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libffi: Use #define instead of .macro in src/x86/win64.S [PR102874]

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The libffi 3.4.2 import badly broke Solaris/x86 bootstrap with the native
assembler:

Assembler:
        "/vol/gcc/src/hg/master/local/libffi/src/x86/win64.S", line 88 :
Illegal mnemonic
        Near line: ".macro epilogue"
        "/vol/gcc/src/hg/master/local/libffi/src/x86/win64.S", line 88 : Syntax
error
        Near line: ".macro epilogue"
        "/vol/gcc/src/hg/master/local/libffi/src/x86/win64.S", line 95 :
Illegal mnemonic
        Near line: ".endm"
        "/vol/gcc/src/hg/master/local/libffi/src/x86/win64.S", line 95 : Syntax
error
        Near line: ".endm"
        "/vol/gcc/src/hg/master/local/libffi/src/x86/win64.S", line 100 :
Illegal mnemonic
        Near line: " epilogue"
        "/vol/gcc/src/hg/master/local/libffi/src/x86/win64.S", line 100 :
Syntax error
        Near line: "epilogue"

Solaris as doesn't support .macro/.endm.

Fixed by using #define instead of the unportable .macro.

Tested on i386-pc-solaris2.11 and x86_64-pc-linux-gnu.

The bug has been reported upstream
(https://github.com/libffi/libffi/issues/665); a corresponding pull
request is also pending (https://github.com/libffi/libffi/pull/669).


2021-10-21  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	libffi:
	PR libffi/102874
	* src/x86/win64.S (epilogue): Use #define instead of .macro.
This commit is contained in:
Rainer Orth 2021-11-15 10:24:27 +01:00
parent a68933da01
commit a91f844ef4
1 changed files with 6 additions and 7 deletions
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13
libffi/src/x86/win64.S
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@ -85,14 +85,13 @@ C(ffi_call_win64):
/* Below, we're space constrained most of the time. Thus we eschew the
modern "mov, pop, ret" sequence (5 bytes) for "leave, ret" (2 bytes). */
.macro epilogue
leaveq
cfi_remember_state
cfi_def_cfa(%rsp, 8)
cfi_restore(%rbp)
ret
#define epilogue \
leaveq; \
cfi_remember_state; \
cfi_def_cfa(%rsp, 8); \
cfi_restore(%rbp); \
ret; \
cfi_restore_state
.endm
.align 8
0: