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Merge pull request #21118 from alexrp/thread-porting

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`std.Thread`: Support hexagon, sparc32, s390x in `freeAndExit()`
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Andrew Kelley 2024-08-23 00:41:50 -07:00 committed by GitHub
commit 56119c2cbc
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1 changed files with 54 additions and 8 deletions
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62
lib/std/Thread.zig
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@ -1130,6 +1130,19 @@ const LinuxThreadImpl = struct {
[len] "r" (self.mapped.len),
: "memory"
),
.hexagon => asm volatile (
\\ r6 = #215 // SYS_munmap
\\ r0 = %[ptr]
\\ r1 = %[len]
\\ trap0(#1)
\\ r6 = #93 // SYS_exit
\\ r0 = #0
\\ trap0(#1)
:
: [ptr] "r" (@intFromPtr(self.mapped.ptr)),
[len] "r" (self.mapped.len),
: "memory"
),
// We set `sp` to the address of the current function as a workaround for a Linux
// kernel bug that caused syscalls to return EFAULT if the stack pointer is invalid.
// The bug was introduced in 46e12c07b3b9603c60fc1d421ff18618241cb081 and fixed in
@ -1188,18 +1201,51 @@ const LinuxThreadImpl = struct {
[len] "r" (self.mapped.len),
: "memory"
),
.sparc64 => asm volatile (
\\ # SPARCs really don't like it when active stack frames
\\ # is unmapped (it will result in a segfault), so we
\\ # force-deactivate it by running `restore` until
\\ # all frames are cleared.
\\ 1:
.s390x => asm volatile (
\\ lgr %%r2, %[ptr]
\\ lgr %%r3, %[len]
\\ svc 91 # SYS_munmap
\\ lghi %%r2, 0
\\ svc 1 # SYS_exit
:
: [ptr] "r" (@intFromPtr(self.mapped.ptr)),
[len] "r" (self.mapped.len),
: "memory"
),
.sparc => asm volatile (
\\ # See sparc64 comments below.
\\ 1:
\\ cmp %%fp, 0
\\ beq 2f
\\ nop
\\ ba 1b
\\ restore
\\ 2:
\\ 2:
\\ mov 73, %%g1 # SYS_munmap
\\ mov %[ptr], %%o0
\\ mov %[len], %%o1
\\ t 0x3 # ST_FLUSH_WINDOWS
\\ t 0x10
\\ mov 1, %%g1 # SYS_exit
\\ mov 0, %%o0
\\ t 0x10
:
: [ptr] "r" (@intFromPtr(self.mapped.ptr)),
[len] "r" (self.mapped.len),
: "memory"
),
.sparc64 => asm volatile (
\\ # SPARCs really don't like it when active stack frames
\\ # is unmapped (it will result in a segfault), so we
\\ # force-deactivate it by running `restore` until
\\ # all frames are cleared.
\\ 1:
\\ cmp %%fp, 0
\\ beq 2f
\\ nop
\\ ba 1b
\\ restore
\\ 2:
\\ mov 73, %%g1 # SYS_munmap
\\ mov %[ptr], %%o0
\\ mov %[len], %%o1
@ -1208,7 +1254,7 @@ const LinuxThreadImpl = struct {
\\ flushw
\\ t 0x6d
\\ mov 1, %%g1 # SYS_exit
\\ mov 1, %%o0
\\ mov 0, %%o0
\\ t 0x6d
:
: [ptr] "r" (@intFromPtr(self.mapped.ptr)),