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[3.14] gh-136541: Fix several problems of perf trampolines in x86_64 and aarch64 (GH-136500)#136544

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pablogsal merged 2 commits intopython:3.14python/cpython:3.14from
miss-islington:backport-236f733-3.14miss-islington/cpython:backport-236f733-3.14Copy head branch name to clipboard
Jul 11, 2025
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[3.14] gh-136541: Fix several problems of perf trampolines in x86_64 and aarch64 (GH-136500)#136544
pablogsal merged 2 commits intopython:3.14python/cpython:3.14from
miss-islington:backport-236f733-3.14miss-islington/cpython:backport-236f733-3.14Copy head branch name to clipboard

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@miss-islington miss-islington commented Jul 11, 2025

This commit fixes the following problems:

  • The x86_64 trampolines are not preserving frame pointers
  • The hardcoded offsets to the code segment from the FDE only worked properly for x64_64
  • The CIE data was not following conventions of aarch64
  • The eh_frame for aarch64 was not fully correct
    (cherry picked from commit 236f733)

Co-authored-by: Pablo Galindo Salgado Pablogsal@gmail.com

…nd aarch64 (pythonGH-136500)

This commit fixes the following problems:

* The x86_64 trampolines are not preserving frame pointers
* The hardcoded offsets to the code segment from the FDE only worked properly for x64_64
* The CIE data was not following conventions of aarch64
* The eh_frame for aarch64 was not fully correct
(cherry picked from commit 236f733)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
@pablogsal pablogsal merged commit 5535482 into python:3.14 Jul 11, 2025
41 checks passed
kumaraditya303 pushed a commit to miss-islington/cpython that referenced this pull request Sep 9, 2025
…86_64 and aarch64 (pythonGH-136500) (python#136544)

pythongh-136541: Fix several problems of perf trampolines in x86_64 and aarch64 (pythonGH-136500)

This commit fixes the following problems:

* The x86_64 trampolines are not preserving frame pointers
* The hardcoded offsets to the code segment from the FDE only worked properly for x64_64
* The CIE data was not following conventions of aarch64
* The eh_frame for aarch64 was not fully correct
(cherry picked from commit 236f733)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
@miss-islington miss-islington deleted the backport-236f733-3.14 branch January 2, 2026 17:43
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