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re PR go/81393 (Bootstrap failure on s390x-linux while building libgo against recent glibc)

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PR go/81393
    syscall: don't use GETREGS/SETREGS on s390
    
    They were removed in recent glibc.
    
    Patch by Andreas Krebbel for GCC PR 81393.
    
    Reviewed-on: https://go-review.googlesource.com/48231

From-SVN: r250174
This commit is contained in:
Ian Lance Taylor 2017-07-13 03:44:14 +00:00
parent 258d772a7c
commit 6eecb29326
3 changed files with 46 additions and 7 deletions
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2
gcc/go/gofrontend/MERGE
View file

@ -1,4 +1,4 @@
12c65e8310956eb3cc412d9dc9f9e88cbd928c8e
9294e79fced202ade7eb236bbe78b766e7e0374f
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.

18
libgo/go/syscall/syscall_linux_s390.go
View file

@ -4,6 +4,8 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// See the s390x version for why we don't use GETREGSET/SETREGSET
package syscall
import "unsafe"
@ -12,10 +14,20 @@ func (r *PtraceRegs) PC() uint64 { return uint64(r.Psw.addr) }
func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.addr = uint32(pc) }
func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) {
return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout)))
func PtraceGetRegs(pid int, regs *PtraceRegs) (err error) {
parea := _ptrace_area{
_sizeof_ptrace_area,
0,
uint32(uintptr(unsafe.Pointer(regs))),
}
return ptrace(PTRACE_PEEKUSR_AREA, pid, uintptr(unsafe.Pointer(&parea)), 0)
}
func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs)))
parea := _ptrace_area{
_sizeof_ptrace_area,
0,
uint32(uintptr(unsafe.Pointer(regs))),
}
return ptrace(PTRACE_POKEUSR_AREA, pid, uintptr(unsafe.Pointer(&parea)), 0)
}

33
libgo/go/syscall/syscall_linux_s390x.go
View file

@ -4,6 +4,23 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// The PtraceRegs struct generated for go looks like this:
//
// type PtraceRegs struct
// {
// Psw _psw_t;
// Gprs [15+1]uint64;
// Acrs [15+1]uint32;
// Orig_gpr2 uint64;
// Fp_regs _s390_fp_regs;
// Per_info _per_struct;
// Ieee_instruction_pointer uint64;
// }
//
// The GETREGSET/SETREGSET ptrace commands on S/390 only read/write
// the content up to Orig_gpr2. Hence, we use
// PEEKUSR_AREA/POKEUSR_AREA like GDB does.
package syscall
import "unsafe"
@ -12,10 +29,20 @@ func (r *PtraceRegs) PC() uint64 { return r.Psw.addr }
func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.addr = pc }
func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) {
return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout)))
func PtraceGetRegs(pid int, regs *PtraceRegs) (err error) {
parea := _ptrace_area{
_sizeof_ptrace_area,
0,
uint64(uintptr(unsafe.Pointer(regs))),
}
return ptrace(PTRACE_PEEKUSR_AREA, pid, uintptr(unsafe.Pointer(&parea)), 0)
}
func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs)))
parea := _ptrace_area{
_sizeof_ptrace_area,
0,
uint64(uintptr(unsafe.Pointer(regs))),
}
return ptrace(PTRACE_POKEUSR_AREA, pid, uintptr(unsafe.Pointer(&parea)), 0)
}