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Browse source 
You can now say `gdb hello.com.dbg` and it'll work perfectly.
This commit is contained in:
Justine Tunney 2025-03-30 15:25:20 -07:00
parent afc986f741
commit fbc4fcbb71
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GPG key ID: BE714B4575D6E328
18 changed files with 230 additions and 67 deletions
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52
libc/runtime/ftrace-hook.S
View file

@ -28,8 +28,12 @@ ftrace_hook:
cmpl $0,__ftrace(%rip)
jle 1f
.cfi_startproc
push %rbp
.cfi_def_cfa_offset 16
.cfi_offset %rbp, -16
mov %rsp,%rbp
.cfi_def_cfa_register %rbp
and $-16,%rsp
sub $128,%rsp
movdqu %xmm0,-0x80(%rbp)
@ -41,13 +45,21 @@ ftrace_hook:
movdqu %xmm6,-0x20(%rbp)
movdqu %xmm7,-0x10(%rbp)
push %rax
.cfi_offset %rax, -24
push %rcx
.cfi_offset %rcx, -32
push %rdx
.cfi_offset %rdx, -40
push %rdi
.cfi_offset %rdi, -48
push %rsi
.cfi_offset %rsi, -56
push %r8
.cfi_offset %r8, -64
push %r9
.cfi_offset %r9, -72
push %r10
.cfi_offset %r10, -80
call ftracer
movdqu -0x80(%rbp),%xmm0
movdqu -0x70(%rbp),%xmm1
@ -66,12 +78,20 @@ ftrace_hook:
pop %rcx
pop %rax
leave
.cfi_restore %rbp
.cfi_def_cfa %rsp, 8
1: ret
.cfi_endproc
#elif defined(__aarch64__)
stp x29,x30,[sp,-384]!
.cfi_startproc
.cfi_def_cfa_offset 384
.cfi_offset 29, -384 // x29 (fp) is saved at [sp - 384]
.cfi_offset 30, -376 // x30 (lr) is saved at [sp - 376]
mov x29,sp
.cfi_def_cfa_register 29
stp x0,x1,[sp,16]
adrp x0,__ftrace
@ -80,18 +100,45 @@ ftrace_hook:
ble 1f
stp x2,x3,[sp,32]
.cfi_offset 2, -352
.cfi_offset 3, -344
stp x4,x5,[sp,48]
.cfi_offset 4, -336
.cfi_offset 5, -328
stp x6,x7,[sp,64]
.cfi_offset 6, -320
.cfi_offset 7, -312
stp x8,x9,[sp,80]
.cfi_offset 8, -304
.cfi_offset 9, -296
stp x10,x11,[sp,96]
.cfi_offset 10, -288
.cfi_offset 11, -280
stp x12,x13,[sp,112]
.cfi_offset 12, -272
.cfi_offset 13, -264
stp x14,x15,[sp,128]
.cfi_offset 14, -256
.cfi_offset 15, -248
stp x16,x19,[sp,160]
.cfi_offset 16, -224
.cfi_offset 19, -216
stp x20,x21,[sp,176]
.cfi_offset 20, -208
.cfi_offset 21, -200
stp x22,x23,[sp,192]
.cfi_offset 22, -192
.cfi_offset 23, -184
stp x24,x25,[sp,208]
.cfi_offset 24, -176
.cfi_offset 25, -168
stp x26,x27,[sp,224]
.cfi_offset 26, -160
.cfi_offset 27, -152
stp x17,x28,[sp,240]
.cfi_offset 17, -144
.cfi_offset 28, -136
// No CFI directives needed for FP registers
stp q0,q1,[sp,256]
stp q2,q3,[sp,288]
stp q4,q5,[sp,320]
@ -119,7 +166,12 @@ ftrace_hook:
1: ldp x0,x1,[sp,16]
ldp x29,x30,[sp],384
.cfi_restore 29
.cfi_restore 30
.cfi_def_cfa 7, 0 // On some ARM systems the stack pointer is represented by register 7
.cfi_def_cfa_offset 0
ret
.cfi_endproc
#endif /* __x86_64__ */
.endfn ftrace_hook,globl,hidden