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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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32
libc/runtime/vfork.S
View file

@ -20,20 +20,20 @@
#include "libc/macros.h"
.privileged
/ Forks process without copying page tables.
/
/ This is the same as fork() except it's optimized for the case
/ where the caller invokes execve() immediately afterwards. You
/ can also call functions like close(), dup2(), etc. You cannot
/ call read() safely but you can call pread(). Call _exit() but
/ don't call exit(). Look for the vforksafe function annotation
/
/ Do not make the assumption that the parent is suspended until
/ the child terminates since this impl calls fork() on Windows.
/
/ @return pid of child process or 0 if forked process
/ @returnstwice
/ @vforksafe
// Forks process without copying page tables.
//
// This is the same as fork() except it's optimized for the case
// where the caller invokes execve() immediately afterwards. You
// can also call functions like close(), dup2(), etc. You cannot
// call read() safely but you can call pread(). Call _exit() but
// don't call exit(). Look for the vforksafe function annotation
//
// Do not make the assumption that the parent is suspended until
// the child terminates since this impl calls fork() on Windows.
//
// @return pid of child process or 0 if forked process
// @returnstwice
// @vforksafe
vfork:
#if SupportsWindows()
testb IsWindows()
@ -48,7 +48,7 @@ vfork:
syscall
push %rsi # note it happens twice in same page
cmp $-4095,%eax
jae systemfive.error
jae systemfive_error
0: ezlea __vforked,di
test %eax,%eax
jz 1f
@ -62,7 +62,7 @@ vfork:
vfork.bsd:
syscall
push %rsi
jc systemfive.errno
jc systemfive_errno
#if SupportsXnu()
testb IsXnu()
jz 0b