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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - LMA/VMA issue on ARMv7 bare metal"
href="https://bugs.llvm.org/show_bug.cgi?id=38776">38776</a>
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<tr>
<th>Summary</th>
<td>LMA/VMA issue on ARMv7 bare metal
</td>
</tr>
<tr>
<th>Product</th>
<td>lld
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>other
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>ELF
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>eblot.ml@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
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<pre>Hi,
This might be a follow up of <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - lld does not seem to honour the linker script load address"
href="show_bug.cgi?id=34407">https://bugs.llvm.org/show_bug.cgi?id=34407</a>.
Using the same environment, using clang/LLVM 7.0.0-rc2, it seems LLD has
another trouble with LMA.
Using a similar LD script:
MEMORY
{
FLASH (rx) : ORIGIN = 0x26000, LENGTH = 0x5a000
RAM (rwx) : ORIGIN = 0x200014b8, LENGTH = 0xeb48
}
ENTRY(Reset_Handler)
SECTIONS
{
.text :
{
} > FLASH
/* ... other sections that go to FLASH region */
__etext = .;
.data : AT (__etext)
{
__data_start__ = .;
*(.data*)
} > RAM
/* ... other sections that go to RAM region */
}
the ld.lld ELF output produces something unexpected:
$ arm-none-eabi-nm powernode/powernode.elf | egrep -e '__etext|__data_start'
200014b8 D __data_start__
00069f8c R __etext
$ arm-none-eabi-objdump -h powernode/powernode.elf | egrep -e '\.data|Idx'
Idx Name Size VMA LMA File off Algn
21 .data 0000082c 200014b8 200014b8 00112550 2**3
I would have expected .data LMA to be 00069f8c, *not* 200014b8
A weird thing is that with another version of the same project, using the same
compilation suite (7.0.0-rc2) and the same linker script, the output is as
expected:
$ arm-none-eabi-nm powernode/powernode.elf | egrep -e '__etext|__data_start'
20002400 D __data_start__
00060c08 R __etext
$ arm-none-eabi-objdump -h powernode/powernode.elf | egrep -e '\.data|Idx'
Idx Name Size VMA LMA File off Algn
8 .data 00000820 20002400 00060c08 0003f400 2**3
I can provide a repro tar file, but I'd like it not to be publicly available if
possible. Any way to do this?</pre>
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