mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-05-17 02:35:17 +02:00
eac65dc9b8
This change adds some special cases to allow libunwind to compile for QNX. * QNX's copy of <elf.h> and <link.h> reside in sys/ instead. To deal with this, an AC_CHECK_HEADERS() was added to check for the files in both locations. * Similarly, QNX does not have <endian.h>. In cases where the file is not found, logic was added to refer to QNX-specific macros to determine endianness. * The QCC compiler, which is a wrapper around GCC, cannot handle some standard GCC options. Therefore, logic was added to check for QCC, and when it is found, to suppress the use of -lgcc, and to express the option -nostartfiles as -Wc,-nostartfiles instead, which is correctly passed on to the underlying GCC. * Finally, the support file os-qnx.c was added, patterned after the existing os-*.c files. Only local image lookup is currently supported (see the comments for more information), but this is sufficient for QNX, since ptrace is not supported there anyway, and that is the only case where the function is required to do remote image lookup. Change-Id: Ie7934f94a7317bdde59335f2acd4c3a97c0384c1
88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
/* libunwind - a platform-independent unwind library
|
|
Copyright (C) 2008 CodeSourcery
|
|
Copyright 2011 Linaro Limited
|
|
|
|
This file is part of libunwind.
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining
|
|
a copy of this software and associated documentation files (the
|
|
"Software"), to deal in the Software without restriction, including
|
|
without limitation the rights to use, copy, modify, merge, publish,
|
|
distribute, sublicense, and/or sell copies of the Software, and to
|
|
permit persons to whom the Software is furnished to do so, subject to
|
|
the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be
|
|
included in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
|
|
#include <stdio.h>
|
|
#include "unwind_i.h"
|
|
|
|
#ifdef __linux__
|
|
#define ARM_NR_sigreturn 119
|
|
#define ARM_NR_rt_sigreturn 173
|
|
#define ARM_NR_OABI_SYSCALL_BASE 0x900000
|
|
|
|
/* ARM EABI sigreturn (the syscall number is loaded into r7) */
|
|
#define MOV_R7_SIGRETURN (0xe3a07000UL | ARM_NR_sigreturn)
|
|
#define MOV_R7_RT_SIGRETURN (0xe3a07000UL | ARM_NR_rt_sigreturn)
|
|
|
|
/* ARM OABI sigreturn (using SWI) */
|
|
#define ARM_SIGRETURN \
|
|
(0xef000000UL | ARM_NR_sigreturn | ARM_NR_OABI_SYSCALL_BASE)
|
|
#define ARM_RT_SIGRETURN \
|
|
(0xef000000UL | ARM_NR_rt_sigreturn | ARM_NR_OABI_SYSCALL_BASE)
|
|
|
|
/* Thumb sigreturn (two insns, syscall number is loaded into r7) */
|
|
#define THUMB_SIGRETURN (0xdf00UL << 16 | 0x2700 | ARM_NR_sigreturn)
|
|
#define THUMB_RT_SIGRETURN (0xdf00UL << 16 | 0x2700 | ARM_NR_rt_sigreturn)
|
|
#endif /* __linux__ */
|
|
|
|
/* Returns 1 in case of a non-RT signal frame and 2 in case of a RT signal
|
|
frame. */
|
|
PROTECTED int
|
|
unw_is_signal_frame (unw_cursor_t *cursor)
|
|
{
|
|
#ifdef __linux__
|
|
struct cursor *c = (struct cursor *) cursor;
|
|
unw_word_t w0, ip;
|
|
unw_addr_space_t as;
|
|
unw_accessors_t *a;
|
|
void *arg;
|
|
int ret;
|
|
|
|
as = c->dwarf.as;
|
|
a = unw_get_accessors (as);
|
|
arg = c->dwarf.as_arg;
|
|
|
|
ip = c->dwarf.ip;
|
|
|
|
if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0)
|
|
return ret;
|
|
|
|
/* Return 1 if the IP points to a non-RT sigreturn sequence. */
|
|
if (w0 == MOV_R7_SIGRETURN || w0 == ARM_SIGRETURN || w0 == THUMB_SIGRETURN)
|
|
return 1;
|
|
/* Return 2 if the IP points to a RT sigreturn sequence. */
|
|
else if (w0 == MOV_R7_RT_SIGRETURN || w0 == ARM_RT_SIGRETURN
|
|
|| w0 == THUMB_RT_SIGRETURN)
|
|
return 2;
|
|
|
|
return 0;
|
|
#elif defined(__QNX__)
|
|
/* Not supported yet */
|
|
return 0;
|
|
#else
|
|
printf ("%s: implement me\n", __FUNCTION__);
|
|
return -UNW_ENOINFO;
|
|
#endif
|
|
}
|