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author | David Holsgrove <david.holsgrove@xilinx.com> | 2014-02-17 11:08:21 +1000 |
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committer | David Holsgrove <david.holsgrove@xilinx.com> | 2014-02-17 11:08:21 +1000 |
commit | ef114eafbff80525d079d7d6fadd69a58eb8dcc3 (patch) | |
tree | e643e00a609e9a6cda5ae90e2eb499cb992dd91b /sysdeps/microblaze/backtrace_linux.c | |
parent | ab7ac0f2cf8731fe4c3f3aea6088a7c0127b5725 (diff) | |
download | glibc-ef114eafbff80525d079d7d6fadd69a58eb8dcc3.zip glibc-ef114eafbff80525d079d7d6fadd69a58eb8dcc3.tar.gz glibc-ef114eafbff80525d079d7d6fadd69a58eb8dcc3.tar.bz2 |
[MicroBlaze]: Move MicroBlaze from ports to sysdeps.
2014-02-17 David Holsgrove <david.holsgrove@xilinx.com>
* sysdeps/microblaze: Move directory from ports/sysdeps/microblaze.
* sysdeps/unix/sysv/linux/microblaze: Move directory from
ports/sysdeps/unix/sysv/linux/microblaze.
* README: Add missing listing for microblaze*-*-linux-gnu.
Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
Diffstat (limited to 'sysdeps/microblaze/backtrace_linux.c')
-rw-r--r-- | sysdeps/microblaze/backtrace_linux.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/sysdeps/microblaze/backtrace_linux.c b/sysdeps/microblaze/backtrace_linux.c new file mode 100644 index 0000000..309d7ef --- /dev/null +++ b/sysdeps/microblaze/backtrace_linux.c @@ -0,0 +1,59 @@ +/* Copyright (C) 2005-2014 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <stddef.h> +#include <asm/sigcontext.h> +#include <linux/signal.h> +#include <asm-generic/ucontext.h> +#include <asm/unistd.h> + +int +_identify_sighandler (unsigned long fp, unsigned long pc, + unsigned long *pprev_fp, unsigned long *pprev_pc, + unsigned long *retaddr) +{ + unsigned long *tramp = 0; + struct ucontext *uc; + + if (*retaddr == 0) + { + /* Kernel inserts the tramp between the signal handler frame and the + caller frame in signal handling. */ + tramp = (unsigned long *) pc; + tramp += 2; + if ((*tramp == (0x31800000 | __NR_rt_sigreturn)) + && (*(tramp+1) == 0xb9cc0008)) + { + /* Signal handler function argument are: + int sig_num, siginfo_t * info, void * ucontext + therefore ucontext is the 3rd argument. */ + unsigned long ucptr = ((unsigned long) tramp + - sizeof (struct ucontext)); + uc = (struct ucontext *) ucptr; + *pprev_pc = uc->uc_mcontext.regs.pc; + /* Need to record the return address since the return address of the + function which causes this signal may not be recorded in the + stack. */ + *pprev_fp = uc->uc_mcontext.regs.r1; + *retaddr = uc->uc_mcontext.regs.r15; + /* It is a signal handler. */ + return 1; + } + } + return 0; +} |