diff options
| author | Al Viro <viro@ftp.linux.org.uk> | 2011-08-18 20:05:19 +0100 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2011-11-02 14:14:59 +0100 |
| commit | ab1c0cc7c96c17ea903ca6d3e42e7d2696b32b6c (patch) | |
| tree | 9a72e06cab7b6dd293b16048d2928695c935ea46 /arch/um/os-Linux | |
| parent | 248b74c79ebb9fb55e146797a808836d90418c4b (diff) | |
um: finish conversion to mcontext_t
now we don't mix host and guest signal frame layouts anymore; moreover,
we don't need host's struct sigcontext at all.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/os-Linux')
| -rw-r--r-- | arch/um/os-Linux/signal.c | 6 | ||||
| -rw-r--r-- | arch/um/os-Linux/sys-x86/Makefile | 2 | ||||
| -rw-r--r-- | arch/um/os-Linux/sys-x86/mcontext.c | 31 |
3 files changed, 35 insertions, 4 deletions
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c index 07d9905e44e..9f2c2228f7a 100644 --- a/arch/um/os-Linux/signal.c +++ b/arch/um/os-Linux/signal.c @@ -14,7 +14,7 @@ #include "os.h" #include "process.h" #include "sysdep/barrier.h" -#include "sysdep/sigcontext.h" +#include "sysdep/mcontext.h" void (*sig_info[NSIG])(int, struct uml_pt_regs *) = { [SIGTRAP] = relay_signal, @@ -34,7 +34,7 @@ static void sig_handler_common(int sig, mcontext_t *mc) r.is_user = 0; if (sig == SIGSEGV) { /* For segfaults, we want the data from the sigcontext. */ - copy_sc(&r, (struct sigcontext *)mc); + get_regs_from_mc(&r, mc); GET_FAULTINFO_FROM_MC(r.faultinfo, mc); } @@ -84,7 +84,7 @@ static void real_alarm_handler(mcontext_t *mc) struct uml_pt_regs regs; if (mc != NULL) - copy_sc(®s, (struct sigcontext *)mc); + get_regs_from_mc(®s, mc); regs.is_user = 0; unblock_signals(); timer_handler(SIGVTALRM, ®s); diff --git a/arch/um/os-Linux/sys-x86/Makefile b/arch/um/os-Linux/sys-x86/Makefile index 22cc5073c02..253bfb8cb70 100644 --- a/arch/um/os-Linux/sys-x86/Makefile +++ b/arch/um/os-Linux/sys-x86/Makefile @@ -3,7 +3,7 @@ # Licensed under the GPL # -obj-y = registers.o task_size.o +obj-y = registers.o task_size.o mcontext.o obj-$(CONFIG_X86_32) += tls.o obj-$(CONFIG_64BIT) += prctl.o diff --git a/arch/um/os-Linux/sys-x86/mcontext.c b/arch/um/os-Linux/sys-x86/mcontext.c new file mode 100644 index 00000000000..1d33d72c628 --- /dev/null +++ b/arch/um/os-Linux/sys-x86/mcontext.c @@ -0,0 +1,31 @@ +#include <sys/ucontext.h> +#define __FRAME_OFFSETS +#include <asm/ptrace.h> +#include <sysdep/ptrace.h> + +void get_regs_from_mc(struct uml_pt_regs *regs, mcontext_t *mc) +{ +#ifdef __i386__ +#define COPY2(X,Y) regs->gp[X] = mc->gregs[REG_##Y] +#define COPY(X) regs->gp[X] = mc->gregs[REG_##X] +#define COPY_SEG(X) regs->gp[X] = mc->gregs[REG_##X] & 0xffff; +#define COPY_SEG_CPL3(X) regs->gp[X] = (mc->gregs[REG_##X] & 0xffff) | 3; + COPY_SEG(GS); COPY_SEG(FS); COPY_SEG(ES); COPY_SEG(DS); + COPY(EDI); COPY(ESI); COPY(EBP); + COPY2(UESP, ESP); /* sic */ + COPY(EBX); COPY(EDX); COPY(ECX); COPY(EAX); + COPY(EIP); COPY_SEG_CPL3(CS); COPY(EFL); COPY_SEG_CPL3(SS); +#else +#define COPY2(X,Y) regs->gp[X/sizeof(unsigned long)] = mc->gregs[REG_##Y] +#define COPY(X) regs->gp[X/sizeof(unsigned long)] = mc->gregs[REG_##X] + COPY(R8); COPY(R9); COPY(R10); COPY(R11); + COPY(R12); COPY(R13); COPY(R14); COPY(R15); + COPY(RDI); COPY(RSI); COPY(RBP); COPY(RBX); + COPY(RDX); COPY(RAX); COPY(RCX); COPY(RSP); + COPY(RIP); + COPY2(EFLAGS, EFL); + COPY2(CS, CSGSFS); + regs->gp[CS / sizeof(unsigned long)] &= 0xffff; + regs->gp[CS / sizeof(unsigned long)] |= 3; +#endif +} |