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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
Download patch file Download diff file Expand all files Collapse all files

86
libc/runtime/init.S
View file

@ -22,30 +22,30 @@
#include "libc/dce.h"
.source __FILE__
/ Decentralized function for process initialization.
/
/ Modules may inject cheap data structure initialization code into
/ this function using the .init.start and .init.end macros. That
/ code can use the LODS and STOS instructions to initialize memory
/ that's restricted to read-only after initialization by PIRO.
/
/ This is fast, since the linker is able to roll-up initialization
/ for large codebases comprised of many modules, into a perfectly
/ linear order. It also enables a common pattern we use, which we
/ call “Referencing Is Initialization” (RII).
/
/ C/C++ code should favor using ordinary constructors, since under
/ normal circumstances the compiler will clobber RDI and RSI which
/ are granted special meanings within this function.
/
/ @param r12 is argc (still callee saved)
/ @param r13 is argv (still callee saved)
/ @param r14 is envp (still callee saved)
/ @param r15 is envp (still callee saved)
/ @note rdi is __init_bss_start (callee monotonic lockstep)
/ @note rsi is __init_rodata_start (callee monotonic lockstep)
/ @see .init.start & .init.end (libc/macros.internal.inc)
/ @see ape/ape.lds
// Decentralized function for process initialization.
//
// Modules may inject cheap data structure initialization code into
// this function using the .init.start and .init.end macros. That
// code can use the LODS and STOS instructions to initialize memory
// that's restricted to read-only after initialization by PIRO.
//
// This is fast, since the linker is able to roll-up initialization
// for large codebases comprised of many modules, into a perfectly
// linear order. It also enables a common pattern we use, which we
// call “Referencing Is Initialization” (RII).
//
// C/C++ code should favor using ordinary constructors, since under
// normal circumstances the compiler will clobber RDI and RSI which
// are granted special meanings within this function.
//
// @param r12 is argc (still callee saved)
// @param r13 is argv (still callee saved)
// @param r14 is envp (still callee saved)
// @param r15 is envp (still callee saved)
// @note rdi is __init_bss_start (callee monotonic lockstep)
// @note rsi is __init_rodata_start (callee monotonic lockstep)
// @see .init.start & .init.end (libc/macros.internal.inc)
// @see ape/ape.lds
.section .initprologue,"ax",@progbits
.type _init,@function
.globl _init
@ -75,10 +75,10 @@ _woot: leave
ret
.previous
/ Decentralized section for packed data structures & initializers.
/
/ @see .initro (libc/macros.internal.inc)
/ @see ape/ape.lds
// Decentralized section for packed data structures & initializers.
//
// @see .initro (libc/macros.internal.inc)
// @see ape/ape.lds
.section .initroprologue,"a",@progbits
.type __init_rodata_start,@object
.type __init_rodata_end,@object
@ -95,13 +95,13 @@ __init_rodata_end:
.byte 0x90
.previous
/ Decentralized section for unpacked data structures.
/
/ Data in this section becomes read-only after initialization.
/
/ @see .piro.bss.init (libc/macros.internal.inc)
/ @see libc/runtime/piro.c
/ @see ape/ape.lds
// Decentralized section for unpacked data structures.
//
// Data in this section becomes read-only after initialization.
//
// @see .piro.bss.init (libc/macros.internal.inc)
// @see libc/runtime/piro.c
// @see ape/ape.lds
.section .piro.bss.init.1,"aw",@nobits
.type __init_bss_start,@object
.type __init_bss_end,@object
@ -118,14 +118,14 @@ __init_bss_end:
.byte 0
.previous
/ Special area for Windows NT support code.
/
/ Isolating this code adds value for Windows users by minimizing
/ page faults through improved locality. On System Five the PIRO
/ runtime can unmap these pages.
/
/ @see libc/runtime/piro.c
/ @see ape/ape.lds
// Special area for Windows NT support code.
//
// Isolating this code adds value for Windows users by minimizing
// page faults through improved locality. On System Five the PIRO
// runtime can unmap these pages.
//
// @see libc/runtime/piro.c
// @see ape/ape.lds
.section .textwindowsprologue,"ax",@progbits
.type __text_windows_start,@object
.type __text_windows_end,@object