mozilla-firefox embeds a libavcodec that can be triggered by sites doing
audio recording. Port over kettenis's fft.asm fix from ffmpeg. ok landry
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@ -8,7 +8,7 @@ MOZILLA_PROFDATA_TASKID=E6EpiLkcTuGLthcSZ80YWA
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MOZILLA_BRANCH = release
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MOZILLA_PROJECT = firefox
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MOZILLA_CODENAME = browser
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REVISION = 0
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REVISION = 1
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WRKDIST = ${WRKDIR}/${MOZILLA_DIST}-${MOZILLA_DIST_VERSION:C/b[0-9]*//}
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HOMEPAGE = https://www.mozilla.org/firefox/
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@ -0,0 +1,43 @@
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The x86 assembly FFT implementation uses dispatch tables in .text. This is
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incompatible with x-only so move them into .data.rel.ro where we can have
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relocations. But since they are in the RELRO segment they will be made
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read-only by ld.so after relocations have been processed.
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Index: media/ffvpx/libavcodec/x86/fft.asm
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--- media/ffvpx/libavcodec/x86/fft.asm.orig
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+++ media/ffvpx/libavcodec/x86/fft.asm
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@@ -457,10 +457,6 @@ DEFINE_ARGS zc, w, n, o1, o3
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%macro FFT_DISPATCH 2; clobbers 5 GPRs, 8 XMMs
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lea r2, [dispatch_tab%1]
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mov r2, [r2 + (%2q-2)*gprsize]
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-%ifdef PIC
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- lea r3, [$$]
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- add r2, r3
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-%endif
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call r2
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%endmacro ; FFT_DISPATCH
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@@ -585,12 +581,6 @@ cglobal imdct_calc, 3,5,3
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jl .loop
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REP_RET
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-%ifdef PIC
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-%define SECTION_REL - $$
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-%else
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-%define SECTION_REL
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-%endif
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-
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%macro DECL_FFT 1-2 ; nbits, suffix
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%ifidn %0, 1
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%xdefine fullsuffix SUFFIX
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@@ -627,8 +617,10 @@ fft %+ n %+ fullsuffix:
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%endrep
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%undef n
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+[SECTION .data.rel.ro write]
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align 8
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dispatch_tab %+ fullsuffix: pointer list_of_fft
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+__?SECT?__
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%endmacro ; DECL_FFT
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%if HAVE_AVX_EXTERNAL
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