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Add support for Semihosting v2 support for ARM in libgloss.

Browse Source 
Semihosting v2 changes are documented here:
https://developer.arm.com/docs/100863/latest/

The biggest change is the addition of an extensions mechanism
to add more extensions in the future.

Signed-off-by: Tamar Christina <tamar.christina@arm.com>
This commit is contained in:
Tamar Christina
2017-07-05 13:04:07 +01:00
committed by Corinna Vinschen
parent cc142edbe7
commit d7d6ad7b6b
3 changed files with 230 additions and 64 deletions
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98
libgloss/arm/swi.h
View File

@ -1,4 +1,5 @@
#include "arm.h"
#include <_ansi.h>
/* SWI numbers for RDP (Demon) monitor. */
#define SWI_WriteC 0x0
@ -29,45 +30,76 @@
/* Now the SWI numbers and reason codes for RDI (Angel) monitors. */
#define AngelSWI_ARM 0x123456
#ifdef __thumb__
#define AngelSWI 0xAB
#else
#define AngelSWI AngelSWI_ARM
#endif
#if defined (SEMIHOST_V2) && defined (SEMIHOST_V2_MIXED_MODE)
#define AngelSWI_ARM 0xF000 /* HLT A32. */
#ifdef __thumb__
#define AngelSWI 0x3C /* HLT T32. */
#else /* __thumb__. */
#define AngelSWI AngelSWI_ARM
#endif /* __thumb__. */
#else /* SEMIHOST_V2. */
#define AngelSWI_ARM 0x123456 /* SVC A32. */
#ifdef __thumb__
#define AngelSWI 0xAB /* SVC T32. */
#else /* __thumb__. */
#define AngelSWI AngelSWI_ARM
#endif /* __thumb__. */
#endif /* SEMIHOST_V2. */
/* For thumb only architectures use the BKPT instruction instead of SWI. */
#ifdef THUMB_VXM
#define AngelSWIInsn "bkpt"
#define AngelSWIAsm bkpt
#define AngelSWIInsn "bkpt"
#define AngelSWIAsm bkpt
#else
#define AngelSWIInsn "swi"
#define AngelSWIAsm swi
#define AngelSWIInsn "swi"
#define AngelSWIAsm swi
#endif
/* The reason codes: */
#define AngelSWI_Reason_Open 0x01
#define AngelSWI_Reason_Close 0x02
#define AngelSWI_Reason_WriteC 0x03
#define AngelSWI_Reason_Write0 0x04
#define AngelSWI_Reason_Write 0x05
#define AngelSWI_Reason_Read 0x06
#define AngelSWI_Reason_ReadC 0x07
#define AngelSWI_Reason_IsTTY 0x09
#define AngelSWI_Reason_Seek 0x0A
#define AngelSWI_Reason_FLen 0x0C
#define AngelSWI_Reason_TmpNam 0x0D
#define AngelSWI_Reason_Remove 0x0E
#define AngelSWI_Reason_Rename 0x0F
#define AngelSWI_Reason_Clock 0x10
#define AngelSWI_Reason_Time 0x11
#define AngelSWI_Reason_System 0x12
#define AngelSWI_Reason_Errno 0x13
#define AngelSWI_Reason_GetCmdLine 0x15
#define AngelSWI_Reason_HeapInfo 0x16
#define AngelSWI_Reason_EnterSVC 0x17
#define AngelSWI_Reason_ReportException 0x18
#define ADP_Stopped_ApplicationExit ((2 << 16) + 38)
#define ADP_Stopped_RunTimeError ((2 << 16) + 35)
#define AngelSWI_Reason_Open 0x01
#define AngelSWI_Reason_Close 0x02
#define AngelSWI_Reason_WriteC 0x03
#define AngelSWI_Reason_Write0 0x04
#define AngelSWI_Reason_Write 0x05
#define AngelSWI_Reason_Read 0x06
#define AngelSWI_Reason_ReadC 0x07
#define AngelSWI_Reason_IsError 0x08
#define AngelSWI_Reason_IsTTY 0x09
#define AngelSWI_Reason_Seek 0x0A
#define AngelSWI_Reason_FLen 0x0C
#define AngelSWI_Reason_TmpNam 0x0D
#define AngelSWI_Reason_Remove 0x0E
#define AngelSWI_Reason_Rename 0x0F
#define AngelSWI_Reason_Clock 0x10
#define AngelSWI_Reason_Time 0x11
#define AngelSWI_Reason_System 0x12
#define AngelSWI_Reason_Errno 0x13
#define AngelSWI_Reason_GetCmdLine 0x15
#define AngelSWI_Reason_HeapInfo 0x16
#define AngelSWI_Reason_EnterSVC 0x17
#define AngelSWI_Reason_ReportException 0x18
#define AngelSWI_Reason_ReportExceptionExtended 0x20
#define AngelSWI_Reason_Elapsed 0x30
#define AngelSWI_Reason_TickFreq 0x31
#define ADP_Stopped_ApplicationExit ((2 << 16) + 38)
#define ADP_Stopped_RunTimeError ((2 << 16) + 35)
/* Semihosting feature magic numbers. */
#define NUM_SHFB_MAGIC 4
#define SHFB_MAGIC_0 0x53
#define SHFB_MAGIC_1 0x48
#define SHFB_MAGIC_2 0x46
#define SHFB_MAGIC_3 0x42
/* Semihosting extensions. */
#define SH_EXT_EXIT_EXTENDED_BITNUM 0x0
#define SH_EXT_STDOUT_STDERR_BITNUM 0x1
#if !defined (__ASSEMBLER__)
extern int _get_semihosting_exts _PARAMS ((char*, int, int));
extern int _has_ext_exit_extended _PARAMS ((void));
extern int _has_ext_stdout_stderr _PARAMS ((void));
#endif
#if defined(ARM_RDI_MONITOR) && !defined(__ASSEMBLER__)