Hi Jeff,
The code in libgloss/arm/linux-syscalls0.S has some macros for
working in Thumb mode which are totally bogus! It turns out that
the ARM based macros work just as well in Thumb mode, so I would
like to apply the attached patch to remove them.
Tested (but not by me) by building a Thumb based linux toolchain.
Cheers
Nick
libgloss/ChangeLog
2009-10-23 Nick Clifton<nickc@redhat.com>
* arm/linux-syscalls0.S (SYSCALL0, SYSCALL3, SYSCALL6, SYSCALL4):
Delete Thumb definitions - the ARM versions work correctly in
Thumb mode.
Index: libgloss/arm/linux-syscalls0.S
===================================================================
RCS file: /cvs/src/src/libgloss/arm/linux-syscalls0.S,v
retrieving revision 1.5
diff -c -3 -p -r1.5 linux-syscalls0.S
*** libgloss/arm/linux-syscalls0.S 3 Oct 2006 16:33:50 -0000 1.5
--- libgloss/arm/linux-syscalls0.S 23 Oct 2009 14:40:26 -0000
***************
*** 19,65 ****
#define GLOBAL(name) .global name; FUNC(name)
#define SIZE(name) .size name, .-name
- #if __thumb__
-
- # define SYSCALL0(name) \
- GLOBAL(_ ## name); \
- mov r12, r7; \
- mov r7, #SYS_ ## name; \
- swi; \
- mov r7, r12; \
- b _set_errno; \
- SIZE(_ ## name)
-
- /* static int _syscall3(int a, int b, int c, int number); */
- FUNC(_syscall3)
- push { r7 }
- mov r7, r3
- swi
- pop { r7 }
- b _set_errno
- SIZE(_syscall3)
-
- # define SYSCALL3(name) \
- GLOBAL(_ ## name); \
- mov r3, #SYS_ ## name; \
- b _syscall3; \
- SIZE(_ ## name)
-
- # define SYSCALL6(name) \
- GLOBAL(_ ## name); \
- push { r4 - r5, r7 }; \
- ldr r4, [sp, #12]; \
- ldr r5, [sp, #16]; \
- mov r7, #SYS_ ## name; \
- swi; \
- pop { r4 - r5, r7 }; \
- b _set_errno; \
- SIZE(_ ## name)
-
- # define SYSCALL4(name) SYSCALL6(name)
-
- #else /* __thumb__ */
-
# define SYSCALL4(name) \
GLOBAL(_ ## name); \
swi #SYS_ ## name; \
--- 19,24 ----
*************** FUNC(_syscall3)
*** 78,86 ****
#define SYSCALL0(name) SYSCALL3(name)
#define SYSCALL3(name) SYSCALL4(name)
-
- #endif /* __thumb__ */
-
#define SYSCALL1(name) SYSCALL3(name)
#define SYSCALL2(name) SYSCALL3(name)
#define SYSCALL5(name) SYSCALL6(name)
--- 37,42 ----