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* libc/machine/arm/setjmp.S: Fix thumb2 support. 

* arm/crt0.S: Allow assembly under ARMv7 ISA.  Support for
            initializing stack pointers for interrupt modes is still pending.
This commit is contained in:
Nick Clifton 2008-04-25 09:02:40 +00:00
parent 4214d0c04c
commit 026f9d290f
4 changed files with 27 additions and 1 deletions
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5
libgloss/ChangeLog
View File

@ -1,3 +1,8 @@
2008-04-25 Nick Clifton <nickc@redhat.com>
* arm/crt0.S: Allow assembly under ARMv7 ISA. Support for
initializing stack pointers for interrupt modes is still pending.
2008-04-14 Patrick Mansfield <patmans@us.ibm.com>
* spu/sbrk.c: Remove "extern int errno", use whatever is supplied

9
libgloss/arm/crt0.S
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@ -82,12 +82,18 @@
ldr r3, .Lstack
cmp r3, #0
#ifdef __thumb2__
it eq
#endif
ldreq r3, .LC0
/* Note: This 'mov' is essential when starting in User, and ensures we
always get *some* sp value for the initial mode, even if we
have somehow missed it below (in which case it gets the same
value as FIQ - not ideal, but better than nothing.) */
mov sp, r3
#ifdef __thumb2__
/* XXX Fill in stack assignments for interrupt modes. */
#else
mrs r2, CPSR
tst r2, #0x0F /* Test mode bits - in User of all are 0 */
beq .LC23 /* "eq" means r2 AND #0x0F is 0 */
@ -109,6 +115,7 @@
sub r3, r3, #0x2000
msr CPSR_c, #0xD3 /* Supervisory mode, interrupts disabled */
mov sp, r3
sub r3, r3, #0x8000 /* Min size 32k */
bic r3, r3, #0x00FF /* Align with current 64k block */
@ -116,9 +123,9 @@
str r3, [r3, #-4] /* Move value into user mode sp without */
ldmdb r3, {sp}^ /* changing modes, via '^' form of ldm */
orr r2, r2, #0xC0 /* Back to original mode, presumably SVC, */
msr CPSR_c, r2 /* with FIQ/IRQ disable bits forced to 1 */
#endif
.LC23:
/* Setup a default stack-limit in-case the code has been
compiled with "-mapcs-stack-check". Hard-wiring this value

4
newlib/ChangeLog
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@ -1,3 +1,7 @@
2008-04-25 Nick Clifton <nickc@redhat.com>
* libc/machine/arm/setjmp.S: Fix thumb2 support.
2008-04-24 Nick Clifton <nickc@redhat.com>
* libc/include/machine/ieeefp.h: Fix typo: _DOUBLE_IS_32_BITS

10
newlib/libc/machine/arm/setjmp.S
View File

@ -120,7 +120,12 @@ SYM (\name):
FUNC_START setjmp
/* Save all the callee-preserved registers into the jump buffer. */
#ifdef __thumb2__
stmea a1!, { v1-v7, fp, ip, lr }
str sp, [a1],#+4
#else
stmea a1!, { v1-v7, fp, ip, sp, lr }
#endif
#if 0 /* Simulator does not cope with FP instructions yet. */
#ifndef __SOFTFP__
@ -142,7 +147,12 @@ SYM (\name):
/* If we have stack extension code it ought to be handled here. */
/* Restore the registers, retrieving the state when setjmp() was called. */
#ifdef __thumb2__
ldmfd a1!, { v1-v7, fp, ip, lr }
ldr sp, [a1],#+4
#else
ldmfd a1!, { v1-v7, fp, ip, sp, lr }
#endif
#if 0 /* Simulator does not cope with FP instructions yet. */
#ifndef __SOFTFP__