qbit/go
1
0
Fork 0
mirror of https://github.com/golang/go synced 2024-11-23 14:20:05 -07:00
Code Releases Activity

runtime: use explicit NOFRAME on darwin/amd64

Browse Source 
This CL marks some darwin assembly functions as NOFRAME to avoid relying
on the implicit amd64 NOFRAME heuristic, where NOSPLIT functions
without stack were also marked as NOFRAME.

Change-Id: I797f3909bcf7f7aad304e4ede820c884231e54f6
Reviewed-on: https://go-review.googlesource.com/c/go/+/460235
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
qmuntal 2023-01-02 15:54:44 +01:00 committed by Quim Muntal
parent 89de906aa2
commit cea70301e2
2 changed files with 15 additions and 160 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/cmd/internal/obj/x86/obj6.go
View File

@ -614,14 +614,14 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) {
var bpsize int
if ctxt.Arch.Family == sys.AMD64 &&
!p.From.Sym.NoFrame() && // (1) below
!(autoffset == 0 && p.From.Sym.NoSplit() && ctxt.Headtype != objabi.Hwindows) && // (2) below
!(autoffset == 0 && p.From.Sym.NoSplit() && ctxt.Headtype != objabi.Hwindows && ctxt.Headtype != objabi.Hdarwin) && // (2) below
!(autoffset == 0 && !hasCall) { // (3) below
// Make room to save a base pointer.
// There are 2 cases we must avoid:
// 1) If noframe is set (which we do for functions which tail call).
// 2) Scary runtime internals which would be all messed up by frame pointers.
// We detect these using a heuristic: frameless nosplit functions.
// Windows does not use this heuristic anymore.
// Windows and Darwin do not use this heuristic anymore.
// TODO: Maybe someday we label them all with NOFRAME and get rid of this heuristic.
// For performance, we also want to avoid:
// 3) Frameless leaf functions

171
src/runtime/sys_darwin_amd64.s
View File

@ -15,36 +15,25 @@
// Exit the entire program (like C exit)
TEXT runtime·exit_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVL 0(DI), DI // arg 1 exit status
CALL libc_exit(SB)
MOVL $0xf1, 0xf1 // crash
POPQ BP
RET
TEXT runtime·open_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVL 8(DI), SI // arg 2 flags
MOVL 12(DI), DX // arg 3 mode
MOVQ 0(DI), DI // arg 1 pathname
XORL AX, AX // vararg: say "no float args"
CALL libc_open(SB)
POPQ BP
RET
TEXT runtime·close_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVL 0(DI), DI // arg 1 fd
CALL libc_close(SB)
POPQ BP
RET
TEXT runtime·read_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 buf
MOVL 16(DI), DX // arg 3 count
MOVL 0(DI), DI // arg 1 fd
@ -55,12 +44,9 @@ TEXT runtime·read_trampoline(SB),NOSPLIT,$0
MOVL (AX), AX
NEGL AX // caller expects negative errno value
noerr:
POPQ BP
RET
TEXT runtime·write_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 buf
MOVL 16(DI), DX // arg 3 count
MOVQ 0(DI), DI // arg 1 fd
@ -71,39 +57,29 @@ TEXT runtime·write_trampoline(SB),NOSPLIT,$0
MOVL (AX), AX
NEGL AX // caller expects negative errno value
noerr:
POPQ BP
RET
TEXT runtime·pipe_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
CALL libc_pipe(SB) // pointer already in DI
TESTL AX, AX
JEQ 3(PC)
CALL libc_error(SB) // return negative errno value
NEGL AX
POPQ BP
RET
TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 new
MOVQ 16(DI), DX // arg 3 old
MOVL 0(DI), DI // arg 1 which
CALL libc_setitimer(SB)
POPQ BP
RET
TEXT runtime·madvise_trampoline(SB), NOSPLIT, $0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 len
MOVL 16(DI), DX // arg 3 advice
MOVQ 0(DI), DI // arg 1 addr
CALL libc_madvise(SB)
// ignore failure - maybe pages are locked
POPQ BP
RET
TEXT runtime·mlock_trampoline(SB), NOSPLIT, $0
@ -112,8 +88,6 @@ TEXT runtime·mlock_trampoline(SB), NOSPLIT, $0
GLOBL timebase<>(SB),NOPTR,$(machTimebaseInfo__size)
TEXT runtime·nanotime_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ DI, BX
CALL libc_mach_absolute_time(SB)
MOVQ AX, 0(BX)
@ -137,21 +111,15 @@ initialized:
MOVL SI, 8(BX)
MOVL DI, 12(BX)
MOVQ BP, SP
POPQ BP
RET
TEXT runtime·walltime_trampoline(SB),NOSPLIT,$0
PUSHQ BP // make a frame; keep stack aligned
MOVQ SP, BP
MOVQ DI, SI // arg 2 timespec
MOVL $CLOCK_REALTIME, DI // arg 1 clock_id
CALL libc_clock_gettime(SB)
POPQ BP
RET
TEXT runtime·sigaction_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 new
MOVQ 16(DI), DX // arg 3 old
MOVL 0(DI), DI // arg 1 sig
@ -159,12 +127,9 @@ TEXT runtime·sigaction_trampoline(SB),NOSPLIT,$0
TESTL AX, AX
JEQ 2(PC)
MOVL $0xf1, 0xf1 // crash
POPQ BP
RET
TEXT runtime·sigprocmask_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 new
MOVQ 16(DI), DX // arg 3 old
MOVL 0(DI), DI // arg 1 how
@ -172,33 +137,26 @@ TEXT runtime·sigprocmask_trampoline(SB),NOSPLIT,$0
TESTL AX, AX
JEQ 2(PC)
MOVL $0xf1, 0xf1 // crash
POPQ BP
RET
TEXT runtime·sigaltstack_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 old
MOVQ 0(DI), DI // arg 1 new
CALL libc_sigaltstack(SB)
TESTQ AX, AX
JEQ 2(PC)
MOVL $0xf1, 0xf1 // crash
POPQ BP
RET
TEXT runtime·raiseproc_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVL 0(DI), BX // signal
CALL libc_getpid(SB)
MOVL AX, DI // arg 1 pid
MOVL BX, SI // arg 2 signal
CALL libc_kill(SB)
POPQ BP
RET
TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
TEXT runtime·sigfwd(SB),NOSPLIT|NOFRAME,$0-32
MOVQ fn+0(FP), AX
MOVL sig+8(FP), DI
MOVQ info+16(FP), SI
@ -214,7 +172,7 @@ TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
// This is the function registered during sigaction and is invoked when
// a signal is received. It just redirects to the Go function sigtrampgo.
// Called using C ABI.
TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$0
TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME|NOFRAME,$0
// Transition from C ABI to Go ABI.
PUSH_REGS_HOST_TO_ABI0()
@ -239,7 +197,7 @@ TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$0
RET
// Called using C ABI.
TEXT runtime·sigprofNonGoWrapper<>(SB),NOSPLIT,$0
TEXT runtime·sigprofNonGoWrapper<>(SB),NOSPLIT|NOFRAME,$0
// Transition from C ABI to Go ABI.
PUSH_REGS_HOST_TO_ABI0()
@ -257,7 +215,7 @@ TEXT runtime·sigprofNonGoWrapper<>(SB),NOSPLIT,$0
// Used instead of sigtramp in programs that use cgo.
// Arguments from kernel are in DI, SI, DX.
TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0
TEXT runtime·cgoSigtramp(SB),NOSPLIT|NOFRAME,$0
// If no traceback function, do usual sigtramp.
MOVQ runtime·cgoTraceback(SB), AX
TESTQ AX, AX
@ -332,8 +290,6 @@ sigtrampnog:
JMP AX
TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0
PUSHQ BP // make a frame; keep stack aligned
MOVQ SP, BP
MOVQ DI, BX
MOVQ 0(BX), DI // arg 1 addr
MOVQ 8(BX), SI // arg 2 len
@ -351,27 +307,20 @@ TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0
ok:
MOVQ AX, 32(BX)
MOVQ DX, 40(BX)
POPQ BP
RET
TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 len
MOVQ 0(DI), DI // arg 1 addr
CALL libc_munmap(SB)
TESTQ AX, AX
JEQ 2(PC)
MOVL $0xf1, 0xf1 // crash
POPQ BP
RET
TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVL 0(DI), DI // arg 1 usec
CALL libc_usleep(SB)
POPQ BP
RET
TEXT runtime·settls(SB),NOSPLIT,$32
@ -379,8 +328,6 @@ TEXT runtime·settls(SB),NOSPLIT,$32
RET
TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVL 8(DI), SI // arg 2 miblen
MOVQ 16(DI), DX // arg 3 oldp
MOVQ 24(DI), CX // arg 4 oldlenp
@ -388,31 +335,22 @@ TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0
MOVQ 40(DI), R9 // arg 6 newlen
MOVQ 0(DI), DI // arg 1 mib
CALL libc_sysctl(SB)
POPQ BP
RET
TEXT runtime·sysctlbyname_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 oldp
MOVQ 16(DI), DX // arg 3 oldlenp
MOVQ 24(DI), CX // arg 4 newp
MOVQ 32(DI), R8 // arg 5 newlen
MOVQ 0(DI), DI // arg 1 name
CALL libc_sysctlbyname(SB)
POPQ BP
RET
TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
CALL libc_kqueue(SB)
POPQ BP
RET
TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 keventt
MOVL 16(DI), DX // arg 3 nch
MOVQ 24(DI), CX // arg 4 ev
@ -426,24 +364,20 @@ TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0
MOVLQSX (AX), AX // errno
NEGQ AX // caller wants it as a negative error code
ok:
POPQ BP
RET
TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVL 4(DI), SI // arg 2 cmd
MOVL 8(DI), DX // arg 3 arg
MOVL 0(DI), DI // arg 1 fd
XORL AX, AX // vararg: say "no float args"
CALL libc_fcntl(SB)
POPQ BP
RET
// mstart_stub is the first function executed on a new thread started by pthread_create.
// It just does some low-level setup and then calls mstart.
// Note: called with the C calling convention.
TEXT runtime·mstart_stub(SB),NOSPLIT,$0
TEXT runtime·mstart_stub(SB),NOSPLIT|NOFRAME,$0
// DI points to the m.
// We are already on m's g0 stack.
@ -472,129 +406,85 @@ TEXT runtime·mstart_stub(SB),NOSPLIT,$0
// A single int32 result is returned in AX.
// (For more results, make an args/results structure.)
TEXT runtime·pthread_attr_init_trampoline(SB),NOSPLIT,$0
PUSHQ BP // make frame, keep stack 16-byte aligned.
MOVQ SP, BP
MOVQ 0(DI), DI // arg 1 attr
CALL libc_pthread_attr_init(SB)
POPQ BP
RET
TEXT runtime·pthread_attr_getstacksize_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 size
MOVQ 0(DI), DI // arg 1 attr
CALL libc_pthread_attr_getstacksize(SB)
POPQ BP
RET
TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 state
MOVQ 0(DI), DI // arg 1 attr
CALL libc_pthread_attr_setdetachstate(SB)
POPQ BP
RET
TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
SUBQ $16, SP
TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$16
MOVQ 0(DI), SI // arg 2 attr
MOVQ 8(DI), DX // arg 3 start
MOVQ 16(DI), CX // arg 4 arg
MOVQ SP, DI // arg 1 &threadid (which we throw away)
CALL libc_pthread_create(SB)
MOVQ BP, SP
POPQ BP
RET
TEXT runtime·raise_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVL 0(DI), DI // arg 1 signal
CALL libc_raise(SB)
POPQ BP
RET
TEXT runtime·pthread_mutex_init_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 attr
MOVQ 0(DI), DI // arg 1 mutex
CALL libc_pthread_mutex_init(SB)
POPQ BP
RET
TEXT runtime·pthread_mutex_lock_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 0(DI), DI // arg 1 mutex
CALL libc_pthread_mutex_lock(SB)
POPQ BP
RET
TEXT runtime·pthread_mutex_unlock_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 0(DI), DI // arg 1 mutex
CALL libc_pthread_mutex_unlock(SB)
POPQ BP
RET
TEXT runtime·pthread_cond_init_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 attr
MOVQ 0(DI), DI // arg 1 cond
CALL libc_pthread_cond_init(SB)
POPQ BP
RET
TEXT runtime·pthread_cond_wait_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 mutex
MOVQ 0(DI), DI // arg 1 cond
CALL libc_pthread_cond_wait(SB)
POPQ BP
RET
TEXT runtime·pthread_cond_timedwait_relative_np_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 mutex
MOVQ 16(DI), DX // arg 3 timeout
MOVQ 0(DI), DI // arg 1 cond
CALL libc_pthread_cond_timedwait_relative_np(SB)
POPQ BP
RET
TEXT runtime·pthread_cond_signal_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 0(DI), DI // arg 1 cond
CALL libc_pthread_cond_signal(SB)
POPQ BP
RET
TEXT runtime·pthread_self_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ DI, BX // BX is caller-save
CALL libc_pthread_self(SB)
MOVQ AX, 0(BX) // return value
POPQ BP
RET
TEXT runtime·pthread_kill_trampoline(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
MOVQ 8(DI), SI // arg 2 sig
MOVQ 0(DI), DI // arg 1 thread
CALL libc_pthread_kill(SB)
POPQ BP
RET
TEXT runtime·osinit_hack_trampoline(SB),NOSPLIT,$0
@ -622,10 +512,7 @@ TEXT runtime·osinit_hack_trampoline(SB),NOSPLIT,$0
//
// syscall expects a 32-bit result and tests for 32-bit -1
// to decide there was an error.
TEXT runtime·syscall(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
SUBQ $16, SP
TEXT runtime·syscall(SB),NOSPLIT,$16
MOVQ (0*8)(DI), CX // fn
MOVQ (2*8)(DI), SI // a2
MOVQ (3*8)(DI), DX // a3
@ -652,8 +539,6 @@ TEXT runtime·syscall(SB),NOSPLIT,$0
ok:
XORL AX, AX // no error (it's ignored anyway)
MOVQ BP, SP
POPQ BP
RET
// syscallX calls a function in libc on behalf of the syscall package.
@ -672,10 +557,7 @@ ok:
//
// syscallX is like syscall but expects a 64-bit result
// and tests for 64-bit -1 to decide there was an error.
TEXT runtime·syscallX(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
SUBQ $16, SP
TEXT runtime·syscallX(SB),NOSPLIT,$16
MOVQ (0*8)(DI), CX // fn
MOVQ (2*8)(DI), SI // a2
MOVQ (3*8)(DI), DX // a3
@ -702,16 +584,11 @@ TEXT runtime·syscallX(SB),NOSPLIT,$0
ok:
XORL AX, AX // no error (it's ignored anyway)
MOVQ BP, SP
POPQ BP
RET
// syscallPtr is like syscallX except that the libc function reports an
// error by returning NULL and setting errno.
TEXT runtime·syscallPtr(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
SUBQ $16, SP
TEXT runtime·syscallPtr(SB),NOSPLIT,$16
MOVQ (0*8)(DI), CX // fn
MOVQ (2*8)(DI), SI // a2
MOVQ (3*8)(DI), DX // a3
@ -738,8 +615,6 @@ TEXT runtime·syscallPtr(SB),NOSPLIT,$0
ok:
XORL AX, AX // no error (it's ignored anyway)
MOVQ BP, SP
POPQ BP
RET
// syscall6 calls a function in libc on behalf of the syscall package.
@ -761,10 +636,7 @@ ok:
//
// syscall6 expects a 32-bit result and tests for 32-bit -1
// to decide there was an error.
TEXT runtime·syscall6(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
SUBQ $16, SP
TEXT runtime·syscall6(SB),NOSPLIT,$16
MOVQ (0*8)(DI), R11// fn
MOVQ (2*8)(DI), SI // a2
MOVQ (3*8)(DI), DX // a3
@ -791,8 +663,6 @@ TEXT runtime·syscall6(SB),NOSPLIT,$0
ok:
XORL AX, AX // no error (it's ignored anyway)
MOVQ BP, SP
POPQ BP
RET
// syscall6X calls a function in libc on behalf of the syscall package.
@ -814,10 +684,7 @@ ok:
//
// syscall6X is like syscall6 but expects a 64-bit result
// and tests for 64-bit -1 to decide there was an error.
TEXT runtime·syscall6X(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
SUBQ $16, SP
TEXT runtime·syscall6X(SB),NOSPLIT,$16
MOVQ (0*8)(DI), R11// fn
MOVQ (2*8)(DI), SI // a2
MOVQ (3*8)(DI), DX // a3
@ -844,8 +711,6 @@ TEXT runtime·syscall6X(SB),NOSPLIT,$0
ok:
XORL AX, AX // no error (it's ignored anyway)
MOVQ BP, SP
POPQ BP
RET
// syscall9 calls a function in libc on behalf of the syscall package.
@ -870,10 +735,7 @@ ok:
//
// syscall9 expects a 32-bit result and tests for 32-bit -1
// to decide there was an error.
TEXT runtime·syscall9(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
SUBQ $16, SP
TEXT runtime·syscall9(SB),NOSPLIT,$16
MOVQ (0*8)(DI), R13// fn
MOVQ (2*8)(DI), SI // a2
MOVQ (3*8)(DI), DX // a3
@ -903,17 +765,12 @@ TEXT runtime·syscall9(SB),NOSPLIT,$0
ok:
XORL AX, AX // no error (it's ignored anyway)
MOVQ BP, SP
POPQ BP
RET
// syscall_x509 is for crypto/x509. It is like syscall6 but does not check for errors,
// takes 5 uintptrs and 1 float64, and only returns one value,
// for use with standard C ABI functions.
TEXT runtime·syscall_x509(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
SUBQ $16, SP
TEXT runtime·syscall_x509(SB),NOSPLIT,$16
MOVQ (0*8)(DI), R11// fn
MOVQ (2*8)(DI), SI // a2
MOVQ (3*8)(DI), DX // a3
@ -930,6 +787,4 @@ TEXT runtime·syscall_x509(SB),NOSPLIT,$0
MOVQ AX, (7*8)(DI) // r1
XORL AX, AX // no error (it's ignored anyway)
MOVQ BP, SP
POPQ BP
RET