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Merge branch 'linux64-syscall' of https://github.com/wangrunji0408/rcore_user into HEAD

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master
equation314 6 years ago
parent ddede19b61 5804df1c3b
commit 250f278a53
1 changed files with 14 additions and 8 deletions
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22
biscuit/c/libs/litc.c
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@ -87,20 +87,20 @@ static struct kinfo_t *kinfo;
// this macro to make sure the clobbers are coherent for these three pieces of // this macro to make sure the clobbers are coherent for these three pieces of
// code using syscalls. // code using syscalls.
#if defined(__x86_64__) #if defined(__x86_64__)
#define SYSCALL_CLOBBERS "cc", "memory", "r9", "r10", "r11", "r12", "r13", \ #define SYSCALL_CLOBBERS "cc", "memory", "r10", "r11", "r12", "r13", \
"r14", "r15" "r14", "r15"
#elif defined(__aarch64__) #elif defined(__aarch64__)
#define SYSCALL_CLOBBERS "cc", "memory" #define SYSCALL_CLOBBERS "cc", "memory"
#endif #endif
long long
syscall(long a1, long a2, long a3, long a4, syscall6(long a1, long a2, long a3, long a4, long a5, long a6, long trap)
long a5, long trap)
{ {
long ret; long ret;
#if defined(__x86_64__) #if defined(__x86_64__)
register long r8 asm("r8") = a5; register long r8 asm("r8") = a5;
register long r9 asm("r9") = a6;
// we may want to follow the sys5 abi and have the kernel restore // we may want to follow the sys5 abi and have the kernel restore
// r14-r15 too... // r14-r15 too...
@ -109,7 +109,7 @@ syscall(long a1, long a2, long a3, long a4,
"leaq 2(%%rip), %%r11\n" "leaq 2(%%rip), %%r11\n"
"syscall\n" "syscall\n"
: "=a"(ret) : "=a"(ret)
: "0"(trap), "D"(a1), "S"(a2), "d"(a3), "c"(a4), "r"(r8) : "0"(trap), "D"(a1), "S"(a2), "d"(a3), "c"(a4), "r"(r8), "r"(r9)
: SYSCALL_CLOBBERS); : SYSCALL_CLOBBERS);
#elif defined(__aarch64__) #elif defined(__aarch64__)
register long x8 asm("x8") = trap; register long x8 asm("x8") = trap;
@ -118,17 +118,25 @@ syscall(long a1, long a2, long a3, long a4,
register long x2 asm("x2") = a3; register long x2 asm("x2") = a3;
register long x3 asm("x3") = a4; register long x3 asm("x3") = a4;
register long x4 asm("x4") = a5; register long x4 asm("x4") = a5;
register long x5 asm("x5") = a6;
asm volatile( asm volatile(
"svc 0" "svc 0"
: "=r"(ret) : "=r"(ret)
: "r"(x8), "0"(x0), "r"(x1), "r"(x2), "r"(x3), "r"(x4) : "r"(x8), "0"(x0), "r"(x1), "r"(x2), "r"(x3), "r"(x4), "r"(x5)
: SYSCALL_CLOBBERS); : SYSCALL_CLOBBERS);
#endif #endif
return ret; return ret;
} }
long
syscall(long a1, long a2, long a3, long a4,
long a5, long trap)
{
return syscall6(a1, a2, a3, a4, a5, 0, trap);
}
#define SA(x) ((long)x) #define SA(x) ((long)x)
#define ERRNO_NZ(x) do { \ #define ERRNO_NZ(x) do { \
if (x != 0) { \ if (x != 0) { \
@ -464,10 +472,8 @@ mknod(const char *p, mode_t m, dev_t d)
void * void *
mmap(void *addr, size_t len, int prot, int flags, int fd, long offset) mmap(void *addr, size_t len, int prot, int flags, int fd, long offset)
{ {
ulong protflags = (ulong)prot << 32;
protflags |= flags;
long ret; long ret;
ret = syscall(SA(addr), SA(len), SA(protflags), SA(fd), ret = syscall6(SA(addr), SA(len), SA(prot), SA(flags), SA(fd),
SA(offset), SYS_MMAP); SA(offset), SYS_MMAP);
if (ret < 0 && -ret >= ERRNO_FIRST && -ret <= ERRNO_LAST) { if (ret < 0 && -ret >= ERRNO_FIRST && -ret <= ERRNO_LAST) {
errno = -ret; errno = -ret;

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