Skip to content

refactor: Improve debug experience with CFI directives #4719

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Nov 24, 2025
Merged

refactor: Improve debug experience with CFI directives #4719

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
32 changes: 20 additions & 12 deletions core/iwasm/common/arch/invokeNative_thumb.s
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,7 @@ invokeNative:
.globl _invokeNative
_invokeNative:
#endif /* end of BH_PLATFORM_DARWIN */

.cfi_startproc
/*
* Arguments passed in:
*
Expand All @@ -24,34 +24,40 @@ _invokeNative:
push {r4, r5, r6, r7}
push {lr}
sub sp, sp, #4 /* make sp 8 byte aligned */
.cfi_def_cfa_offset 24
.cfi_offset lr, -20
.cfi_offset r4, -16
.cfi_offset r5, -12
.cfi_offset r6, -8
.cfi_offset r7, -4
mov ip, r0 /* ip = function ptr */
mov r4, r1 /* r4 = argv */
mov r5, r2 /* r5 = argc */

cmp r5, #1 /* at least one argument required: exec_env */
blt return
blt .Lreturn

mov r6, #0 /* increased stack size */

ldr r0, [r4] /* r0 = argv[0] = exec_env */
add r4, r4, #4 /* r4 += 4 */
cmp r5, #1
beq call_func
beq .Lcall_func

ldr r1, [r4] /* r1 = argv[1] */
add r4, r4, #4
cmp r5, #2
beq call_func
beq .Lcall_func

ldr r2, [r4] /* r2 = argv[2] */
add r4, r4, #4
cmp r5, #3
beq call_func
beq .Lcall_func

ldr r3, [r4] /* r3 = argv[3] */
add r4, r4, #4
cmp r5, #4
beq call_func
beq .Lcall_func

sub r5, r5, #4 /* argc -= 4, now we have r0 ~ r3 */

Expand All @@ -66,29 +72,31 @@ _invokeNative:
mov sp, r7

mov lr, r2 /* save r2 */
loop_args: /* copy left arguments to stack */

.Lloop_args: /* copy left arguments to stack */
cmp r5, #0
beq call_func1
beq .Lcall_func1
ldr r2, [r4]
add r4, r4, #4
str r2, [r7]
add r7, r7, #4
sub r5, r5, #1
b loop_args
b .Lloop_args

call_func1:
.Lcall_func1:
mov r2, lr /* restore r2 */

call_func:
.Lcall_func:
blx ip
add sp, sp, r6 /* restore sp */

return:
.Lreturn:
add sp, sp, #4 /* make sp 8 byte aligned */
pop {r3}
pop {r4, r5, r6, r7}
mov lr, r3
bx lr
.cfi_endproc
#if defined(__linux__) && defined(__ELF__)
.section .note.GNU-stack,"",%progbits
#endif
Loading