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linux-user: make MIPS and ARM eabi use same argument reordering 

MIPS uses similar calling convention than ARM eabi, where when using
64-bit values some registers are skipped. This patch makes MIPS and ARM
eabi share the argument reordering code.

This affects ftruncate64, creating insane sized fails (or just failing).

Cc: Wesley W. Terpstra <terpstra@debian.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Riku Voipio 2011-07-12 15:40:51 +03:00
parent c3edf3472f
commit 48e515d4fa
1 changed files with 18 additions and 20 deletions
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38
linux-user/syscall.c
View File

@ -580,6 +580,17 @@ extern int setfsuid(int);
extern int setfsgid(int);
extern int setgroups(int, gid_t *);
/* ARM EABI and MIPS expect 64bit types aligned even on pairs or registers */
#ifdef TARGET_ARM
static inline int regpairs_aligned(void *cpu_env) {
return ((((CPUARMState *)cpu_env)->eabi) == 1) ;
}
#elif defined(TARGET_MIPS)
static inline int regpairs_aligned(void *cpu_env) { return 1; }
#else
static inline int regpairs_aligned(void *cpu_env) { return 0; }
#endif
#define ERRNO_TABLE_SIZE 1200
/* target_to_host_errno_table[] is initialized from
@ -4375,13 +4386,10 @@ static inline abi_long target_truncate64(void *cpu_env, const char *arg1,
abi_long arg3,
abi_long arg4)
{
#ifdef TARGET_ARM
if (((CPUARMState *)cpu_env)->eabi)
{
if (regpairs_aligned(cpu_env)) {
arg2 = arg3;
arg3 = arg4;
}
#endif
}
return get_errno(truncate64(arg1, target_offset64(arg2, arg3)));
}
#endif
@ -4392,13 +4400,10 @@ static inline abi_long target_ftruncate64(void *cpu_env, abi_long arg1,
abi_long arg3,
abi_long arg4)
{
#ifdef TARGET_ARM
if (((CPUARMState *)cpu_env)->eabi)
{
if (regpairs_aligned(cpu_env)) {
arg2 = arg3;
arg3 = arg4;
}
#endif
}
return get_errno(ftruncate64(arg1, target_offset64(arg2, arg3)));
}
#endif
@ -6857,20 +6862,16 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
#endif
#ifdef TARGET_NR_pread
case TARGET_NR_pread:
#ifdef TARGET_ARM
if (((CPUARMState *)cpu_env)->eabi)
if (regpairs_aligned(cpu_env))
arg4 = arg5;
#endif
if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
goto efault;
ret = get_errno(pread(arg1, p, arg3, arg4));
unlock_user(p, arg2, ret);
break;
case TARGET_NR_pwrite:
#ifdef TARGET_ARM
if (((CPUARMState *)cpu_env)->eabi)
if (regpairs_aligned(cpu_env))
arg4 = arg5;
#endif
if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
goto efault;
ret = get_errno(pwrite(arg1, p, arg3, arg4));
@ -7621,14 +7622,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
#ifdef TARGET_NR_readahead
case TARGET_NR_readahead:
#if TARGET_ABI_BITS == 32
#ifdef TARGET_ARM
if (((CPUARMState *)cpu_env)->eabi)
{
if (regpairs_aligned(cpu_env)) {
arg2 = arg3;
arg3 = arg4;
arg4 = arg5;
}
#endif
ret = get_errno(readahead(arg1, ((off64_t)arg3 << 32) | arg2, arg4));
#else
ret = get_errno(readahead(arg1, arg2, arg3));