[llvm-bugs] [Bug 52510] New: Load address range overlap reported when ALIGN is used with LMA and VMA regions
via llvm-bugs
llvm-bugs at lists.llvm.org
Mon Nov 15 06:35:38 PST 2021
https://bugs.llvm.org/show_bug.cgi?id=52510
Bug ID: 52510
Summary: Load address range overlap reported when ALIGN is used
with LMA and VMA regions
Product: lld
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: ELF
Assignee: unassignedbugs at nondot.org
Reporter: konstantin.schwarz at hightec-rt.com
CC: llvm-bugs at lists.llvm.org, smithp352 at googlemail.com
In the example shown below, the following error is reported:
ld.lld: error: section .data3 load address range overlaps with .data
>>> .data3 range is [0x8000005, 0x800000C]
>>> .data range is [0x8000008, 0x800000B]
linkerscript:
```
MEMORY
{
CODE (rx) : ORIGIN = 0x08000000, LENGTH = 512K
DATA (rw) : ORIGIN = 0x20000400, LENGTH = 95K
}
SECTIONS
{
.text :
{
*(.text)
} > CODE
.data : ALIGN(8)
{
. += 4;
} > DATA AT> CODE
/* This section is needed to get a new program header created for .data3 */
.data2 :
{
. += 8;
} > DATA
.data3 :
{
. += 8;
} > DATA AT> CODE
}
```
source file:
```
.text
.globl _start
_start:
nop
```
Looking at the ELF that we get when using `--no-check-sections`, we find the
following program headers:
```
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
LOAD 0x0000000000001000 0x0000000008000000 0x0000000008000000
0x0000000000000001 0x0000000000000001 R E 0x1000
LOAD 0x0000000000001400 0x0000000020000400 0x0000000008000008
0x0000000000000004 0x0000000000000004 R E 0x1000
LOAD 0x0000000000001404 0x0000000020000404 0x0000000020000404
0x0000000000000008 0x0000000000000008 R E 0x1000
LOAD 0x000000000000140c 0x000000002000040c 0x0000000008000005
0x0000000000000008 0x0000000000000008 R E 0x1000
```
, indicating that .data3 is not aware of the alignment requirement of .data
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