path: root/arch/x86_64/bits/signal.h
diff options
authorRich Felker <>2011-02-18 22:03:03 -0500
committerRich Felker <>2011-02-18 22:03:03 -0500
commitad2fe25041622b6cf426b0f98af0e52c2c9727f6 (patch)
treee824a24f6f6e7257ce8fc1077b33a98bebe50380 /arch/x86_64/bits/signal.h
parente9417fffb39c299e556c5ad0c1545f0c02618e3c (diff)
support the ugly and deprecated ucontext and sigcontext header stuff...
only the structures, not the functions from ucontext.h, are supported at this point. the main goal of this commit is to make modern gcc with dwarf2 unwinding build without errors. honestly, it probably doesn't matter how we define these as long as they have members with the right names to prevent errors while compiling libgcc. the only time they will be used is for propagating exceptions across signal-handler boundaries, which invokes undefined behavior anyway. but as-is, they're probably correct and may be useful to various low-level applications dealing with virtualization, jit code generation, and so on...
Diffstat (limited to 'arch/x86_64/bits/signal.h')
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/x86_64/bits/signal.h b/arch/x86_64/bits/signal.h
index 64ece19b..73b01284 100644
--- a/arch/x86_64/bits/signal.h
+++ b/arch/x86_64/bits/signal.h
@@ -1,6 +1,38 @@
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+struct __fpstate {
+ unsigned long __x[4];
+ unsigned char __y[384];
+ unsigned long __z[12];
+typedef struct {
+ unsigned long __gregs[23];
+ void *__fpregs;
+ unsigned long __reserved1[8];
+} mcontext_t;
+typedef struct __ucontext {
+ unsigned long uc_flags;
+ struct __ucontext *uc_link;
+ stack_t uc_stack;
+ mcontext_t uc_mcontext;
+ sigset_t uc_sigmask;
+ struct __fpstate __fpregs_mem;
+} ucontext_t;
+#ifdef _GNU_SOURCE
+struct sigcontext {
+ unsigned long r8, r9, r10, r11, r12, r13, r14, r15;
+ unsigned long rdi, rsi, rbp, rbx, rdx, rax, rcx, rsp, rip, eflags;
+ unsigned short cs, gs, fs, __pad0;
+ unsigned long err, trapno, oldmask, cr2;
+ struct __fpstate *fpstate;
+ unsigned long __reserved1[8];
struct __siginfo
int si_signo;