JehanneOS/newlib
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Stack Pointer and Stack Limit initialization refactored.

Browse Source 
SP initialization changes:
  1. set default value in semihosting case as well
  2. moved existing SP & SL init code for processor modes in separate routine and made it as "hook"
  3. init SP for processor modes in Thumb mode as well

Add new macro FN_RETURN, FN_EH_START and FN_EH_END.
This commit is contained in:
Alexander Fedotov
2019-07-22 11:18:53 -05:00
committed by Corinna Vinschen
parent ae59d09308
commit 942f60d714
4 changed files with 454 additions and 178 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
libgloss/arm/arm.h
View File

@ -61,4 +61,30 @@
# define HAVE_CALL_INDIRECT
#endif
/* A and R profiles (and legacy Arm).
Current Program Status Register (CPSR)
M[4:0] Mode bits. M[4] is always 1 for 32-bit modes.
T[5] 1: Thumb, 0: ARM instruction set
F[6] 1: disables FIQ
I[7] 1: disables IRQ
A[8] 1: disables imprecise aborts
E[9] 0: Little-endian, 1: Big-endian
J[24] 1: Jazelle instruction set
*/
#define CPSR_M_USR 0x00 /* User mode. */
#define CPSR_M_FIQ 0x01 /* Fast Interrupt mode. */
#define CPSR_M_IRQ 0x02 /* Interrupt mode. */
#define CPSR_M_SVR 0x03 /* Supervisor mode. */
#define CPSR_M_MON 0x06 /* Monitor mode. */
#define CPSR_M_ABT 0x07 /* Abort mode. */
#define CPSR_M_HYP 0x0A /* Hypervisor mode. */
#define CPSR_M_UND 0x0B /* Undefined mode. */
#define CPSR_M_SYS 0x0F /* System mode. */
#define CPSR_M_32BIT 0x10 /* 32-bit mode. */
#define CPSR_T_BIT 0x20 /* Thumb bit. */
#define CPSR_F_MASK 0x40 /* FIQ bit. */
#define CPSR_I_MASK 0x80 /* IRQ bit. */
#define CPSR_M_MASK 0x0F /* Mode mask except M[4]. */
#endif /* _LIBGLOSS_ARM_H */