RepoMirrors
/
musl
mirror of git://git.musl-libc.org/musl
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

fix x32 syscall arch.h timespec fixup code 

it's legal to call the __syscall functions with more arguments than
necessary, and the __syscall_cp cancel dummy impl. does just that.

thus we must insert the switch for all possible syscalls numbers
into all of the syscallN inline functions.
This commit is contained in:
rofl0r 2014-02-23 20:46:30 +01:00
parent e002f660b8
commit d05aaedaab
1 changed files with 49 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

102
arch/x32/syscall_arch.h
View File

@ -6,6 +6,27 @@ typedef long long syscall_arg_t;
struct __timespec { long long tv_sec; long tv_nsec; };
struct __timespec_kernel { long long tv_sec; long long tv_nsec; };
#define __tsc(X) ((struct __timespec*)(unsigned long)(X))
#define __fixup(X) do { if(X) X = (unsigned long) (&(struct __timespec_kernel) \
{ .tv_sec = __tsc(X)->tv_sec, .tv_nsec = __tsc(X)->tv_nsec}); } while(0)
#define __fixup_case_2 \
case SYS_nanosleep: \
__fixup(a1); break; \
case SYS_clock_settime: \
__fixup(a2); break;
#define __fixup_case_3 \
case SYS_clock_nanosleep: case SYS_rt_sigtimedwait: case SYS_ppoll: \
__fixup(a3); break; \
case SYS_utimensat: \
if(a3) a3 = (unsigned long) ((struct __timespec_kernel[2]) { \
[0] = {.tv_sec = __tsc(a3)[0].tv_sec, .tv_nsec = __tsc(a3)[0].tv_nsec}, \
[1] = {.tv_sec = __tsc(a3)[1].tv_sec, .tv_nsec = __tsc(a3)[1].tv_nsec}, \
}); break;
#define __fixup_case_4 \
case SYS_futex: \
if((a2 & (~128 /* FUTEX_PRIVATE_FLAG */)) == 0 /* FUTEX_WAIT */) __fixup(a4); break;
#define __fixup_case_5 \
case SYS_mq_timedsend: case SYS_mq_timedreceive: case SYS_pselect6: \
__fixup(a5); break;
static __inline long __syscall0(long long n)
{
@ -26,13 +47,7 @@ static __inline long __syscall2(long long n, long long a1, long long a2)
unsigned long ret;
struct __timespec *ts2 = 0;
switch (n) {
case SYS_nanosleep:
if(a1) a1 = (unsigned long) (&(struct __timespec_kernel) {
.tv_sec = __tsc(a1)->tv_sec, .tv_nsec = __tsc(a1)->tv_nsec});
break;
case SYS_clock_settime:
if(a2) a2 = (unsigned long) (&(struct __timespec_kernel) {
.tv_sec = __tsc(a2)->tv_sec, .tv_nsec = __tsc(a2)->tv_nsec});
__fixup_case_2;
}
__asm__ __volatile__ ("syscall" : "=a"(ret) : "a"(n), "D"(a1), "S"(a2)
: "rcx", "r11", "memory");
@ -42,80 +57,61 @@ static __inline long __syscall2(long long n, long long a1, long long a2)
static __inline long __syscall3(long long n, long long a1, long long a2, long long a3)
{
unsigned long ret;
switch (n) {
__fixup_case_2;
__fixup_case_3;
}
__asm__ __volatile__ ("syscall" : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
"d"(a3) : "rcx", "r11", "memory");
return ret;
}
static __inline long __syscall4(long long n, long long a1, long long a2, long long a3,
long long a4)
long long a4_)
{
unsigned long ret;
register long long r10 __asm__("r10") = a4;
register long long a4 __asm__("r10") = a4_;
switch (n) {
case SYS_futex:
if((a2 & (~128 /* FUTEX_PRIVATE_FLAG */)) == 0 /* FUTEX_WAIT */) {
if(r10) r10 = (unsigned long) (&(struct __timespec_kernel) {
.tv_sec = __tsc(r10)->tv_sec, .tv_nsec = __tsc(r10)->tv_nsec});
}
break;
case SYS_utimensat:
if(a3) a3 = (unsigned long) ((struct __timespec_kernel[2]) {
[0] = {.tv_sec = __tsc(a3)[0].tv_sec, .tv_nsec = __tsc(a3)[0].tv_nsec},
[1] = {.tv_sec = __tsc(a3)[1].tv_sec, .tv_nsec = __tsc(a3)[1].tv_nsec},
});
break;
case SYS_clock_nanosleep:
case SYS_rt_sigtimedwait: case SYS_ppoll:
if(a3) a3 = (unsigned long) (&(struct __timespec_kernel) {
.tv_sec = __tsc(a3)->tv_sec, .tv_nsec = __tsc(a3)->tv_nsec});
__fixup_case_2;
__fixup_case_3;
__fixup_case_4;
}
__asm__ __volatile__ ("syscall" : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
"d"(a3), "r"(r10): "rcx", "r11", "memory");
"d"(a3), "r"(a4): "rcx", "r11", "memory");
return ret;
}
static __inline long __syscall5(long long n, long long a1, long long a2, long long a3,
long long a4, long long a5)
long long a4_, long long a5_)
{
unsigned long ret;
register long long r10 __asm__("r10") = a4;
register long long r8 __asm__("r8") = a5;
register long long a4 __asm__("r10") = a4_;
register long long a5 __asm__("r8") = a5_;
switch (n) {
case SYS_futex:
if((a2 & (~128 /* FUTEX_PRIVATE_FLAG */)) == 0 /* FUTEX_WAIT */) {
if(r10) r10 = (unsigned long) (&(struct __timespec_kernel) {
.tv_sec = __tsc(r10)->tv_sec, .tv_nsec = __tsc(r10)->tv_nsec});
}
break;
case SYS_mq_timedsend: case SYS_mq_timedreceive:
if(r8) r8 = (unsigned long) (&(struct __timespec_kernel) {
.tv_sec = __tsc(r8)->tv_sec, .tv_nsec = __tsc(r8)->tv_nsec});
__fixup_case_2;
__fixup_case_3;
__fixup_case_4;
__fixup_case_5;
}
__asm__ __volatile__ ("syscall" : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
"d"(a3), "r"(r10), "r"(r8) : "rcx", "r11", "memory");
"d"(a3), "r"(a4), "r"(a5) : "rcx", "r11", "memory");
return ret;
}
static __inline long __syscall6(long long n, long long a1, long long a2, long long a3,
long long a4, long long a5, long long a6)
long long a4_, long long a5_, long long a6_)
{
unsigned long ret;
register long long r10 __asm__("r10") = a4;
register long long r8 __asm__("r8") = a5;
register long long r9 __asm__("r9") = a6;
register long long a4 __asm__("r10") = a4_;
register long long a5 __asm__("r8") = a5_;
register long long a6 __asm__("r9") = a6_;
switch (n) {
case SYS_futex:
if((a2 & (~128 /* FUTEX_PRIVATE_FLAG */)) == 0 /* FUTEX_WAIT */) {
if(r10) r10 = (unsigned long) (&(struct __timespec_kernel) {
.tv_sec = __tsc(r10)->tv_sec, .tv_nsec = __tsc(r10)->tv_nsec});
}
break;
case SYS_pselect6:
if(r8) r8 = (unsigned long) (&(struct __timespec_kernel) {
.tv_sec = __tsc(r8)->tv_sec, .tv_nsec = __tsc(r8)->tv_nsec});
__fixup_case_2;
__fixup_case_3;
__fixup_case_4;
__fixup_case_5;
}
__asm__ __volatile__ ("syscall" : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
"d"(a3), "r"(r10), "r"(r8), "r"(r9) : "rcx", "r11", "memory");
"d"(a3), "r"(a4), "r"(a5), "r"(a6) : "rcx", "r11", "memory");
return ret;
}