syscall arg request");
return;
}
#if defined(__i386__)
#if defined(STAPCONF_X86_UNIREGS)
memcpy(args, ®s->bx + i, n * sizeof(args[0]));
#else
memcpy(args, ®s->ebx + i, n * sizeof(args[0]));
#endif
#elif defined(__x86_64__)
#ifdef CONFIG_IA32_EMULATION
if (test_tsk_thread_flag(task, TIF_IA32)) {
switch (i) {
#if defined(STAPCONF_X86_UNIREGS)
case 0:
if (!n--) break;
*args++ = regs->bx;
case 1:
if (!n--) break;
*args++ = regs->cx;
case 2:
if (!n--) break;
*args++ = regs->dx;
case 3:
if (!n--) break;
*args++ = regs->si;
case 4:
if (!n--) break;
*args++ = regs->di;
case 5:
if (!n--) break;
*args++ = regs->bp;
#else
case 0:
if (!n--) break;
*args++ = regs->rbx;
case 1:
if (!n--) break;
*args++ = regs->rcx;
case 2:
if (!n--) break;
*args++ = regs->rdx;
case 3:
if (!n--) break;
*args++ = regs->rsi;
case 4:
if (!n--) break;
*args++ = regs->rdi;
case 5:
if (!n--) break;
*args++ = regs->rbp;
#endif
}
return;
}
#endif /* CONFIG_IA32_EMULATION */
switch (i) {
#if defined(STAPCONF_X86_UNIREGS)
case 0:
if (!n--) break;
*args++ = regs->di;
case 1:
if (!n--) break;
*args++ = regs->si;
case 2:
if (!n--) break;
*args++ = regs->dx;
case 3:
if (!n--) break;
*args++ = regs->r10;
case 4:
if (!n--) break;
*args++ = regs->r8;
case 5:
if (!n--) break;
*args++ = regs->r9;
#else
case 0:
if (!n--) break;
*args++ = regs->rdi;
case 1:
if (!n--) break;
*args++ = regs->rsi;
case 2:
if (!n--) break;
*args++ = regs->rdx;
case 3:
if (!n--) break;
*args++ = regs->r10;
case 4:
if (!n--) break;
*args++ = regs->r8;
case 5:
if (!n--) break;
*args++ = regs->r9;
#endif
}
#endif /* CONFIG_X86_32 */
return;
}
#endif
#if defined(__powerpc__)
static inline void
syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
unsigned int i, unsigned int n, unsigned long *args)
{
if (i + n > 6) {
_stp_error("invalid syscall arg request");
return;
}
memcpy(args, ®s->gpr[3 + i], n * sizeof(args[0]));
}
#endif
#if defined(__ia64__)
#define syscall_get_arguments(task, regs, i, n, args) \
__ia64_syscall_get_arguments(task, regs, i, n, args, &c->unwaddr)
static inline void
__ia64_syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
unsigned int i, unsigned int n,
unsigned long *args, unsigned long **cache)
{
if (i + n > 6) {
_stp_error("invalid syscall arg request");
return;
}
switch (i) {
case 0:
if (!n--) break;
*args++ = *__ia64_fetch_register(i + 32, regs, cache);
case 1:
if (!n--) break;
*args++ = *__ia64_fetch_register(i + 33, regs, cache);
case 2:
if (!n--) break;
*args++ = *__ia64_fetch_register(i + 34, regs, cache);
case 3:
if (!n--) break;
*args++ = *__ia64_fetch_register(i + 35, regs, cache);
case 4:
if (!n--) break;
*args++ = *__ia64_fetch_register(i + 36, regs, cache);
case 5:
if (!n--) break;
*args++ = *__ia64_fetch_register(i + 37, regs, cache);
}
}
#endif
#if defined(__s390__) || defined(__s390x__)
static inline void
syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
unsigned int i, unsigned int n, unsigned long *args)
{
unsigned long mask = -1UL;
if (i + n > 6) {
_stp_error("invalid syscall arg request");
return;
}
#ifdef CONFIG_COMPAT
if (test_tsk_thread_flag(task, TIF_31BIT))
mask = 0xffffffff;
#endif
switch (i) {
case 0:
if (!n--) break;
*args++ = regs->orig_gpr2 & mask;
case 1:
if (!n--) break;
*args++ = regs->gprs[3] & mask;
case 2:
if (!n--) break;
*args++ = regs->gprs[4] & mask;
case 3:
if (!n--) break;
*args++ = regs->gprs[5] & mask;
case 4:
if (!n--) break;
*args++ = regs->gprs[6] & mask;
case 5:
if (!n--) break;
*args++ = regs->args[0] & mask;
}
}
#endif
#endif /* !STAPCONF_ASM_SYSCALL_H */
#endif /* _SYSCALL_H_ */
|
