| 180 |
|
isync |
| 181 |
|
lwarx r5,0,r3 |
| 182 |
|
cmpi 0,r5,0x0000 |
| 183 |
< |
beq 1f |
| 183 |
> |
bne 1f |
| 184 |
|
stwcx. r4,0,r3 |
| 185 |
|
bne- 0b |
| 186 |
|
1: isync |
| 245 |
|
// Restore PowerPC registers |
| 246 |
|
lwz r1,XLM_EMUL_RETURN_STACK(0) |
| 247 |
|
RESTORE_SYSTEM_R2 |
| 248 |
– |
RESTORE_SYSTEM_R13 |
| 248 |
|
lmw r13,20(r1) |
| 249 |
|
lfd f14,20+19*4+0*8(r1) |
| 250 |
|
lfd f15,20+19*4+1*8(r1) |
| 709 |
|
* Native resource manager patches |
| 710 |
|
*/ |
| 711 |
|
|
| 712 |
< |
ASM_MACRO_START do_get_resource XLM_OLD_GET_RESOURCE |
| 712 |
> |
ASM_MACRO_START do_get_resource ASM_MACRO_ARG0_DEF |
| 713 |
|
// Create stack frame |
| 714 |
|
mflr r0 |
| 715 |
|
stw r0,8(r1) |
| 720 |
|
stw r4,56+4(r1) |
| 721 |
|
|
| 722 |
|
// Call old routine |
| 723 |
< |
lwz r0,\XLM_OLD_GET_RESOURCE(0) |
| 723 |
> |
lwz r0,ASM_MACRO_ARG0(0) |
| 724 |
|
lwz r2,XLM_RES_LIB_TOC(0) |
| 725 |
|
mtctr r0 |
| 726 |
|
bctrl |
| 762 |
|
C_SYMBOL_NAME(r_get_resource): |
| 763 |
|
do_get_resource XLM_R_GET_RESOURCE |
| 764 |
|
|
| 765 |
+ |
ASM_MACRO_START do_get_named_resource ASM_MACRO_ARG0_DEF |
| 766 |
+ |
// Create stack frame |
| 767 |
+ |
mflr r0 |
| 768 |
+ |
stw r0,8(r1) |
| 769 |
+ |
stwu r1,-(56+12)(r1) |
| 770 |
+ |
|
| 771 |
+ |
// Save type/ID |
| 772 |
+ |
stw r3,56(r1) |
| 773 |
+ |
stw r4,56+4(r1) |
| 774 |
+ |
|
| 775 |
+ |
// Call old routine |
| 776 |
+ |
lwz r0,ASM_MACRO_ARG0(0) |
| 777 |
+ |
lwz r2,XLM_RES_LIB_TOC(0) |
| 778 |
+ |
mtctr r0 |
| 779 |
+ |
bctrl |
| 780 |
+ |
stw r3,56+8(r1) // Save handle |
| 781 |
+ |
|
| 782 |
+ |
// Call CheckLoad |
| 783 |
+ |
RESTORE_SYSTEM_R2 |
| 784 |
+ |
RESTORE_SYSTEM_R13 |
| 785 |
+ |
lwz r3,56(r1) |
| 786 |
+ |
lwz r4,56+4(r1) |
| 787 |
+ |
lwz r5,56+8(r1) |
| 788 |
+ |
bl C_SYMBOL_NAME(named_check_load_invoc) |
| 789 |
+ |
lwz r3,56+8(r1) // Restore handle |
| 790 |
+ |
|
| 791 |
+ |
// Return to caller |
| 792 |
+ |
lwz r0,56+12+8(r1) |
| 793 |
+ |
mtlr r0 |
| 794 |
+ |
addi r1,r1,56+12 |
| 795 |
+ |
blr |
| 796 |
+ |
ASM_MACRO_END |
| 797 |
+ |
|
| 798 |
+ |
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_named_resource) |
| 799 |
+ |
C_SYMBOL_NAME(get_named_resource): |
| 800 |
+ |
do_get_named_resource XLM_GET_NAMED_RESOURCE |
| 801 |
+ |
|
| 802 |
+ |
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_1_named_resource) |
| 803 |
+ |
C_SYMBOL_NAME(get_1_named_resource): |
| 804 |
+ |
do_get_named_resource XLM_GET_1_NAMED_RESOURCE |
| 805 |
+ |
|
| 806 |
|
|
| 807 |
|
/* |
| 808 |
|
* void ppc_interrupt(uint32 entry{r3}, uint32 kernel_data{r4}) - Execute PPC interrupt |
| 851 |
|
// Enter nanokernel |
| 852 |
|
mtlr r3 |
| 853 |
|
blr |
| 854 |
+ |
|
| 855 |
+ |
|
| 856 |
+ |
/* |
| 857 |
+ |
* Define signal handlers with alternate stack initialization magic |
| 858 |
+ |
*/ |
| 859 |
+ |
|
| 860 |
+ |
#define SIG_STACK_SIZE 0x10000 |
| 861 |
+ |
|
| 862 |
+ |
ASM_MACRO_START do_define_signal_handler \ |
| 863 |
+ |
ASM_MACRO_ARG0_DEF /* name */ \ |
| 864 |
+ |
ASM_MACRO_ARG1_DEF /* stack */ \ |
| 865 |
+ |
ASM_MACRO_ARG2_DEF /* stack id */ \ |
| 866 |
+ |
ASM_MACRO_ARG3_DEF /* signal handler */ |
| 867 |
+ |
|
| 868 |
+ |
// Alternate stack lower base for this signal handler |
| 869 |
+ |
.lcomm ASM_MACRO_ARG1,SIG_STACK_SIZE,ASM_ALIGN_2(4) |
| 870 |
+ |
ASM_TYPE(ASM_MACRO_ARG1,@object) |
| 871 |
+ |
|
| 872 |
+ |
// Represents the current nest level for this signal handler |
| 873 |
+ |
// Note that in SheepShaver, SIGUSR2 signals are blocked while |
| 874 |
+ |
// handling other signals so, it's unlikely we ever get a nest |
| 875 |
+ |
// level greater than 1 |
| 876 |
+ |
.lcomm ASM_MACRO_ARG2,4,ASM_ALIGN_2(2) |
| 877 |
+ |
ASM_TYPE(ASM_MACRO_ARG2,@object) |
| 878 |
+ |
|
| 879 |
+ |
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(ASM_MACRO_ARG0) |
| 880 |
+ |
C_SYMBOL_NAME(ASM_MACRO_ARG0): |
| 881 |
+ |
// Preserve args in scratch registers |
| 882 |
+ |
mflr r14 |
| 883 |
+ |
mr r15,r3 |
| 884 |
+ |
mr r16,r4 |
| 885 |
+ |
mr r17,r5 |
| 886 |
+ |
mr r18,r1 |
| 887 |
+ |
|
| 888 |
+ |
// Atomically increase stack_id |
| 889 |
+ |
lis r19,ASM_HA16(ASM_MACRO_ARG2) |
| 890 |
+ |
la r19,ASM_LO16(ASM_MACRO_ARG2,r19) |
| 891 |
+ |
li r4,1 |
| 892 |
+ |
mr r3,r19 |
| 893 |
+ |
bl C_SYMBOL_NAME(atomic_add) |
| 894 |
+ |
cmpwi r3,0 |
| 895 |
+ |
bne- 1f |
| 896 |
+ |
|
| 897 |
+ |
// ID was 0, we can use the local stack |
| 898 |
+ |
lis r9,ASM_HA16(ASM_MACRO_ARG1) |
| 899 |
+ |
lis r3,(SIG_STACK_SIZE>>16) |
| 900 |
+ |
la r9,ASM_LO16(ASM_MACRO_ARG1,r9) |
| 901 |
+ |
addi r3,r3,((SIG_STACK_SIZE&0xffff)-64) |
| 902 |
+ |
add r1,r9,r3 |
| 903 |
+ |
|
| 904 |
+ |
1: // Invoke signal handler |
| 905 |
+ |
stwu r1,-16(r1) |
| 906 |
+ |
mr r3,r15 |
| 907 |
+ |
mr r4,r16 |
| 908 |
+ |
mr r5,r17 |
| 909 |
+ |
bl C_SYMBOL_NAME(ASM_MACRO_ARG3) |
| 910 |
+ |
addi r1,r1,16 |
| 911 |
+ |
|
| 912 |
+ |
// Atomically decrease stack id |
| 913 |
+ |
mr r3,r19 |
| 914 |
+ |
li r4,-1 |
| 915 |
+ |
bl C_SYMBOL_NAME(atomic_add) |
| 916 |
+ |
|
| 917 |
+ |
// Restore kernel stack and return |
| 918 |
+ |
mtlr r14 |
| 919 |
+ |
mr r1,r18 |
| 920 |
+ |
blr |
| 921 |
+ |
ASM_MACRO_END |
| 922 |
+ |
|
| 923 |
+ |
#define DEFINE_SIGNAL_HANDLER(NAME) \ |
| 924 |
+ |
do_define_signal_handler \ |
| 925 |
+ |
NAME##_handler_init ASM_MACRO_ARG_SEP \ |
| 926 |
+ |
NAME##_stack ASM_MACRO_ARG_SEP \ |
| 927 |
+ |
NAME##_stack_id ASM_MACRO_ARG_SEP \ |
| 928 |
+ |
NAME##_handler |
| 929 |
+ |
|
| 930 |
+ |
DEFINE_SIGNAL_HANDLER(sigusr2) |
