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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1995-05-24 21:39:42 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1995-05-24 21:39:42 +0000 |
| commit | 88d594a3d52cb5938521619bca0def8e5b040cf0 (patch) | |
| tree | c687a29a2a3d62c87e496c4c4700183f17210a5c /c/src/exec/score/cpu/unix/cpu.c | |
| parent | Forcing RCS revision to 1.2 I hope (diff) | |
| download | rtems-88d594a3d52cb5938521619bca0def8e5b040cf0.tar.bz2 | |
Fully tested on all in-house targets
Diffstat (limited to 'c/src/exec/score/cpu/unix/cpu.c')
| -rw-r--r-- | c/src/exec/score/cpu/unix/cpu.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/c/src/exec/score/cpu/unix/cpu.c b/c/src/exec/score/cpu/unix/cpu.c index ed94953d58..68397a4e29 100644 --- a/c/src/exec/score/cpu/unix/cpu.c +++ b/c/src/exec/score/cpu/unix/cpu.c @@ -35,7 +35,6 @@ #include <stdio.h> #include <stdlib.h> #include <unistd.h> -#include <string.h> #include <signal.h> #include <time.h> @@ -225,18 +224,28 @@ void _CPU_Context_Initialize( unsigned32 *_stack_base, unsigned32 _size, unsigned32 _new_level, - proc_ptr *_entry_point + void *_entry_point ) { unsigned32 *addr; unsigned32 jmp_addr; - unsigned32 _stack; + unsigned32 _stack_low; /* lowest "stack aligned" address */ + unsigned32 _stack_high; /* highest "stack aligned" address */ unsigned32 _the_size; jmp_addr = (unsigned32) _entry_point; - _stack = ((unsigned32)(_stack_base) + CPU_STACK_ALIGNMENT); - _stack &= ~(CPU_STACK_ALIGNMENT - 1); + /* + * On CPUs with stacks which grow down, we build the stack + * based on the _stack_high address. On CPUs with stacks which + * grow up, we build the stack based on the _stack_low address. + */ + + _stack_low = ((unsigned32)(_stack_base) + CPU_STACK_ALIGNMENT); + _stack_low &= ~(CPU_STACK_ALIGNMENT - 1); + + _stack_high = ((unsigned32)(_stack_base) + _size); + _stack_high &= ~(CPU_STACK_ALIGNMENT - 1); _the_size = _size & ~(CPU_STACK_ALIGNMENT - 1); @@ -250,7 +259,7 @@ void _CPU_Context_Initialize( #if defined(hppa1_1) *(addr + RP_OFF) = jmp_addr; - *(addr + SP_OFF) = (unsigned32)(_stack + CPU_FRAME_SIZE); + *(addr + SP_OFF) = (unsigned32)(_stack_low + CPU_FRAME_SIZE); /* * See if we are using shared libraries by checking @@ -274,8 +283,8 @@ void _CPU_Context_Initialize( asm ("ta 0x03"); /* flush registers */ *(addr + RP_OFF) = jmp_addr + ADDR_ADJ_OFFSET; - *(addr + SP_OFF) = (unsigned32)(_stack +_the_size - CPU_FRAME_SIZE); - *(addr + FP_OFF) = (unsigned32)(_stack +_the_size); + *(addr + SP_OFF) = (unsigned32)(_stack_high - CPU_FRAME_SIZE); + *(addr + FP_OFF) = (unsigned32)(_stack_high); #else #error "UNKNOWN CPU!!!" #endif |