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Although the LP32 mips sigset_t is large enough to represent all signals,
their jmp_buf is too small. This test succeeded on arm and x86 because the
RT signals were never in the 'expected' sigset_t, so the equality comparison
with the 'actual' sigset_t worked fine --- everyone was blind to the RT
signal. On mips the tests fail because the 'expected' sigset_t does contain
the RT signal but the 'actual' doesn't because the jmp_buf only saves and
restores the first 32 signals.

There are 32 free bits (currently used as padding) in the LP32 mips jmp_buf,
and they might choose to use those to provide better support than the other
two platforms, but I'll leave that to them. It will be easy to just remove
the #if defined(__LP64__) from this change in that case.

For mips64 it's not to late to increase the size of the jmp_buf and fix
the setjmp family, but since there are decisions to be made here for LP32,
I'll leave it all to Imagination folks...

Bug: 16918359
Change-Id: I6b723712fce0e9210dafa165d8599d950b2d3500

Bug: 18686270
Change-Id: I800a6f0940060218413df652d74aca91f6a339f8

Make sure we adjust the stack pointer so a signal can't overwrite data.

Bug: 15195265
Change-Id: I5ab9469a82cb214c32f40a713268a1ab74a4c6fa

   Directly save data into stack without properly adjustment
   of stack point is dangous. For example, if a signal comes,
   kernel will put sigframe into userspace's stack, which
   will overwrite the saved data if sp is not adjusted properly.

Bug: 15195265
Change-Id: Iea0cadfd3b94d50cf40252ad52fe5950811b9192
Signed-off-by: Jiangli Yuan <a6808c@motorola.com>

Bug: 18627763
Change-Id: Ib1c406320f0ecc3705d19183a48f986cdf57c279

Be safe by default.

Change-Id: I6c4a3f1fd4eee3a651b3162ce95b7e873de57521

Change-Id: I8bb511840f3cd98d5008034e405d82e923bd3203

Change-Id: I866097d8468aa8f326117d072444ebbc2a690719

Change-Id: I2c2ca47f5a21b78754c03deb3e9467ab79d9d033

Change-Id: I7a8dbb74bd622693c9fef60bd779687207517b7d

Bug: 18489947
Change-Id: I2e834d68bc10ca5fc7ebde047b517a3074179475

We can rely on the compiler's builtins. Tested on arm, arm64, mips, x86,
and x86-64.

Change-Id: I0f774ed7e85b3c791a3178d8ef17c6500e6a9ace

Bug: 16918359
Change-Id: I9033a7d178d431ddb09f1cfa6e4bf95ae02346e9

Imagination already did the work to make the contents of these directories
identical. Let's take advantage of that fact.

Change-Id: Ib101ba39041fb500c9c618fa2020e72aa2ccd9c2

The use of 32-bit units for 64-bit stores and loads was driving me crazy.

Bug: 16918359
Change-Id: Ifb73aad8f8985a2adfcf5913b783ad9424f23e06

Specifically, use the argument to sigsetjmp as a flag in the buffer
to indicate whether or not the signal mask is valid.

Bug: 16918359
Change-Id: I5bb1f1220f14c105c6bc57e0c28c1dc366d1438f

Bug: 16918359
Change-Id: I30bf61e7d5f1c21daa3a1a21d361e98d77220bf3

Bug: 16918359
Change-Id: Ieb15f7f1658f5accee05665b72ba17831a80ea9d

Bug: 16918359
Change-Id: Ic8ca0af9ea99636bc71f19d46071f1cea6eef982

Bug: 16918359
Change-Id: I9b986bdbdbaefe9d9896a820ee8cfe860adfe5c5