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annotate target-utils/c139-lldbg/entry.S @ 965:2969032bdfac

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fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing The only 100% safe way to pass a NULL pointer as a function argument in K&R C is to cast 0 to a pointer type; failing to do so may cause mysterious bugs (invalid stack frames or garbage in argument registers) on 64-bit machines. This issue has already been fixed in most of FC host tools, but I just found some missed spots: passing of NULL UDH to PDU encoding functions in fcup-smsend[mult] in the case of single (not concatenated) SMS.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 01 Sep 2023 07:33:51 +0000
parents e7502631a0f9
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1 .text
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2 .globl _entry
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3 _entry:
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4 .code 16
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5 bx pc
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6 nop
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7
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8 .code 32
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9 stmfd sp!, {r0-r12,lr}
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10 mrs r0, CPSR
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11 mov r1, sp
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12 /* supervisor mode, disable all interrupts */
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13 msr CPSR_c, #0xd3
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14 ldr sp, =stack_bottom
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15 /* save entry SP and CPSR */
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16 ldr r2, =lldbg_entry_cpsr
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17 str r0, [r2]
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18 ldr r2, =lldbg_entry_sp
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19 str r1, [r2]
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20 b main