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Get codebase completely working with LLVM

Browse Source 
You can now build Cosmopolitan with Clang:

    make -j8 MODE=llvm
    o/llvm/examples/hello.com

The assembler and linker code is now friendly to LLVM too.
So it's not needed to configure Clang to use binutils under
the hood. If you love LLVM then you can now use pure LLVM.
This commit is contained in:
Justine Tunney
2021-02-08 09:19:00 -08:00
parent 0e36cb3ac4
commit e75ffde09e
4528 changed files with 7776 additions and 11640 deletions
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30
libc/crt/crt.S
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@ -23,11 +23,11 @@
.section .start,"ax",@progbits
.align 16
/ System Five userspace program entrypoint.
/
/ @param rsp is [n,argv₀..argvₙ₋₁,0,envp₀..,0,auxv₀..,0,..]
/ @note FreeBSD is special (see freebsd/lib/csu/amd64/...)
/ @noreturn
// System Five userspace program entrypoint.
//
// @param rsp is [n,argv₀..argvₙ₋₁,0,envp₀..,0,auxv₀..,0,..]
// @note FreeBSD is special (see freebsd/lib/csu/amd64/...)
// @noreturn
_start:
#if SupportsFreebsd()
test %rdi,%rdi
@ -39,12 +39,12 @@ _start:
lea 8(%rsp),%rsi # argv
lea 24(%rsp,%rbx,8),%rdx # envp
.frame0
/ bofram 9f
.weak idata.iat
.weak idata.iatend
// bofram 9f
.weak ape_idata_iat
.weak ape_idata_iatend
ezlea missingno,ax # make win32 imps noop
ezlea idata.iat,di
ezlea idata.iatend,cx
ezlea ape_idata_iat,di
ezlea ape_idata_iatend,cx
sub %rdi,%rcx
shr $3,%ecx
rep stosq
@ -70,11 +70,11 @@ _start:
.endfn _start,weak,hidden
#if SupportsXnu()
/ Macintosh userspace program entrypoint.
/
/ @param rsp is [n,argv₀..argvₙ₋₁,0,envp₀..,0,auxv₀..,0,..]
/ @note FreeBSD is special (see freebsd/lib/csu/amd64/...)
/ @noreturn
// Macintosh userspace program entrypoint.
//
// @param rsp is [n,argv₀..argvₙ₋₁,0,envp₀..,0,auxv₀..,0,..]
// @note FreeBSD is special (see freebsd/lib/csu/amd64/...)
// @noreturn
_xnu: movb $XNU,__hostos(%rip)
jmp 0b
.endfn _xnu,weak,hidden