#ifndef __PERF_CACHE_H #define __PERF_CACHE_H #include "strbuf.h" #include #include "../ui/ui.h" #include #define CMD_EXEC_PATH "--exec-path" #define CMD_DEBUGFS_DIR "--debugfs-dir=" #define EXEC_PATH_ENVIRONMENT "PERF_EXEC_PATH" #define PERF_DEBUGFS_ENVIRONMENT "PERF_DEBUGFS_DIR" #define PERF_TRACEFS_ENVIRONMENT "PERF_TRACEFS_DIR" #define PERF_PAGER_ENVIRONMENT "PERF_PAGER" char *alias_lookup(const char *alias); int split_cmdline(char *cmdline, const char ***argv); #define alloc_nr(x) (((x)+16)*3/2) static inline int is_absolute_path(const char *path) { return path[0] == '/'; } char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2))); #endif /* __PERF_CACHE_H */ ='/cgit.cgi/'>index : net-next.git
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authorMaciej W. Rozycki <macro@imgtec.com>2016-05-12 10:19:08 +0100
committerRalf Baechle <ralf@linux-mips.org>2016-05-13 15:30:25 +0200
commitabf378be49f38c4d3e23581d3df3fa9f1b1b11d2 (patch)
tree82c262eb2b5e4adb85436b0dfaff434213213626
parent4249548454f7ba4581aeee26bd83f42b48a14d15 (diff)
MIPS: ptrace: Prevent writes to read-only FCSR bits
Correct the cases missed with commit 9b26616c8d9d ("MIPS: Respect the ISA level in FCSR handling") and prevent writes to read-only FCSR bits there. This in particular applies to FP context initialisation where any IEEE 754-2008 bits preset by `mips_set_personality_nan' are cleared before the relevant ptrace(2) call takes effect and the PTRACE_POKEUSR request addressing FPC_CSR where no masking of read-only FCSR bits is done. Remove the FCSR clearing from FP context initialisation then and unify PTRACE_POKEUSR/FPC_CSR and PTRACE_SETFPREGS handling, by factoring out code from `ptrace_setfpregs' and calling it from both places. This mostly matters to soft float configurations where the emulator can be switched this way to a mode which should not be accessible and cannot be set with the CTC1 instruction. With hard float configurations any effect is transient anyway as read-only bits will retain their values at the time the FP context is restored. Signed-off-by: Maciej W. Rozycki <macro@imgtec.com> Cc: stable@vger.kernel.org # v4.0+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/13239/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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