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arm-linux-user: fix elfload.c's AT_HWCAP to reflect cpu features.

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The cpu capabilities passed by the elf loader in AT_HWCAP where
a constant.
Make AT_HWCAP reflect the emulated cpu features in order to give
correct clues to eglibc.

Riku Voipio: fixed to apply to current head

Fix :  [Bug 887516] [NEW] VFP support reported for the PXA270

Signed-off-by: Benoit Canet <benoit.canet@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Benoit Canet 2011-11-09 03:37:23 +00:00 committed by Riku Voipio
parent d1b02ea0dc
commit adf050b1b9
1 changed files with 27 additions and 4 deletions
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31
linux-user/elfload.c
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@ -375,10 +375,33 @@ bool guest_validate_base(unsigned long guest_base)
return 1; /* All good */
}
#define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \
| ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \
| ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP \
| ARM_HWCAP_ARM_NEON | ARM_HWCAP_ARM_VFPv3 )
#define ELF_HWCAP get_elf_hwcap()
static uint32_t get_elf_hwcap(void)
{
CPUARMState *e = thread_env;
uint32_t hwcaps = 0;
hwcaps |= ARM_HWCAP_ARM_SWP;
hwcaps |= ARM_HWCAP_ARM_HALF;
hwcaps |= ARM_HWCAP_ARM_THUMB;
hwcaps |= ARM_HWCAP_ARM_FAST_MULT;
hwcaps |= ARM_HWCAP_ARM_FPA;
/* probe for the extra features */
#define GET_FEATURE(feat, hwcap) \
do {if (arm_feature(e, feat)) { hwcaps |= hwcap; } } while (0)
GET_FEATURE(ARM_FEATURE_VFP, ARM_HWCAP_ARM_VFP);
GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);
GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);
GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);
GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPv3);
GET_FEATURE(ARM_FEATURE_VFP_FP16, ARM_HWCAP_ARM_VFPv3D16);
#undef GET_FEATURE
return hwcaps;
}
#endif