mgdb: amd64_winnt_init_reg_offsets(): initial implementation and integration.

2 files changed, 74 insertions, 0 deletions

diff --git a/overlay/mgdb/gdb/amd64-winnt-regcache.c b/overlay/mgdb/gdb/amd64-winnt-regcache.c
index 0cf7928..83a836c 100644
--- a/overlay/mgdb/gdb/amd64-winnt-regcache.c
+++ b/overlay/mgdb/gdb/amd64-winnt-regcache.c
@@ -14,6 +14,8 @@
 
 struct regcache;
 
+static unsigned regoffs[AMD64_NUM_REGS];
+
 static void amd64_winnt_supply_reg(
 	struct regcache * rcache,
 	int regnum, uintptr_t regval)
@@ -77,3 +79,70 @@ int amd64_winnt_fetch_registers(
 
 	return 0;
 }
+
+#define AMD64_WINNT_INIT_REG_OFFSET(regnum,regmem) \
+	regoffs[regnum] = offsetof(mcontext_t,regmem)
+
+#define AMD64_WINNT_INIT_MX_REG_OFFSET(regidx,regmem) \
+	regoffs[regidx] = offsetof(mcontext_t,\
+		uc_flt.uc_flt_save.regmem)
+
+#define AMD64_WINNT_INIT_XSAVE_REG_OFFSET(ctrlidx,regmem) \
+	regoffs[AMD64_FCTRL_REGNUM+ctrlidx] = offsetof(mcontext_t,\
+		uc_flt.uc_flt_save.regmem)
+
+#define AMD64_WINNT_INIT_ST_REG_OFFSET(regnum,stidx) \
+	regoffs[AMD64_ST0_REGNUM+stidx] = offsetof(mcontext_t,  \
+		uc_flt.uc_flt_save.uc_float_registers[stidx])
+
+#define AMD64_WINNT_INIT_XMM_REG_OFFSET(regnum,stidx) \
+	regoffs[AMD64_XMM0_REGNUM+stidx] = offsetof(mcontext_t,  \
+		uc_flt.uc_flt_save.uc_float_registers[stidx])
+
+void amd64_winnt_init_reg_offsets(void)
+{
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_RAX_REGNUM,uc_rax);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_RBX_REGNUM,uc_rbx);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_RCX_REGNUM,uc_rcx);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_RDX_REGNUM,uc_rdx);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_RSI_REGNUM,uc_rsi);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_RDI_REGNUM,uc_rdi);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_RBP_REGNUM,uc_rbp);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_RSP_REGNUM,uc_rsp);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_R8_REGNUM, uc_r8);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_R9_REGNUM, uc_r9);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_R10_REGNUM,uc_r10);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_R11_REGNUM,uc_r11);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_R12_REGNUM,uc_r12);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_R13_REGNUM,uc_r13);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_R14_REGNUM,uc_r14);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_R15_REGNUM,uc_r15);
+
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_CS_REGNUM,uc_seg_cs);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_SS_REGNUM,uc_seg_ss);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_DS_REGNUM,uc_seg_ds);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_ES_REGNUM,uc_seg_es);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_FS_REGNUM,uc_seg_fs);
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_GS_REGNUM,uc_seg_gs);
+
+	AMD64_WINNT_INIT_REG_OFFSET(AMD64_EFLAGS_REGNUM,uc_eflags);
+	AMD64_WINNT_INIT_MX_REG_OFFSET(AMD64_MXCSR_REGNUM,uc_mx_csr);
+
+	AMD64_WINNT_INIT_XSAVE_REG_OFFSET(0,uc_control_word);
+	AMD64_WINNT_INIT_XSAVE_REG_OFFSET(0,uc_status_word);
+	AMD64_WINNT_INIT_XSAVE_REG_OFFSET(0,uc_tag_word);
+	AMD64_WINNT_INIT_XSAVE_REG_OFFSET(0,uc_error_selector);
+	AMD64_WINNT_INIT_XSAVE_REG_OFFSET(0,uc_error_offset);
+	AMD64_WINNT_INIT_XSAVE_REG_OFFSET(0,uc_data_selector);
+	AMD64_WINNT_INIT_XSAVE_REG_OFFSET(0,uc_data_offset);
+	AMD64_WINNT_INIT_XSAVE_REG_OFFSET(0,uc_error_opcode);
+
+	AMD64_WINNT_INIT_ST_REG_OFFSET(0,0);
+	AMD64_WINNT_INIT_ST_REG_OFFSET(1,1);
+	AMD64_WINNT_INIT_ST_REG_OFFSET(2,2);
+	AMD64_WINNT_INIT_ST_REG_OFFSET(3,3);
+	AMD64_WINNT_INIT_ST_REG_OFFSET(4,4);
+	AMD64_WINNT_INIT_ST_REG_OFFSET(5,5);
+	AMD64_WINNT_INIT_ST_REG_OFFSET(6,6);
+	AMD64_WINNT_INIT_ST_REG_OFFSET(7,7);
+}
diff --git a/overlay/mgdb/gdb/amd64-winnt-tdep.c b/overlay/mgdb/gdb/amd64-winnt-tdep.c
index ab06122..c9089dc 100644
--- a/overlay/mgdb/gdb/amd64-winnt-tdep.c
+++ b/overlay/mgdb/gdb/amd64-winnt-tdep.c
@@ -19,6 +19,8 @@
 #define amd64_winnt_skip_main_prologue		amd64_skip_main_prologue
 #define amd64_winnt_frame_unwind                amd64_windows_frame_unwind
 
+extern void amd64_winnt_init_reg_offsets(void);
+
 static void amd64_winnt_init_abi (struct gdbarch_info info, struct gdbarch * gdbarch)
 {
 	/* abi */
@@ -41,6 +43,9 @@ static void amd64_winnt_init_abi (struct gdbarch_info info, struct gdbarch * gdb
 
 	/* solibs */
 	set_solib_ops                     (gdbarch, &solib_target_so_ops);
+
+	/* register offsets */
+	amd64_winnt_init_reg_offsets();
 }
 
 void windows_init_abi (struct gdbarch_info info, struct gdbarch * gdbarch)