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cosmopolitan/libc/nexgen32e/gclongjmp.S

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Polish up repository and other revisions
2020-06-16 13:38:43 +00:00
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
flip et / noet in modelines `et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
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│ vi: set noet ft=asm ts=8 sw=8 fenc=utf-8 :vi │
Initial import
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╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
Change license
2020-12-28 01:18:44 +00:00
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
Initial import
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│ │
Change license
2020-12-28 01:18:44 +00:00
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
Initial import
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╚─────────────────────────────────────────────────────────────────────────────*/
Remove more nonstandard stuff from cosmopolitan.h Fixes #61
2021-03-01 07:42:35 +00:00
#include "libc/macros.internal.h"
Initial import
2020-06-15 14:18:57 +00:00
Get codebase completely working with LLVM 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.
2021-02-08 17:19:00 +00:00
// Jumps up stack to previous setjmp() invocation.
//
// This is the same as longjmp() but also unwinds the stack to free
// memory, etc. that was registered using gc() or defer(). If GC
// isn't linked, this behaves the same as longjmp().
//
// @param rdi points to the jmp_buf which must be the same stack
// @param esi is returned by setjmp() invocation (coerced nonzero)
// @assume system five nexgen32e abi conformant
// @see examples/ctrlc.c
// @noreturn
Get --ftrace working on aarch64 This change implements a new approach to function call logging, that's based on the GCC flag: -fpatchable-function-entry. Read the commentary in build/config.mk to learn how it works.
2023-06-06 06:35:31 +00:00
.ftrace1
Bring back gc() function Renaming gc() to _gc() was a mistake since the better thing to do is put it behind the _COSMO_SOURCE macro. We need this change because I haven't wanted to use my amazing garbage collector ever since we renamed it. You now need to define _COSMO_SOURCE yourself when using amalgamation header and cosmocc users need to pass the -mcosmo flag to get the gc() function Some other issues relating to cancelation have been fixed along the way. We're also now putting cosmocc in a folder named `.cosmocc` so it can be more safely excluded by grep --exclude-dir=.cosmocc --exclude-dir=o etc.
2024-01-08 18:07:35 +00:00
gclongjmp:
Get --ftrace working on aarch64 This change implements a new approach to function call logging, that's based on the GCC flag: -fpatchable-function-entry. Read the commentary in build/config.mk to learn how it works.
2023-06-06 06:35:31 +00:00
.ftrace2
Make considerably more progress on AARCH64 - Utilities like pledge.com now build - kprintf() will no longer balk at 48-bit addresses - There's a new aarch64-dbg build mode that should work - gc() and defer() are mostly pacified; avoid using them on aarch64 - THIRD_PART_STB now has Arm Neon intrinsics for fast image handling
2023-05-13 05:42:57 +00:00
#ifdef __x86_64__
Fix regression in _gclongjmp()
2021-08-19 15:30:00 +00:00
push %rbp
mov %rsp,%rbp
Get garbage collector working on aarch64 Garbage collection will now happen on arm64 when a function returns, rather than kicking the can down the road to when the process exits. This change also does some code cleanup and incorporates suggestions
2023-06-07 10:34:45 +00:00
mov %fs:0,%r12 // __get_tls()
mov 0x18(%r12),%r12 // Tls::garbages
Make garbage collection thread safe - You can now use _gc(malloc()) in multithreaded programs - This change fixes a bug where fork() on NT disabled TLS - Fixed TLS code morphing on XNU/NT, for R8-R15 registers
2022-09-08 09:33:01 +00:00
test %r12,%r12
jz 0f
Get garbage collector working on aarch64 Garbage collection will now happen on arm64 when a function returns, rather than kicking the can down the road to when the process exits. This change also does some code cleanup and incorporates suggestions
2023-06-07 10:34:45 +00:00
movl (%r12),%r13d // garbages.i
Make garbage collection thread safe - You can now use _gc(malloc()) in multithreaded programs - This change fixes a bug where fork() on NT disabled TLS - Fixed TLS code morphing on XNU/NT, for R8-R15 registers
2022-09-08 09:33:01 +00:00
test %r13d,%r13d
Initial import
2020-06-15 14:18:57 +00:00
jnz .L.unwind.destructors
0: jmp longjmp
.L.unwind.destructors:
push %rdi
push %rsi
Get garbage collector working on aarch64 Garbage collection will now happen on arm64 when a function returns, rather than kicking the can down the road to when the process exits. This change also does some code cleanup and incorporates suggestions
2023-06-07 10:34:45 +00:00
mov 8(%r12),%r14 // garbages.p
mov (%rdi),%r15 // jmp_buf[0] is new %rsp
shl $5,%r13 // log2(sizeof(struct Garbage))
1: sub $32,%r13 // 𝑖--
Fix regression in _gclongjmp()
2021-08-19 15:30:00 +00:00
js 2f
Get garbage collector working on aarch64 Garbage collection will now happen on arm64 when a function returns, rather than kicking the can down the road to when the process exits. This change also does some code cleanup and incorporates suggestions
2023-06-07 10:34:45 +00:00
cmp (%r14,%r13),%r15 // new %rsp > garbages.p[𝑖].frame
Fix regression in _gclongjmp()
2021-08-19 15:30:00 +00:00
jbe 2f
Get garbage collector working on aarch64 Garbage collection will now happen on arm64 when a function returns, rather than kicking the can down the road to when the process exits. This change also does some code cleanup and incorporates suggestions
2023-06-07 10:34:45 +00:00
mov 16(%r14,%r13),%rdi // garbages.p[𝑖].arg
callq *8(%r14,%r13) // garbages.p[𝑖].fn
decl (%r12) // garbages.i--
Initial import
2020-06-15 14:18:57 +00:00
jmp 1b
2: pop %rsi
pop %rdi
jmp 0b
Make considerably more progress on AARCH64 - Utilities like pledge.com now build - kprintf() will no longer balk at 48-bit addresses - There's a new aarch64-dbg build mode that should work - gc() and defer() are mostly pacified; avoid using them on aarch64 - THIRD_PART_STB now has Arm Neon intrinsics for fast image handling
2023-05-13 05:42:57 +00:00
#elif defined(__aarch64__)
b longjmp
#else
#error "unsupported architecture"
#endif /* __x86_64__ */
Bring back gc() function Renaming gc() to _gc() was a mistake since the better thing to do is put it behind the _COSMO_SOURCE macro. We need this change because I haven't wanted to use my amazing garbage collector ever since we renamed it. You now need to define _COSMO_SOURCE yourself when using amalgamation header and cosmocc users need to pass the -mcosmo flag to get the gc() function Some other issues relating to cancelation have been fixed along the way. We're also now putting cosmocc in a folder named `.cosmocc` so it can be more safely excluded by grep --exclude-dir=.cosmocc --exclude-dir=o etc.
2024-01-08 18:07:35 +00:00
.endfn gclongjmp,globl
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