forked from ariadne/libucontext
arch: ppc: new port
William Pitcock
parent
66919bb222
commit
f3fe8ea781
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@ -17,3 +17,4 @@ Right now these archs are supported:
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* x86_64
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* armv6+ (`arm`)
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* aarch64
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* ppc
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@ -0,0 +1,62 @@
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#ifndef __ARCH_PPC_DEFS_H
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#define __ARCH_PPC_DEFS_H
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#define REG_R0 (0)
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#define REG_R1 (1)
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#define REG_R2 (2)
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#define REG_R3 (3)
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#define REG_R4 (4)
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#define REG_R5 (5)
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#define REG_R6 (6)
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#define REG_R7 (7)
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#define REG_R8 (8)
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#define REG_R9 (9)
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#define REG_R10 (10)
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#define REG_R11 (11)
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#define REG_R12 (12)
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#define REG_R13 (13)
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#define REG_R14 (14)
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#define REG_R15 (15)
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#define REG_R16 (16)
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#define REG_R17 (17)
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#define REG_R18 (18)
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#define REG_R19 (19)
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#define REG_R20 (20)
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#define REG_R21 (21)
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#define REG_R22 (22)
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#define REG_R23 (23)
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#define REG_R24 (24)
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#define REG_R25 (25)
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#define REG_R26 (26)
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#define REG_R27 (27)
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#define REG_R28 (28)
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#define REG_R29 (29)
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#define REG_R30 (30)
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#define REG_R31 (31)
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#define REG_R32 (32)
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#define REG_R33 (33)
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#define REG_R34 (34)
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#define REG_R35 (35)
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#define REG_R36 (36)
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#define REG_R37 (37)
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#define REG_R38 (38)
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#define REG_R39 (39)
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#define REG_R40 (40)
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#define REG_R41 (41)
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#define REG_R42 (42)
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#define REG_R43 (43)
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#define REG_R44 (44)
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#define REG_R45 (45)
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#define REG_R46 (46)
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#define REG_R47 (47)
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/* sp register is actually %r1 */
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#define REG_SP REG_R1
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/* nip register is actually %srr0 (r32) */
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#define REG_NIP REG_R32
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/* lnk register is actually r32 */
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#define REG_LNK REG_R36
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#endif
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@ -0,0 +1,45 @@
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/*
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* Copyright (c) 2018 William Pitcock <nenolod@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#define _GNU_SOURCE
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#include <stddef.h>
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#include <stdarg.h>
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#include <signal.h>
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#include <string.h>
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#include <stdint.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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int
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__getcontext(ucontext_t *ucp)
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{
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#ifdef SYS_swapcontext
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int r;
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r = syscall(SYS_swapcontext, ucp, NULL, sizeof(ucontext_t));
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if (r < 0)
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{
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errno = -r;
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return -1;
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}
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return 0;
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#else
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errno = ENOSYS;
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return -1;
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#endif
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}
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extern __typeof(__getcontext) getcontext __attribute__((weak, __alias__("__getcontext")));
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@ -0,0 +1,75 @@
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/*
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* Copyright (c) 2018 William Pitcock <nenolod@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#define _GNU_SOURCE
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#include <stddef.h>
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#include <stdarg.h>
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#include <signal.h>
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#include <string.h>
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#include <stdint.h>
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#include "defs.h"
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extern void __start_context(void);
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void
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__makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
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{
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greg_t *sp, *argp;
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va_list va;
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int i;
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unsigned int uc_link, stack_args;
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stack_args = argc > 8 ? argc - 8 : 0;
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uc_link = stack_args + 1;
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sp = (greg_t *) ((uintptr_t) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size);
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sp -= (uc_link + 1);
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sp = (greg_t *) (((uintptr_t) sp & -16L) - 8);
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ucp->uc_mcontext.gregs[REG_NIP] = (uintptr_t) func;
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ucp->uc_mcontext.gregs[REG_LNK] = (uintptr_t) &__start_context;
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ucp->uc_mcontext.gregs[REG_R31] = (uintptr_t) ucp->uc_link;
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ucp->uc_mcontext.gregs[REG_SP] = (uintptr_t) sp;
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sp[0] = (uintptr_t) &__start_context;
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sp[uc_link] = (uintptr_t) ucp->uc_link;
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argp = &sp[2];
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va_start(va, argc);
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for (i = 0; i < argc; i++)
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switch (i)
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{
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case 0:
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case 1:
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case 2:
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case 3:
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case 4:
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case 5:
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case 6:
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case 7:
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ucp->uc_mcontext.gregs[i + 3] = va_arg (va, greg_t);
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break;
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default:
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*argp++ = va_arg (va, greg_t);
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break;
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}
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va_end(va);
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}
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extern __typeof(__makecontext) makecontext __attribute__((weak, __alias__("__makecontext")));
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@ -0,0 +1,45 @@
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/*
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* Copyright (c) 2018 William Pitcock <nenolod@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#define _GNU_SOURCE
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#include <stddef.h>
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#include <stdarg.h>
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#include <signal.h>
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#include <string.h>
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#include <stdint.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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int
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__setcontext(const ucontext_t *ucp)
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{
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#ifdef SYS_swapcontext
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int r;
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r = syscall(SYS_swapcontext, NULL, (void *) ucp, sizeof(ucontext_t));
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if (r < 0)
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{
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errno = -r;
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return -1;
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}
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return r;
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#else
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errno = ENOSYS;
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return -1;
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#endif
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}
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extern __typeof(__setcontext) setcontext __attribute__((weak, __alias__("__setcontext")));
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@ -0,0 +1,21 @@
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/*
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* Copyright (c) 2018 William Pitcock <nenolod@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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.globl __start_context;
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__start_context:
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/* get the proper context into position and test for NULL */
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mr. 3,31
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beq hosed
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bl __setcontext@local
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hosed:
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b exit@GOT
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@ -0,0 +1,45 @@
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/*
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* Copyright (c) 2018 William Pitcock <nenolod@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#define _GNU_SOURCE
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#include <stddef.h>
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#include <stdarg.h>
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#include <signal.h>
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#include <string.h>
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#include <stdint.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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int
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__swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
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{
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#ifdef SYS_swapcontext
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int r;
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r = syscall(SYS_swapcontext, oucp, ucp, sizeof(ucontext_t));
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if (r < 0)
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{
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errno = -r;
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return -1;
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}
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return r;
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#else
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errno = ENOSYS;
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return -1;
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#endif
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}
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extern __typeof(__swapcontext) swapcontext __attribute__((weak, __alias__("__swapcontext")));
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