delve/pkg/proc/native/threads_linux_ppc64le.go
Archana Ravindar ebc3e61367
pky/proc: enable function call injection in Delve for linux/ppc64le (#3449)
* enable func call injection on delve for ppc64le

* Function call injection on Delve/ppc64le, modified DWARF encoding and decoding for floating point registers to make floatsum test work

* Function call injection on Delve/ppc64le cleanup

* skip PIE tests for function call injection on other packages

* Address review comments

* accounted for additional skipped PIE tests for function call injection

* Code cleanup and undoing revert of previous commit

* Enable function call injection only on 1.22 and above and some cleanup

* additional cleanup, go fmt run

* Debug function call tests fail on ppc64le/PIE mode adjusted the backup_test_health.md file accordingly
2023-09-21 10:39:57 -07:00

49 lines
1.5 KiB
Go

package native
import (
"fmt"
"debug/elf"
"syscall"
"unsafe"
sys "golang.org/x/sys/unix"
"github.com/go-delve/delve/pkg/proc"
"github.com/go-delve/delve/pkg/proc/linutil"
)
func (t *nativeThread) fpRegisters() ([]proc.Register, []byte, error) {
var regs []proc.Register
var fpregs linutil.PPC64LEPtraceFpRegs
var err error
t.dbp.execPtraceFunc(func() { fpregs.Fp, err = ptraceGetFpRegset(t.ID) })
regs = fpregs.Decode()
if err != nil {
err = fmt.Errorf("could not get floating point registers: %v", err.Error())
}
return regs, fpregs.Fp, err
}
func (t *nativeThread) restoreRegisters(savedRegs proc.Registers) error {
sr := savedRegs.(*linutil.PPC64LERegisters)
var restoreRegistersErr error
t.dbp.execPtraceFunc(func() {
restoreRegistersErr = ptraceSetGRegs(t.ID, sr.Regs)
if restoreRegistersErr != syscall.Errno(0) && restoreRegistersErr != nil {
return
}
if sr.Fpregset != nil {
iov := sys.Iovec{Base: &sr.Fpregset[0], Len: _PPC64LE_FPREGS_SIZE}
_, _, restoreRegistersErr = syscall.Syscall6(syscall.SYS_PTRACE, sys.PTRACE_SETREGSET, uintptr(t.ID), uintptr(elf.NT_FPREGSET), uintptr(unsafe.Pointer(&iov)), 0, 0)
}
})
if restoreRegistersErr == syscall.Errno(0) {
restoreRegistersErr = nil
}
return restoreRegistersErr
}