ObjFW  Check-in [21244a7e62]

Overview
Comment:Use `bti c` instead of `bti jc`

The `j` isn't necessary, as tail call eliminations can just use x16/x17,
which allow any type.

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Files: files | file ages | folders
SHA3-256: 21244a7e6291184a1ebc69033682fc99783961ffd8daf9d2179250a750456e3c
User & Date: js on 2024-02-24 22:30:47
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Context
2024-02-25
21:19
OFLHAArchiveEntry: Create more compatible archives check-in: 431696dee5 user: js tags: 1.0
2024-02-24
22:30
Use `bti c` instead of `bti jc` check-in: 21244a7e62 user: js tags: 1.0
22:30
Use `bti c` instead of `bti jc` check-in: ddb7ebcf5b user: js tags: trunk
21:15
Set version to 1.0.10 check-in: 8f026dba58 user: js tags: 1.0, 1.0.10-release
Changes
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Modified configure.ac from [5e8a507046] to [c0c6842cf8].

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		AC_MSG_RESULT(no)
	])
	;;
aarch64* | arm64*)
	AC_MSG_CHECKING(for bti)
	AC_COMPILE_IFELSE([
		AC_LANG_PROGRAM([], [
			__asm__ __volatile__ ("bti jc");
			__asm__ __volatile__ ("bti c");
		])
	], [
		AC_DEFINE(HAVE_BTI, 1, [Whether we have bti])
		AC_MSG_RESULT(yes)
	], [
		AC_MSG_RESULT(no)
	])
︙

Modified src/forwarding/apple-forwarding-arm64.S from [ff5af9e7d0] to [eb3a920f88].

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	.long 0, 0

.section __TEXT, __text, regular, pure_instructions
.align 2
_OFForward:
_OFForward_stret:
#ifdef HAVE_BTI
	bti	jc
	bti	c
#endif

	stp	fp, lr, [sp, #-208]!
	mov	fp, sp
	sub	sp, sp, #208

	/* Save all arguments, x8 and x19 */
︙

Modified src/forwarding/forwarding-arm64-elf.S from [d964627f1b] to [09fe8e02cc].

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.globl OFForward
.globl OFForward_stret

.section .text
OFForward:
OFForward_stret:
#ifdef HAVE_BTI
	bti	jc
	bti	c
#endif

	stp	fp, lr, [sp, #-208]!
	mov	fp, sp
	sub	sp, sp, #208

	/* Save all arguments, x8 and x19 */
︙

Modified src/runtime/lookup-asm/lookup-asm-arm64-elf.S from [bed2f1a908] to [3e4b869d59].

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.globl objc_msg_lookup_super
.globl objc_msg_lookup_super_stret

.section .text
.macro GENERATE_LOOKUP name notFound
\name:
#ifdef HAVE_BTI
	bti	jc
	bti	c
#endif

	cbz	x0, returnNilMethod

	tst	x0, #1
	b.ne	.LtaggedPointer_\name
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.type \name, %function
.size \name, .-\name
.endm

.macro GENERATE_LOOKUP_SUPER name lookup
\name:
#ifdef HAVE_BTI
	bti	jc
	bti	c
#endif

	mov	x2, x0
	ldr	x0, [x0]
	cbz	x0, returnNilMethod

	ldr	x2, [x2, #8]
︙

Fossil 2.23 [47362306a7] 2023-11-01 18:56:47
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