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Implement thread cancellation for aarch64

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Justine Tunney 2023-09-07 08:29:16 -07:00
parent dcda6f7d8d
commit 032b1f3449
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GPG key ID: BE714B4575D6E328
54 changed files with 297 additions and 167 deletions
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56
libc/sysv/macros.internal.h
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@ -35,62 +35,12 @@
.endif
.endfn \name,\kw1,\kw2
#elif defined(__aarch64__)
.ifc \arm_linux,4095
.ifc \arm_xnu,4095
// return enosys();
.ftrace1
\name: .ftrace2
b enosys
mov x8,#\arm_linux
mov x16,#\arm_xnu
b systemfive
.endfn \name,\kw1,\kw2
.else
// return IsXnu() ? syscall(x16, ...) : syscall(x8, ...);
.ftrace1
\name: .ftrace2
adrp x9,__hostos
ldr w9,[x9,#:lo12:__hostos]
tbz x9,#3,1f // !IsXnu()
mov x16,#\arm_xnu // apple ordinal
mov x9,#0 // clear carry flag
adds x9,x9,#0 // clear carry flag
svc #0 // issue system call
bcs 1f
b _sysret
1: neg x0,x0
b _sysret
.hidden _sysret
.endfn \name,\kw1,\kw2
.endif
.else
.ifc \arm_xnu,4095
// return IsLinux() ? syscall(x8, ...) : enosys();
.ftrace1
\name: .ftrace2
adrp x9,__hostos
ldr w9,[x9,#:lo12:__hostos]
tbz x9,#0,1f // !IsLinux()
mov x8,#\arm_linux // systemd ordinal
svc #0 // issue system call
mov x1,#\arm_linux
b _sysret
.hidden _sysret
1: b enosys
.endfn \name,\kw1,\kw2
.else
.ftrace1
\name: .ftrace2
mov x16,#\arm_xnu // apple ordinal
mov x8,#\arm_linux // systemd ordinal
mov x9,#0 // clear carry flag
adds x9,x9,#0 // clear carry flag
svc #0 // issue system call
bcs 1f
b _sysret
1: neg x0,x0
b _sysret
.hidden _sysret
.endfn \name,\kw1,\kw2
.endif
.endif
#else
#error "architecture unsupported"
#endif