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/* Implementation of stack swtiching routines for OpenPOWER 64-bit ELF ABI
The specification can be found at
http://openpowerfoundation.org/wp-content/uploads/resources/leabi/content/ch_preface.html
This ABI is usually used by the ppc64le targets.
*/
#include "psm.h"
.text
.abiversion 2
.globl rust_psm_stack_direction
.p2align 4
.type rust_psm_stack_direction,@function
rust_psm_stack_direction:
/* extern "C" fn() -> u8 */
.cfi_startproc
li 3, STACK_DIRECTION_DESCENDING
blr
.rust_psm_stack_direction_end:
.size rust_psm_stack_direction,.rust_psm_stack_direction_end-rust_psm_stack_direction
.cfi_endproc
.globl rust_psm_stack_pointer
.p2align 4
.type rust_psm_stack_pointer,@function
rust_psm_stack_pointer:
/* extern "C" fn() -> *mut u8 */
.cfi_startproc
mr 3, 1
blr
.rust_psm_stack_pointer_end:
.size rust_psm_stack_pointer,.rust_psm_stack_pointer_end-rust_psm_stack_pointer
.cfi_endproc
.globl rust_psm_replace_stack
.p2align 4
.type rust_psm_replace_stack,@function
rust_psm_replace_stack:
/* extern "C" fn(3: usize, 4: extern "C" fn(usize), 5: *mut u8) */
.cfi_startproc
addi 5, 5, -32
mtctr 4
mr 12, 4
mr 1, 5
bctr
.rust_psm_replace_stack_end:
.size rust_psm_replace_stack,.rust_psm_replace_stack_end-rust_psm_replace_stack
.cfi_endproc
.globl rust_psm_on_stack
.p2align 4
.type rust_psm_on_stack,@function
rust_psm_on_stack:
/* extern "C" fn(3: usize, 4: usize, 5: extern "C" fn(usize, usize), 6: *mut u8) */
.cfi_startproc
mflr 0
std 0, -8(6)
std 2, -24(6)
sub 6, 6, 1
addi 6, 6, -48
stdux 1, 1, 6
.cfi_def_cfa r1, 48
.cfi_offset r1, -48
.cfi_offset r2, -24
.cfi_offset lr, -8
mr 12, 5
mtctr 5
bctrl
ld 2, 24(1)
.cfi_restore r2
ld 0, 40(1)
mtlr 0
.cfi_restore lr
/* FIXME: after this instructin backtrace breaks until control returns to the caller */
ld 1, 0(1)
blr
.rust_psm_on_stack_end:
.size rust_psm_on_stack,.rust_psm_on_stack_end-rust_psm_on_stack
.cfi_endproc
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