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/* Standard argp argument parsers for tools using libdwfl.
Copyright (C) 2005 Red Hat, Inc.
This program is Open Source software; you can redistribute it and/or
modify it under the terms of the Open Software License version 1.0 as
published by the Open Source Initiative.
You should have received a copy of the Open Software License along
with this program; if not, you may obtain a copy of the Open Software
License version 1.0 from http://www.opensource.org/licenses/osl.php or
by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
3001 King Ranch Road, Ukiah, CA 95482. */
#include "libdwflP.h"
#include <argp.h>
#include <stdlib.h>
#include <assert.h>
#include <libintl.h>
/* gettext helper macros. */
#define _(Str) dgettext ("elfutils", Str)
#define OPT_DEBUGINFO 0x100
static const struct argp_option options[] =
{
{ NULL, 0, NULL, 0, N_("Input Selection:"), 0 },
{ "executable", 'e', "FILE", 0, N_("Find addresses in FILE"), 0 },
{ "pid", 'p', "PID", 0,
N_("Find addresses in files mapped into process PID"), 0 },
{ "kernel", 'k', NULL, 0, N_("Find addresses in the running kernel"), 0 },
{ "debuginfo-path", OPT_DEBUGINFO, "PATH", 0,
N_("Search path for separate debuginfo files"), 0 },
{ NULL, 0, NULL, 0, NULL, 0 }
};
static char *debuginfo_path;
static const Dwfl_Callbacks proc_callbacks =
{
.find_debuginfo = INTUSE(dwfl_standard_find_debuginfo),
.debuginfo_path = &debuginfo_path,
.find_elf = INTUSE(dwfl_linux_proc_find_elf),
};
static const Dwfl_Callbacks kernel_callbacks =
{
.find_debuginfo = INTUSE(dwfl_standard_find_debuginfo),
.debuginfo_path = &debuginfo_path,
.find_elf = INTUSE(dwfl_linux_kernel_find_elf),
.section_address = INTUSE(dwfl_linux_kernel_module_section_address),
};
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
inline void failure (int errnum, const char *msg)
{
if (errnum == -1)
argp_failure (state, EXIT_FAILURE, 0, "%s: %s",
msg, INTUSE(dwfl_errmsg) (-1));
else
argp_failure (state, EXIT_FAILURE, errnum, "%s", msg);
}
inline error_t fail (int errnum, const char *msg)
{
failure (errnum, msg);
return errnum == -1 ? EIO : errnum;
}
switch (key)
{
case OPT_DEBUGINFO:
debuginfo_path = arg;
break;
case 'e':
if (state->hook == NULL)
{
Dwfl *dwfl = INTUSE(dwfl_begin) (&proc_callbacks);
if (INTUSE(dwfl_report_elf) (dwfl, "", arg, -1, 0) == NULL)
return fail (-1, arg);
state->hook = dwfl;
}
else
{
toomany:
argp_error (state, "%s", _("only one -e, -p, or -k option allowed"));
return EINVAL;
}
break;
case 'p':
if (state->hook == NULL)
{
Dwfl *dwfl = INTUSE(dwfl_begin) (&proc_callbacks);
int result = INTUSE(dwfl_linux_proc_report) (dwfl, atoi (arg));
if (result != 0)
return fail (result, arg);
state->hook = dwfl;
}
else
goto toomany;
break;
case 'k':
if (state->hook == NULL)
{
Dwfl *dwfl = INTUSE(dwfl_begin) (&kernel_callbacks);
int result = INTUSE(dwfl_linux_kernel_report_kernel) (dwfl);
if (result != 0)
return fail (result, _("cannot load kernel symbols"));
result = INTUSE(dwfl_linux_kernel_report_modules) (dwfl);
if (result != 0)
/* Non-fatal to have no modules since we do have the kernel. */
failure (result, _("cannot find kernel modules"));
state->hook = dwfl;
}
else
goto toomany;
break;
case ARGP_KEY_SUCCESS:
{
Dwfl *dwfl = state->hook;
if (dwfl == NULL)
{
/* Default if no -e, -p, or -k, is "-e a.out". */
arg = "a.out";
dwfl = INTUSE(dwfl_begin) (&proc_callbacks);
if (INTUSE(dwfl_report_elf) (dwfl, "", arg, -1, 0) == NULL)
return fail (-1, arg);
state->hook = dwfl;
}
/* One of the three flavors has done dwfl_begin and some reporting
if we got here. Tie up the Dwfl and return it to the caller of
argp_parse. */
int result = INTUSE(dwfl_report_end) (dwfl, NULL, NULL);
assert (result == 0);
*(Dwfl **) state->input = dwfl;
}
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static const struct argp libdwfl_argp =
{ .options = options, .parser = parse_opt };
const struct argp *
dwfl_standard_argp (void)
{
return &libdwfl_argp;
}
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