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Additional fixes for llvm-as

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Unlike GCC, llvm always uses an integrated assembler, which attempts to
recognized all `asm` statements written in the C code. glibc uses some
syntactically invalid asm statements to emit constants into assembly that
are later extracted with a sed or AWK script.

This change fixes two such invalid `asm` statements by wrapping the
output in a `.ascii` directive.. This does not break the sed/AWK (the same
special sequence is output) but it makes the statement syntactically valid.

See cf8e3f8757 for a previous fix for the same issue.
This commit is contained in:
Josh Kunz 2020-01-23 17:37:14 -08:00 committed by Fangrui Song
parent 144448d566
commit cb90884046
2 changed files with 2 additions and 2 deletions
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2
sysdeps/gnu/errlist.awk
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@ -105,6 +105,6 @@ END {
print "";
print "#ifdef EMIT_ERR_MAX";
print "void dummy (void)"
print "{ asm volatile (\" @@@ %0 @@@ \" : : \"i\" (ERR_REMAP (ERR_MAX))); }"
print "{ asm volatile (\".ascii \\\" @@@ %0 @@@ \\\"\" : : \"i\" (ERR_REMAP (ERR_MAX))); }"
print "#endif";
}

2
sysdeps/gnu/errlist.c
View File

@ -1478,5 +1478,5 @@ const int _sys_nerr_internal = NERR;
#ifdef EMIT_ERR_MAX
void dummy (void)
{ asm volatile (" @@@ %0 @@@ " : : "i" (ERR_REMAP (ERR_MAX))); }
{ asm volatile (".ascii \" @@@ %0 @@@ \"" : : "i" (ERR_REMAP (ERR_MAX))); }
#endif