FreeCalypso > hg > freecalypso-tools
view target-utils/c139-lldbg/entry.S @ 924:d452188587b4
rvinterf: begin change to backslash escape output format
Right now throughout the rvinterf suite, any time we emit output that
is expected to be ASCII, but may contain non-printable garbage, we use
'cat -v' form of garbage character representation. Unfortunately, this
transformation is lossy (can't be reversed 100% reliably in the user's
wetware), hence we would like to migrate to C-style backslash escapes,
including doubling of any already-present backslashes - this escape
mechanism is lossless. Begin this change by converting the output
of RV and L1 traces in rvinterf and rvtdump.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Tue, 23 May 2023 03:10:50 +0000 |
parents | e7502631a0f9 |
children |
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.text .globl _entry _entry: .code 16 bx pc nop .code 32 stmfd sp!, {r0-r12,lr} mrs r0, CPSR mov r1, sp /* supervisor mode, disable all interrupts */ msr CPSR_c, #0xd3 ldr sp, =stack_bottom /* save entry SP and CPSR */ ldr r2, =lldbg_entry_cpsr str r0, [r2] ldr r2, =lldbg_entry_sp str r1, [r2] b main