65a15a56d5
Fix #64600: the currently implementation is minimal (see https://reviews.llvm.org/D83758), and an assignment like `__TEXT_REGION_ORIGIN__ = DEFINED(__TEXT_REGION_ORIGIN__) ? __TEXT_REGION_ORIGIN__ : 0;` (used by avr-ld[1]) leads to a value of zero (default value in `declareSymbol`), which is unexpected. Assign orders to symbol assignments and references so that for a script-defined symbol, the `DEFINED` results match users' expectation. I am unclear about GNU ld's exact behavior, but this hopefully matches its behavior in the majority of cases. [1]: https://sourceware.org/git/?p=binutils-gdb.git;a=blob;f=ld/scripttempl/avr.sc
46 lines
1.7 KiB
Plaintext
46 lines
1.7 KiB
Plaintext
# REQUIRES: x86
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# RUN: llvm-mc -filetype=obj -triple=x86_64 %p/Inputs/define.s -o %t.o
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# RUN: ld.lld -o %t --defsym vv=1 --script %s %t.o
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# RUN: llvm-readelf -S -s %t | FileCheck %s
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# CHECK: [Nr] Name Type Address Off Size ES Flg Lk Inf Al
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# CHECK-NEXT: [ 0] NULL 0000000000000000 000000 000000 00 0 0 0
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# CHECK-NEXT: [ 1] .foo PROGBITS 0000000000011000 001000 000008 00 A 0 0 1
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# CHECK-NEXT: [ 2] .bar PROGBITS 0000000000013000 003000 000008 00 A 0 0 1
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# CHECK-NEXT: [ 3] .test PROGBITS 0000000000015000 005000 000008 00 A 0 0 1
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# CHECK-NEXT: [ 4] .text PROGBITS 0000000000015008 005008 000000 00 AX 0 0 4
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# CHECK: Value Size Type Bind Vis Ndx Name
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# CHECK-DAG: 0000000000000001 0 NOTYPE GLOBAL DEFAULT ABS vv
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# CHECK-DAG: 0000000000000009 0 NOTYPE GLOBAL DEFAULT ABS ww
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# CHECK-DAG: 0000000000000001 0 NOTYPE GLOBAL DEFAULT ABS x1
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# CHECK-DAG: 0000000000000002 0 NOTYPE GLOBAL DEFAULT ABS x2
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# CHECK-DAG: 0000000000000001 0 NOTYPE GLOBAL DEFAULT ABS y1
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# CHECK-DAG: 0000000000000002 0 NOTYPE GLOBAL DEFAULT ABS y2
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EXTERN(extern_defined)
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SECTIONS {
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. = DEFINED(defined) ? 0x11000 : .;
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.foo : { *(.foo*) }
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. = DEFINED(notdefined) ? 0x12000 : 0x13000;
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.bar : { *(.bar*) }
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. = DEFINED(extern_defined) ? 0x14000 : 0x15000;
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## Take the value from --defsym.
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vv = DEFINED(vv) ? vv : 9;
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## 9 as ww is undefined.
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ww = DEFINED(ww) ? ww : 9;
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## 1 as xx is not yet defined.
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x1 = DEFINED(xx) ? 2 : 1;
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.test : {
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xx = .;
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*(.test*)
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}
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x2 = DEFINED(xx) ? 2 : 1;
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y1 = DEFINED(yy) ? 2 : 1;
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yy = .;
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y2 = DEFINED(yy) ? 2 : 1;
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}
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