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| author | Alan Modra <amodra@gmail.com> | 2019-12-16 10:00:39 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2019-12-16 17:34:29 +1030 |
| commit | 84e098cdea4eb6a5ddc525a2145ffe66475fa2af (patch) | |
| tree | 569550d423ddb6dd4ebaaeadf3e2ae77478b726f /opcodes | |
| parent | 36bd8ea7f06126d3e73d9644325c4bbfbd5c89f4 (diff) | |
| download | gdb-84e098cdea4eb6a5ddc525a2145ffe66475fa2af.zip gdb-84e098cdea4eb6a5ddc525a2145ffe66475fa2af.tar.gz gdb-84e098cdea4eb6a5ddc525a2145ffe66475fa2af.tar.bz2 | |
asan: score: global-buffer-overflow
I'm flying blind here, not having an s+core s3 insn set reference,
but this seems reasonably obvious from what is done by the assembler.
s3_do16_rpop does some mixing of imm and reg values to place in the
rpop reg field, but I'm not going to try to fix the disassembly
there.
* score-dis.c (print_insn_score16): Move rpush/rpop imm field
value adjustment so that it doesn't affect reg field too.
Diffstat (limited to 'opcodes')
| -rw-r--r-- | opcodes/ChangeLog | 5 | ||||
| -rw-r--r-- | opcodes/score-dis.c | 16 |
2 files changed, 12 insertions, 9 deletions
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog index 9cc0ba4..ce56ec0 100644 --- a/opcodes/ChangeLog +++ b/opcodes/ChangeLog @@ -1,5 +1,10 @@ 2019-12-16 Alan Modra <amodra@gmail.com> + * score-dis.c (print_insn_score16): Move rpush/rpop imm field + value adjustment so that it doesn't affect reg field too. + +2019-12-16 Alan Modra <amodra@gmail.com> + * crx-dis.c (EXTRACT, SBM): Avoid signed overflow. (get_number_of_operands, getargtype, getbits, getregname), (getcopregname, getprocregname, gettrapstring, getcinvstring), diff --git a/opcodes/score-dis.c b/opcodes/score-dis.c index 69c801b..74a1f1d 100644 --- a/opcodes/score-dis.c +++ b/opcodes/score-dis.c @@ -954,15 +954,6 @@ print_insn_score16 (bfd_vma pc, struct disassemble_info *info, long given) reg = given >> bitstart; reg &= (2 << (bitend - bitstart)) - 1; - /* Check rpush rd, 0 and rpop! rd, 0. - If reg = 0, then set to 32. */ - if (((given & 0x00007c00) == 0x00006c00 - || (given & 0x00007c00) == 0x00006800) - && reg == 0) - { - reg = 32; - } - switch (*c) { case 'R': @@ -972,6 +963,13 @@ print_insn_score16 (bfd_vma pc, struct disassemble_info *info, long given) func (stream, "%s", score_regnames[reg]); break; case 'd': + /* Check rpush rd, 0 and rpop! rd, 0. + If 0, then print 32. */ + if (((given & 0x00007c00) == 0x00006c00 + || (given & 0x00007c00) == 0x00006800) + && reg == 0) + reg = 32; + if (*(c + 1) == '\0') func (stream, "%ld", reg); else |