Support read auxv #86

bet4it · 2021-09-27T12:29:17Z

Description

This PR implements the qXfer:auxv:read extension, based off the GDB documentation here.

API Stability

This PR does not require a breaking API change

Checklist

Implementation
- cargo build compiles without errors or warnings
- cargo clippy runs without errors or warnings
- cargo fmt was run
- All tests pass
Documentation
- rustdoc + approprate inline code comments
- Updated CHANGELOG.md
- (if appropriate) Added feature to "Debugging Features" in README.md
If implementing a new protocol extension IDET
- Included a basic sample implementation in examples/armv4t
- Included output of running examples/armv4t with RUST_LOG=trace + any relevant GDB output under the "Validation" section below
- Confirmed that IDET can be optimized away (using ./scripts/test_dead_code_elim.sh and/or ./example_no_std/check_size.sh)
- OR Implementation requires adding non-optional binary bloat (please elaborate under "Description")
If upstreaming an Arch implementation
- I have tested this code in my project, and to the best of my knowledge, it is working as intended.

Validation

GDB output

(gdb) info auxv
0    AT_NULL              End of vector                  0x0

armv4t output

    Finished dev [unoptimized + debuginfo] target(s) in 0.02s
     Running `target/debug/examples/armv4t`
loading section ".text" into memory from [0x55550000..0x55550078]
Setting PC to 0x55550000
Waiting for a GDB connection on "127.0.0.1:9001"...
Debugger connected from 127.0.0.1:48672
 TRACE gdbstub::protocol::recv_packet > <-- +
 TRACE gdbstub::protocol::recv_packet > <-- $qSupported:multiprocess+;swbreak+;hwbreak+;qRelocInsn+;fork-events+;vfork-events+;exec-events+;vContSupported+;QThreadEvents+;no-resumed+;xmlRegisters=i386#6a
 TRACE gdbstub::protocol::response_writer > --> $PacketSize=1000;vContSupported+;multiprocess+;QStartNoAckMode+;ReverseContinue+;ReverseStep+;QDisableRandomization+;QEnvironmentHexEncoded+;QEnvironmentUnset+;QEnvironmentReset+;QStartupWithShell+;QSetWorkingDir+;swbreak+;hwbreak+;QCatchSyscalls+;qXfer:features:read+;qXfer:memory-map:read+;qXfer:exec-file:read+;qXfer:auxv:read+#fa
 TRACE gdbstub::protocol::recv_packet     > <-- +
 TRACE gdbstub::protocol::recv_packet     > <-- $vMustReplyEmpty#3a
 INFO  gdbstub::gdbstub_impl              > Unknown command: Ok("vMustReplyEmpty")
 TRACE gdbstub::protocol::response_writer > --> $#00
 TRACE gdbstub::protocol::recv_packet     > <-- +
 TRACE gdbstub::protocol::recv_packet     > <-- $QStartNoAckMode#b0
 TRACE gdbstub::protocol::response_writer > --> $OK#9a
 TRACE gdbstub::protocol::recv_packet     > <-- +
 TRACE gdbstub::protocol::recv_packet     > <-- $Hgp0.0#ad
 TRACE gdbstub::protocol::response_writer > --> $OK#9a
 TRACE gdbstub::protocol::recv_packet     > <-- $qXfer:features:read:target.xml:0,ffb#79
 TRACE gdbstub::protocol::response_writer > --> $m<?xml version="1.0"?>
<!DOCTYPE target SYSTEM "gdb-target.dtd">
<target version="1.0">
    <architecture>armv4t</architecture>
    <feature name="org.gnu.gdb.arm.core">
        <vector id="padding" type="uint32" count="25"/>

        <reg name="r0" bitsize="32" type="uint32"/>
        <reg name="r1" bitsize="32" type="uint32"/>
        <reg name="r2" bitsize="32" type="uint32"/>
        <reg name="r3" bitsize="32" type="uint32"/>
        <reg name="r4" bitsize="32" type="uint32"/>
        <reg name="r5" bitsize="32" type="uint32"/>
        <reg name="r6" bitsize="32" type="uint32"/>
        <reg name="r7" bitsize="32" type="uint32"/>
        <reg name="r8" bitsize="32" type="uint32"/>
        <reg name="r9" bitsize="32" type="uint32"/>
        <reg name="r10" bitsize="32" type="uint32"/>
        <reg name="r11" bitsize="32" type="uint32"/>
        <reg name="r12" bitsize="32" type="uint32"/>
        <reg name="sp" bitsize="32" type="data_ptr"/>
        <reg name="lr" bitsize="32"/>
        <reg name="pc" bitsize="32" type="code_ptr"/>

        <!--
            For some reason, my version of `gdb-multiarch` doesn't seem to
            respect "regnum", and will not parse this custom target.xml unless I
            manually include the padding bytes in the target description.

            On the bright side, AFAIK, there aren't all that many architectures
            that use padding bytes. Heck, the only reason armv4t uses padding is
            for historical reasons (see comment below).

            Odds are if you're defining your own custom arch, you won't run into
            this issue, since you can just lay out all the registers in the
            correct order.
        -->
        <reg name="padding" type="padding" bitsize="32"/>

        <!-- The CPSR is register 25, rather than register 16, because
        the FPA registers historically were placed between the PC
        and the CPSR in the "g" packet. -->
        <reg name="cpsr" bitsize="32" regnum="25"/>
    </feature>
    <feature name="custom-armv4t-extension">
        <!--
            maps to a simple scratch register within the emulator. the GDB
            client can read the register using `p }custom` and set it using
            `set }custom=1337`
        -->
        <reg name="custom" bitsize="32" type="uint32"/>

        <!--
            pseudo-register that return the current time when read.

            notably, i've set up the target to NOT send this register as part of
            the regular register list, which means that GDB will fetch/update
            this register via the 'p' and 'P' packets respectively
        -->
        <reg name="time" bitsize="32" type="uint32"/>
    </feature>
</target>#0f
 TRACE gdbstub::protocol::recv_packet     > <-- $qXfer:features:read:target.xml:aa4,ffb#3f
 TRACE gdbstub::protocol::response_writer > --> $l#6c
 TRACE gdbstub::protocol::recv_packet     > <-- $qXfer:auxv:read::0,ffb#d8
 TRACE gdbstub::protocol::response_writer > --> $m#bb
 TRACE gdbstub::protocol::recv_packet     > <-- $qXfer:auxv:read::8,ffb#e0
 TRACE gdbstub::protocol::response_writer > --> $l#6c
 TRACE gdbstub::protocol::recv_packet     > <-- $qTStatus#49
 INFO  gdbstub::gdbstub_impl              > Unknown command: Ok("qTStatus")
 TRACE gdbstub::protocol::response_writer > --> $#00
 TRACE gdbstub::protocol::recv_packet     > <-- $?#3f
 TRACE gdbstub::protocol::response_writer > --> $S05#b8
 TRACE gdbstub::protocol::recv_packet     > <-- $qfThreadInfo#bb
 TRACE gdbstub::protocol::response_writer > --> $mp01.01#cd
 TRACE gdbstub::protocol::recv_packet     > <-- $qsThreadInfo#c8
 TRACE gdbstub::protocol::response_writer > --> $l#6c
 TRACE gdbstub::protocol::recv_packet     > <-- $qAttached:1#fa
GDB queried if it was attached to a process with PID 1
 TRACE gdbstub::protocol::response_writer > --> $1#31
 TRACE gdbstub::protocol::recv_packet     > <-- $qXfer:exec-file:read:1:0,ffb#b7
 TRACE gdbstub::protocol::response_writer > --> $m/test.elf#c1
 TRACE gdbstub::protocol::recv_packet     > <-- $qXfer:exec-file:read:1:9,ffb#c0
 TRACE gdbstub::protocol::response_writer > --> $l#6c
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:setfs:0#bf
 TRACE gdbstub::protocol::response_writer > --> $F0#76
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:open:6a7573742070726f62696e67,0,1c0#ed
 TRACE gdbstub::protocol::response_writer > --> $F-1,02#32
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:setfs:1#c0
 TRACE gdbstub::protocol::response_writer > --> $F0#76
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:open:2f746573742e656c66,0,0#1e
 TRACE gdbstub::protocol::response_writer > --> $F00#a6
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,0#ef
UUUUxx#eabstub::protocol::response_writer > --> $F1000;ELF(UU4@4 (
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:fstat:0#bc
 TRACE gdbstub::protocol::response_writer > --> $F40;p#26
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10540#b9
 TRACE gdbstub::protocol::response_writer > --> $F0230;UxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,34#26
 TRACE gdbstub::protocol::response_writer > --> $F1000;UUUUxx#83
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,104b2#e8
 TRACE gdbstub::protocol::response_writer > --> $F02be;.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10078#bf
 TRACE gdbstub::protocol::response_writer > --> $F06f8;s
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test.c                                                                                                            UUx[�
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                          jtest.cGNU C11 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599] -mfloat-abi=soft -marm -march=armv4t -g -O0 -std=c11mainGCC: (15:9-2019-q4-0ubuntu1) 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599]A)aeabi4   ▒▒
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,0#ef
UUUUxx#eabstub::protocol::response_writer > --> $F1000;ELF(UU4@4 (
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10540#b9
 TRACE gdbstub::protocol::response_writer > --> $F0230;UxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,34#26
 TRACE gdbstub::protocol::response_writer > --> $F1000;UUUUxx#83
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,104b2#e8
 TRACE gdbstub::protocol::response_writer > --> $F02be;.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10078#bf
 TRACE gdbstub::protocol::response_writer > --> $F06f8;s
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test.c                                                                                                            UUx[�
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,0#ef
UUUUxx#eabstub::protocol::response_writer > --> $F1000;ELF(UU4@4 (
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10540#b9
 TRACE gdbstub::protocol::response_writer > --> $F0230;UxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,34#26
 TRACE gdbstub::protocol::response_writer > --> $F1000;UUUUxx#83
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,104b2#e8
 TRACE gdbstub::protocol::response_writer > --> $F02be;.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10078#bf
 TRACE gdbstub::protocol::response_writer > --> $F06f8;s
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test.c                                                                                                            UUx[�
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,0#ef
UUUUxx#eabstub::protocol::response_writer > --> $F1000;ELF(UU4@4 (
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10540#b9
 TRACE gdbstub::protocol::response_writer > --> $F0230;UxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,34#26
 TRACE gdbstub::protocol::response_writer > --> $F1000;UUUUxx#83
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,104b2#e8
 TRACE gdbstub::protocol::response_writer > --> $F02be;.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10078#bf
 TRACE gdbstub::protocol::response_writer > --> $F06f8;s
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test.c                                                                                                            UUx[�
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                          jtest.cGNU C11 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599] -mfloat-abi=soft -marm -march=armv4t -g -O0 -std=c11mainGCC: (15:9-2019-q4-0ubuntu1) 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599]A)aeabi4   ▒▒
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,0#ef
UUUUxx#eabstub::protocol::response_writer > --> $F1000;ELF(UU4@4 (
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:fstat:0#bc
 TRACE gdbstub::protocol::response_writer > --> $F40;p#26
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:fstat:0#bc
 TRACE gdbstub::protocol::response_writer > --> $F40;p#26
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,102fc#1b
 TRACE gdbstub::protocol::response_writer > --> $F0474;UUxU  
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:open:2f746573742e656c66,0,0#1e
 TRACE gdbstub::protocol::response_writer > --> $F00#a6
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,0#ef
UUUUxx#eabstub::protocol::response_writer > --> $F1000;ELF(UU4@4 (
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:fstat:0#bc
 TRACE gdbstub::protocol::response_writer > --> $F40;p#26
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10540#b9
 TRACE gdbstub::protocol::response_writer > --> $F0230;UxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,34#26
 TRACE gdbstub::protocol::response_writer > --> $F1000;UUUUxx#83
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,104b2#e8
 TRACE gdbstub::protocol::response_writer > --> $F02be;.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10078#bf
 TRACE gdbstub::protocol::response_writer > --> $F06f8;s
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test.c                                                                                                            UUx[�
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,0#ef
UUUUxx#eabstub::protocol::response_writer > --> $F1000;ELF(UU4@4 (
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10540#b9
 TRACE gdbstub::protocol::response_writer > --> $F0230;UxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,34#26
 TRACE gdbstub::protocol::response_writer > --> $F1000;UUUUxx#83
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,104b2#e8
 TRACE gdbstub::protocol::response_writer > --> $F02be;.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10078#bf
 TRACE gdbstub::protocol::response_writer > --> $F06f8;s
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test.c                                                                                                            UUx[�
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                          jtest.cGNU C11 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599] -mfloat-abi=soft -marm -march=armv4t -g -O0 -std=c11mainGCC: (15:9-2019-q4-0ubuntu1) 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599]A)aeabi4   ▒▒
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   xUU▒xUUxUU+xUU7UUx<xUUIxUUWUUtest.c}a__DATA_START__end__DATA_END____BSS_END__main__TEXT_END____BSS_START____TEXT_START__.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
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 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,0#ef
UUUUxx#eabstub::protocol::response_writer > --> $F1000;ELF(UU4@4 (
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10540#b9
 TRACE gdbstub::protocol::response_writer > --> $F0230;UxxUUx&xw2�U@D Od_[0��f0HYop�}
�0�P
        Lf��#cc
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,34#26
 TRACE gdbstub::protocol::response_writer > --> $F1000;UUUUxx#83
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,104b2#e8
 TRACE gdbstub::protocol::response_writer > --> $F02be;.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
�0�P
        Lf��#d8
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10078#bf
 TRACE gdbstub::protocol::response_writer > --> $F06f8;s
                                                        .UUx�oUUx�ox o�ty    o�l4UU0i        o�pint%
                                                                                                   ?:
                                                                                                     ;
                                                                                                      9
                                                                                                       I@▒�B:
                                                                                                             ;
                                                                                                              9
                                                                                                               I▒
                                                                                                                 }

                                                                                                                  >
test.c                                                                                                            UUx[�
      UU        gKLgiJ
                      /%ef
                          jtest.cGNU C11 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599] -mfloat-abi=soft -marm -march=armv4t -g -O0 -std=c11mainGCC: (15:9-2019-q4-0ubuntu1) 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599]A)aeabi4   ▒▒
                                                                                 ����|
UUxB�B
B�UUxU  
�UU
   xUU▒xUUxUU+xUU7UUx<xUUIxUUWUUtest.c}a__DATA_START__end__DATA_END____BSS_END__main__TEXT_END____BSS_START____TEXT_START__.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
�0�P
        Lf��#90
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,0#ef
UUUUxx#eabstub::protocol::response_writer > --> $F1000;ELF(UU4@4 (
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10540#b9
 TRACE gdbstub::protocol::response_writer > --> $F0230;UxxUUx&xw2�U@D Od_[0��f0HYop�}
�0�P
        Lf��#cc
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,34#26
 TRACE gdbstub::protocol::response_writer > --> $F1000;UUUUxx#83
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,104b2#e8
 TRACE gdbstub::protocol::response_writer > --> $F02be;.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
�0�P
        Lf��#d8
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10078#bf
 TRACE gdbstub::protocol::response_writer > --> $F06f8;s
                                                        .UUx�oUUx�ox o�ty    o�l4UU0i        o�pint%
                                                                                                   ?:
                                                                                                     ;
                                                                                                      9
                                                                                                       I@▒�B:
                                                                                                             ;
                                                                                                              9
                                                                                                               I▒
                                                                                                                 }

                                                                                                                  >
test.c                                                                                                            UUx[�
      UU        gKLgiJ
                      /%ef
                          jtest.cGNU C11 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599] -mfloat-abi=soft -marm -march=armv4t -g -O0 -std=c11mainGCC: (15:9-2019-q4-0ubuntu1) 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599]A)aeabi4   ▒▒
                                                                                 ����|
UUxB�B
B�UUxU  
�UU
   xUU▒xUUxUU+xUU7UUx<xUUIxUUWUUtest.c}a__DATA_START__end__DATA_END____BSS_END__main__TEXT_END____BSS_START____TEXT_START__.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
�0�P
        Lf��#90
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,0#ef
UUUUxx#eabstub::protocol::response_writer > --> $F1000;ELF(UU4@4 (
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:fstat:0#bc
 TRACE gdbstub::protocol::response_writer > --> $F40;p#26
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:fstat:0#bc
 TRACE gdbstub::protocol::response_writer > --> $F40;p#26
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,102fc#1b
 TRACE gdbstub::protocol::response_writer > --> $F0474;UUxU  
�UU
   xUU▒xUUxUU+xUU7UUx<xUUIxUUWUUtest.c}a__DATA_START__end__DATA_END____BSS_END__main__TEXT_END____BSS_START____TEXT_START__.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
�0�P
        Lf��#31
 TRACE gdbstub::protocol::recv_packet     > <-- $vFile:pread:0,1000,10078#bf
 TRACE gdbstub::protocol::response_writer > --> $F06f8;s
                                                        .UUx�oUUx�ox o�ty    o�l4UU0i        o�pint%
                                                                                                   ?:
                                                                                                     ;
                                                                                                      9
                                                                                                       I@▒�B:
                                                                                                             ;
                                                                                                              9
                                                                                                               I▒
                                                                                                                 }

                                                                                                                  >
test.c                                                                                                            UUx[�
      UU        gKLgiJ
                      /%ef
                          jtest.cGNU C11 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599] -mfloat-abi=soft -marm -march=armv4t -g -O0 -std=c11mainGCC: (15:9-2019-q4-0ubuntu1) 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599]A)aeabi4   ▒▒
                                                                                 ����|
UUxB�B
B�UUxU  
�UU
   xUU▒xUUxUU+xUU7UUx<xUUIxUUWUUtest.c}a__DATA_START__end__DATA_END____BSS_END__main__TEXT_END____BSS_START____TEXT_START__.symtab.strtab.shstrtab.text.bss.debug_info.debug_abbrev.debug_aranges.debug_line.debug_str.comment.ARM.attributes.debug_frameUxxUUx&xw2�U@D Od_[0��f0HYop�}
�0�P
        Lf��#90
 TRACE gdbstub::protocol::recv_packet     > <-- $qSymbol::#5b
 INFO  gdbstub::gdbstub_impl              > Unknown command: Ok("qSymbol::")
 TRACE gdbstub::protocol::response_writer > --> $#00
 TRACE gdbstub::protocol::recv_packet     > <-- $qXfer:exec-file:read:1:0,ffb#b7
 TRACE gdbstub::protocol::response_writer > --> $m/test.elf#c1
 TRACE gdbstub::protocol::recv_packet     > <-- $qXfer:exec-file:read:1:9,ffb#c0
 TRACE gdbstub::protocol::response_writer > --> $l#6c
 TRACE gdbstub::protocol::recv_packet     > <-- $Hc-1#09
 TRACE gdbstub::protocol::response_writer > --> $OK#9a
 TRACE gdbstub::protocol::recv_packet     > <-- $qC#b4
 INFO  gdbstub::gdbstub_impl              > Unknown command: Ok("qC")
 TRACE gdbstub::protocol::response_writer > --> $#00
 TRACE gdbstub::protocol::recv_packet     > <-- $qOffsets#4b
 TRACE gdbstub::protocol::response_writer > --> $Text=00;Data=00;Bss=00#94
 TRACE gdbstub::protocol::recv_packet     > <-- $g#67
 TRACE gdbstub::protocol::response_writer > --> $00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000107856341200005555xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx1000000078563412#0a
 TRACE gdbstub::protocol::recv_packet     > <-- $qXfer:auxv:read::0,ffb#d8
 TRACE gdbstub::protocol::response_writer > --> $m#bb
 TRACE gdbstub::protocol::recv_packet     > <-- $qXfer:auxv:read::8,ffb#e0
 TRACE gdbstub::protocol::response_writer > --> $l#6c
 TRACE gdbstub::protocol::recv_packet     > <-- $qfThreadInfo#bb
 TRACE gdbstub::protocol::response_writer > --> $mp01.01#cd
 TRACE gdbstub::protocol::recv_packet     > <-- $qsThreadInfo#c8
 TRACE gdbstub::protocol::response_writer > --> $l#6c
 TRACE gdbstub::protocol::recv_packet     > <-- $qXfer:memory-map:read::0,ffb#18
 TRACE gdbstub::protocol::response_writer > --> $m<?xml version="1.0"?>
<!DOCTYPE memory-map
    PUBLIC "+//IDN gnu.org//DTD GDB Memory Map V1.0//EN"
            "http://sourceware.org/gdb/gdb-memory-map.dtd">
<memory-map>
    <memory type="ram" start="0x0" length="0x100000000"/>
</memory-map>#76
 TRACE gdbstub::protocol::recv_packet     > <-- $qXfer:memory-map:read::f4,ffb#82
 TRACE gdbstub::protocol::response_writer > --> $l#6c
 TRACE gdbstub::protocol::recv_packet     > <-- $m55550000,4#61
 TRACE gdbstub::protocol::response_writer > --> $04b02de5#26
 TRACE gdbstub::protocol::recv_packet     > <-- $m5554fffc,4#35
 TRACE gdbstub::protocol::response_writer > --> $00000000#7e
 TRACE gdbstub::protocol::recv_packet     > <-- $m55550000,4#61
 TRACE gdbstub::protocol::response_writer > --> $04b02de5#26
 TRACE gdbstub::protocol::recv_packet     > <-- $m5554fffc,4#35
 TRACE gdbstub::protocol::response_writer > --> $00000000#7e
 TRACE gdbstub::protocol::recv_packet     > <-- $m55550000,2#5f
 TRACE gdbstub::protocol::response_writer > --> $04b0#f6
 TRACE gdbstub::protocol::recv_packet     > <-- $m5554fffe,2#35
 TRACE gdbstub::protocol::response_writer > --> $0000#7a
 TRACE gdbstub::protocol::recv_packet     > <-- $m5554fffc,2#33
 TRACE gdbstub::protocol::response_writer > --> $0000#7a
 TRACE gdbstub::protocol::recv_packet     > <-- $m55550000,2#5f
 TRACE gdbstub::protocol::response_writer > --> $04b0#f6
 TRACE gdbstub::protocol::recv_packet     > <-- $m5554fffe,2#35
 TRACE gdbstub::protocol::response_writer > --> $0000#7a
 TRACE gdbstub::protocol::recv_packet     > <-- $m5554fffc,2#33
 TRACE gdbstub::protocol::response_writer > --> $0000#7a
 TRACE gdbstub::protocol::recv_packet     > <-- $m55550000,4#61
 TRACE gdbstub::protocol::response_writer > --> $04b02de5#26
 TRACE gdbstub::protocol::recv_packet     > <-- $m5554fffc,4#35
 TRACE gdbstub::protocol::response_writer > --> $00000000#7e
 TRACE gdbstub::protocol::recv_packet     > <-- $m55550000,4#61
 TRACE gdbstub::protocol::response_writer > --> $04b02de5#26
 TRACE gdbstub::protocol::recv_packet     > <-- $m5554fffc,4#35
 TRACE gdbstub::protocol::response_writer > --> $00000000#7e
 TRACE gdbstub::protocol::recv_packet     > <-- $m55550000,4#61
 TRACE gdbstub::protocol::response_writer > --> $04b02de5#26
 TRACE gdbstub::protocol::recv_packet     > <-- $m55550000,4#61
 TRACE gdbstub::protocol::response_writer > --> $04b02de5#26
 TRACE gdbstub::protocol::recv_packet     > <-- $m55550000,4#61
 TRACE gdbstub::protocol::response_writer > --> $04b02de5#26

daniel5151 · 2021-09-27T17:19:54Z

src/protocol/commands/_qXfer_exec_file.rs

@@ -32,6 +32,6 @@ impl<'a> ParseCommand<'a> for qXferExecFileRead<'a> {

        drop(body);

-        Some(qXferExecFileRead {pid, offset, length, buf})
+        Some(qXferExecFileRead { pid, offset, length, buf })


fascinating... I ran cargo +nightly fmt --all -v -- --check -v, and it seems none of the files under commands are being checked for formatting! I assume this has something to do with the auto-generated nature of the modules...

I should probably file a issue upstream about this.

daniel5151

Awesome - couldn't have written it better myself.

Thanks for the implementation!

bet4it added 2 commits September 26, 2021 10:08

Support read auxv

d45ff4d

Fix format

f27fd96

daniel5151 self-requested a review September 27, 2021 17:06

daniel5151 reviewed Sep 27, 2021

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daniel5151 approved these changes Sep 27, 2021

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daniel5151 merged commit 623cca5 into daniel5151:dev/0.6 Sep 27, 2021

bet4it deleted the auxv branch September 28, 2021 05:17

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Support read auxv #86

Support read auxv #86

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Support read auxv #86

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bet4it commented Sep 27, 2021

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