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cmd/objdump: does not provide file/line info for files built with -buildmode=pie #17883

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ianlancetaylor opened this issue Nov 10, 2016 · 4 comments
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cmd/objdump: does not provide file/line info for files built with -buildmode=pie #17883

ianlancetaylor opened this issue Nov 10, 2016 · 4 comments
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compiler/runtime Issues related to the Go compiler and/or runtime. NeedsFix The path to resolution is known, but the work has not been done.
Milestone
Go1.20

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@ianlancetaylor
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go build -buildmode=pie ~/hello.go
go tool objdump -s 'main.main' hello

Observe that the file/line information is shown as just :0. If you do the same commands but omit -buildmode=pie the correct file/line information is shown.

I have a partial fix for this, but a full fix requires applying the dynamic relocations to the pclntab data. The RELATIVE dynamic relocations can be ignored, but there are some non-relative relocations to symbols defined in runtime/cgo.
@ianlancetaylor ianlancetaylor added this to the Go1.9 milestone Nov 10, 2016
@bradfitz bradfitz added the NeedsFix The path to resolution is known, but the work has not been done. label May 22, 2017
@bradfitz bradfitz modified the milestones: Go1.9Maybe, Go1.9 May 22, 2017
@bradfitz
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Ian, still interested in this for 1.9?

@ianlancetaylor
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Moving to 1.10.

@ianlancetaylor ianlancetaylor modified the milestones: Go1.10, Go1.9Maybe Jun 2, 2017
@rsc rsc modified the milestones: Go1.10, Go1.11 Nov 22, 2017
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Change https://golang.org/cl/118775 mentions this issue: cmd/internal/objfile: fetch pclntab for PIE

@ianlancetaylor ianlancetaylor modified the milestones: Go1.11, Unplanned Jun 23, 2018
@ianlancetaylor ianlancetaylor mentioned this issue Dec 10, 2018
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@ianlancetaylor ianlancetaylor mentioned this issue Jun 7, 2021
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@cherrymui cherrymui mentioned this issue Nov 23, 2021
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@cherrymui cherrymui mentioned this issue Dec 20, 2021
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@gopherbot gopherbot added the compiler/runtime Issues related to the Go compiler and/or runtime. label Jul 13, 2022
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Change https://go.dev/cl/227483 mentions this issue: cmd/internal/objfile: read file/line information for ELF PIE binaries

@dmitshur dmitshur modified the milestones: Unplanned, Go1.20 Jun 11, 2023
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compiler/runtime Issues related to the Go compiler and/or runtime. NeedsFix The path to resolution is known, but the work has not been done.
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@bradfitz @rsc @dmitshur @ianlancetaylor @gopherbot