[PATCH v2] ntdll: Support both HP-UX-like libunwind and LLVM libunwind error codes.
Jinoh Kang
jinoh.kang.kr at gmail.com
Thu Dec 9 10:26:53 CST 2021
HP-UX libunwind uses the sign of error code to indicate whether the
operation was successful; however, LLVM always returns positive error
codes.
Normalise the sign of the error code so that it handles all flavours of
libunwind.
Signed-off-by: Jinoh Kang <jinoh.kang.kr at gmail.com>
---
dlls/ntdll/unix/signal_arm.c | 5 +++--
dlls/ntdll/unix/signal_arm64.c | 5 +++--
dlls/ntdll/unix/signal_x86_64.c | 1 +
3 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/dlls/ntdll/unix/signal_arm.c b/dlls/ntdll/unix/signal_arm.c
index f4987f902e0..48c2bc159b5 100644
--- a/dlls/ntdll/unix/signal_arm.c
+++ b/dlls/ntdll/unix/signal_arm.c
@@ -248,12 +248,13 @@ NTSTATUS CDECL unwind_builtin_dll( ULONG type, struct _DISPATCHER_CONTEXT *dispa
return STATUS_INVALID_DISPOSITION;
}
rc = unw_get_proc_info( &cursor, &info );
- if (rc != UNW_ESUCCESS && rc != -UNW_ENOINFO)
+ if (rc < 0) rc = -rc; /* libunwind may return negative error codes */
+ if (rc != UNW_ESUCCESS && rc != UNW_ENOINFO)
{
WARN( "failed to get info: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
- if (rc == -UNW_ENOINFO || ip < info.start_ip || ip > info.end_ip)
+ if (rc == UNW_ENOINFO || ip < info.start_ip || ip > info.end_ip)
{
NTSTATUS status = context->Pc != context->Lr ?
STATUS_SUCCESS : STATUS_INVALID_DISPOSITION;
diff --git a/dlls/ntdll/unix/signal_arm64.c b/dlls/ntdll/unix/signal_arm64.c
index ae44fb02982..4cdbd888bf0 100644
--- a/dlls/ntdll/unix/signal_arm64.c
+++ b/dlls/ntdll/unix/signal_arm64.c
@@ -212,12 +212,13 @@ NTSTATUS CDECL unwind_builtin_dll( ULONG type, DISPATCHER_CONTEXT *dispatch, CON
return STATUS_INVALID_DISPOSITION;
}
rc = unw_get_proc_info( &cursor, &info );
- if (rc != UNW_ESUCCESS && rc != -UNW_ENOINFO)
+ if (rc < 0) rc = -rc; /* libunwind may return negative error codes */
+ if (rc != UNW_ESUCCESS && rc != UNW_ENOINFO)
{
WARN( "failed to get info: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
- if (rc == -UNW_ENOINFO || ip < info.start_ip || ip > info.end_ip)
+ if (rc == UNW_ENOINFO || ip < info.start_ip || ip > info.end_ip)
{
TRACE( "no info found for %lx ip %lx-%lx, assuming leaf function\n",
ip, info.start_ip, info.end_ip );
diff --git a/dlls/ntdll/unix/signal_x86_64.c b/dlls/ntdll/unix/signal_x86_64.c
index 3d7b8e256b4..d1e2e27c46c 100644
--- a/dlls/ntdll/unix/signal_x86_64.c
+++ b/dlls/ntdll/unix/signal_x86_64.c
@@ -1415,6 +1415,7 @@ static NTSTATUS libunwind_virtual_unwind( ULONG64 ip, ULONG64 *frame, CONTEXT *c
*frame = context->Rsp;
rc = unw_get_proc_info(&cursor, &info);
+ if (rc < 0) rc = -rc; /* libunwind may return negative error codes */
if (rc != UNW_ESUCCESS && rc != UNW_ENOINFO)
{
WARN( "failed to get info: %d\n", rc );
--
2.34.1
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