From 09150e53b3d4442c6e7afd3696691c16baaea8f0 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sun, 8 Sep 2019 14:24:03 +0000
Subject: mgdb: amd64_winnt_fetch_registers(): initial implementation and
 integration.

---
 overlay/mgdb/gdb/amd64-winnt-tdep.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'overlay/mgdb/gdb/amd64-winnt-tdep.c')

diff --git a/overlay/mgdb/gdb/amd64-winnt-tdep.c b/overlay/mgdb/gdb/amd64-winnt-tdep.c
index cf53d3d..f663677 100644
--- a/overlay/mgdb/gdb/amd64-winnt-tdep.c
+++ b/overlay/mgdb/gdb/amd64-winnt-tdep.c
@@ -6,10 +6,14 @@
 
 #include "defs.h"
 #include "osabi.h"
+#include "regcache.h"
 #include "frame-unwind.h"
 #include "windows-tdep.h"
 #include "amd64-windows-tdep.c"
 
+#include <signal.h>
+#include <sys/debug.h>
+
 #define amd64_winnt_push_dummy_call		amd64_windows_push_dummy_call
 #define amd64_winnt_return_value		amd64_windows_return_value
 #define amd64_winnt_skip_trampoline_code	amd64_windows_skip_trampoline_code
@@ -18,6 +22,38 @@
 #define amd64_winnt_skip_main_prologue		amd64_skip_main_prologue
 #define amd64_winnt_frame_unwind                amd64_windows_frame_unwind
 
+struct regcache;
+
+static void amd64_winnt_supply_reg(
+	struct regcache * rcache,
+	int regnum, uintptr_t regval)
+{
+	regcache_raw_supply(rcache,regnum,&regval);
+}
+
+static void amd64_winnt_supply_pc_regs(
+	struct regcache * rcache,
+	mcontext_t * regctx)
+{
+	amd64_winnt_supply_reg(rcache,AMD64_RIP_REGNUM,regctx->uc_rip);
+}
+
+int amd64_winnt_fetch_registers(
+	int pfd, struct regcache * rcache,
+	int regnum, pid_t tid)
+{
+	int ret;
+	mcontext_t regctx;
+
+	if ((ret = __dbg_regs_fetch(pfd,tid,&regctx)) < 0)
+		return ret;
+
+	if (regnum == AMD64_RIP_REGNUM)
+		amd64_winnt_supply_pc_regs(rcache,&regctx);
+
+	return 0;
+}
+
 static void amd64_winnt_init_abi (struct gdbarch_info info, struct gdbarch * gdbarch)
 {
 	/* abi */
-- 
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