+#ifndef UST_PROCESSOR_H
+#define UST_PROCESSOR_H
+
+#include <stddef.h>
+
+#ifdef X86_32
+
+struct registers {
+ long eax;
+ long ebx;
+ long ecx;
+ long edx;
+ long ebp;
+ long esp;
+ long esi;
+ long edi;
+ int xds;
+ int xes;
+ int xfs;
+ int xgs;
+ long eip;
+ int xcs;
+ long eflags;
+ int xss;
+};
+
+static inline save_registers(struct registers *regs)
+{
+}
+
+#define RELATIVE_ADDRESS(__rel_label__) __rel_label__
+
+#define _ASM_PTR ".long "
+
+#else
+
+struct registers {
+ unsigned long rax;
+ unsigned long rbx;
+ unsigned long rcx;
+ unsigned long rdx;
+ unsigned long rbp;
+ unsigned long rsp;
+ unsigned long rsi;
+ unsigned long rdi;
+ unsigned long r8;
+ unsigned long r9;
+ unsigned long r10;
+ unsigned long r11;
+ unsigned long r12;
+ unsigned long r13;
+ unsigned long r14;
+ unsigned long r15;
+ int cs;
+ int ss;
+};
+
+#define save_registers(regsptr) \
+ asm ("movq %%rax,%c[rax_off](%[regs])\n\t" \
+ "movq %%rbx,%c[rbx_off](%[regs])\n\t" \
+ "movq %%rcx,%c[rcx_off](%[regs])\n\t" \
+ "movq %%rdx,%c[rdx_off](%[regs])\n\t" \
+ "movq %%rbp,%c[rbp_off](%[regs])\n\t" \
+ "movq %%rsp,%c[rsp_off](%[regs])\n\t" \
+ "movq %%rsi,%c[rsi_off](%[regs])\n\t" \
+ "movq %%rdi,%c[rdi_off](%[regs])\n\t" \
+ "movq %%r8,%c[r8_off](%[regs])\n\t" \
+ "movq %%r9,%c[r9_off](%[regs])\n\t" \
+ "movq %%r10,%c[r10_off](%[regs])\n\t" \
+ "movq %%r11,%c[r11_off](%[regs])\n\t" \
+ "movq %%r12,%c[r12_off](%[regs])\n\t" \
+ "movq %%r13,%c[r13_off](%[regs])\n\t" \
+ "movq %%r14,%c[r14_off](%[regs])\n\t" \
+ "movq %%r15,%c[r15_off](%[regs])\n\t" \
+ "movw %%cs,%c[cs_off](%[regs])\n\t" \
+ "movw %%ss,%c[ss_off](%[regs])\n\t" \
+ : \
+ : [regs] "r" (regsptr), \
+ [rax_off] "i" (offsetof(struct registers, rax)), \
+ [rbx_off] "i" (offsetof(struct registers, rbx)), \
+ [rcx_off] "i" (offsetof(struct registers, rcx)), \
+ [rdx_off] "i" (offsetof(struct registers, rdx)), \
+ [rbp_off] "i" (offsetof(struct registers, rbp)), \
+ [rsp_off] "i" (offsetof(struct registers, rsp)), \
+ [rsi_off] "i" (offsetof(struct registers, rsi)), \
+ [rdi_off] "i" (offsetof(struct registers, rdi)), \
+ [r8_off] "i" (offsetof(struct registers, r8)), \
+ [r9_off] "i" (offsetof(struct registers, r9)), \
+ [r10_off] "i" (offsetof(struct registers, r10)), \
+ [r11_off] "i" (offsetof(struct registers, r11)), \
+ [r12_off] "i" (offsetof(struct registers, r12)), \
+ [r13_off] "i" (offsetof(struct registers, r13)), \
+ [r14_off] "i" (offsetof(struct registers, r14)), \
+ [r15_off] "i" (offsetof(struct registers, r15)), \
+ [cs_off] "i" (offsetof(struct registers, cs)), \
+ [ss_off] "i" (offsetof(struct registers, ss)) \
+ );
+
+/* Macro to insert the address of a relative jump in an assembly stub,
+ * in a relocatable way. On x86-64, this uses a special (%rip) notation. */
+#define RELATIVE_ADDRESS(__rel_label__) __rel_label__(%%rip)
+
+#define _ASM_PTR ".quad "
+
+#endif
+
+#endif /* UST_PROCESSOR_H */