diff options
Diffstat (limited to 'emu/Linux/asm-power.S')
| -rw-r--r-- | emu/Linux/asm-power.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/emu/Linux/asm-power.S b/emu/Linux/asm-power.S new file mode 100644 index 00000000..ff5f97cd --- /dev/null +++ b/emu/Linux/asm-power.S @@ -0,0 +1,72 @@ +#include <asm-ppc/reg.h> + + .file "asm-power.S" + .section ".text" + .align 2 + .globl FPsave + .type FPsave, @function +FPsave: + .set _framesize,0 + mffs f0 + stfd f0,0(r3) + blr + .size FPsave,.-FPsave + + .align 2 + .globl FPrestore +FPrestore: + lfd f0,0(r3) + mtfsf 0xff,f0 + blr + .size FPrestore, .-FPrestore + + .align 2 + .globl _tas +_tas: + sync + mr r4,r3 + addi r5,0,0x1 +1: + lwarx r3,0,r4 + cmpwi r3,0x0 + bne- 2f + stwcx. r5,0,r4 + bne- 1b /* Lost reservation, try again */ +2: + sync + blr + .size _tas,.-_tas + +/* + * void executeonnewstack(void *tos, void (*tramp)(void *arg), void *arg) + */ + .align 2 + .globl executeonnewstack: +executeonnewstack: + mr r1,r3 /* change stacks */ + stwu 1,-16(r1) /* save lr to aid the traceback */ + li r0,0 + stw r0,20(r1) + mr r3,r5 + mtctr r4 + bctrl /* tramp(arg) */ + br . /* failed */ + .size executeonnewstack,.-executeonnewstack + +/* + * void unlockandexit(int *key) + * + * NB: the return status may be garbaged if the stack is reused + * between the unlock and the system call, but this should + * not matter since no task is waiting for the result + */ + .align 2 + .globl unlockandexit +unlockandexit: + li r0,0x0 + stw r0,0(r3) /* unlock */ + li r0,1 /* sys exit; 234 is exit group */ + li r3,0 /* exit status */ + sc + br . /* not reached */ + .size unlockandexit,.-unlockandexit |