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Fast tracepoints will only work on 6-byte intructions, and assume at least a z900 CPU. s390 also has 4-byte jump instructions, which also work on pre-z900, but their range is limitted to +-64kiB, which is not very useful (and wouldn't work at all with current jump pad allocation). There's a little problem with s390_relocate_instruction function: it converts BRAS/BRASL instructions to LARL of the return address + JG to the target address. On 31-bit, this sets the high bit of the target register to 0, while BRAS/BRASL would set it to 1. While this is not a problem when the result is only used to address memory, it could possibly break something that expects to compare such addresses for equality without first masking the bit off. In particular, I'm not sure whether leaving the return address high bit unset is ABI-compliant (could confuse some unwinder?). If that's a problem, it could be fixed by handling it in the jump pad (since at that point we can just modify the GPRs in the save area without having to worry about preserving CCs and only having that one GPR to work with - I'm not sure if it's even possible to set the high bit with such constraints). gdb/gdbserver/ChangeLog: PR 18377 * Makefile.in: Add s390 IPA files. * configure.srv: Build IPA for s390. * linux-s390-ipa.c: New file. * linux-s390-low.c: New includes - inttypes.h and linux-s390-tdesc.h. (init_registers_s390_linux32): Move declaration to linux-s390-tdesc.h. (tdesc_s390_linux32): Likewise. (init_registers_s390_linux32v1): Likewise. (tdesc_s390_linux32v1): Likewise. (init_registers_s390_linux32v2): Likewise. (tdesc_s390_linux32v2): Likewise. (init_registers_s390_linux64): Likewise. (tdesc_s390_linux64): Likewise. (init_registers_s390_linux64v1): Likewise. (tdesc_s390_linux64v1): Likewise. (init_registers_s390_linux64v2): Likewise. (tdesc_s390_linux64v2): Likewise. (init_registers_s390_te_linux64): Likewise. (tdesc_s390_te_linux64): Likewise. (init_registers_s390_vx_linux64): Likewise. (tdesc_s390_vx_linux64): Likewise. (init_registers_s390_tevx_linux64): Likewise. (tdesc_s390_tevx_linux64): Likewise. (init_registers_s390x_linux64): Likewise. (tdesc_s390x_linux64): Likewise. (init_registers_s390x_linux64v1): Likewise. (tdesc_s390x_linux64v1): Likewise. (init_registers_s390x_linux64v2): Likewise. (tdesc_s390x_linux64v2): Likewise. (init_registers_s390x_te_linux64): Likewise. (tdesc_s390x_te_linux64): Likewise. (init_registers_s390x_vx_linux64): Likewise. (tdesc_s390x_vx_linux64): Likewise. (init_registers_s390x_tevx_linux64): Likewise. (tdesc_s390x_tevx_linux64): Likewise. (have_hwcap_s390_vx): New static variable. (s390_arch_setup): Fill have_hwcap_s390_vx. (s390_get_thread_area): New function. (s390_ft_entry_gpr_esa): New const. (s390_ft_entry_gpr_zarch): New const. (s390_ft_entry_misc): New const. (s390_ft_entry_fr): New const. (s390_ft_entry_vr): New const. (s390_ft_main_31): New const. (s390_ft_main_64): New const. (s390_ft_exit_fr): New const. (s390_ft_exit_vr): New const. (s390_ft_exit_misc): New const. (s390_ft_exit_gpr_esa): New const. (s390_ft_exit_gpr_zarch): New const. (append_insns): New function. (s390_relocate_instruction): New function. (s390_install_fast_tracepoint_jump_pad): New function. (s390_get_min_fast_tracepoint_insn_len): New function. (s390_get_ipa_tdesc_idx): New function. (struct linux_target_ops): Wire in the above functions. (initialize_low_arch) [!__s390x__]: Don't initialize s390x tdescs. * linux-s390-tdesc.h: New file. |
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bfd | ||
binutils | ||
config | ||
cpu | ||
elfcpp | ||
etc | ||
gas | ||
gdb | ||
gold | ||
gprof | ||
include | ||
intl | ||
ld | ||
libdecnumber | ||
libiberty | ||
opcodes | ||
readline | ||
sim | ||
texinfo | ||
zlib | ||
.cvsignore | ||
.gitattributes | ||
.gitignore | ||
ChangeLog | ||
compile | ||
config-ml.in | ||
config.guess | ||
config.rpath | ||
config.sub | ||
configure | ||
configure.ac | ||
COPYING | ||
COPYING3 | ||
COPYING3.LIB | ||
COPYING.LIB | ||
COPYING.LIBGLOSS | ||
COPYING.NEWLIB | ||
depcomp | ||
djunpack.bat | ||
install-sh | ||
libtool.m4 | ||
lt~obsolete.m4 | ||
ltgcc.m4 | ||
ltmain.sh | ||
ltoptions.m4 | ||
ltsugar.m4 | ||
ltversion.m4 | ||
MAINTAINERS | ||
Makefile.def | ||
Makefile.in | ||
Makefile.tpl | ||
makefile.vms | ||
missing | ||
mkdep | ||
mkinstalldirs | ||
move-if-change | ||
README | ||
README-maintainer-mode | ||
setup.com | ||
src-release.sh | ||
symlink-tree | ||
ylwrap |
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.