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| author | Omair Javaid <omair.javaid@linaro.org> | 2018-05-26 05:58:51 +0500 |
|---|---|---|
| committer | Omair Javaid <omair.javaid@linaro.org> | 2018-05-31 07:31:21 +0500 |
| commit | 5969f0dba74e17c694faf333b120f1e0b95783ed (patch) | |
| tree | 5b1969d7d5c41099b6e0ec201fbad028b264b4f3 /gdb/gdbarch.c | |
| parent | 0034eed03a7428c4902244a33a286763bca65016 (diff) | |
| download | binutils-gdb-5969f0dba74e17c694faf333b120f1e0b95783ed.tar.gz | |
Unset gdbarch significant_addr_bit by default
This patch fixes a bug introduced by fix to AArch64 pointer tagging.
In our fix for tagged pointer support our agreed approach was to sign
extend user-space address after clearing tag bits. This is not same
for all architectures and this patch allows sign extension for
addresses on targets which specifically set significant_addr_bit.
More information about patch that caused the issues and discussion
around tagged pointer support can be found in links below:
https://sourceware.org/ml/gdb-patches/2018-05/msg00000.html
https://sourceware.org/ml/gdb-patches/2017-12/msg00159.html
gdb/ChangeLog:
2018-05-31 Omair Javaid <omair.javaid@linaro.org>
PR gdb/23210
* gdbarch.sh (significant_addr_bit): Default to zero when
not set by target architecture.
* gdbarch.c: Re-generated.
* utils.c (address_significant): Update.
Diffstat (limited to 'gdb/gdbarch.c')
| -rw-r--r-- | gdb/gdbarch.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c index c430ebe52a4..558cc555b4b 100644 --- a/gdb/gdbarch.c +++ b/gdb/gdbarch.c @@ -615,8 +615,7 @@ verify_gdbarch (struct gdbarch *gdbarch) /* Skip verify of stabs_argument_has_addr, invalid_p == 0 */ /* Skip verify of convert_from_func_ptr_addr, invalid_p == 0 */ /* Skip verify of addr_bits_remove, invalid_p == 0 */ - if (gdbarch->significant_addr_bit == 0) - gdbarch->significant_addr_bit = gdbarch_addr_bit (gdbarch); + /* Skip verify of significant_addr_bit, invalid_p == 0 */ /* Skip verify of software_single_step, has predicate. */ /* Skip verify of single_step_through_delay, has predicate. */ /* Skip verify of print_insn, invalid_p == 0 */ @@ -3209,6 +3208,7 @@ int gdbarch_significant_addr_bit (struct gdbarch *gdbarch) { gdb_assert (gdbarch != NULL); + /* Skip verify of significant_addr_bit, invalid_p == 0 */ if (gdbarch_debug >= 2) fprintf_unfiltered (gdb_stdlog, "gdbarch_significant_addr_bit called\n"); return gdbarch->significant_addr_bit; |