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https://github.com/jart/cosmopolitan.git
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a15958edc6
Function trace logs will report stack usage accurately. It won't include the argv/environ block. Our clone() polyfill is now simpler and does not use as much stack memory. Function call tracing on x86 is now faster too
125 lines
3.6 KiB
ArmAsm
125 lines
3.6 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│ vi: set noet ft=asm ts=8 sw=8 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.privileged
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ftrace_hook:
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#ifdef __x86_64__
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// save argument registers
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// we save %rax because __gc() takes it as an argument.
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// we save %r10 because it's used as a syscall argument.
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cmpl $0,__ftrace(%rip)
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jle 1f
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push %rbp
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mov %rsp,%rbp
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and $-16,%rsp
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sub $128,%rsp
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movdqu %xmm0,-0x80(%rbp)
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movdqu %xmm1,-0x70(%rbp)
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movdqu %xmm2,-0x60(%rbp)
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movdqu %xmm3,-0x50(%rbp)
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movdqu %xmm4,-0x40(%rbp)
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movdqu %xmm5,-0x30(%rbp)
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movdqu %xmm6,-0x20(%rbp)
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movdqu %xmm7,-0x10(%rbp)
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push %rax
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push %rcx
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push %rdx
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push %rdi
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push %rsi
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push %r8
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push %r9
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push %r10
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call ftracer
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movdqu -0x80(%rbp),%xmm0
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movdqu -0x70(%rbp),%xmm1
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movdqu -0x60(%rbp),%xmm2
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movdqu -0x50(%rbp),%xmm3
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movdqu -0x40(%rbp),%xmm4
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movdqu -0x30(%rbp),%xmm5
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movdqu -0x20(%rbp),%xmm6
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movdqu -0x10(%rbp),%xmm7
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pop %r10
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pop %r9
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pop %r8
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pop %rsi
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pop %rdi
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pop %rdx
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pop %rcx
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pop %rax
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leave
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1: ret
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#elif defined(__aarch64__)
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stp x29,x30,[sp,-384]!
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mov x29,sp
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stp x0,x1,[sp,16]
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adrp x0,__ftrace
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ldr w0,[x0,#:lo12:__ftrace]
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cmp w0,0
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ble 1f
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stp x2,x3,[sp,32]
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stp x4,x5,[sp,48]
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stp x6,x7,[sp,64]
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stp x8,x9,[sp,80]
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stp x10,x11,[sp,96]
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stp x12,x13,[sp,112]
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stp x14,x15,[sp,128]
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stp x16,x19,[sp,160]
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stp x20,x21,[sp,176]
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stp x22,x23,[sp,192]
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stp x24,x25,[sp,208]
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stp x26,x27,[sp,224]
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stp x17,x28,[sp,240]
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stp q0,q1,[sp,256]
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stp q2,q3,[sp,288]
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stp q4,q5,[sp,320]
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stp q6,q7,[sp,352]
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bl ftracer
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ldp q6,q7,[sp,352]
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ldp q4,q5,[sp,320]
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ldp q2,q3,[sp,288]
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ldp q0,q1,[sp,256]
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ldp x17,x28,[sp,240]
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ldp x26,x27,[sp,224]
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ldp x24,x25,[sp,208]
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ldp x22,x23,[sp,192]
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ldp x20,x21,[sp,176]
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ldp x16,x19,[sp,160]
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ldp x14,x15,[sp,128]
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ldp x12,x13,[sp,112]
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ldp x10,x11,[sp,96]
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ldp x8,x9,[sp,80]
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ldp x6,x7,[sp,64]
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ldp x4,x5,[sp,48]
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ldp x2,x3,[sp,32]
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1: ldp x0,x1,[sp,16]
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ldp x29,x30,[sp],384
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ret
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#endif /* __x86_64__ */
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.endfn ftrace_hook,globl,hidden
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