Commit graph

5 commits

Author SHA1 Message Date
Andrei Borzenkov
a0bf403f66 asm-tests/i386-pc: Check that movl is 5 bytes.
LLVM 3.9 now emits short form of jump instructions, but it is still using
32 bit addresses for some movl instructions. Fortunately it was caught early:

clang ... boot/i386/pc/boot.S
clang -cc1as: fatal error: error in backend: invalid .org offset '440' (at offset '441')

Add additional check to catch it during configure run and force -no-integrated-as.

Closes: 49200

More details in
  https://lists.gnu.org/archive/html/grub-devel/2015-02/msg00099.html
  https://llvm.org/bugs/show_bug.cgi?id=22662
2016-09-28 20:31:04 +03:00
Vladimir Serbinenko
323ef2bdc3 asm-tests/i386-pc: Check that near jumps are 2 bytes.
We already check that jump over 300 bytes gap is 3 bytes in code16-mode.
Some clang versions generate 3-byte opcode for short jumps which makes
boot.img blow over 512-byte limit. Enforce -no-integrated-as in such cases
2015-11-11 18:14:25 +00:00
Vladimir Serbinenko
285540e448 mips: Make the assembly-code N32-compatible.
There are no $t4 or $t5 in N32 but there are $a4 and $a5.
2015-10-11 13:20:26 +02:00
Vladimir Serbinenko
f16b8c0405 Relax requirements on asm for non-BIOS i386 platforms.
These platforms don't have a hard limit on size of resulting code16
code, so we don't care if assembly is bigger than necessarry.
2015-02-21 20:18:18 +01:00
Vladimir Serbinenko
065ad910f1 Test which flags make our asm compile.
Previously we relied on assumption that clang always needs -no-integrated-as
but it's not always true.
2015-02-21 16:29:28 +01:00