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Fix Cortex m0 Raw32 scheduler.

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Ensure 8 byte alignment of the stack for all ARM specific scheduler code.
This commit is contained in:
inmarket 2016-12-30 18:57:09 +10:00
parent 06de6f1931
commit 6a30927a91
3 changed files with 25 additions and 18 deletions
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29
src/gos/gos_x_threads_cortexm01.h
View file

@ -27,8 +27,10 @@
"mov r6, r10 \n\t"
"mov r7, r11 \n\t"
"push {r4, r5, r6, r7} \n\t"
"str sp, %[oldtcxt] \n\t"
"ldr sp, %[newtcxt] \n\t"
"mov r4, sp \n\t"
"str r4, %[oldtcxt] \n\t"
"ldr r4, %[newtcxt] \n\t"
"mov sp, r4 \n\t"
"pop {r4, r5, r6, r7} \n\t"
"mov r8, r4 \n\t"
"mov r9, r5 \n\t"
@ -41,15 +43,17 @@
}
static __attribute__((pcs("aapcs"),naked)) void _gfxStartThread(thread *oldt, thread *newt) {
newt->cxt = (char *)newt + newt->size;
newt->cxt = (void *)(((unsigned)newt + newt->size) & ~7);
__asm__ volatile ( "push {r4, r5, r6, r7, lr} \n\t"
"mov r4, r8 \n\t"
"mov r5, r9 \n\t"
"mov r6, r10 \n\t"
"mov r7, r11 \n\t"
"push {r4, r5, r6, r7} \n\t"
"str sp, %[oldtcxt] \n\t"
"ldr sp, %[newtcxt] \n\t"
"mov r4, sp \n\t"
"str r4, %[oldtcxt] \n\t"
"ldr r4, %[newtcxt] \n\t"
"mov sp, r4 \n\t"
: [newtcxt] "=m" (newt->cxt)
: [oldtcxt] "m" (oldt->cxt)
: "memory");
@ -72,10 +76,12 @@
mov r6, r10
mov r7, r11
push {r4, r5, r6, r7}
str sp, [r0,#__cpp(offsetof(thread,cxt))] // oldt->cxt
mov r4, sp
str r4, [r0,#__cpp(offsetof(thread,cxt))] // oldt->cxt
// Load the new context
ldr sp, [r1,#__cpp(offsetof(thread,cxt))] // newt->cxt
ldr r4, [r1,#__cpp(offsetof(thread,cxt))] // newt->cxt
mov sp, r4
pop {r4, r5, r6, r7}
mov r8, r4
mov r9, r5
@ -88,9 +94,10 @@
PRESERVE8
// Calculate where to generate the new context
// newt->cxt = (char *)newt + newt->size;
// newt->cxt = (void *)(((unsigned)newt + newt->size) & ~7);
ldr r2,[r1,#__cpp(offsetof(thread,size))]
add r2,r2,r1
and r2, r2, #0xFFFFFFF8
str r2,[r1,#__cpp(offsetof(thread,cxt))]
// Save the old context
@ -100,10 +107,12 @@
mov r6, r10
mov r7, r11
push {r4, r5, r6, r7}
str sp, [r0,#__cpp(offsetof(thread,cxt))] // oldt->cxt
mov r4, sp
str r4, [r0,#__cpp(offsetof(thread,cxt))] // oldt->cxt
// Load the new (imcomplete) context
ldr sp, [r1,#__cpp(offsetof(thread,cxt))] // newt->cxt
ldr r4, [r1,#__cpp(offsetof(thread,cxt))] // newt->cxt
mov sp, r4
// Run the users function - we save some code because gfxThreadExit() never returns
// gfxThreadExit(_gfxCurrentThread->fn(_gfxCurrentThread->param));

5
src/gos/gos_x_threads_cortexm347.h
View file

@ -32,7 +32,7 @@
}
static __attribute__((pcs("aapcs"),naked)) void _gfxStartThread(thread *oldt, thread *newt) {
newt->cxt = (char *)newt + newt->size;
newt->cxt = (void *)(((unsigned)newt + newt->size) & ~7);
__asm__ volatile ( "push {r4, r5, r6, r7, r8, r9, r10, r11, lr} \n\t"
"str sp, %[oldtcxt] \n\t"
"ldr sp, %[newtcxt] \n\t"
@ -64,9 +64,10 @@
PRESERVE8
// Calculate where to generate the new context
// newt->cxt = (char *)newt + newt->size;
// newt->cxt = (void *)(((unsigned)newt + newt->size) & ~7);
ldr r2,[r1,#__cpp(offsetof(thread,size))]
add r2,r2,r1
and r2, r2, #0xFFFFFFF8
str r2,[r1,#__cpp(offsetof(thread,cxt))]
// Save the old context

9
src/gos/gos_x_threads_cortexm47fp.h
View file

@ -12,10 +12,6 @@
* The context is saved at the current stack location and a pointer is maintained in the thread structure.
*/
#if !CORTEX_USE_FPU
#warning "GOS Threads: You have specified GFX_CPU=GFX_CPU_CORTX_M?_FP with hardware floating point support but CORTEX_USE_FPU is FALSE. Try using GFX_CPU_GFX_CPU_CORTEX_M? instead"
#endif
#if GFX_COMPILER == GFX_COMPILER_GCC || GFX_COMPILER == GFX_COMPILER_CYGWIN || GFX_COMPILER == GFX_COMPILER_MINGW32 || GFX_COMPILER == GFX_COMPILER_MINGW64
#define GFX_THREADS_DONE
#define _gfxThreadsInit()
@ -33,7 +29,7 @@
}
static __attribute__((pcs("aapcs-vfp"),naked)) void _gfxStartThread(thread *oldt, thread *newt) {
newt->cxt = (char *)newt + newt->size;
newt->cxt = (void *)(((unsigned)newt + newt->size) & ~7);
__asm__ volatile ( "push {r4, r5, r6, r7, r8, r9, r10, r11, lr} \n\t"
"vpush {s16-s31} \n\t"
"str sp, %[oldtcxt] \n\t"
@ -68,9 +64,10 @@
PRESERVE8
// Calculate where to generate the new context
// newt->cxt = (char *)newt + newt->size;
// newt->cxt = (void *)(((unsigned)newt + newt->size) & ~7);
ldr r2,[r1,#__cpp(offsetof(thread,size))]
add r2,r2,r1
and r2, r2, #0xFFFFFFF8
str r2,[r1,#__cpp(offsetof(thread,cxt))]
// Save the old context