| /* |
| * Copyright 2014, Michael Ellerman, IBM Corp. |
| * Licensed under GPLv2. |
| */ |
| |
| #include <ppc-asm.h> |
| #include "reg.h" |
| |
| |
| /* ppc-asm.h defines most of the reg aliases, but not r1/r2. */ |
| #define r1 1 |
| #define r2 2 |
| |
| #define RFEBB .long 0x4c000924 |
| |
| /* Stack layout: |
| * |
| * ^ |
| * User stack | |
| * Back chain ------+ <- r1 <-------+ |
| * ... | |
| * Red zone / ABI Gap | |
| * ... | |
| * vr63 <+ | |
| * vr0 | | |
| * VSCR | | |
| * FSCR | | |
| * r31 | Save area | |
| * r0 | | |
| * XER | | |
| * CTR | | |
| * LR | | |
| * CCR <+ | |
| * ... <+ | |
| * LR | Caller frame | |
| * CCR | | |
| * Back chain <+ <- updated r1 --------+ |
| * |
| */ |
| |
| #if defined(_CALL_ELF) && _CALL_ELF == 2 |
| #define ABIGAP 512 |
| #else |
| #define ABIGAP 288 |
| #endif |
| |
| #define NR_GPR 32 |
| #define NR_SPR 6 |
| #define NR_VSR 64 |
| |
| #define SAVE_AREA ((NR_GPR + NR_SPR) * 8 + (NR_VSR * 16)) |
| #define CALLER_FRAME 112 |
| |
| #define STACK_FRAME (ABIGAP + SAVE_AREA + CALLER_FRAME) |
| |
| #define CCR_SAVE (CALLER_FRAME) |
| #define LR_SAVE (CCR_SAVE + 8) |
| #define CTR_SAVE (LR_SAVE + 8) |
| #define XER_SAVE (CTR_SAVE + 8) |
| #define GPR_SAVE(n) (XER_SAVE + 8 + (8 * n)) |
| #define FSCR_SAVE (GPR_SAVE(31) + 8) |
| #define VSCR_SAVE (FSCR_SAVE + 8) |
| #define VSR_SAVE(n) (VSCR_SAVE + 8 + (16 * n)) |
| |
| #define SAVE_GPR(n) std n,GPR_SAVE(n)(r1) |
| #define REST_GPR(n) ld n,GPR_SAVE(n)(r1) |
| #define TRASH_GPR(n) lis n,0xaaaa |
| |
| #define SAVE_VSR(n, b) li b, VSR_SAVE(n); stxvd2x n,b,r1 |
| #define LOAD_VSR(n, b) li b, VSR_SAVE(n); lxvd2x n,b,r1 |
| |
| #define LOAD_REG_IMMEDIATE(reg,expr) \ |
| lis reg,(expr)@highest; \ |
| ori reg,reg,(expr)@higher; \ |
| rldicr reg,reg,32,31; \ |
| oris reg,reg,(expr)@h; \ |
| ori reg,reg,(expr)@l; |
| |
| |
| #if defined(_CALL_ELF) && _CALL_ELF == 2 |
| #define ENTRY_POINT(name) \ |
| .type FUNC_NAME(name),@function; \ |
| .globl FUNC_NAME(name); \ |
| FUNC_NAME(name): |
| |
| #define RESTORE_TOC(name) \ |
| /* Restore our TOC pointer using our entry point */ \ |
| LOAD_REG_IMMEDIATE(r12, name) \ |
| 0: addis r2,r12,(.TOC.-0b)@ha; \ |
| addi r2,r2,(.TOC.-0b)@l; |
| |
| #else |
| #define ENTRY_POINT(name) FUNC_START(name) |
| #define RESTORE_TOC(name) \ |
| /* Restore our TOC pointer via our opd entry */ \ |
| LOAD_REG_IMMEDIATE(r2, name) \ |
| ld r2,8(r2); |
| #endif |
| |
| .text |
| |
| ENTRY_POINT(ebb_handler) |
| stdu r1,-STACK_FRAME(r1) |
| SAVE_GPR(0) |
| mflr r0 |
| std r0,LR_SAVE(r1) |
| mfcr r0 |
| std r0,CCR_SAVE(r1) |
| mfctr r0 |
| std r0,CTR_SAVE(r1) |
| mfxer r0 |
| std r0,XER_SAVE(r1) |
| SAVE_GPR(2) |
| SAVE_GPR(3) |
| SAVE_GPR(4) |
| SAVE_GPR(5) |
| SAVE_GPR(6) |
| SAVE_GPR(7) |
| SAVE_GPR(8) |
| SAVE_GPR(9) |
| SAVE_GPR(10) |
| SAVE_GPR(11) |
| SAVE_GPR(12) |
| SAVE_GPR(13) |
| SAVE_GPR(14) |
| SAVE_GPR(15) |
| SAVE_GPR(16) |
| SAVE_GPR(17) |
| SAVE_GPR(18) |
| SAVE_GPR(19) |
| SAVE_GPR(20) |
| SAVE_GPR(21) |
| SAVE_GPR(22) |
| SAVE_GPR(23) |
| SAVE_GPR(24) |
| SAVE_GPR(25) |
| SAVE_GPR(26) |
| SAVE_GPR(27) |
| SAVE_GPR(28) |
| SAVE_GPR(29) |
| SAVE_GPR(30) |
| SAVE_GPR(31) |
| SAVE_VSR(0, r3) |
| mffs f0 |
| stfd f0, FSCR_SAVE(r1) |
| mfvscr f0 |
| stfd f0, VSCR_SAVE(r1) |
| SAVE_VSR(1, r3) |
| SAVE_VSR(2, r3) |
| SAVE_VSR(3, r3) |
| SAVE_VSR(4, r3) |
| SAVE_VSR(5, r3) |
| SAVE_VSR(6, r3) |
| SAVE_VSR(7, r3) |
| SAVE_VSR(8, r3) |
| SAVE_VSR(9, r3) |
| SAVE_VSR(10, r3) |
| SAVE_VSR(11, r3) |
| SAVE_VSR(12, r3) |
| SAVE_VSR(13, r3) |
| SAVE_VSR(14, r3) |
| SAVE_VSR(15, r3) |
| SAVE_VSR(16, r3) |
| SAVE_VSR(17, r3) |
| SAVE_VSR(18, r3) |
| SAVE_VSR(19, r3) |
| SAVE_VSR(20, r3) |
| SAVE_VSR(21, r3) |
| SAVE_VSR(22, r3) |
| SAVE_VSR(23, r3) |
| SAVE_VSR(24, r3) |
| SAVE_VSR(25, r3) |
| SAVE_VSR(26, r3) |
| SAVE_VSR(27, r3) |
| SAVE_VSR(28, r3) |
| SAVE_VSR(29, r3) |
| SAVE_VSR(30, r3) |
| SAVE_VSR(31, r3) |
| SAVE_VSR(32, r3) |
| SAVE_VSR(33, r3) |
| SAVE_VSR(34, r3) |
| SAVE_VSR(35, r3) |
| SAVE_VSR(36, r3) |
| SAVE_VSR(37, r3) |
| SAVE_VSR(38, r3) |
| SAVE_VSR(39, r3) |
| SAVE_VSR(40, r3) |
| SAVE_VSR(41, r3) |
| SAVE_VSR(42, r3) |
| SAVE_VSR(43, r3) |
| SAVE_VSR(44, r3) |
| SAVE_VSR(45, r3) |
| SAVE_VSR(46, r3) |
| SAVE_VSR(47, r3) |
| SAVE_VSR(48, r3) |
| SAVE_VSR(49, r3) |
| SAVE_VSR(50, r3) |
| SAVE_VSR(51, r3) |
| SAVE_VSR(52, r3) |
| SAVE_VSR(53, r3) |
| SAVE_VSR(54, r3) |
| SAVE_VSR(55, r3) |
| SAVE_VSR(56, r3) |
| SAVE_VSR(57, r3) |
| SAVE_VSR(58, r3) |
| SAVE_VSR(59, r3) |
| SAVE_VSR(60, r3) |
| SAVE_VSR(61, r3) |
| SAVE_VSR(62, r3) |
| SAVE_VSR(63, r3) |
| |
| TRASH_GPR(2) |
| TRASH_GPR(3) |
| TRASH_GPR(4) |
| TRASH_GPR(5) |
| TRASH_GPR(6) |
| TRASH_GPR(7) |
| TRASH_GPR(8) |
| TRASH_GPR(9) |
| TRASH_GPR(10) |
| TRASH_GPR(11) |
| TRASH_GPR(12) |
| TRASH_GPR(14) |
| TRASH_GPR(15) |
| TRASH_GPR(16) |
| TRASH_GPR(17) |
| TRASH_GPR(18) |
| TRASH_GPR(19) |
| TRASH_GPR(20) |
| TRASH_GPR(21) |
| TRASH_GPR(22) |
| TRASH_GPR(23) |
| TRASH_GPR(24) |
| TRASH_GPR(25) |
| TRASH_GPR(26) |
| TRASH_GPR(27) |
| TRASH_GPR(28) |
| TRASH_GPR(29) |
| TRASH_GPR(30) |
| TRASH_GPR(31) |
| |
| RESTORE_TOC(ebb_handler) |
| |
| /* |
| * r13 is our TLS pointer. We leave whatever value was in there when the |
| * EBB fired. That seems to be OK because once set the TLS pointer is not |
| * changed - but presumably that could change in future. |
| */ |
| |
| bl ebb_hook |
| nop |
| |
| /* r2 may be changed here but we don't care */ |
| |
| lfd f0, FSCR_SAVE(r1) |
| mtfsf 0xff,f0 |
| lfd f0, VSCR_SAVE(r1) |
| mtvscr f0 |
| LOAD_VSR(0, r3) |
| LOAD_VSR(1, r3) |
| LOAD_VSR(2, r3) |
| LOAD_VSR(3, r3) |
| LOAD_VSR(4, r3) |
| LOAD_VSR(5, r3) |
| LOAD_VSR(6, r3) |
| LOAD_VSR(7, r3) |
| LOAD_VSR(8, r3) |
| LOAD_VSR(9, r3) |
| LOAD_VSR(10, r3) |
| LOAD_VSR(11, r3) |
| LOAD_VSR(12, r3) |
| LOAD_VSR(13, r3) |
| LOAD_VSR(14, r3) |
| LOAD_VSR(15, r3) |
| LOAD_VSR(16, r3) |
| LOAD_VSR(17, r3) |
| LOAD_VSR(18, r3) |
| LOAD_VSR(19, r3) |
| LOAD_VSR(20, r3) |
| LOAD_VSR(21, r3) |
| LOAD_VSR(22, r3) |
| LOAD_VSR(23, r3) |
| LOAD_VSR(24, r3) |
| LOAD_VSR(25, r3) |
| LOAD_VSR(26, r3) |
| LOAD_VSR(27, r3) |
| LOAD_VSR(28, r3) |
| LOAD_VSR(29, r3) |
| LOAD_VSR(30, r3) |
| LOAD_VSR(31, r3) |
| LOAD_VSR(32, r3) |
| LOAD_VSR(33, r3) |
| LOAD_VSR(34, r3) |
| LOAD_VSR(35, r3) |
| LOAD_VSR(36, r3) |
| LOAD_VSR(37, r3) |
| LOAD_VSR(38, r3) |
| LOAD_VSR(39, r3) |
| LOAD_VSR(40, r3) |
| LOAD_VSR(41, r3) |
| LOAD_VSR(42, r3) |
| LOAD_VSR(43, r3) |
| LOAD_VSR(44, r3) |
| LOAD_VSR(45, r3) |
| LOAD_VSR(46, r3) |
| LOAD_VSR(47, r3) |
| LOAD_VSR(48, r3) |
| LOAD_VSR(49, r3) |
| LOAD_VSR(50, r3) |
| LOAD_VSR(51, r3) |
| LOAD_VSR(52, r3) |
| LOAD_VSR(53, r3) |
| LOAD_VSR(54, r3) |
| LOAD_VSR(55, r3) |
| LOAD_VSR(56, r3) |
| LOAD_VSR(57, r3) |
| LOAD_VSR(58, r3) |
| LOAD_VSR(59, r3) |
| LOAD_VSR(60, r3) |
| LOAD_VSR(61, r3) |
| LOAD_VSR(62, r3) |
| LOAD_VSR(63, r3) |
| |
| ld r0,XER_SAVE(r1) |
| mtxer r0 |
| ld r0,CTR_SAVE(r1) |
| mtctr r0 |
| ld r0,LR_SAVE(r1) |
| mtlr r0 |
| ld r0,CCR_SAVE(r1) |
| mtcr r0 |
| REST_GPR(0) |
| REST_GPR(2) |
| REST_GPR(3) |
| REST_GPR(4) |
| REST_GPR(5) |
| REST_GPR(6) |
| REST_GPR(7) |
| REST_GPR(8) |
| REST_GPR(9) |
| REST_GPR(10) |
| REST_GPR(11) |
| REST_GPR(12) |
| REST_GPR(13) |
| REST_GPR(14) |
| REST_GPR(15) |
| REST_GPR(16) |
| REST_GPR(17) |
| REST_GPR(18) |
| REST_GPR(19) |
| REST_GPR(20) |
| REST_GPR(21) |
| REST_GPR(22) |
| REST_GPR(23) |
| REST_GPR(24) |
| REST_GPR(25) |
| REST_GPR(26) |
| REST_GPR(27) |
| REST_GPR(28) |
| REST_GPR(29) |
| REST_GPR(30) |
| REST_GPR(31) |
| addi r1,r1,STACK_FRAME |
| RFEBB |
| FUNC_END(ebb_handler) |
