syscall: don't use GETREGS/SETREGS on s390
They were removed in recent glibc.
Patch by Andreas Krebbel for GCC PR 81393.
Change-Id: I87be375b9cf760b87aa369ad46cf43831a287a08
Reviewed-on: https://go-review.googlesource.com/48231
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/libgo/go/syscall/syscall_linux_s390.go b/libgo/go/syscall/syscall_linux_s390.go
index d6d3f6a..8b00542 100644
--- a/libgo/go/syscall/syscall_linux_s390.go
+++ b/libgo/go/syscall/syscall_linux_s390.go
@@ -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) 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)
}
diff --git a/libgo/go/syscall/syscall_linux_s390x.go b/libgo/go/syscall/syscall_linux_s390x.go
index f3701dc..1767a6e 100644
--- a/libgo/go/syscall/syscall_linux_s390x.go
+++ b/libgo/go/syscall/syscall_linux_s390x.go
@@ -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) 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)
}
