6d8330afb6
This commit resumes management of the stack boundaries and limits when switching between tasks. This additionally leverages the __morestack function to run code on "stack overflow". The current behavior is to abort the process, but this is probably not the best behavior in the long term (for deails, see the comment I wrote up in the stack exhaustion routine).
40 lines
731 B
ArmAsm
40 lines
731 B
ArmAsm
// Mark stack as non-executable
|
|
#if defined(__linux__) && defined(__ELF__)
|
|
.section .note.GNU-stack, "", @progbits
|
|
#endif
|
|
|
|
.text
|
|
|
|
.globl record_sp_limit
|
|
.align 2
|
|
.set nomips16
|
|
.ent record_sp_limit
|
|
record_sp_limit:
|
|
.set noreorder
|
|
.set nomacro
|
|
.set push
|
|
.set mips32r2
|
|
rdhwr $3, $29
|
|
.set pop
|
|
addiu $3, $3, -0x7004
|
|
sw $4, 0($3)
|
|
jr $31
|
|
nop
|
|
.end record_sp_limit
|
|
|
|
.globl get_sp_limit
|
|
.align 2
|
|
.set nomips16
|
|
.ent get_sp_limit
|
|
get_sp_limit:
|
|
.set noreorder
|
|
.set nomacro
|
|
.set push
|
|
.set mips32r2
|
|
rdhwr $3, $29
|
|
.set pop
|
|
addiu $3, $3, -0x7004
|
|
lw $2, 0($3)
|
|
jr $31
|
|
nop
|
|
.end get_sp_limit
|