2 * Special handling for the MS-DOS derivative: syslinux_ldlinux
6 #define _XOPEN_SOURCE 500 /* Required on glibc 2.x */
15 #define __noinline __attribute__((noinline))
18 uint8_t get_8_sl(const uint8_t * p)
23 asm volatile("movb %%fs:%1,%0":"=q" (v):"m"(*p));
28 uint16_t get_16_sl(const uint16_t * p)
33 asm volatile("movw %%fs:%1,%0":"=r" (v):"m"(*p));
37 uint32_t get_32_sl(const uint32_t * p)
42 asm volatile("movl %%fs:%1,%0":"=r" (v):"m"(*p));
47 uint64_t get_64_sl(const uint64_t * p)
50 const uint32_t *pp = (const uint32_t *)set_fs(p);
52 asm volatile("movl %%fs:%1,%0" : "=r" (v0) : "m" (pp[0]));
53 asm volatile("movl %%fs:%1,%0" : "=r" (v1) : "m" (pp[1]));
54 return v0 + ((uint64_t)v1 << 32);
59 void set_8_sl(uint8_t * p, uint8_t v)
62 asm volatile("movb %1,%%fs:%0":"=m" (*p):"qi"(v));
66 void set_16_sl(uint16_t * p, uint16_t v)
69 asm volatile("movw %1,%%fs:%0":"=m" (*p):"ri"(v));
72 void set_32_sl(uint32_t * p, uint32_t v)
75 asm volatile("movl %1,%%fs:%0":"=m" (*p):"ri"(v));
78 void set_64_sl(uint64_t * p, uint64_t v)
80 uint32_t *pp = (uint32_t *)set_fs(p);
81 asm volatile("movl %1,%%fs:%0" : "=m" (pp[0]) : "ri"((uint32_t)v));
82 asm volatile("movl %1,%%fs:%0" : "=m" (pp[1]) : "ri"((uint32_t)(v >> 32)));
85 void memcpy_to_sl(void *dst, const void *src, size_t len)
90 seg = ds() + ((size_t)dst >> 4);
91 off = (size_t)dst & 15;
93 asm volatile("pushw %%es ; "
97 : "+D" (off), "+S" (src), "+c" (len)
102 void memcpy_from_sl(void *dst, const void *src, size_t len)
107 seg = ds() + ((size_t)src >> 4);
108 off = (size_t)src & 15;
110 asm volatile("pushw %%ds ; "
114 : "+D" (dst), "+S" (off), "+c" (len)