aboutsummaryrefslogtreecommitdiff
path: root/gdb/testsuite/gdb.base/step-bt.c
AgeCommit message (Collapse)AuthorFilesLines
2017-01-01update copyright year range in GDB filesJoel Brobecker1-1/+1
This applies the second part of GDB's End of Year Procedure, which updates the copyright year range in all of GDB's files. gdb/ChangeLog: Update copyright year range in all GDB files.
2016-01-01GDB copyright headers update after running GDB's copyright.py script.Joel Brobecker1-1/+1
gdb/ChangeLog: Update year range in copyright notice of all files.
2015-01-01Update year range in copyright notice of all files owned by the GDB project.Joel Brobecker1-1/+1
gdb/ChangeLog: Update year range in copyright notice of all files.
2014-02-04PowerPC64 ELFv2 ABI: skip global entry point codeUlrich Weigand1-1/+10
This patch handles another aspect of the ELFv2 ABI, which unfortunately requires common code changes. In ELFv2, functions may provide both a global and a local entry point. The global entry point (where the function symbol points to) is intended to be used for function-pointer or cross-module (PLT) calls, and requires r12 to be set up to the entry point address itself. The local entry point (which is found at a fixed offset after the global entry point, as defined by bits in the symbol table entries' st_other field), instead expects r2 to be set up to the current TOC. Now, when setting a breakpoint on a function by name, you really want that breakpoint to trigger either way, no matter whether the function is called via its local or global entry point. Since the global entry point will always fall through into the local entry point, the way to achieve that is to simply set the breakpoint at the local entry point. One way to do that would be to have prologue parsing skip the code sequence that makes up the global entry point. Unfortunately, this does not work reliably, since -for optimized code- GDB these days will not actuall invoke the prologue parsing code but instead just set the breakpoint at the symbol address and rely on DWARF being correct at any point throughout the function ... Unfortunately, I don't really see any way to express the notion of local entry points with the current set of gdbarch callbacks. Thus this patch adds a new callback, skip_entrypoint, that is somewhat analogous to skip_prologue, but is called every time GDB needs to determine a function start address, even in those cases where GDB decides to not call skip_prologue. As a side effect, the skip_entrypoint implementation on ppc64 does not need to perform any instruction parsing; it can simply rely on the local entry point flags in the symbol table entry. With this implemented, two test cases would still fail to set the breakpoint correctly, but that's because they use the construct: gdb_test "break *hello" Now, using "*hello" explicitly instructs GDB to set the breakpoint at the numerical value of "hello" treated as function pointer, so it will by definition only hit the global entry point. I think this behaviour is unavoidable, but acceptable -- most people do not use this construct, and if they do, they get what they asked for ... In one of those two test cases, use of this construct is really not appropriate. I think this was added way back when as a means to work around prologue skipping problems on some platforms. These days that shouldn't really be necessary any more ... For the other (step-bt), we really want to make sure backtracing works on the very first instruction of the routine. To enable that test also on powerpc64le-linux, we can modify the code to call the test function via function pointer (which makes it use the global entry point in the ELFv2 ABI). gdb/ChangeLog: * gdbarch.sh (skip_entrypoint): New callback. * gdbarch.c, gdbarch.h: Regenerate. * symtab.c (skip_prologue_sal): Call gdbarch_skip_entrypoint. * infrun.c (fill_in_stop_func): Likewise. * ppc-linux-tdep.c: Include "elf/ppc64.h". (ppc_elfv2_elf_make_msymbol_special): New function. (ppc_elfv2_skip_entrypoint): Likewise. (ppc_linux_init_abi): Install them for ELFv2. gdb/testsuite/ChangeLog: * gdb.base/sigbpt.exp: Do not use "*" when setting breakpoint on a function. * gdb.base/step-bt.c: Call hello via function pointer to make sure its first instruction is executed on powerpc64le-linux.
2014-01-01Update Copyright year range in all files maintained by GDB.Joel Brobecker1-1/+1
2013-01-01Update years in copyright notice for the GDB files.Joel Brobecker1-1/+1
Two modifications: 1. The addition of 2013 to the copyright year range for every file; 2. The use of a single year range, instead of potentially multiple year ranges, as approved by the FSF.
2012-01-04Copyright year update in most files of the GDB Project.Joel Brobecker1-1/+1
gdb/ChangeLog: Copyright year update in most files of the GDB Project.
2011-01-01run copyright.sh for 2011.Joel Brobecker1-1/+1
2010-01-01Update copyright year in most headers.Joel Brobecker1-1/+1
Automatic update by copyright.sh.
2009-01-03 Updated copyright notices for most files.Joel Brobecker1-1/+1
2008-08-06 Fix for PR gdb/1543.Jan Kratochvil1-4/+1
* gdb.base/sep.exp: `sep-proc.c' absolute line numbers replaced with $LOCATION. (location): New variable. * config/cfdbug.exp, config/d10v.exp, config/dve.exp, config/i960.exp, config/m32r.exp, config/mn10300-eval.exp, config/proelf.exp, config/rom68k.exp, config/sh.exp, config/unix.exp, config/vr4300.exp, config/vr5000.exp, config/vxworks.exp, gdb.arch/altivec-regs.exp, gdb.arch/e500-abi.exp, gdb.arch/e500-regs.exp, gdb.asm/asm-source.exp, gdb.base/a2-run.exp, gdb.base/advance.exp, gdb.base/all-bin.exp, gdb.base/args.exp, gdb.base/arithmet.exp, gdb.base/assign.exp, gdb.base/async.exp, gdb.base/auxv.exp, gdb.base/bigcore.c, gdb.base/bigcore.exp, gdb.base/bitfields.exp, gdb.base/bitops.exp, gdb.base/break.c, gdb.base/break.exp, gdb.base/break1.c, gdb.base/call-ar-st.exp, gdb.base/call-rt-st.exp, gdb.base/call-strs.exp, gdb.base/callfuncs.c, gdb.base/callfuncs.exp, gdb.base/checkpoint.exp, gdb.base/chng-syms.exp, gdb.base/code-expr.exp, gdb.base/commands.exp, gdb.base/completion.exp, gdb.base/complex.exp, gdb.base/cond-expr.exp, gdb.base/condbreak.exp, gdb.base/consecutive.exp, gdb.base/corefile.exp, gdb.base/cvexpr.c, gdb.base/cvexpr.exp, gdb.base/dbx.exp, gdb.base/default.exp, gdb.base/define.exp, gdb.base/del.c, gdb.base/detach.exp, gdb.base/display.exp, gdb.base/dump.exp, gdb.base/echo.exp, gdb.base/environ.exp, gdb.base/eval-skip.exp, gdb.base/exprs.exp, gdb.base/fileio.exp, gdb.base/find.exp, gdb.base/finish.exp, gdb.base/funcargs.exp, gdb.base/gcore-buffer-overflow.exp, gdb.base/gcore.exp, gdb.base/gdb1555.exp, gdb.base/gdbvars.exp, gdb.base/help.exp, gdb.base/huge.exp, gdb.base/info-proc.exp, gdb.base/interrupt.exp, gdb.base/jump.exp, gdb.base/langs.exp, gdb.base/lineinc.exp, gdb.base/list.exp, gdb.base/macscp.exp, gdb.base/maint.exp, gdb.base/mips_pro.exp, gdb.base/miscexprs.exp, gdb.base/nodebug.exp, gdb.base/nofield.c, gdb.base/opaque.exp, gdb.base/overlays.exp, gdb.base/page.exp, gdb.base/pc-fp.exp, gdb.base/pending.c, gdb.base/pendshr.c, gdb.base/pointers.exp, gdb.base/psymtab.exp, gdb.base/ptype.exp, gdb.base/randomize.c, gdb.base/readline.exp, gdb.base/recurse.exp, gdb.base/regs.exp, gdb.base/relational.exp, gdb.base/relocate.exp, gdb.base/remote.exp, gdb.base/reread.exp, gdb.base/return.exp, gdb.base/return2.exp, gdb.base/scope.exp, gdb.base/sect-cmd.exp, gdb.base/sep-proc.c, gdb.base/sep.c, gdb.base/sep.exp, gdb.base/sepdebug.c, gdb.base/sepdebug.exp, gdb.base/setshow.exp, gdb.base/shlib-call.exp, gdb.base/sigaltstack.c, gdb.base/so-indr-cl.exp, gdb.base/solib.exp, gdb.base/source.exp, gdb.base/start.c, gdb.base/step-bt.c, gdb.base/step-line.exp, gdb.base/structs.c, gdb.base/structs.exp, gdb.base/structs2.exp, gdb.base/term.exp, gdb.base/twice.exp, gdb.base/type-opaque.exp, gdb.base/until.exp, gdb.base/value-double-free.c, gdb.base/varargs.exp, gdb.base/watchpoint.exp, gdb.base/whatis-exp.exp, gdb.disasm/am33.exp, gdb.disasm/h8300s.exp, gdb.disasm/hppa.exp, gdb.disasm/mn10300.exp, gdb.disasm/sh3.exp, gdb.disasm/t01_mov.exp, gdb.disasm/t02_mova.exp, gdb.disasm/t03_add.exp, gdb.disasm/t04_sub.exp, gdb.disasm/t05_cmp.exp, gdb.disasm/t06_ari2.exp, gdb.disasm/t07_ari3.exp, gdb.disasm/t08_or.exp, gdb.disasm/t09_xor.exp, gdb.disasm/t10_and.exp, gdb.disasm/t11_logs.exp, gdb.disasm/t12_bit.exp, gdb.disasm/t13_otr.exp, gdb.fortran/exprs.exp, gdb.fortran/types.exp, gdb.hp/gdb.aCC/exception.exp, gdb.hp/gdb.aCC/optimize.exp, gdb.hp/gdb.aCC/watch-cmd.exp, gdb.hp/gdb.base-hp/callfwmall.exp, gdb.hp/gdb.base-hp/dollar.exp, gdb.hp/gdb.base-hp/hwwatchbus.exp, gdb.hp/gdb.base-hp/pxdb.exp, gdb.hp/gdb.base-hp/reg-pa64.exp, gdb.hp/gdb.base-hp/reg.exp, gdb.hp/gdb.base-hp/sized-enum.exp, gdb.hp/gdb.base-hp/so-thresh.exp, gdb.hp/gdb.compat/xdb1.exp, gdb.hp/gdb.compat/xdb2.exp, gdb.hp/gdb.compat/xdb3.exp, gdb.java/jmisc.exp, gdb.java/jv-exp.exp, gdb.java/jv-print.exp, gdb.mi/gdb669.exp, gdb.mi/gdb680.exp, gdb.mi/gdb701.exp, gdb.mi/gdb792.exp, gdb.mi/mi-basics.exp, gdb.mi/mi-console.exp, gdb.mi/mi-hack-cli.exp, gdb.mi/mi-pending.c, gdb.mi/mi-pendshr.c, gdb.mi/mi-pthreads.exp, gdb.mi/mi-read-memory.exp, gdb.mi/mi-regs.exp, gdb.mi/mi-syn-frame.exp, gdb.mi/mi-until.exp, gdb.mi/mi2-basics.exp, gdb.mi/mi2-console.exp, gdb.mi/mi2-hack-cli.exp, gdb.mi/mi2-pthreads.exp, gdb.mi/mi2-read-memory.exp, gdb.mi/mi2-regs.exp, gdb.mi/mi2-syn-frame.exp, gdb.mi/mi2-until.exp, gdb.pascal/types.exp, gdb.stabs/weird.exp, gdb.threads/gcore-thread.exp, gdb.threads/manythreads.exp, gdb.threads/print-threads.exp, gdb.threads/pthreads.exp, gdb.threads/schedlock.exp, gdb.threads/step.exp, gdb.threads/step2.exp, gdb.threads/switch-threads.exp, gdb.threads/thread-specific.exp, gdb.threads/thread_check.exp, gdb.threads/thread_events.exp, gdb.threads/tls-nodebug.exp, gdb.threads/tls-shared.exp, gdb.threads/tls.exp, gdb.trace/actions.exp, gdb.trace/backtrace.exp, gdb.trace/circ.exp, gdb.trace/collection.exp, gdb.trace/deltrace.exp, gdb.trace/infotrace.exp, gdb.trace/limits.exp, gdb.trace/packetlen.exp, gdb.trace/passc-dyn.exp, gdb.trace/passcount.exp, gdb.trace/report.exp, gdb.trace/save-trace.exp, gdb.trace/tfind.exp, gdb.trace/tracecmd.exp, gdb.trace/while-dyn.exp, gdb.trace/while-stepping.exp, lib/mi-support.exp, lib/trace-support.exp: Remove reference to bug-gdb@prep.ai.mit.edu .
2008-01-01 Updated copyright notices for most files.Daniel Jacobowitz1-1/+1
2007-08-23 Switch the license of all .c files to GPLv3.Joel Brobecker1-3/+2
Switch the license of all .h files to GPLv3. Switch the license of all .cc files to GPLv3.
2007-01-09Copyright updates for 2007.Daniel Jacobowitz1-1/+1
2006-08-08 * gdb.base/step-bt.c: New file.Joel Brobecker1-0/+36
* gdb.base/step-bt.exp: New testcase.