branches: 1.2.4;
try to fix the clang build: :pg_hi21: is a gas extension.

t_signal_and_sp: Test makecontext and pthread_create stack alignment.

PR kern/59327: user stack pointer is not aligned properly

branches: 1.1.4;
Test whether exec/spawn will zero registers.

Currently implemented only for a handful of architectures; should
extend this to all the others, and extend as appropriate if we find
more register content is worth testing (like maybe vector registers,
but they are managed differently anyway and less likely to leak).

VAX test contributed (and tested) by Kalvis Duckmanton, with some
tweaks by me; the others written and tested by me. IA64 skipped,
even though I suspect it _would_ leak if the kernel code ran as is,
because I have no way to test it.

PR kern/59084: exec/spawn leaks register content

branches: 1.1.4;
Test whether exec/spawn will zero registers.

Currently implemented only for a handful of architectures; should
extend this to all the others, and extend as appropriate if we find
more register content is worth testing (like maybe vector registers,
but they are managed differently anyway and less likely to leak).

VAX test contributed (and tested) by Kalvis Duckmanton, with some
tweaks by me; the others written and tested by me. IA64 skipped,
even though I suspect it _would_ leak if the kernel code ran as is,
because I have no way to test it.

PR kern/59084: exec/spawn leaks register content

branches: 1.3.4;
try to fix the clang build: :pg_hi21: is a gas extension.

t_signal_and_sp: Check sp on elf constructor/destructor entry too.

XXX Should maybe test both .ctors/.dtors and .init/fini_array, but
for now I'm limiting this to whatever gcc uses by default for each
architecture.

PR kern/59327: user stack pointer is not aligned properly

Test stack pointer alignment in various scenarios.

1. elf entry point
2. main function
3. signal handler

Extend the test to amd64 while here -- fortunately both aarch64 and
amd64 pass, but others, such as mips, will fail:

PR kern/59327: user stack pointer is not aligned properly

This extends the test that was previously written for:

PR kern/58149: aarch64: Cannot return from a signal handler if SP was
misaligned when the signal arrived

With any luck, this will help us to systematically eradicate misaligned
stack pointers as hypothesized to be the reason for:

PR port-mips/59236: Multiple segfaults in erlite3 boot

branches: 1.2.4;
t_execregs: On aarch64, make sure to align stack to 16 bytes.

Should avoid SIGBUS with strict alignment (SCTLR_EL0.A bit).

PR kern/59084: exec/spawn leaks register content

Test whether exec/spawn will zero registers.

Currently implemented only for a handful of architectures; should
extend this to all the others, and extend as appropriate if we find
more register content is worth testing (like maybe vector registers,
but they are managed differently anyway and less likely to leak).

VAX test contributed (and tested) by Kalvis Duckmanton, with some
tweaks by me; the others written and tested by me. IA64 skipped,
even though I suspect it _would_ leak if the kernel code ran as is,
because I have no way to test it.

PR kern/59084: exec/spawn leaks register content

branches: 1.2.4;
try to fix the clang build: :pg_hi21: is a gas extension.

Test stack pointer alignment in various scenarios.

1. elf entry point
2. main function
3. signal handler

Extend the test to amd64 while here -- fortunately both aarch64 and
amd64 pass, but others, such as mips, will fail:

PR kern/59327: user stack pointer is not aligned properly

This extends the test that was previously written for:

PR kern/58149: aarch64: Cannot return from a signal handler if SP was
misaligned when the signal arrived

With any luck, this will help us to systematically eradicate misaligned
stack pointers as hypothesized to be the reason for:

PR port-mips/59236: Multiple segfaults in erlite3 boot

Test stack pointer alignment in various scenarios.

1. elf entry point
2. main function
3. signal handler

Extend the test to amd64 while here -- fortunately both aarch64 and
amd64 pass, but others, such as mips, will fail:

PR kern/59327: user stack pointer is not aligned properly

This extends the test that was previously written for:

PR kern/58149: aarch64: Cannot return from a signal handler if SP was
misaligned when the signal arrived

With any luck, this will help us to systematically eradicate misaligned
stack pointers as hypothesized to be the reason for:

PR port-mips/59236: Multiple segfaults in erlite3 boot

branches: 1.1.2;
Add a test for kern/58149

aarch64: Cannot return from a signal handler if SP was misaligned when the signal arrived

branches: 1.1.4;
t_signal_and_sp: Test makecontext and pthread_create stack alignment.

PR kern/59327: user stack pointer is not aligned properly