_dr_mcontext_t Struct Reference

#include <dr_defines.h>

Data Fields
size_t	size
dr_mcontext_flags_t	flags
reg_t	r0
reg_t	r1
reg_t	r2
reg_t	r3
reg_t	r4
reg_t	r5
reg_t	r6
reg_t	r7
reg_t	r8
reg_t	r9
reg_t	r10
reg_t	r11
reg_t	r12
reg_t	r13
reg_t	r14
reg_t	r15
reg_t	r16
reg_t	r17
reg_t	r18
reg_t	r19
reg_t	r20
reg_t	r21
reg_t	r22
reg_t	r23
reg_t	r24
reg_t	r25
reg_t	r26
reg_t	r27
reg_t	r28
reg_t	r29
union {
reg_t   r30
reg_t   lr
};
union {
reg_t   r31
reg_t   sp
reg_t   xsp
};
byte *	pc
union {
uint   xflags
struct {
uint   nzcv
uint   fpcr
uint   fpsr
}
};
dr_simd_t	simd [NUM_SIMD_SLOTS]

Detailed Description

Machine context structure.

Field Documentation

@2

union { ... }

The anonymous union of alternative names for r30/lr register.

@4

union { ... }

The anonymous union of alternative names for r31/sp register.

@6

union { ... }

The anonymous union of alternative names for flag registers.

flags

dr_mcontext_flags_t _dr_mcontext_t::flags

The valid fields of this structure. This field must be set prior to filling in the fields. For input requests (dr_get_mcontext()), this indicates which fields should be written. Writing the multimedia fields frequently can incur a performance hit. For output requests (dr_set_mcontext() and dr_redirect_execution()), this indicates which fields will be copied to the actual context.

fpcr

uint _dr_mcontext_t::fpcr

Floating-Point Control Register.

fpsr

uint _dr_mcontext_t::fpsr

Floating-Point Status Register.

lr

reg_t _dr_mcontext_t::lr

The link register.

nzcv

uint _dr_mcontext_t::nzcv

Condition flags (status register).

pc

byte* _dr_mcontext_t::pc

The program counter.

Note

This field is not always set or read by all API routines.

r0

reg_t _dr_mcontext_t::r0

The r0 register.

r1

reg_t _dr_mcontext_t::r1

The r1 register.

r10

reg_t _dr_mcontext_t::r10

The r10 register.

r11

reg_t _dr_mcontext_t::r11

The r11 register.

r12

reg_t _dr_mcontext_t::r12

The r12 register.

r13

reg_t _dr_mcontext_t::r13

The r13 register.

r14

reg_t _dr_mcontext_t::r14

The r14 register.

r15

reg_t _dr_mcontext_t::r15

The r15 register.

r16

reg_t _dr_mcontext_t::r16

The r16 register.

Note

For 64-bit DR builds only.

r17

reg_t _dr_mcontext_t::r17

The r17 register.

Note

For 64-bit DR builds only.

r18

reg_t _dr_mcontext_t::r18

The r18 register.

Note

For 64-bit DR builds only.

r19

reg_t _dr_mcontext_t::r19

The r19 register.

Note

For 64-bit DR builds only.

r2

reg_t _dr_mcontext_t::r2

The r2 register.

r20

reg_t _dr_mcontext_t::r20

The r20 register.

Note

For 64-bit DR builds only.

r21

reg_t _dr_mcontext_t::r21

The r21 register.

Note

For 64-bit DR builds only.

r22

reg_t _dr_mcontext_t::r22

The r22 register.

Note

For 64-bit DR builds only.

r23

reg_t _dr_mcontext_t::r23

The r23 register.

Note

For 64-bit DR builds only.

r24

reg_t _dr_mcontext_t::r24

The r24 register.

Note

For 64-bit DR builds only.

r25

reg_t _dr_mcontext_t::r25

The r25 register.

Note

For 64-bit DR builds only.

r26

reg_t _dr_mcontext_t::r26

The r26 register.

Note

For 64-bit DR builds only.

r27

reg_t _dr_mcontext_t::r27

The r27 register.

Note

For 64-bit DR builds only.

r28

reg_t _dr_mcontext_t::r28

The r28 register.

Note

For 64-bit DR builds only.

r29

reg_t _dr_mcontext_t::r29

The r29 register.

Note

For 64-bit DR builds only.

r3

reg_t _dr_mcontext_t::r3

The r3 register.

r30

reg_t _dr_mcontext_t::r30

The r30 register.

Note

For 64-bit DR builds only.

r31

reg_t _dr_mcontext_t::r31

The r31 register.

Note

For 64-bit DR builds only.

r4

reg_t _dr_mcontext_t::r4

The r4 register.

r5

reg_t _dr_mcontext_t::r5

The r5 register.

r6

reg_t _dr_mcontext_t::r6

The r6 register.

r7

reg_t _dr_mcontext_t::r7

The r7 register.

r8

reg_t _dr_mcontext_t::r8

The r8 register.

r9

reg_t _dr_mcontext_t::r9

The r9 register.

simd

dr_simd_t _dr_mcontext_t::simd[NUM_SIMD_SLOTS]

The SIMD registers. We would probably be ok if we did not preserve the callee-saved registers (q4-q7 == d8-d15) but to be safe we preserve them all. We do not need anything more than word alignment for OP_vldm/OP_vstm, and dr_simd_t has no fields larger than 32 bits, so we have no padding.

size

size_t _dr_mcontext_t::size

The size of this structure. This field must be set prior to filling in the fields to support forward compatibility.

sp

reg_t _dr_mcontext_t::sp

The stack pointer register.

xflags

uint _dr_mcontext_t::xflags

The platform-independent name for condition flags.

xsp

reg_t _dr_mcontext_t::xsp

The platform-independent name for the stack pointer register.

---

The documentation for this struct was generated from the following file:

• /work/dr/build_package/build_release-32/include/dr_defines.h