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Name	Size	Permission
dyninst	[ DIR ]	drwxr-xr-x
linux	[ DIR ]	drwxr-xr-x
transport	[ DIR ]	drwxr-xr-x
unwind	[ DIR ]	drwxr-xr-x
addr-map.c	523 B	-rw-r--r--
addr-map.h	723 B	-rw-r--r--
alloc.c	498 B	-rw-r--r--
arith.c	483 B	-rw-r--r--
common_probe_context.h	6.08 KB	-rw-r--r--
common_session_state.h	415 B	-rw-r--r--
compatdefs.h	3.02 KB	-rw-r--r--
copy.c	585 B	-rw-r--r--
debug.h	485 B	-rw-r--r--
io.c	508 B	-rw-r--r--
k_syms.h	182 B	-rw-r--r--
loc2c-runtime.h	8.96 KB	-rw-r--r--
map-gen.c	25.29 KB	-rw-r--r--
map-stat.c	3.38 KB	-rw-r--r--
map.c	14.1 KB	-rw-r--r--
map.h	5.78 KB	-rw-r--r--
mempool.c	2.58 KB	-rw-r--r--
namespaces.h	487 B	-rw-r--r--
pmap-gen.c	8.17 KB	-rw-r--r--
print.c	486 B	-rw-r--r--
print.h	680 B	-rw-r--r--
print_flush.c	4.29 KB	-rw-r--r--
probe_lock.h	498 B	-rw-r--r--
proc_fs_compatibility.h	2.22 KB	-rw-r--r--
procfs-probes.c	4.21 KB	-rw-r--r--
procfs-probes.h	674 B	-rw-r--r--
procfs.c	7.3 KB	-rw-r--r--
ptrace_compatibility.h	1.48 KB	-rw-r--r--
regs.c	4.18 KB	-rw-r--r--
regs.h	2.12 KB	-rw-r--r--
runtime.h	928 B	-rw-r--r--
runtime_context.h	669 B	-rw-r--r--
runtime_defines.h	3.5 KB	-rw-r--r--
stack-arm.c	1.65 KB	-rw-r--r--
stack-ia64.c	1.06 KB	-rw-r--r--
stack-mips.c	125 B	-rw-r--r--
stack-s390.c	2.25 KB	-rw-r--r--
stack.c	18.79 KB	-rw-r--r--
stat-common.c	8.29 KB	-rw-r--r--
stat.c	7.25 KB	-rw-r--r--
stat.h	1.92 KB	-rw-r--r--
stp_helper_lock.h	2.98 KB	-rw-r--r--
stp_string.c	8.15 KB	-rw-r--r--
stp_string.h	598 B	-rw-r--r--
stp_task_work.c	2.75 KB	-rw-r--r--
stp_utrace.c	94.13 KB	-rw-r--r--
stp_utrace.h	13.68 KB	-rw-r--r--
sym.c	34.44 KB	-rw-r--r--
sym.h	5.83 KB	-rw-r--r--
syscall.h	15.61 KB	-rw-r--r--
task_finder_vma.c	12.81 KB	-rw-r--r--
time.c	13.31 KB	-rw-r--r--
timer.c	481 B	-rw-r--r--
timer.h	482 B	-rw-r--r--
uidgid_compatibility.h	603 B	-rw-r--r--
unwind.c	46.51 KB	-rw-r--r--
utrace_compatibility.h	3.07 KB	-rw-r--r--
vma.c	8.83 KB	-rw-r--r--
vsprintf.c	22.98 KB	-rw-r--r--
vsprintf.h	1.47 KB	-rw-r--r--

Code Editor : regs.c

/* -*- linux-c -*- 
 * Functions to access the members of pt_regs struct
 * Copyright (C) 2005, 2007 Red Hat Inc.
 * Copyright (C) 2005 Intel Corporation.
 * Copyright (C) 2007 Quentin Barnes.
 *
 * 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 _REGS_C_
#define _REGS_C_

#include "regs.h"

#if defined(__KERNEL__)

#include "linux/regs.c"

#elif defined(__DYNINST__)

#include "dyninst/regs.c"

#endif

/* Function arguments */

#define _STP_REGPARM 0x8000
#define _STP_REGPARM_MASK ((_STP_REGPARM) - 1)

/*
 * x86_64 and i386 are especially ugly because:
 * 1)  the pt_reg member names changed as part of the x86 merge.  We use
 * either the pre-merge name or the post-merge name, as needed.
 * 2) -m32 apps on x86_64 look like i386 apps, so we need to support
 * those semantics on both i386 and x86_64.
 */

#ifdef __i386__

static long _stp_get_sp(struct pt_regs *regs)
{
	if (!user_mode(regs))
		return (long) &EREG(sp, regs);
	return EREG(sp, regs);
}

#endif	/* __i386__ */

#ifdef __x86_64__

static long _stp_get_sp(struct pt_regs *regs)
{
	return RREG(sp, regs);
}

#endif	/* __x86_64__ */

#if defined(__x86_64__) || defined(__ia64__) || defined(__i386__)

/* Ensure that the upper 32 bits of val are a sign-extension of the lower 32. */
static int64_t __stp_sign_extend32(int64_t val)
{
	int32_t *val_ptr32 = (int32_t*) &val;
	return *val_ptr32;
}

/* Ensure that the upper 48 bits of val are a sign-extension of the lower 16. */
static int64_t __stp_sign_extend16(int64_t val)
{
	int16_t *val_ptr16 = (int16_t*) &val;
	return *val_ptr16;
}

/* Ensure that the upper 56 bits of val are a sign-extension of the lower 8. */
static int64_t __stp_sign_extend8(int64_t val)
{
	int8_t *val_ptr8 = (int8_t*) &val;
	return *val_ptr8;
}

#endif	/* __x86_64__ || __ia64__ || __i386__ */

#if defined(__i386__) || defined(__x86_64__)
/*
 * Use this for i386 kernel and apps, and for 32-bit apps running on x86_64.
 * Does arch-specific work for fetching function arg #argnum (1 = first arg).
 * nr_regargs is the number of arguments that reside in registers (e.g.,
 * 3 for fastcall functions).
 * Returns:
 * 0 if the arg resides in a register.  *val contains its value.
 * 1 if the arg resides on the kernel stack.  *val contains its address.
 * 2 if the arg resides on the user stack.  *val contains its address.
 * -1 if the arg number is invalid.
 * We assume that the regs pointer is valid.
 */

#if defined(__i386__)
#define ERREG(nm, regs) EREG(nm, regs)
#else  /* x86_64 */
#define ERREG(nm, regs) RREG(nm, regs)
#endif

static int _stp_get_arg32_by_number(int n, int nr_regargs,
					struct pt_regs *regs, long *val)
{
	if (nr_regargs < 0)
		return -1;
	if (n > nr_regargs) {
		/*
		 * The typical case: arg n is on the stack.
		 * stack[0] = return address
		 */
		int stack_index = n - nr_regargs;
		int32_t *stack = (int32_t*) _stp_get_sp(regs);
		*val = (long) &stack[stack_index];
		return (user_mode(regs) ? 2 : 1);
	} else {
		switch (n) {
		case 1: *val = (int32_t)(ERREG(ax, regs)); break;
		case 2: *val = (int32_t)(ERREG(dx, regs)); break;
		case 3: *val = (int32_t)(ERREG(cx, regs)); break;
		default:
			/* gcc rejects regparm values > 3. */
			return -1;
		}
		return 0;
	}
}
#endif	/* __i386__ || __x86_64__ */

#ifdef __x86_64__
/* See _stp_get_arg32_by_number(). */
static int _stp_get_arg64_by_number(int n, int nr_regargs,
				struct pt_regs *regs, unsigned long *val)
{
	if (nr_regargs < 0)
		return -1;
	if (n > nr_regargs) {
		/* arg n is on the stack.  stack[0] = return address */
		int stack_index = n - nr_regargs;
		unsigned long *stack = (unsigned long*) _stp_get_sp(regs);
		*val = (unsigned long) &stack[stack_index];
		return (user_mode(regs) ? 2 : 1);
	} else {
		switch (n) {
		case 1: *val = RREG(di, regs); break;
		case 2: *val = RREG(si, regs); break;
		case 3: *val = RREG(dx, regs); break;
		case 4: *val = RREG(cx, regs); break;
		case 5: *val = regs->r8; break;
		case 6: *val = regs->r9; break;
		default:
			/* gcc rejects regparm values > 6. */
			return -1;
		}
		return 0;
	}
}
#endif	/* __x86_64__ */

/** @} */
#endif /* _REGS_C_ */

${this.title}

Code Editor : regs.c