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Process: fix FXSAVE on x86 

The FXSAVE member `ftw` (FPU Tag Word) was given the wrong size (8-bit)
instead of the correct width (16-bit) as per the x87 Programmer's
Manual.  Adjust this to ensure that we print out the complete value for
the register.

llvm-svn: 311579
This commit is contained in:
Saleem Abdulrasool 2017-08-23 17:23:12 +00:00
parent fe3a5bfb25
commit bf2a8a2878
3 changed files with 3 additions and 5 deletions
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2
lldb/packages/Python/lldbsuite/test/functionalities/register/register_command/TestRegisters.py
View File

@ -256,7 +256,7 @@ class RegisterCommandsTestCase(TestBase):
self.expect(
"register read ftag", substrs=[
'ftag' + ' = ', str(
"0x%0.2x" %
"0x%0.4x" %
(reg_value_ftag_initial | (
1 << fstat_top_pointer_initial)))])
reg_value_ftag_initial = reg_value_ftag_initial | (

3
lldb/source/Plugins/Process/Utility/RegisterContextLinux_i386.cpp
View File

@ -36,8 +36,7 @@ struct GPR {
struct FPR_i386 {
uint16_t fctrl; // FPU Control Word (fcw)
uint16_t fstat; // FPU Status Word (fsw)
uint8_t ftag; // FPU Tag Word (ftw)
uint8_t reserved_1; // Reserved
uint16_t ftag; // FPU Tag Word (ftw)
uint16_t fop; // Last Instruction Opcode (fop)
union {
struct {

3
lldb/source/Plugins/Process/Utility/RegisterContext_x86.h
View File

@ -257,8 +257,7 @@ struct XMMReg {
struct FXSAVE {
uint16_t fctrl; // FPU Control Word (fcw)
uint16_t fstat; // FPU Status Word (fsw)
uint8_t ftag; // FPU Tag Word (ftw)
uint8_t reserved_1; // Reserved
uint16_t ftag; // FPU Tag Word (ftw)
uint16_t fop; // Last Instruction Opcode (fop)
union {
struct {