diff options
Diffstat (limited to 'system/libucontext/ppc64-assembly.patch')
| -rw-r--r-- | system/libucontext/ppc64-assembly.patch | 331 |
1 files changed, 0 insertions, 331 deletions
diff --git a/system/libucontext/ppc64-assembly.patch b/system/libucontext/ppc64-assembly.patch deleted file mode 100644 index 66fb3104d..000000000 --- a/system/libucontext/ppc64-assembly.patch +++ /dev/null @@ -1,331 +0,0 @@ -From 7b864e86e3e8e64fe69363137384ee9b858fe78d Mon Sep 17 00:00:00 2001 -From: Bobby Bingham <koorogi@koorogi.info> -Date: Sat, 23 Feb 2019 17:12:37 -0600 -Subject: [PATCH 2/3] ppc64: rewrite get/set/swapcontext in assembly - -If getcontext makes any function call, which it does to call syscall, then -it must spill its return address to the stack. After it returns to its -caller, that return address can be clobbered. When setcontext is called -to resume this saved context, the correct return address is not available. ---- - Makefile | 10 ++------- - arch/ppc64/getcontext.S | 25 +++++++++++++++++++++ - arch/ppc64/getcontext.c | 45 ------------------------------------- - arch/ppc64/retfromsyscall.c | 24 ++++++++++++++++++++ - arch/ppc64/setcontext.S | 26 +++++++++++++++++++++ - arch/ppc64/setcontext.c | 45 ------------------------------------- - arch/ppc64/swapcontext.S | 28 +++++++++++++++++++++++ - arch/ppc64/swapcontext.c | 45 ------------------------------------- - 8 files changed, 105 insertions(+), 143 deletions(-) - create mode 100644 arch/ppc64/getcontext.S - delete mode 100644 arch/ppc64/getcontext.c - create mode 100644 arch/ppc64/retfromsyscall.c - create mode 100644 arch/ppc64/setcontext.S - delete mode 100644 arch/ppc64/setcontext.c - create mode 100644 arch/ppc64/swapcontext.S - delete mode 100644 arch/ppc64/swapcontext.c - -diff --git a/Makefile b/Makefile -index 51365a3..d6ff1b0 100644 ---- a/Makefile -+++ b/Makefile -@@ -2,14 +2,8 @@ ARCH := $(shell uname -m) - - CFLAGS = -ggdb3 -O2 -Wall -Iarch/${ARCH} - --LIBUCONTEXT_C_SRC = \ -- arch/${ARCH}/makecontext.c -- --LIBUCONTEXT_S_SRC = \ -- arch/${ARCH}/getcontext.S \ -- arch/${ARCH}/setcontext.S \ -- arch/${ARCH}/swapcontext.S \ -- arch/${ARCH}/startcontext.S -+LIBUCONTEXT_C_SRC = $(wildcard arch/${ARCH}/*.c) -+LIBUCONTEXT_S_SRC = $(wildcard arch/${ARCH}/*.S) - - LIBUCONTEXT_OBJ = ${LIBUCONTEXT_C_SRC:.c=.o} ${LIBUCONTEXT_S_SRC:.S=.o} - LIBUCONTEXT_SOVERSION = 0 -diff --git a/arch/ppc64/getcontext.S b/arch/ppc64/getcontext.S -new file mode 100644 -index 0000000..935edd2 ---- /dev/null -+++ b/arch/ppc64/getcontext.S -@@ -0,0 +1,25 @@ -+/* -+ * Copyright (c) 2019 Bobby Bingham <koorogi@koorogi.info> -+ * -+ * Permission to use, copy, modify, and/or distribute this software for any -+ * purpose with or without fee is hereby granted, provided that the above -+ * copyright notice and this permission notice appear in all copies. -+ * -+ * This software is provided 'as is' and without any warranty, express or -+ * implied. In no event shall the authors be liable for any damages arising -+ * from the use of this software. -+ */ -+ -+.global __getcontext -+.hidden __swapcontext -+__getcontext: -+ addis 2, 12, .TOC.-__getcontext@ha -+ addi 2, 12, .TOC.-__getcontext@l -+ -+ .localentry __getcontext,.-__getcontext -+ -+ li 4, 0 -+ b __swapcontext -+ -+.weak getcontext -+getcontext = __getcontext -diff --git a/arch/ppc64/getcontext.c b/arch/ppc64/getcontext.c -deleted file mode 100644 -index 5da9dfb..0000000 ---- a/arch/ppc64/getcontext.c -+++ /dev/null -@@ -1,45 +0,0 @@ --/* -- * Copyright (c) 2018 William Pitcock <nenolod@dereferenced.org> -- * -- * Permission to use, copy, modify, and/or distribute this software for any -- * purpose with or without fee is hereby granted, provided that the above -- * copyright notice and this permission notice appear in all copies. -- * -- * This software is provided 'as is' and without any warranty, express or -- * implied. In no event shall the authors be liable for any damages arising -- * from the use of this software. -- */ -- --#define _GNU_SOURCE --#include <stddef.h> --#include <stdarg.h> --#include <signal.h> --#include <string.h> --#include <stdint.h> --#include <errno.h> --#include <unistd.h> --#include <sys/syscall.h> -- -- --int --__getcontext(ucontext_t *ucp) --{ --#ifdef SYS_swapcontext -- int r; -- -- r = syscall(SYS_swapcontext, ucp, NULL, sizeof(ucontext_t)); -- if (r < 0) -- { -- errno = -r; -- return -1; -- } -- -- return 0; --#else -- errno = ENOSYS; -- return -1; --#endif --} -- -- --extern __typeof(__getcontext) getcontext __attribute__((weak, __alias__("__getcontext"))); -diff --git a/arch/ppc64/retfromsyscall.c b/arch/ppc64/retfromsyscall.c -new file mode 100644 -index 0000000..22c5134 ---- /dev/null -+++ b/arch/ppc64/retfromsyscall.c -@@ -0,0 +1,24 @@ -+/* -+ * Copyright (c) 2019 Bobby Bingham <koorogi@koorogi.info> -+ * -+ * Permission to use, copy, modify, and/or distribute this software for any -+ * purpose with or without fee is hereby granted, provided that the above -+ * copyright notice and this permission notice appear in all copies. -+ * -+ * This software is provided 'as is' and without any warranty, express or -+ * implied. In no event shall the authors be liable for any damages arising -+ * from the use of this software. -+ */ -+ -+#include <errno.h> -+ -+__attribute__ ((visibility ("hidden"))) -+int __retfromsyscall(long retval) -+{ -+ if (retval < 0) { -+ errno = -retval; -+ return -1; -+ } -+ return 0; -+} -+ -diff --git a/arch/ppc64/setcontext.S b/arch/ppc64/setcontext.S -new file mode 100644 -index 0000000..5a0cde3 ---- /dev/null -+++ b/arch/ppc64/setcontext.S -@@ -0,0 +1,26 @@ -+/* -+ * Copyright (c) 2019 Bobby Bingham <koorogi@koorogi.info> -+ * -+ * Permission to use, copy, modify, and/or distribute this software for any -+ * purpose with or without fee is hereby granted, provided that the above -+ * copyright notice and this permission notice appear in all copies. -+ * -+ * This software is provided 'as is' and without any warranty, express or -+ * implied. In no event shall the authors be liable for any damages arising -+ * from the use of this software. -+ */ -+ -+.global __setcontext -+.hidden __swapcontext -+__setcontext: -+ addis 2, 12, .TOC.-__setcontext@ha -+ addi 2, 12, .TOC.-__setcontext@l -+ -+ .localentry __setcontext,.-__setcontext -+ -+ mr 4, 3 -+ li 3, 0 -+ b __swapcontext -+ -+.weak setcontext -+setcontext = __setcontext -diff --git a/arch/ppc64/setcontext.c b/arch/ppc64/setcontext.c -deleted file mode 100644 -index 59c65b4..0000000 ---- a/arch/ppc64/setcontext.c -+++ /dev/null -@@ -1,45 +0,0 @@ --/* -- * Copyright (c) 2018 William Pitcock <nenolod@dereferenced.org> -- * -- * Permission to use, copy, modify, and/or distribute this software for any -- * purpose with or without fee is hereby granted, provided that the above -- * copyright notice and this permission notice appear in all copies. -- * -- * This software is provided 'as is' and without any warranty, express or -- * implied. In no event shall the authors be liable for any damages arising -- * from the use of this software. -- */ -- --#define _GNU_SOURCE --#include <stddef.h> --#include <stdarg.h> --#include <signal.h> --#include <string.h> --#include <stdint.h> --#include <errno.h> --#include <unistd.h> --#include <sys/syscall.h> -- -- --int --__setcontext(const ucontext_t *ucp) --{ --#ifdef SYS_swapcontext -- int r; -- -- r = syscall(SYS_swapcontext, NULL, (void *) ucp, sizeof(ucontext_t)); -- if (r < 0) -- { -- errno = -r; -- return -1; -- } -- -- return r; --#else -- errno = ENOSYS; -- return -1; --#endif --} -- -- --extern __typeof(__setcontext) setcontext __attribute__((weak, __alias__("__setcontext"))); -diff --git a/arch/ppc64/swapcontext.S b/arch/ppc64/swapcontext.S -new file mode 100644 -index 0000000..982537a ---- /dev/null -+++ b/arch/ppc64/swapcontext.S -@@ -0,0 +1,28 @@ -+/* -+ * Copyright (c) 2019 Bobby Bingham <koorogi@koorogi.info> -+ * -+ * Permission to use, copy, modify, and/or distribute this software for any -+ * purpose with or without fee is hereby granted, provided that the above -+ * copyright notice and this permission notice appear in all copies. -+ * -+ * This software is provided 'as is' and without any warranty, express or -+ * implied. In no event shall the authors be liable for any damages arising -+ * from the use of this software. -+ */ -+ -+.global __swapcontext -+__swapcontext: -+ addis 2, 12, .TOC.-__swapcontext@ha -+ addi 2, 12, .TOC.-__swapcontext@l -+ -+ .localentry __swapcontext,.-__swapcontext -+ -+ li 0, 249 # SYS_swapcontext -+ li 5, 1696 # sizeof(ucontext_t) -+ sc -+ -+.hidden __retfromsyscall -+ b __retfromsyscall -+ -+.weak swapcontext -+swapcontext = __swapcontext -diff --git a/arch/ppc64/swapcontext.c b/arch/ppc64/swapcontext.c -deleted file mode 100644 -index af14bc2..0000000 ---- a/arch/ppc64/swapcontext.c -+++ /dev/null -@@ -1,45 +0,0 @@ --/* -- * Copyright (c) 2018 William Pitcock <nenolod@dereferenced.org> -- * -- * Permission to use, copy, modify, and/or distribute this software for any -- * purpose with or without fee is hereby granted, provided that the above -- * copyright notice and this permission notice appear in all copies. -- * -- * This software is provided 'as is' and without any warranty, express or -- * implied. In no event shall the authors be liable for any damages arising -- * from the use of this software. -- */ -- --#define _GNU_SOURCE --#include <stddef.h> --#include <stdarg.h> --#include <signal.h> --#include <string.h> --#include <stdint.h> --#include <errno.h> --#include <unistd.h> --#include <sys/syscall.h> -- -- --int --__swapcontext(ucontext_t *oucp, const ucontext_t *ucp) --{ --#ifdef SYS_swapcontext -- int r; -- -- r = syscall(SYS_swapcontext, oucp, ucp, sizeof(ucontext_t)); -- if (r < 0) -- { -- errno = -r; -- return -1; -- } -- -- return r; --#else -- errno = ENOSYS; -- return -1; --#endif --} -- -- --extern __typeof(__swapcontext) swapcontext __attribute__((weak, __alias__("__swapcontext"))); --- -2.19.2 - |