/* * 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)